TEXAS INSTRUMENTS SLTS210B Technical data

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
(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
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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
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)
——m
2.8 10
has a tolerance of 1 %
SET
°C
G’s
A
%V
%
µA
V
V
µF
6
o
o
o
Hrs
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)
)
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.
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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 m 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 m (7 m 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.
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Application Notes
continued
PTH03030W & PTH05030W
Table 1-1: Input/Output Capacitors
)elytS(seireS
:cinosanaP
)laidaR(CF
KF)DMS(
,nocihciN:munimulA
)laidaR(DH
)laidaR(MP
:noc-sO,oynaS
)laidaR(PS
)DMS(PVS
)DMS(AW
)DMS(ES/S
)DMS(SPTV01
:)DMS(temeK
eugarpS-yahsiV
cimareC,KDTR5X)DMS(V3.6
:epyT,rodneVroticapaC
noc-imehCdetinU
)laidaR(nocsO,XF
: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
zHk001ta
elppiR.xaM
C°58@tnerruC
)smrI(
090.0
340.0
060.0
060.0
310.0
010.0
090.0
860.0
350.0
050.0
510.0
210.0
020.0
500.0
540.0
060.0
810.0
510.0
210.0
001.0
510.0
200.0
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
200.0 —esac0121
200.0 —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
22
1 1
1 1
]1[
32
4
1
]1[
5
]1[
5
]1[
53
]1[
2
]1[
53
]2[
5
]2[
5
]2[
3≤
]2[
5
]2[
55
]2[
3≤
]2[
5
]2[
55
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
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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 k 2.502 V 2 V 4.12 k 2.010 V
1.8 V 5.49 k 1.803 V
1.5 V 8.87 k 1.504 V
1.2 V 17.4 k 1.202 V 1 V 36.5 k 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
(Prefd Value) V
set
698 3.309V
12 11
Sense
GND
5
10
R 1 %, 0.1 W
V
SET
O
8, 9
– 2.49 k
(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 k
0.850 158 k
0.875 104 k
0.900 77.5 k
0.925 61.5 k
0.950 50.8 k
0.975 43.2 k
1.000 37.5 k
1.025 33.1 k
1.050 29.5 k
1.075 26.6 k
1.100 24.2 k
1.125 22.1 k
1.150 20.4 k
1.175 18.8 k
1.200 17.5 k
1.225 16.3 k
1.250 15.3 k
1.275 14.4 k
1.300 13.5 k
1.325 12.7 k
1.350 12.1 k
1.375 11.4 k
1.400 10.8 k
1.425 10.3 k
1.450 9.82 k
1.475 9.36 k
1.50 8.94 k
1.55 8.18 k
1.60 7.51 k
1.65 6.92 k
1.70 6.4 k
1.75 5.93 k
1.80 5.51 k
1.85 5.13 k
1.90 4.78 k
1.95 4.47 k
set
Va Req’dR
2.00 4.18 k
2.05 3.91 k
2.10 3.66 k
2.15 3.44 k
2.20 3.22 k
2.25 3.03 k
2.30 2.84 k
2.35 2.67 k
2.40 2.51 k
2.45 2.36 k
2.50 2.22 k
2.55 2.08 k
2.60 1.95 k
2.65 1.83 k
2.70 1.72 k
2.75 1.61 k
2.80 1.51 k
2.85 1.41 k
2.90 1.32 k
2.95 1.23 k
3.00 1.15 k
3.05 1.07 k
3.10 988
3.15 914
3.20 843
3.25 775
3.30 710
3.35 647
3.40 587
3.45 529
3.50 473
3.55 419
3.60 367
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
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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
, 698
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)
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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
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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
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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
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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 k
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 k 4 24.9 k 3 66.5 k 2 150.0 k 1 397.0 k
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
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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
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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- 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
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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.
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Addendum-Page 1
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