TEXAS INSTRUMENTS SLTS204C Technical data
Auto-Track™
Sequencing
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PTH05010W —5-V Input
15-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Module
NOMINAL SIZE = 1.37 in x 0.62 in
(34,8 mm x 15,75 mm)
Description
The PTH05010 series of non-isolated
power modules are small in size but big on
performance and flexibility. Their high
output current, compact footprint, and
industry-leading features offers system
designers a versatile module for powering
complex multi-processor digital systems.
The series employs double-sided surface
mount construction and provides highperformance step-down power conversion
for up to 15 A of output current from a
5-V input bus voltage. The output voltage of the PTH05010W 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™.
SLTS204C – MAY 2003 – REVISED DECEMBER 2003
Features
• Up to 15-A Output Current
• 5-V Input Voltage
• Wide-Output Voltage Adjust
(0.8 V to 3.6 V)
• Efficiencies up to 96 %
• 160 W/in³ Power Density
• On/Off Inhibit
• Output Voltage Sense
• Pre-Bias Startup
• Margin Up/Down Controls
Auto-Track simplifies the task of supply
voltage sequencing in a power system by
enabling modules to track each other, or
any external voltage, during power up and
power down.
Other operating features include an
on/off inhibit, output voltage adjust (trim),
and margin up/down controls. To ensure
tight load regulation, an output voltage
sense is also provided. A non-latching
over-current trip serves as load fault
protection.
Target applications include complex
multi-voltage, multi-processor systems
that incorporate the industry’s high-speed
DSPs, micro-processors and bus drivers.
• Auto-Track™ Sequencing
• Under-Voltage Lockout
• Output Over-Current Protection
• Operating Temp: –40 to +85 °C
• Safety Agency Approvals:
• Point-of-Load Alliance (POLA)
(Non-Latching, Auto-Reset)
UL 1950, CSA 22.2 950, EN60950
VDE (Pending)
Compatible
Pin Configuration
Pin Function
1 GND
2V
in
3 Inhibit *
4Vo Adjust
5Vo Sense
6V
out
7 GND
8 Track
9 Margin Down *
10 Margin Up *
* Denotes negative logic:
Open = Normal operation
Ground = Function active
Standard Application
Track
Margin Down
Margin Up
V
IN
Inhibit
GND
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1
+
C
IN
470 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 470 µF capacitor
C
= Optional 330 µF capactitor
out
10 9 8
PTH05010
2
(Top View)
543
R
0.1 W, 1 %
(Required)
SET
7
V
+
C
330 µF
(Optional)
OUT
Vo Sense
OUT
GND
L
O
A
D
6
PTH05010W —5-V Input
15-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Module
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.
(PTH05010Hxx)
Package Options
Code Description Pkg Ref.
AH Horiz. T/H (EUH)
AS SMD, Standard
(PTH05010xHH)
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 setpoint range for the output voltage is from 0.8 V to 3.6 V.
The resistor 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
– 0.8 V
V
out
– 2.49 k
SLTS204C – MAY 2003 – REVISED DECEMBER 2003
(1)
(2)
(3)
(EUJ)
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 more information, visit http://power.ti.com
PTH05010 W —5-V Input
15-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Module
SLTS204C – MAY 2003 – REVISED DECEMBER 2003
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 — 500 — G’s
Mechanical Vibration Mil-STD-883D, Method 2007.2 Suffix H — 20 — G’s
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 S — 15 —
Weight — — 5 — 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, Vo =3.3 V, Cin =470 µF, C
a
=0 µF, and Io =Iomax)
out
Characteristics Symbols Conditions Min Typ Max Units
Output Current I
Input Voltage Range V
o
in
0.8 V ≤ Vo ≤ 3.6 V 60 °C, 200 LFM airflow 0 — 15
25 °C, natural convection 0 — 15
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, — — ±3
–40 °C ≤ Ta ≤ +85 °C
=10 A R
o
= 698 Ω Vo = 3.3 V — 95 —
SET
= 2.21 kΩ Vo = 2.5 V — 93 —
R
SET
= 5.49 kΩ Vo = 1.8 V — 91 — %
R
SET
= 8.87 kΩ Vo = 1.5 V — 90 —
R
SET
= 17.4 kΩ Vo = 1.2 V — 88 —
R
SET
R
= 36.5 kΩ Vo = 1.0 V — 86 —
SET
20 MHz bandwidth — 30 — mVpp
Over-Current Threshold Io trip Reset, followed by auto-recovery — 27.5 — A
Transient Response 1 A/µs load step, 50 to 100 % I
t
tr
∆V
Margin Up/Down Adjust ∆V
tr
margin — ± 5 — %
o
C
out
=330 µF
max,
o
Recovery Time — 70 — µSec
Vo over/undershoot — 100 — mV
Margin Input Current (pins 9 /10) IIL margin Pin to GND — – 8
Track Input Current (pin 8) IIL track Pin to GND — — –130
Track Slew Rate Capability dV
Under-Voltage Lockout UVLO V
Inhibit Control (pin3) Referenced to GND
Input High Voltage V
Input Low Voltage V
track
IH
IL
/dt C
≤ C
(max) — — 1 V/ms
out
out
increasing — 4.3 4.45 V
in
Vin decreasing 3.4 3.7 —
Input Low Current IIL inhibit Pin to GND — –130 — µA
Input Standby Current Iin inh Inhibit (pin 3) to GND, Track (pin 8) open — 10 — mA
Switching Frequency ƒ
External Input Capacitance C
External Output Capacitance C
s
in
out
Over Vin and Io ranges 275 300 325 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 tolerance is affected by the tolerance and stability ofR
with 200 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 470 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimum of 700 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) ouput 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)
PTH05010W
(1)
(1)
(2)
(2)
(3)
—µA
(4)
8,250
(4)
(7)
Vin –0.5 — Open
–0.2 — 0.8
(5)
470
——µF
(6)
(8)
——mΩ
5.7 — — 10
has a tolerance of 1 %
SET
°C
A
%V
%V
µA
V
µF
6
o
o
o
Hrs
For technical support and more information, visit http://power.ti.com
)
)
PTH05010W —5-V Input
Typical Characteristics
15-A, 5-V Input Non-Isolated
Wide-Output Adjust Power Module
Characteristic Data; Vin =5 V (See Note A)
Efficiency vs Load Current
100
90
80
70
Efficiency - %
60
50
03691215
Output Ripple vs Load Current
50
40
30
20
Ripple - mV
10
0
03691215
Iout - Amps
Iout - Amps
SLTS204C – MAY 2003 – REVISED DECEMBER 2003
Safe Operating Area; Vin =5 V (See Note B)
Output Voltage =3.3 V
90
V
OUT
3.3 V
2.5 V
2.0 V
1.8 V
1.5 V
1.2 V
1.0 V
V
OUT
3.3 V
2.5 V
2.0 V
1.8 V
1.5 V
1.2 V
1.0 V
80
70
60
50
40
Ambient Temperature (°C)
30
20
03691215
Output Voltage =1 V
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
03691215
Iout (A
Iout (A
Airflow
400LFM
200LFM
100LFM
Nat Conv
Airflow
400LFM
200LFM
100LFM
Nat Conv
Power Dissipation vs Load Current
5
4
3
2
Pd - Watts
1
0
0 3 6 9 12 15
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-layer PCB with 1 oz. copper.
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Application Notes
PTH03010W & PTH05010W
Capacitor Recommendations for the PTH03010 &
PTH05010 Series of Power Modules
Input Capacitor
The recommended input capacitor(s) is determined by
the 470 µF minimum capacitance and 700 mArms minimum ripple current rating.
Ripple current, less than 100 mΩ equivalent series resis-
tance (ESR), and temperature are the major considerations
when selecting input capacitors. Unlike polymer tantalum,
regular tantalum capacitors have a recommended mini-
mum 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
to 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 adequate. These capacitors provide decoupling over the frequency range, 2 kHz
to 150 kHz, and are suitable for ambient temperatures
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 equiva-
lent 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
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/
[1]
may used to complement electrolytic types
[1]
current or the output transient
T510 capacitor series are suggested over many other
tantalum types due to their higher rated surge, power
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 as they have lower power dissipation and surge
current ratings. 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 100 kHz) 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 Output
Capacitors for PTH Products in High-Performance Applications.”
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