Auto-Track™
Sequencing
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PTH05030W —5-V Input
30-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Modules
NOMINAL SIZE = 1.37 in x 1.12 in
(34,8 mm x 28,5 mm)
Description
The PTH05030 is a series of highcurrent non-isolated power modules
from Texas Instruments. This product is
characterized by high efficiencies, and
up to 30 A of output current, while occupying a mere 1.64 in² of PCB area. In
terms of cost, size, and performance, the
series provides OEM’s with a flexible
module that meets the requirements of
the most complex and demanding mixedsignal applications. These include the
most densly populated, multi-processor
systems that incorporate high-speed
DSP’s, microprocessors, and ASICs.
The series uses double-sided surface
mount construction and provides highperformance step-down power conversion
from a 5-V input bus voltage. The out-
SLTS210B – MAY 2003 – REVISED JANUARY 2004
Features
• Up to 30 A Output Current
• 5-V Input Voltage
• Wide-Output Voltage Adjust
(0.8 V to 3.6 V)
• 180 W/in³ Power Density
• On/Off Inhibit
• Efficiencies up to 94 %
• Pre-Bias Startup
• Margin Up/Down Controls
• Under-Voltage Lockout
put voltage of the PTH05030W can be
set to any value over the range 0.8 V to
3.6 V, using a single resistor.
This series includes Auto-Track™.
Auto-Track simplifies power-up and
power-down supply voltage sequencing
in a system by enabling modules to track
each other, or any other external voltage.
Each model also includes an on/off
inhibit, output voltage adjust (trim), and
margin up/down controls. An output
voltage sense ensures tight load regulation,
and an output over-current and thermal
shutdown feature provide for protection
against external load faults.
Package options inlude both through-
hole and surface mount configurations.
• Auto-Track™ Sequencing
• Output Over-Current Protection
(Non-Latching, Auto-Reset)
• Over-Temperature Protection
• Operating Temp: –40 to +85 °C
• Safety Agency Approvals:
UL 1950, CSA 22.2 950, EN60950
VDE (Pending)
• Point-of-Load Alliance (POLA)
Compatible
Pin Configuration
Pin Function
1 GND
2V
in
3 GND
4 Inhibit *
5Vo Adjust
6Vo Sense
7 GND
8V
out
9V
out
10 GND
11 Track
12 Margin Down *
13 Margin Up *
* Denotes negative logic:
Open = Normal operation
Ground = Function active
Standard Application
Standard Application
Track
Margin Down
Margin Up
V
Inhibit
GND
For technical support and further information, visit http://power.ti.com
IN
C
IN
1,500 µF
(Required)
R
= Required to set the output voltage to a value
set
higher than 0.8 V. (see spec. table for values).
Cin= Required 1,500 µF capacitor.
C
= Optional 330 µF capacitor.
13 12 11
1
2
3
+
R
SET
0.5 %, 0.1 W
(Required)
PTH05030W
(Top View)
654
10
9
8
7
C
OUT
330 µF
(Optional)
out
V
OUT
Vo Sense
+
GND
L
O
A
D
PTH05030W —5-V Input
30-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Modules
Ordering Information
Output Voltage
Code Voltage
W 0.8 V – 3.6 V (Adjust)
Notes: (1) Add “T” to end of part number for tape and reel on SMD packages only.
(2) Reference the applicable package reference drawing for the dimensions and PC board layout
(3) “Standard” option specifies 63/37, Sn/Pb pin solder material.
(PTH05030Hxx)
Package Options
Code Description Pkg Ref.
AH Horiz. T/H (EUM)
AS SMD, Standard
(PTH05030xHH)
Pin Descriptions
Vin: The positive input voltage power node to the mod-
ule, which is referenced to common GND.
Vout: The regulated positive power output with respect
to the GND node.
GND: This is the common ground connection for the
Vin and Vout power connections. It is also the 0 VDC
reference for the control inputs.
Inhibit: The Inhibit pin is an open-collector/drain negative
logic input that is referenced to GND. Applying a lowlevel ground signal to this input disables the module’s
output and turns off the output voltage. When the Inhibit
control is active, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is left
open-circuit, the module will produce an output whenever a valid input source is applied.
Vo Adjust: A 0.1 W 1 % resistor must be directly connected
between this pin and pin 7 (GND) to set the output voltage
to a value higher than 0.8 V. The temperature stability of
the resistor should be 100 ppm/°C (or better). The set
point range for the output voltage is from 0.8 V to 3.6 V.
The resistor value required for a given output voltage
may be calculated from the following formula. If left
open circuit, the output voltage will default to its lowest
value. For further information on output voltage adjustment consult the related application note.
R
set
= 10 k ·
The specification table gives the preferred resistor values
for a number of standard output voltages.
0.8 V
V
– 0.8 V
out
– 2.49 k
SLTS210B – MAY 2003 – REVISED JANUARY 2003
(1)
(2)
(3)
(EUN)
Vo Sense: The sense input allows the regulation circuit to
compensate for voltage drop between the module and
the load. For optimal voltage accuracy Vo Sense should
be connected to Vout. It can also be left disconnected.
Track: This is an analog control input that enables the
output voltage to follow an external voltage. This pin
becomes active typically 20 ms after the input voltage
has been applied, and allows direct control of the output
voltage from 0 V up to the nominal set-point voltage.
Within this range the output will follow the voltage at
the Track pin on a volt-for-volt basis. When the control
voltage is raised above this range, the module regulates
at its set-point voltage. The feature allows the output
voltage to rise simultaneously with other modules powered from the same input bus. If unused, this input should
be connected to V
. Note: Due to the under-voltage lockout
in
feature, the output of the module cannot follow its own input
voltage during power up. For more information, consult the
related application note.
Margin Down: When this input is asserted to GND, the
output voltage is decreased by 5% from the nominal. The
input requires an open-collector (open-drain) interface.
It is not TTL compatible. A lower percent change can
be accomodated with a series resistor. For further information, consult the related application note.
Margin Up: When this input is asserted to GND, the
output voltage is increased by 5%. The input requires an
open-collector (open-drain) interface. It is not TTL
compatible. The percent change can be reduced with a
series resistor. For further information, consult the
related application note.
For technical support and further information, visit http://power.ti.com
PTH05030W —5-V Input
30-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Modules
SLTS210B – MAY 2003 – REVISED JANUARY 2004
Environmental & Absolute Maximum Ratings (Voltages are with respect to GND)
Characteristics Symbols Conditions Min Typ Max Units
Track Input Voltage V
Operating Temperature Range T
Solder Reflow Temperature T
Storage Temperature T
Mechanical Shock Per Mil-STD-883D, Method 2002.3
Mechanical Vibration Mil-STD-883D, Method 2007.2 Suffix S — 10 —
track
a
reflow
s
Over Vin Range –40 — 85 °C
Surface temperature of module body or pins 235
— –40 — 125 °C
1 msec, ½ Sine, mounted
20-2000 Hz Suffix H — 20 —
Weight — — 10 — grams
Flammability — Meets UL 94V-O
Notes: (i) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum.
Specifications (Unless otherwise stated, T
=25 °C, Vin =5 V, V
a
=3.3 V, Cin =1,500 µF, C
out
=0 µF, and Io =Iomax)
out
Characteristics Symbols Conditions Min Typ Max Units
Output Current I
Input Voltage Range V
o
in
60 °C, 200 LFM airflow 0 — 30
25 °C, natural convection 0 — 30
Over Io range 4.5 — 5.5 V
Set-Point Voltage Tolerance Vo tol — — ±2
Temperature Variation ∆Reg
Line Regulation ∆Reg
Load Regulation ∆Reg
Total Output Variation ∆Reg
temp
line
load
tot
Efficiency η I
Vo Ripple (pk-pk) V
r
–40 °C <Ta < +85 °C — ±0.5 — %V
Over Vin range — ±10 — mV
Over Io range — ±12 — mV
Includes set-point, line, load,
–40 °C ≤ Ta ≤ +85 °C
=20 A R
o
= 698 Ω Vo = 3.3 V — 94 —
SET
= 2.21 kΩ Vo = 2.5 V — 93 —
R
SET
= 5.49 kΩ Vo = 1.8 V — 90 —
R
SET
= 8.87 kΩ Vo = 1.5 V — 89 —
R
SET
= 17.4 kΩ Vo = 1.2 V — 87 —
R
SET
R
= 36.5 kΩ Vo = 1.0 V — 86 —
SET
20 MHz bandwidth — 40 — mVpp
Over-Current Threshold Io trip Reset, followed by auto-recovery — 47 — A
Transient Response 1 A/µs load step, 50 to 100 % Iomax,
t
tr
∆V
tr
C
out
=330 µF
Recovery Time — 70 — µSec
Vo over/undershoot — 100 — mV
Margin Up/Down Adjust Vo adj — ± 5 — %
Margin Input Current (pins 12 /13) IIL margin Pin to GND — – 8
Track Input Current (pin 11) IIL track Pin to GND — — –130
Track Slew Rate Capability dV
Under-Voltage Lockout UVLO Vin increasing — 4.3 4.45
Inhibit Control (pin4) Referenced to GND
Input High Voltage V
Input Low Voltage
Input Low Current
V
I
IL
IH
IL
inhibit
/dt C
track
≤ C
(max) — — 1 V/ms
out
out
Vin decreasing 3.4 3.7 —
Pin to GND — –130 — µA
Input Standby Current Iin inh Inhibit (pin 4) to GND, Track (pin 11) open — 10 — mA
Switching Frequency ƒ
External Input Capacitance C
External Output Capacitance C
s
in
out
Over Vin and Io ranges 275 300 235 kHz
Capacitance value non-ceramic 0 330
ceramic 0 — 300
Equiv. series resistance (non-ceramic) 4
Reliability MTBF Per Bellcore TR-332
Notes:
(1) See SOA curves or consult factory for appropriate derating.
(2) The set-point voltage tolerlance is affected by the tolerance and stability of R
with 100 ppm/°C or better temperature stability.
(3) A small low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc.
(4) This control pin has an internal pull-up to the input voltage Vin. If it is left open-circuit the module will operate when input power is applied. A small
low-leakage (<100 nA) MOSFET is recommended for control. For further information, consult the related application note.
(5) A 1,500 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimum of 900 mA rms of ripple current.
(6) An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load will improve the transient response.
(7) This is the calculated maximum. The minimum ESR limitation will often result in a lower value. Consult the application notes for further guidance.
(8) This is the typical ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 m
50 % stress, Ta =40 °C, ground benign
. The stated limit is unconditionally met if R
SET
Ω
as the minimum when using max-ESR values to calculate.
–0.3 — Vin + 0.3 V
(i)
— 500 — G’s
PTH05030W
(1)
(1)
(2)
——±3%V
(3)
—µA
(4)
16,500
(4)
(7)
Vin –0.5 — Open
–0.2 — 0.8
(5)
1,500
——µF
(6)
(8)
——mΩ
2.8 — — 10
has a tolerance of 1 %
SET
°C
G’s
A
%V
%
µA
V
V
µF
6
o
o
o
Hrs
For technical support and further information, visit http://power.ti.com
)
)
PTH05030W —5-V Input
Typical Characteristics
30-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Modules
Characteristic Data; Vin =5 V (See Note A)
Efficiency vs Load Current
100
90
80
70
Efficiency - %
60
50
0 5 10 15 20 25 30
Output Ripple vs Load Current
100
80
60
40
Ripple - mV
20
Iout - Amps
SLTS210B – MAY 2003 – REVISED JANUARY 2004
Safe Operating Area; Vin =5 V (See Note B)
All Output Voltages
90
V
OUT
3.3
2.5
1.8
1.2
0.8
V
OUT
2.5
1.8
3.3
1.2
0.8
80
70
60
50
40
Ambient Temperature (°C)
30
20
0 5 10 15 20 25 30
Iout (A
Airflow
400LFM
200LFM
100LFM
Nat Conv
0
0 5 10 15 20 25 30
Power Dissipation vs Load Current
10
8
6
4
Pd - Watts
2
0
0 5 10 15 20 25 30
Iout (A
Iout - Amps
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures. Derating limits apply to
modules soldered directly to a 4 in.
×
4 in. double-sided PCB with 1 oz. copper.
For technical support and further information, visit http://power.ti.com
Application Notes
PTH03030W & PTH05030W
Capacitor Recommendations for the PTH03030 &
PTH05030 Series of Power Modules
Input Capacitor
The recommended input capacitor(s) is determined by
the 1,500 µF
minimum ripple current rating.
Ripple current and <100 mΩ equivalent series resistance
(ESR) values are the major considerations, along with
temperature, when designing with different types of
capacitors. Unlike polymer tantalum, conventional tantalum capacitors have a recommended minimum voltage
rating of 2 × (maximum DC voltage + AC ripple). This
is standard practice to ensure reliability.
For improved ripple reduction on the input bus, ceramic
capacitors may be used to complement electrolytic types
and achieve the minimum required capacitance.
Output Capacitors (Optional)
For applications with load transients (sudden changes in
load current), regulator response will benefit from an
external output capacitance. The recommended output
capacitance of 330 µF will allow the module to meet
its transient response specification (see product data sheet).
For most applications, a high quality computer-grade
aluminum electrolytic capacitor is most suitable. These
capacitors provide adequate decoupling over the frequency
range, 2 kHz to 150 kHz, and are suitable when ambient
temperatures are above 0 °C. For operation below 0 °C,
tantalum, ceramic or Os-Con type capacitors are recommended. When using one or more non-ceramic capacitors,
the calculated equivalent ESR should be no lower than
4 mΩ (7 mΩ using the manufacturer’s maximum ESR
for a single capacitor). A list of preferred low-ESR type
capacitors are identified in Table 1-1.
Ceramic Capacitors
Above 150 kHz the performance of aluminum electrolytic
capacitors becomes less effective. To further improve the
reflected input ripple current or the output transient
response, multilayer ceramic capacitors can also be added.
Ceramic capacitors have very low ESR and their resonant
frequency is higher than the bandwidth of the regulator.
When used on the output their combined ESR is not
critical as long as the total value of ceramic capacitance
does not exceed 300 µF. Also, to prevent the formation of
local resonances, do not place more than five identical ceramic capacitors in parallel with values of 10 µF or greater.
Tantalum Capacitors
Tantalum type capacitors can be used at both the input
and output, and are recommended for applications where
the ambient operating temperature can be less than 0 °C.
The AVX TPS, Sprague 593D/594/595 and Kemet T495/
T510 capacitor series are suggested over many other
tantalum types due to their higher rated surge, power
(1)
minimum capacitance and 900 mArms
dissipation, and ripple current capability. As a caution
many general purpose tantalum capacitors have considerably higher ESR, reduced power dissipation and lower
ripple current capability. These capacitors are also less
reliable when determining their power dissipation and
surge current capability. Tantalum capacitors that do
not have a stated ESR or surge current rating are not
recommended for power applications.
When specifying Os-Con and polymer tantalum capacitors
for the output, the minimum ESR limit will be encountered well before the maximum capacitance value is
reached.
Capacitor Table
Table 1-1 identifies the characteristics of capacitors from a
number of vendors with acceptable ESR and ripple current
(rms) ratings. The recommended number of capacitors
required at both the input and output buses is identified
for each capacitor type.
This is not an extensive capacitor list. Capacitors from other
vendors are available with comparable specifications. Those
listed are for guidance. The RMS ripple current rating and
ESR (at 100kHz) are critical parameters necessary to insure
both optimum regulator performance and long capacitor life.
Designing for Very Fast Load Transients
The transient response of the DC/DC converter has been
characterized using a load transient with a di/dt of 1 A/µs.
The typical voltage deviation for this load transient is
given in the data sheet specification table using the
optional value of output capacitance. As the di/dt of a
transient is increased, the response of a converter’s regulation circuit ultimately depends on its output capacitor
decoupling network. This is an inherent limitation with
any DC/DC converter once the speed of the transient
exceeds its bandwidth capability. If the target application
specifies a higher di/dt or lower voltage deviation, the
requirement can only be met with additional output
capacitor decoupling. In these cases special attention
must be paid to the type, value and ESR of the capacitors
selected.
If the transient performance requirements exceed that
specified in the data sheet, or the total amount of load
capacitance is above 3,000 µF, the selection of output
capacitors becomes more important. For further guidance
consult the separate application note, “Selecting Capaci-
tors for PTH Products in High-Performance Applications.”
For technical support and further information, visit http://power.ti.com
Application Notes
continued
PTH03030W & PTH05030W
Table 1-1: Input/Output Capacitors
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)DMS(AW
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noc-imehCdetinU
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:mulatnaT,XVA
tnaT-yloP,025T
cimareC,ataruMR5X)DMS(V3.6
)laidaR(noc-sO,AS49
)DMS(mulatnaT,D595
)laidaR(munimulA,ZXL
cinagrO/tnaT-yloP,035T
).DMS(munimulA-yloP(,AXP
:munimulA-yloP,cinosanaP
)DMS(R5XcimareC,temeKV61
scitsiretcarahCroticapaCytitnauQ
gnikroW
eulaV
egatloV
)Fµ(
V01
V61
V61
V01
V3.6
V3.6
V01
V01
V3.6
V01
V01
V3.6
V3.6
V3.6
065
0051
0051
0022
0001
028
086
0001
0001
0051
074
028
065
081
074
V01
V3.6
V01
V3.6
V01
V61
074
074
033
074
074
0022
01
V3.6
74
001
V3.6
74
V61
22
V61
01
001
V3.6
74
V61
22
V61
01
RSE.xaM
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C°58@tnerruC
)smrI(
090.0 Ω
340.0 Ω
060.0 Ω
060.0 Ω
310.0 Ω
010.0 Ω
090.0 Ω
860.0 Ω
350.0 Ω
050.0 Ω
510.0 Ω
210.0 Ω
020.0 Ω
500.0 Ω
540.0 Ω
060.0 Ω
810.0 Ω
510.0 Ω
210.0 Ω
001.0 Ω
510.0 Ω
200.0 Ω
Am009>
Am0961
Am0011
Am0011
Am5394
Am0055
Am009>
Am0501
Am0301
Am0601
Am0054>
Am0445>
Am0015
Am0004
Am3271
Am6281
× W7.5 × H1.4
Am0021>
Am0083>
Am0024
Am0441
Am0479
—esac0121
200.0 Ω
200.0 Ω —esac0121
200.0 Ω —esac0121
01 × 5.21
61 × 51
5.21 × 5.31
5.21 × 5.31
01 × 5.01
01 × 2.21
01 × 5.21
01 × 61
01 × 5.21
61 × 51
01 × 5.01
01 × 7.21
01 × 2.01
3.7 × 3.4 × 2.4
L3.7
W3.4
× L3.7
× H0.4
L2.7 × W6
× H1.4
61 × 52
eziSlacisyhP
)mm(
mm5223
mm5223
mm5223
tupnI
suB
3
1
1
1
2
2
3
2
2
1
3
2
3
R/N
3
3
3
5
3
3
1
1
1
1
1
1
1
1
1
tuptuO
rebmuNtraProdneV
suB
1
1
1
1
≤2
≤2
1
1
1
1
]1[
≤3
≤2
≤4
≤1
]1[
≤5
]1[
≤5
]1[
≤5
≤3
]1[
≤2
]1[
≤5
≤3
]2[
≤5
]2[
≤5
]2[
3≤
]2[
≤5
]2[
≤5
≤5
]2[
3≤
]2[
≤5
]2[
≤5
≤5
165A1CFUEE
S251C1CFUEE
Q251C1KFVEE
Q222A1KFVEE
M0001XF6
PT21JM028CV3.6AXP
LL21X01M186BV01ZXL
LL61X01M201BV01ZXL
RPM201J0DHU
6HHM251A1MPU
M074PS01
M028PVS6
P165J0AWFEE
R181J0ESFEE
5400R010M774ESPT
0600R010M774VSPT
810ES600M774X025T
SA010M733X035T
SA600M774X035T
T2R0100X774D595
PBH6100X801AS49
CAP4M601C0121C
CAP9K674C0121C
M701J06RE23MRG
M674J06RE23MRG
K622C16RE23MRG
K601C16RD23MRG
TM701J0R5X5223C
TM674J0R5X5223C
TM622C1R5X5223C
TM601C1R5X5223C
[1] The total capacitance is slightly lower than 1,500 µF, but is acceptable based on the combined ripple current rating.
[2] A ceramic capacitor may be used to complement electrolytic types at the input to further reduce high-frequency ripple current
For technical support and further information, visit http://power.ti.com
Application Notes
PTH03030W & PTH05030W
Adjusting the Output Voltage of the PTH03030W &
PTH05030W Wide-Output Adjust Power Modules
The Vo Adjust control (pin 4) sets the output voltage of the
PTH03030W and PTH05030W products to a value higher
than 0.8 V. The adjustment range of the PT03030W
(3.3-V input) is from 0.8 V to 2.5 V
1
, and the PTH05030W
(5-V input) from 0.8 V to 3.6 V. For an output voltage
other than 0.8 V a single external resistor, R
, must be
set
connected directly between the Vo Adjust and GND pins 2.
Table 2-1 gives the preferred value of the external resistor
for a number of standard voltages, along with the actual
output voltage that this resistance value provides.
For other output voltages the value of the required resistor
can either be calculated using the following formula, or
simply selected from the range of values given in Table 2-2.
Figure 2-1 shows the placement of the required resistor.
R
set
= 10 kΩ ·
Table 2-1; Preferred Values of R
V
(Standard) R
out
1
3.3 V
2.5 V 2.21 kΩ 2.502 V
2 V 4.12 kΩ 2.010 V
1.8 V 5.49 kΩ 1.803 V
1.5 V 8.87 kΩ 1.504 V
1.2 V 17.4 kΩ 1.202 V
1 V 36.5 kΩ 1.005 V
0.8 V Open 0.8 V
Figure 2-1; Vo Adjust Resistor Placement
13 6
PTH05030W
GND Adjust
1, 3, 7
0.8 V
V
– 0.8 V
out
for Standard Output Voltages
set
(Pref’d Value) V
set
698 Ω 3.309V
12 11
Sense
GND
5
10
R
1 %, 0.1 W
V
SET
O
8, 9
– 2.49 kΩ
(Actual)
out
Vo Sense
V
C
OUT
330 µF
(Optional)
OUT
Table 2-2; Output Voltage Set-Point Resistor Values
Va Req’dR
0.800 Open
0.825 318 kΩ
0.850 158 kΩ
0.875 104 kΩ
0.900 77.5 kΩ
0.925 61.5 kΩ
0.950 50.8 kΩ
0.975 43.2 kΩ
1.000 37.5 kΩ
1.025 33.1 kΩ
1.050 29.5 kΩ
1.075 26.6 kΩ
1.100 24.2 kΩ
1.125 22.1 kΩ
1.150 20.4 kΩ
1.175 18.8 kΩ
1.200 17.5 kΩ
1.225 16.3 kΩ
1.250 15.3 kΩ
1.275 14.4 kΩ
1.300 13.5 kΩ
1.325 12.7 kΩ
1.350 12.1 kΩ
1.375 11.4 kΩ
1.400 10.8 kΩ
1.425 10.3 kΩ
1.450 9.82 kΩ
1.475 9.36 kΩ
1.50 8.94 kΩ
1.55 8.18 kΩ
1.60 7.51 kΩ
1.65 6.92 kΩ
1.70 6.4 kΩ
1.75 5.93 kΩ
1.80 5.51 kΩ
1.85 5.13 kΩ
1.90 4.78 kΩ
1.95 4.47 kΩ
set
Va Req’dR
2.00 4.18 kΩ
2.05 3.91 kΩ
2.10 3.66 kΩ
2.15 3.44 kΩ
2.20 3.22 kΩ
2.25 3.03 kΩ
2.30 2.84 kΩ
2.35 2.67 kΩ
2.40 2.51 kΩ
2.45 2.36 kΩ
2.50 2.22 kΩ
2.55 2.08 kΩ
2.60 1.95 kΩ
2.65 1.83 kΩ
2.70 1.72 kΩ
2.75 1.61 kΩ
2.80 1.51 kΩ
2.85 1.41 kΩ
2.90 1.32 kΩ
2.95 1.23 kΩ
3.00 1.15 kΩ
3.05 1.07 kΩ
3.10 988 Ω
3.15 914 Ω
3.20 843 Ω
3.25 775 Ω
3.30 710 Ω
3.35 647 Ω
3.40 587 Ω
3.45 529 Ω
3.50 473 Ω
3.55 419 Ω
3.60 367 Ω
set
Notes:
1. Modules that operate from a 3.3-V input bus should
not be adjusted higher than 2.5 V.
2. Use a 0.1 W resistor. The tolerance should be 1 %, with
temperature stability of 100 ppm/°C (or better). Place
the resistor as close to the regulator as possible. Connect
the resistor directly between pins 5 and 10 using dedicated
PCB traces.
3. Never connect capacitors from V
. Any capacitance added to the Vo Adjust pin will affect
V
out
Adjust to either GND or
o
the stability of the regulator.
GND
For technical support and further information, visit http://power.ti.com
GND
Application Notes
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
Features of the PTH Family of Non-Isolated
Wide Output Adjust Power Modules
Point-of-Load Alliance
The PTH family of non-isolated, wide-output adjust
power modules from Texas Instruments are optimized
for applications that require a flexible, high performance
module that is small in size. These products are part of
the “Point-of-Load Alliance” (POLA), which ensures
compatible footprint, interoperability and true second
sourcing for customer design flexibility. The POLA is a
collaboration between Texas Instruments, Artesyn Technologies, and Astec Power to offer customers advanced
non-isolated modules that provide the same functionality
and form factor. Product series covered by the alliance
includes the PTHxx050W (6 A), PTHxx060W (10 A),
PTHxx010W (15/12 A), PTHxx020W (22/18 A), and
the PTHxx030W (30/26 A).
From the basic, “Just Plug it In” functionality of the 6-A
modules, to the 30-A rated feature-rich PTHxx030W,
these products were designed to be very flexible, yet simple
to use. The features vary with each product. Table 3-1
provides a quick reference to the available features by
product and input bus voltage.
Table 3-1; Operating Features by Series and Input Bus Voltage
output current, PTHxx020W and PTHxx030W products
incorporate over-temperature shutdown protection. All
of the products referenced in Table 3-1 include AutoTrack™. This is a feature unique to the PTH family,
and was specifically designed to simplify the task of sequencing the supply voltage in a power system. These
and other features are described in the following sections.
Soft-Start Power Up
The Auto-Track feature allows the power-up of multiple
PTH modules to be directly controlled from the Track
pin. However in a stand-alone configuration, or when
the Auto-Track feature is not being used, the Track pin
should be directly connected to the input voltage, V
(see Figure 3-1).
Figure 3–1
Adjust
7104
5
62
V
O
R
, 698Ω
SET
0.1 W, 1 %
5 V
+
C
1,000 µF
98
Track
Up Dn Sense
V
PTH05020W
IN
GNDInhibit
1
3
IN
+
C
OUT
330 µF
in
3.3 V
Series Input Bus I
PTHxx050
PTHxx060
PTHxx010
PTHxx020
PTHxx030
3.3 V / 5 V 6 A
12 V 6 A
3.3 V / 5 V 10 A
12 V 8 A
3.3 V / 5 V 15 A
12 V 12 A
3.3 V / 5 V 22 A
12 V 18 A
3.3 V / 5 V 30 A
12 V 26 A
Adjust (Trim)
OUT
•••••
••• •
•••••••
••• •••
•••••••
••• •••
••••••••
••• ••••
••••••••
••••••••
Over-Current
On/Off Inhibit
Pre-Bias Startup
Margin Up/Down
Auto-Track™
Output Sense
For simple point-of-use applications, the PTHxx050W
provides operating features such as an on/off inhibit,
output voltage trim, pre-bias startup (3.3/5-V input only),
and over-current protection. The PTHxx060W (10 A),
and PTHxx010W (15/12 A) include an output voltage
sense, and margin up/down controls. Then the higher
GND
Thermal Shutdown
When the Track pin is connected to the input voltage the
Auto-Track function is permanently disengaged. This
allows the module to power up entirely under the control
of its internal soft-start circuitry. When power up is under
soft-start control, the output voltage rises to the set-point
at a quicker and more linear rate.
Figure 3–2
HORIZ SCALE: 5 ms/Div
GND
Vin (1 V/Div)
Vout (1 V/Div)
Iin (5 A/Div)
For technical support and further information visit http://power.ti.com
Application Notes
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
From the moment a valid input voltage is applied, the
soft-start control introduces a short time delay (typically
5 ms-10 ms) before allowing the output voltage to rise.
The output then progressively rises to the module’s setpoint voltage. Figure 3-2 shows the soft-start power-up
characteristic of the 22-A output product (PTH05020W),
operating from a 5-V input bus and configured for a 3.3-V
output. The waveforms were measured with a 5-A resistive
load, with Auto-Track disabled. The initial rise in input
current when the input voltage first starts to rise is the
charge current drawn by the input capacitors. Power-up
is complete within 15 ms.
Over-Current Protection
For protection against load faults, all modules incorporate
output over-current protection. Applying a load that
exceeds the regulator’s over-current threshold will cause
the regulated output to shut down. Following shutdown
a module will periodically attempt to recover by initiating
a soft-start power-up. This is described as a “hiccup” mode
of operation, whereby the module continues in a cycle of
successive shutdown and power up until the load fault is
removed. During this period, the average current flowing
into the fault is significantly reduced. Once the fault is
removed, the module automatically recovers and returns
to normal operation.
Over-Temperature Protection
The PTHxx020 and PTHxx030 series of products have
over-temperature protection. These products have an
on-board temperature sensor that protects the module’s
internal circuitry against excessively high temperatures.
A rise in the internal temperature may be the result of a
drop in airflow, or a high ambient temperature. If the
internal temperature exceeds the OTP threshold, the
module’s Inhibit control is automatically pulled low. This
turns the output off. The output voltage will drop as the
external output capacitors are discharged by the load
circuit. The recovery is automatic, and begins with a
soft-start power up. It occurs when the the sensed temperature decreases by about 10 °C below the trip point.
Note: The over-temperature protection is a last resort mechanism to prevent thermal stress to the regulator. Operation at
or close to the thermal shutdown temperature is not recommended and will reduce the long-term reliability of the module.
Always operate the regulator within the specified Safe Operating
Area (SOA) limits for the worst-case conditions of ambient
temperature and airflow.
Output On/Off Inhibit
For applications requiring output voltage on/off control,
each series of the PTH family incorporates an output
Inhibit control pin. The inhibit feature can be used wherever there is a requirement for the output voltage from
the regulator to be turned off.
The power modules function normally when the Inhibit
pin is left open-circuit, providing a regulated output
whenever a valid source voltage is connected to V
with
in
respect to GND.
Figure 3-3 shows the typical application of the inhibit
function. Note the discrete transistor (Q
). The Inhibit
1
control has its own internal pull-up to Vin potential. The
input is not compatible with TTL logic devices. An opencollector (or open-drain) discrete transistor is recommended
for control.
Figure 3–3
Sense
V
o
9
10
V
IN
C
1,000 µF
1 =Inhibit
GND GND
+
IN
Q
BSS138
3
1
8
PTH05020W
1
7
R
5
V
62
4
C
SET
OUT
330 µF
OUT
+
Turning Q1 on applies a low voltage to the Inhibit control
and disables the output of the module. If Q1 is then turned
off, the module will execute a soft-start power-up. A
regulated output voltage is produced within 20 msec.
Figure 3-4 shows the typical rise in both the output voltage and input current, following the turn-off of Q1. The
turn off of Q1 corresponds to the rise in the waveform,
Q1 Vds. The waveforms were measured with a 5-A load.
Figure 3–4
Vo (2V/Div)
Iin (2A/Div)
Q1Vds (5V/Div)
HORIZ SCALE: 10ms/Div
L
O
A
D
For technical support and further information visit http://power.ti.com
Application Notes
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
Auto-Track™ Function
The Auto-Track function is unique to the PTH family,
and is available with the all “Point-of-Load Alliance”
(POLA) products. Auto-Track was designed to simplify
the amount of circuitry required to make the output
voltage from each module power up and power down in
sequence. The sequencing of two or more supply voltages
during power up is a common requirement for complex
mixed-signal applications, that use dual-voltage VLSI ICs
such as DSPs, micro-processors, and ASICs.
How Auto-Track Works
Auto-Track works by forcing the module’s output voltage
to follow a voltage presented at the Track control pin. This
control range is limited to between 0 V and the module’s
set-point voltage. Once the track-pin voltage is raised
above the set-point voltage, the module’s output remains
at its set-point
regulator is at 1 V, the regulated output will be 1 V. But
if the voltage at the Track pin rises to 3 V, the regulated
output will not go higher than 2.5 V.
When under track control, the regulated output from
the module follows the voltage at its Track pin on a voltfor-volt basis. By connecting the Track pin of a number
of these modules together, the output voltages will follow a common signal during power-up and power-down.
The control signal can be an externally generated master
ramp waveform, or the output voltage from another power
supply circuit
porates an internal RC charge circuit. This operates off
the module’s input voltage to provide a suitable rising
voltage ramp waveform.
Typical Application
The basic implementation of Auto-Track allows for
simultaneous voltage sequencing of a number of AutoTrack compliant modules. Connecting the Track control
pins of two or more modules forces the Track control of
all modules to follow the same collective RC ramp waveform, and allows them to be controlled through a single
transistor or switch; Q1 in Figure 3-5.
To initiate a power-up sequence the Track control must
first pulled to ground potential. This should be done at
or before input power is applied to the modules, and then
held for at least 10 ms thereafter. This brief period gives
the modules time to complete their internal soft-start
initialization, which enables them to produce an output
voltage.
Applying a logic-level high signal to the circuit’s On/Off
Control turns Q
Track control. After completing their internal soft-start
intialization, the output of all modules will remain at zero
volts while Q1 is on. 10 ms after a valid input voltage has
been applied to all modules, Q1 can be turned off. This
allows the track control voltage to automatically rise
toward to the modules' input voltage. During this period
the output voltage of each module will rise in unison with
1
. As an example, if the Track pin of a 2.5-V
3
. For convenience the Track control incor-
on and applies a ground signal to the
1
other modules, to its respective set-point voltage.
Figure 3-6 shows the output voltage waveforms from the
circuit of Figure 3-5 after the On/Off Control is set from a
high to a low-level voltage. The waveforms, Vo
and Vo
1
represent the output voltages from the two power modules, U1 (3.3 V) and U2 (1.8 V) respectively. Vo1 and Vo
are shown rising together to produce the desired simultaneous power-up characteristic.
The same circuit also provides a power-down sequence.
Power down is the reverse of power up, and is accomplished by lowering the track control voltage back to zero
volts. The important constraint is that a valid input voltage
must be maintained until the power down is complete. It
also requires that Q
be turned off relatively slowly. This
1
is so that the Track control voltage does not fall faster than
Auto-Track's slew rate capability, which is 1 V/ms. The
components R1 and C1 in Figure 3-5 limit the rate at
which Q1 can pull down the Track control voltage. The
values of 100 k-ohm and 0.1 µF correlate to a decay rate
of about 0.17 V/ms.
The power-down sequence is initiated with a low-to-high
transition at the On/Off Control input to the circuit.
Figure 3-7 shows the power-down waveforms. As the
Track control voltage falls below the nominal set-point
voltage of each power module, then its output voltage
decays with all the other modules under Auto-Track
control.
Notes on Use of Auto-Track™
1. The Track pin voltage must be allowed to rise above
the module’s set-point voltage before the module can
regulate at its adjusted set-point voltage.
2. The Auto-Track function will track almost any voltage
ramp during power up, and is compatible with ramp
speeds of up to 1 V/ms.
3. The absolute maximum voltage that may be applied to the
Track pin is V
4. The module will not follow a voltage at its Track control
input until it has completed its soft-start initialization.
This takes about 10 ms from the time that the module
has sensed that a valid voltage has been applied its input.
During this period, it is recommended that the Track
pin be held at ground potential.
5. The module is capable of both sinking and sourcing
current when following a voltage at its Track pin.
Therefore startup into an output prebias is not supported
during Auto-Track control.
not necessary when all supply voltages rise simultaneously
under the control of Auto-Track.
6. The Auto-Track function can be disabled by connecting
the Track pin to the input voltage (V
disabled, the output voltage will rise at a quicker and
more linear rate after input power is applied.
.
in
Note: A pre-bias holdoff is
). With Auto-Track
in
2
2
For technical support and further information visit http://power.ti.com
Application Notes
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
Figure 3–5; Sequenced Power Up & Power Down Using Auto-Track
+5 V
On/Off Control
1 = Power Down
0 = Power Up
0 V
R1
100 k
C1
0.1 µF
Q1
BSS138
U1
+
C
IN
U2
V
+
C
IN
98
10
V
PTH05020W
IN
3
10
98
PTH05010W
IN
3
GNDInhibit
GNDInhibit
Track
1
Track
1
5
=3.3 V
Vo
62
V
O
1
+
R
698
4
C
2
5
OUT
Vo2 =1.8 V
62
V
O
7
+
R
3
5k49
4
C
OUT
7
Figure 3–6; Simultaneous Power Up with Auto-Track Control
Vo1 (1 V/Div)
Vo2 (1 V/Div)
On/Off Input
(5 V/Div)
HORIZ SCALE: 10 ms/Div
Figure 3–7; Simultaneous Power Down with Auto-Track Control
Vo1 (1 V/Div)
Vo2 (1 V/Div)
On/Off Input
(5 V/Div)
HORIZ SCALE: 10 ms/Div
For technical support and further information visit http://power.ti.com
Application Notes
(
)
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
Margin Up/Down Controls
The PTHxx060W, PTHxx010W, PTHxx020W, and
PTHxx030W products incorporate Margin Up and Margin
Down control inputs. These controls allow the output
voltage to be momentarily adjusted 1, either up or down,
by a nominal 5 %. This provides a convenient method
for dynamically testing the operation of the load circuit
over its supply margin or range. It can also be used to verify
the function of supply voltage supervisors. The ±5 %
change is applied to the adjusted output voltage, as set by
the external resistor, R
at the Vo Adjust pin.
set
The 5 % adjustment is made by pulling the appropriate
margin control input directly to the GND terminal
2
A low-leakage open-drain device, such as an n-channel
MOSFET or p-channel JFET is recommended for this
3
purpose
. Adjustments of less than 5 % can also be accommodated by adding series resistors to the control inputs.
The value of the resistor can be selected from Table 3-2,
or calculated using the following formula.
Up/Down Adjust Resistance Calculation
To reduce the margin adjustment to something less than
5 %, series resistors are required (See RD and RU in
Figure 3-8). For the same amount of adjustment, the
resistor value calculated for RU and RD will be the same.
The formulas is as follows.
RU or RD=
Where ∆% = The desired amount of margin adjust in
499
∆%
percent.
– 99.8 kΩ
Notes:
1. The Margin Up* and Margin Dn* controls were not
intended to be activated simultaneously. If they are
their affects on the output voltage may not completely
cancel, resulting in the possibility of a slightly higher
error in the output voltage set point.
2. The ground reference should be a direct connection to
the module GND at pin 7 (pin 1 for the PTHxx050).
This will produce a more accurate adjustment at the
load circuit terminals. The transistors Q
and Q2 should
1
be located close to the regulator.
.
3. The Margin Up and Margin Dn control inputs are not
compatible with devices that source voltage. This includes
TTL logic. These are analog inputs and should only be
controlled with a true open-drain device (preferably
a discrete MOSFET transistor). The device selected
should have low off-state leakage current. Each input
sources 8 µA when grounded, and has an open-circuit
voltage of 0.8 V.
Table 3-2; Margin Up/Down Resistor Values
% Adjust RU / R
5 0.0 kΩ
4 24.9 kΩ
3 66.5 kΩ
2 150.0 kΩ
1 397.0 kΩ
D
Figure 3–8; Margin Up/Down Application Schematic
V
IN
RDR
+
C
in
Q
MargDn
MargUp
GND
1
1
2
U
Q
2
10 9 8
PTH05010W
Top View
543
R
SET
0.1 W, 1 %
7
6
+V
o
0V
+V
OUT
+
C
out
GND
L
O
A
D
For technical support and further information visit http://power.ti.com
Application Notes
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
Pre-Bias Startup Capability
Only selected products in the PTH family incorporate this
capability. Consult Table 3-1 to identify which products
are compliant.
A pre-bias startup condition occurs as a result of an external
voltage being present at the output of a power module prior
to its output becoming active. This often occurs in complex digital systems when current from another power
source is backfed through a dual-supply logic component,
such as an FPGA or ASIC. Another path might be via
clamp diodes as part of a dual-supply power-up sequencing
arrangement. A prebias can cause problems with power
modules that incorporate synchronous rectifiers. This is
because under most operating conditions, these types of
modules can sink as well as source output current.
The PTH family of power modules incorporate synchronous rectifiers, but will not sink current during startup
or whenever the Inhibit pin is held low. However, to ensure
satisfactory operation of this function, certain conditions
must be maintained. 2 Figure 3-9 shows an application
demonstrating the pre-bias startup capability. The startup waveforms are shown in Figure 3-10. Note that the
output current from the PTH03010W (Io) shows negligible current until its output voltage rises above that
backfed through diodes D1 and D2.
Note: The pre-bias start-up feature is not compatible with
Auto-Track. When the module is under Auto-Track control,
it will sink current if the output voltage is below that of a
back-feeding source. To ensure a pre-bias hold-off one of two
approaches must be followed when input power is applied to
the module. The Auto-Track function must either be disabled 3,
or the module’s output held off (for at least 50 ms) using the
Inhibit pin. Either approach ensures that the Track pin voltage is above the set-point voltage at start up.
1
Notes
1. Startup includes the short delay (approx. 10 ms) prior
to the output voltage rising, followed by the rise of the
output voltage under the module’s internal soft-start
control. Startup is complete when the output voltage
has risen to either the set-point voltage or the voltage
at the Track pin, whichever is lowest.
2. To ensure that the regulator does not sink current when
power is first applied (even with a ground signal applied
to the Inhibit control pin), the input voltage
be greater than the output voltage
throughout the
power-up and power-down sequence.
3. The Auto-Track function can be disabled at power up
by immediately applying a voltage to the module’s Track
pin that is greater than its set-point voltage. This can
,
be easily accomplished by connecting the Track pin to
.
V
in
Figure 3–10; Pre-Bias Startup Waveforms
HORIZ SCALE: 5 ms/Div
must always
Vin (1 V/Div)
Vo (1 V/Div)
Io (5 A/Div)
Figure 3–9; Application Circuit Demonstrating Pre-Bias Startup
V
= 3.3 V
IN
10
98
Track
V
PTH03010W
IN
GNDInhibit
1
3
+
C
IN
330 µF
5
Sense
62
V
O
Vadj
4
7
R
2
2k21
+
C
330 µF
Vo = 2.5 V
+
I
o
VCORE
OUT
VCCIO
ASIC
For technical support and further information visit http://power.ti.com
Application Notes
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
Remote Sense
The PTHxx060W, PTHxx010W, PTHxx020W, and
PTHxx030W products incorporate an output voltage
sense pin, Vo Sense. The Vo Sense pin should be connected
to V
at the load circuit (see data sheet standard appli-
out
cation). A remote sense improves the load regulation
performance of the module by allowing it to compensate
for any ‘IR’ voltage drop between itself and the load. An
IR drop is caused by the high output current flowing
through the small amount of pin and trace resistance.
Use of the remote sense is optional. If not used, the
Vo Sense pin can be left open-circuit. An internal low-
value resistor (15-Ω or less) is connected between the
Vo Sense and V
in regulation.
With the sense pin connected, the difference between
the voltage measured directly between the V
pins, and that measured from Vo Sense to GND, is the
amount of IR drop being compensated by the regulator.
This should be limited to a maximum of 0.3 V.
Note: The remote sense feature is not designed to compensate
for the forward drop of non-linear or frequency dependent
components that may be placed in series with the converter
output. Examples include OR-ing diodes, filter inductors,
ferrite beads, and fuses. When these components are enclosed
by the remote sense connection they are effectively placed
inside the regulation control loop, which can adversely affect
the stability of the regulator.
. This ensures the output voltage remains
out
and GND
out
For technical support and further information visit http://power.ti.com
PACKAGE OPTION ADDENDUM
www.ti.com
11-Oct-2005
PACKAGING INFORMATION
Orderable Device Status
PTH05030WAD ACTIVE DIP MOD
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
EUM 13 16 Pb-Free
ULE
PTH05030WAH ACTIVE DIP MOD
EUM 13 16 TBD Call TI Level-1-235C-UNLIM
ULE
PTH05030WAS ACTIVE DIP MOD
EUN 13 16 TBD Call TI Level-1-235C-UNLIM
ULE
PTH05030WAST ACTIVE DIP MOD
EUN 13 200 TBD Call TI Level-1-235C-UNLIM
ULE
PTH05030WAZ ACTIVE DIP MOD
EUN 13 16 Pb-Free
ULE
PTH05030WAZT ACTIVE DIP MOD
EUN 13 200 Pb-Free
ULE
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(RoHS)
(RoHS)
(RoHS)
(2)
Lead/Ball Finish MSL Peak Temp
Call TI Level-NC-NC-NC
Call TI Level-3-260C-168 HR
Call TI Level-3-260C-168 HR
(3)
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
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