TEXAS INSTRUMENTS PTH04000W Technical data

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1

5

2

3

4

6

+

PTH04000W

(Top View)

Track

GND

R #

1%, 0.1 W

(Required)

SET

Inhibit

C

47 F

(Required)

I

µ

*

C
47 F

(Optional)

O

*

µ

V

I

V

O

GND

STANDARD APPLICATION

* See the Application Information section for capacitor recommendations.

# See the Application Information section for R values.

SET

查询PTH04000W供应商

SLTS247A – JUNE 2005 – REVISED JULY 2005

3-A, 3.3/5-V INPUT, ADJUSTABLE SWITCHING REGULATOR

WITH AUTO-TRACK™ SEQUENCING

PTH04000W

FEATURES

• Up to 3-A Output Current at 85°C

• 3.3-V / 5-V Input Voltage

• Wide-Output Voltage Adjust

• Surface Mount Package

• Safety Agency Approvals:

UL/CUL 60950, EN60950 VDE (Pending)

• Point-of-Load Alliance ( POLA™) Compatible

(0.9 V to 3.6 V)

• Efficiencies Up To 94%

• On/Off Inhibit

APPLICATIONS

• Telecommunications, Instrumentation,

and General-Purpose Circuits

• Undervoltage Lockout (UVLO)

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

• Overtemperature Protection

• Ambient Temperature Range: –40°C to 85°C

DESCRIPTION

The PTH04000W is a highly integrated, low-cost switching regulator module that delivers up to 3 A of output
current. Occupying a small PCB area, the PTH04000W provides output current at a high efficiency and with
minimal power dissipation, thereby eliminating the need for a heat sink. Their small size (0.75 inch × 0.5 inch),
high efficiency, and low cost makes these modules practical for a variety of applications.

The input voltage range of the PTH04000W is from 3 V to 5.5 V, allowing operation from either a 3.3-V or 5-V
input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH04000W can step down to
voltages as low as 0.9 V from a 5-V input bus, with typically less than 1 W of power dissipation. The output
voltage can be adjusted to any voltage over the range, 0.9 V to 3.6 V, using a single external resistor. This series
includes Auto-Track™ sequencing. This feature 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 undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection,
and overtemperature protection. Target applications include telecommunications, test and measurement
applications, and high-end consumer products. The modules are available in both through-hole and sur­face-mount package options, including tape and reel. The PTH04000W is also compatible with TI's roadmap for
RoHS and lead-free compliance.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

POLA, Auto-Track, TMS320 are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

Copyright © 2005, Texas Instruments Incorporated

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PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

These devices have limited built-in ESD protection. The leads should be shorted together or the device
placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

ORDERING INFORMATION

PTH04000W (Basic Model)

Output Voltage Part Number Description Package Designator

PTH04000WAH Horizontal T/H - Pb-free EUS

0.9 V - 3.6 V PTH04000WAS
PTH04000WAZ

(1)
(1)

Horizontal SMD

Horizontal SMD - Pb-free

(1) Add a T suffix for tape and reel option on SMD packages.
(2) S suffix versions have SnPb solder ball
(3) Z suffix versions have SnAgCu solder ball

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range unless otherwise noted

T

A

T

stg

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

(2) Moisture Sensitivity Level (MSL) Rating Level-3-260C-168HR

Operating free-air temperature Over VIrange -40 to 85 °C
Lead temperature (H suffix) 5 seconds 260
Solder reflow temperature (S suffix) Surface temperature of module body or pins 235 °C
Solder reflow temperature (Z suffix)

(2)

Surface temperature of module body or pins 260

Storage temperature -40 to 125 °C

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(1)

(2)

(3)

EUT
EUT

PTH04000W UNIT

(2)

RECOMMENDED OPERATING CONDITIONS

MIN MAX UNIT

V

I

T

A

Input voltage 3 5.5 V
Operating free-air temperature -40 85 °C

PACKAGE SPECIFICATIONS

PTH04000Wx (Suffix AH, AS and AZ)

Weight 1.5 grams

Flammability Meets UL 94 V-O

Mechanical shock Per Mil-STD-883D, Method 2002.3, 1 msec, ½ sine, mounted 500 G

Mechanical vibration Mil-STD-883D, Method 2007.2, 20-2000 Hz 20 G

(1) Qualification limit.

(1)

(1)

2

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PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

ELECTRICAL CHARACTERISTICS

at 25°C free-air temperature, VI= 5 V, VO= 3.3 V, IO= IO(Max), CI= 47 µF (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

5.5 V

150

560

(1)

(3)

(3)

(2)

(4)

(7)

I

O

V

I

V

O(TOL)

Output current TA= 25 ° C, natural convection 0 3
Input voltage range Over IOrange 3

(2)

Set-point voltage tolerance TA= 25°C ±2%
Temperature variation –40 ≤ TA≤ 85°C ±0.5% V

O

Line regulation Over VIrange ±1 mV
Load regulation Over IOrange ±5 mV

Total output voltage variation 3%

V

O(ADJ)

Output voltage adjust range V

Includes set-point, line, load,
–40 ≤ TA≤ 85°C

VI≥ 4.5 V 0.9 3.6
VI< 4.5 V 0.9 VI– 1.1
TA= 25 °C, IO= 2 A

(2)
(2)

92%
89%

η Efficiency R

R

= 475 Ω, VO= 3.3 V

SET

R

= 2.32 k Ω, VO= 2.5 V

SET

= 6.65 k Ω, VO= 1.8 V 86%

SET

R

= 11.5 k Ω, VO= 1.5 V 84%

SET

R

= 26.1 k Ω, VO= 1.2 V 82%

SET

R

= 84.5 k Ω , VO= 1 V 78%

SET

Output voltage ripple 20 MHz bandwith 10 mV
Overcurrent threshold Reset, followed by autorecovery 7 A

1 A/µs load step from 50% to 100% IOmax,

CO= 47 µF

Transient response

Recovery time 70 µs

VOover/undershoot 100 mV
IILtrack Track Input Current (pin 2) Pin to GND –130 µA
dV

/dt Track Slew Rate Capability CO≤ CO(max) 1 V/ms

track

UVLO Undervoltage lockout V

VI= increasing 2.95 3
VI= decreasing 2.7 2.8
Input high voltage (VIH) VI– 0.5 Open

Inhibit control (pin 4) Input low voltage (VIL) –0.2 0.6

Input low current (IIL) 10 µA

I

I (STBY)

F

S

MTBF Calculated reliability 15

Input standby current Pins 4 and 2 connected, pin 2 open 1 mA
Switching frequency Over VIand IOranges 700 kHz
External input capacitance Ceramic type (C1) 47

Ceramic type (C2) 0

External output capacitance

(6)

Nonceramic type (C3) 47
Equivalent series resistance (nonceramic) 4

(5)
(6)

(6)

(8)

Per Telcordia SR-332, 50% stress,
TA= 40°C, ground benign

A

PP

V

µF

µF

m Ω

106Hr

(1) See SOA temperature derating curves to identify maximum output current at higher ambient temperatures.
(2) The minimum input voltage is 3 V or (V

2 V.

(3) The set-point voltage tolerance is affected by the tolerance and stability of R

tolerance of 1% with 100 ppm/°C or better temperature stability.

+ 1.1) V, whichever is greater. A 5-V input bus is recommended for output voltages higher than

O

. The stated limit is unconditionally met if R

SET

SET

(4) This control pin has an internal pullup to the input voltage VI. An external pullup must not be used. If it is left open circuit, the module

operates when input power is applied. A small low-leakage (< 100 nA) MOS field effect transistor (MOSFET) is recommended for
control. See the application information for further guidance.

(5) An external 47-µF ceramic capacitor is required across the input (VIand GND) for proper operation. Locate the capacitor close to the

module.
(6) An external output capacitor is not required for basic operation. Additional capacitance at the load improves the transient response.
(7) This is the calculated maximum capacitance. The minimum ESR limitation often results in a lower value. See the capacitor application

information for further guidance.
(8) This is the minimum ESR for all the electrolytic (nonceramic) capacitance. Use 7 m Ω as the minimum when calculating the total

equivalent series resistance (ESR) using the max-ESR values specified by the capacitor manufacturer.

has a

3

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PTH04000W

(Top View)

1

5

2

3

4

6

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

PIN ASSIGNMENT

TERMINAL FUNCTIONS

TERMINAL

NAME NO.

GND 1

Track 2 I

V

I

Inhibit 4 I

VOAdjust 5 I stability of the resistor should be 100 ppm/°C (or better). The set-point range is from 0.9 V to 3.6 V. The

V

O

I/O DESCRIPTION

This is the common ground connection for the VIand VOpower connections. It is also the 0 V
reference for the Inhibit , the VOAdjust, and the Track control inputs.

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 voltage follows
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 VI.

NOTE: Due to the undervoltage lockout feature, the output of the module cannot follow its own input
voltage during power up. For more information, see the related application report (SLTA054).

3 I The positive input voltage power node to the module, which is referenced to common GND.

The Inhibit pin is an open-collector/drain-negative logic input that is referenced to GND. Applying a
low-level ground signal to this input disables the module's output. 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 produces an output voltage whenever a valid input source is applied.

A 1% resistor must be connected between this pin and GND (pin 1) to set the output voltage of the
module higher than 0.9 V. If left open-circuit, the output voltage defaults to this value. The temperature

electrical specification table gives the standard resistor value for a number of common output voltages.
See the application information for further guidance.

6 O The regulated positive power output with respect to the GND node.

dc

4

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TYPICAL CHARACTERISTICS (5-V INPUT)

50

60

70

80

90

100

0 0.5 1 1.5 2 2.5 3

V = 3.3 V

O

VO= 1.5 V

VO= 1.8 V

VO= 1.2 V

VO= 1 V

Efficiency - %

IO- Output Current - A

V = 2.5 V

O

0

10

20

30

40

50

0 0.5 1 1.5 2 2.5 3

V Output Voltage Ripple - mV

O PP

-

IO- Output Current - A

V = 3.3 V

O

V = 1.5 V

O

0

0.2

0.6

0.4

0.8

1

1.2

0 0.5 1 1.5 2 2.5 3

- Power Dissipation - W

P

D

IO- Output Current - A

V = 2.5 V

O

V = 1 V

O

20

30

40

50

60

70

80

90

0 0.5 1 1.5 2 2.5 3

I

O

- Output Current - A

Airflow:

T - Ambient Temperature - C

A

o

Nat Conv
All V

O

EFFICIENCY OUTPUT RIPPLE

vs vs

OUTPUT CURRENT OUTPUT CURRENT

Figure 1. Figure 2.

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

(1) (2)

POWER DISSIPATION AMBIENT TEMPERATURE

vs vs

OUTPUT CURRENT OUTPUT CURRENT

Figure 3. Figure 4.

(1) The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the

converter. Applies to Figure 1 , Figure 2 , and Figure 3 .
(2) The temperature derating 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 100 mm x 100 mm double-sided PCB with 2 oz. copper.

Applies to Figure 4 .

5

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50

55

60

65

70

75

80

85

90

95

100

0 0.5 1 1.5 2 2.5 3

VO= 2 V

VO= 1.8 V

VO= 1.5 V

VO= 1.2 V

VO= 1 V

VO= 0.9 V

Efficiency - %

IO- Output Current - A

0

10

20

30

40

50

0 0.5 1 1.5 2 2.5 3

V Output Voltage Ripple - mV

O PP

-

IO- Output Current - A

V = 1.2 V

O

V = 0.9 V

O

V = 1.8 V

O

0

0.2

0.6

0.4

0.8

1

1.2

0 0.5 1 1.5 2 2.5 3

- Power Dissipation - W

P

D

IO- Output Current - A

V = 1.8 V

O

V = 0.9 V

O

20

30

40

50

60

70

80

90

0 0.5 1 1.5 2 2.5 3

I

O

- Output Current - A

Airflow:

T - Ambient Temperature - C

A

o

Nat Conv
All V

O

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

OUTPUT CURRENT OUTPUT CURRENT

TYPICAL CHARACTERISTICS (3.3-V INPUT)

(1) (2)

EFFICIENCY OUTPUT RIPPLE

vs vs

Figure 5. Figure 6.

POWER DISSIPATION AMBIENT TEMPERATURE

vs vs

OUTPUT CURRENT OUTPUT CURRENT

Figure 7. Figure 8.

(1) The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the

converter. Applies to Figure 5 , Figure 6 , and Figure 7 .
(2) The temperature derating 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 100 mm x 100 mm double-sided PCB with 2 oz. copper.

Applies to Figure 8 .

6

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R

SET

= 10 k xW

0.891 V

V - 0.9 V

O

- 3.24 kW

V

I

+

GND

GND

1 5

63

4

2

Track

V

I

V

O

V

O

GNDInhibit

V Adj

O

C
47 F

(Required)

I

µ

PTH04000W

C
47 F

(Optional)

O

µ

R

0.05 W
1%

SET

SLTS247A – JUNE 2005 – REVISED JULY 2005

APPLICATION INFORMATION

Adjusting the Output Voltage of the PTH04000W Wide-Output Adjust Power Modules

The V

0.9 V to 3.6 V. The adjustment method requires the addition of a single external resistor, R
connected directly between the V
number of common bus voltages, along with the actual voltage the resistance produces.

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 . Figure 9 shows the placement of the required
resistor.

Adjust control (pin 5) sets the output voltage of the PTH04000W product. The adjustment range is from

O

Adjust and GND pin 1. Table 1 gives the standard external resistor for a

O

PTH04000W

, that must be

SET

Table 1. Standard Values of R

Voltages

V

O

(Required) (Standard Value) (Actual)

(1)

3.3 V

(1)

2.5 V
2 V 4.87 k Ω 1.999 V

1.8 V 6.65 k Ω 1.801 V

1.5 V 11.5 k Ω 1.504 V

1.2 V 26.1 k Ω 1.204 V
1 V 84.5 k Ω 1.001 V

0.9 V Open 0.9 V

(1) The minimum input voltage is 3 V or (V

greater.

R

SET

475 Ω 3.298 V

2.32 k Ω 2.502 V

for Common Output

set

+ 1.1) V, whichever is

O

V

O

(1) A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/°C (or

(2) Never connect capacitors from VOAdjust to either GND or VO. Any capacitance added to the VOAdjust pin affects the

better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 5 and 1
using dedicated PCB traces.

stability of the regulator.

Figure 9. V

Adjust Resistor Placement

O

7

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PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

VORequired R

0.900 Open 1.475 12.3 k Ω 2.55 2.16 k Ω

0.925 353 k Ω 1.50 11.6 k Ω 2.60 2.00 k Ω

0.950 175 k Ω 1.55 10.5 k Ω 2.65 1.85 k Ω

0.975 116 k Ω 1.60 9.49 k Ω 2.70 1.71 k Ω

1.000 85.9 k Ω 1.65 8.64 k Ω 2.75 1.58 k Ω

1.025 68.0 k Ω 1.70 7.90 k Ω 2.80 1.45 k Ω

1.050 56.2 k Ω 1.75 7.24 k Ω 2.85 1.33 k Ω

1.075 47.7 k Ω 1.80 6.66 k Ω 2.90 1.22 k Ω

1.100 41.3 k Ω 1.85 6.14 k Ω 2.95 1.11 k Ω

1.125 36.4 k Ω 1.90 5.67 k Ω 3.00 1.00 k Ω

1.150 32.4 k Ω 1.95 5.25 k Ω 3.05 904 Ω

1.175 29.2 k Ω 2.00 4.86 k Ω 3.10 810 Ω

1.200 26.5 k Ω 2.05 4.51 k Ω 3.15 720 Ω

1.225 24.2 k Ω 2.10 4.19 k Ω 3.20 634 Ω

1.250 22.2 k Ω 2.15 3.89 k Ω 3.25 551 Ω

1.275 20.5 k Ω 2.20 3.61 k Ω 3.30 473 Ω

1.300 19.0 k Ω 2.25 3.36 k Ω 3.35 397 Ω

1.325 17.7 k Ω 2.30 3.12 k Ω 3.40 324 Ω

1.350 16.6 k Ω 2.35 2.90 k Ω 3.45 254 Ω

1.375 15.5 k Ω 2.40 2.70 k Ω 3.50 187 Ω

1.400 14.6 k Ω 2.45 2.51 k Ω 3.55 122 Ω

1.425 13.7 k Ω 2.50 2.33 k Ω 3.60 60 Ω

1.450 13.0 k Ω

Table 2. Calculated Set-Point Resistor Values

SET

VORequired R

SET

VORequired R

SET

8

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PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

CAPACITOR RECOMMENDATIONS for the PTH04000W WIDE-OUTPUT
ADJUST POWER MODULES

Input Capacitor

The minimum required input capacitor(s) is 47-µF of ceramic capacitance, in either an X5R or X7R temperature
tolerance. The ceramic capacitors should be located within 0.5 inch (1,27 cm) of the regulator's input pins.
Electrolytic capacitors can also be used at the input, but only in addition to the required ceramic capacitance.
The minimum ripple current rating for nonceramic capacitors should be at least 200 mA rms. The ripple current
rating of electrolytic capacitors is a major consideration when they are used at the input.

When specifying regular tantalum capacitors for use at the input, a minimum voltage rating of 2 × (maximum dc
voltage + ac ripple) is highly recommended. This is standard practice to ensure reliability. Polymer-tantalum
capacitors are not affected by this requirement.

For improved ripple reduction on the input bus, additional ceramic capacitors can be used to complement the
minimum requirement.

Output Capacitors (Optional)

For applications with load transients (sudden changes in load current), the regulator response benefits from
additional external output capacitance. The recommended output capacitance of 47 µF allows the module to
meet its transient response specification. A high-quality computer-grade electrolytic capacitor should be
adequate.

Electrolytic capacitors should be located close to the load circuit. These capacitors provide decoupling over the
frequency range, 2 kHz to 150 kHz. Aluminum electrolytic capacitors are suitable for ambient temperatures
above 0°C. For operation below 0°C, tantalum or Os-Con-type capacitors are recommended. When using one or
more nonceramic capacitors, the calculated equivalent ESR should be no lower than 4 mΩ (7 m Ω using the
manufacturer's maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in

Table 3 .

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 must be added.
Ceramic capacitors have low ESR and their resonant frequency is higher than the bandwidth of the regulator.
When placed at the output, their combined ESR is not critical as long as the total value of ceramic capacitance
does not exceed 150 µF. Also, to prevent the formation of local resonances, do not exceed the maximum
number of capacitors specified in the capacitor table.

Tantalum Capacitors

Additional 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/T520 capacitors series are suggested over many other tantalum types due
to their rated surge, power dissipation, and ripple current capability. As a caution, many general-purpose
tantalum capacitors have considerably higher ESR and lower ripple current capability. These capacitors are also
less reliable as they have lower power dissipation capability 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 is encountered well before the
maximum capacitance value is reached.

Capacitor Table

The capacitor table, Table 3 , 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 rating
and ESR (at 100 kHz) are critical parameters necessary to insure both optimum regulator performance and long
capacitor life.

9

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PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

Designing for 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 those specified in the data sheet, the selection of output
capacitors becomes more important. Review the minimum ESR in the characteristic data sheet for details on the
capacitance maximum.

Table 3. Recommended Input/Output Capacitors

CAPACITOR CHARACTERISTICS QUANTITY

CAPACITOR VENDOR/

COMPONENT

SERIES

Panasonic WA (SMT) 10 V 120 0.035 Ω 2800 mA 8 × 6,9 1 ≤ 4
FC (SMT) 25 V 47 0.400 Ω 230 mA 8 × 6,2 1 1

Panasonic SL SP-cap(SMT)
United Chemi-con PXA (SMT) 10 V 47 0.031 Ω 2250 mA 6,3 × 5,7 1 1 PXA10VC470MF60TP

FS 10 V 100 0.040 Ω 2100 mA 6,3 × 9,8 1 ≤ 3 10FS100M
LXZ 16 V 100 0.250 Ω 290 mA 6,3 × 11,5 1 1 LXZ16VB101M6X11LL
MVZ (SMT) 16 V 100 0.440 Ω 230 mA 6,3 × 5,7 1 1 MVZ16VC101MF60TP

Nichicon UWG (SMT) 16 V 100 0.400 Ω 230 mA 8 × 6,2 1 1 UWG1C101MCR1GS
F559(Tantalum) 10 V 100 0.055 Ω 2000 mA 7,7 × 4,3 1 ≤ 3 F551A107MN
PM 10 V 100 0.550 Ω 210 mA 6 × 11 1 1 UPM1A101MEH

Sanyo Os-con\ POS-Cap SVP 10 V 68 0.025 Ω 2400 mA 7,3 × 4,3 1 ≤ 3 10TPE68M
(SMT) 6.3 V 47 0.074 Ω 1110 mA 5 × 6 1 ≤ 3 6SVP47M
SP 10 V 56 0.045 Ω 1710 mA 6,3 × 5 1 ≤ 3 10SP56M

AVX Tantalum TPS (SMD)
Kemet T520 (SMD) 10 V 68 0.060 Ω >1200 mA 7,3 L × 5,7 1 ≤ 3 T520V686M010ASE060

AO-CAP 6.3 V 47 0.028 Ω >1100 mA W × 4 H 1 ≤ 3 A700V476M006AT
Vishay/Sprague 594D/595D 10 V 68 0.100 Ω >1000 mA 7,3 L × 6 W 1 ≤ 3 594D686X0010C2T

(SMD) 10 V 68 0.240 Ω 680 mA × 4,1 H 1 ≤ 3 595D686X0010C2T
94SL 16 V 47 0.070 Ω 1550 mA 8 × 5 1 ≤ 3 94SL476X0016EBP

TDK Ceramic X5R (Leaded) 10 V 47 0.005 Ω >1400 mA ≥ 1 ≤ 2 FK22X5R1A476M
TDK Ceramic X5R 6.3 V 22 0.002 Ω >1400 mA 1210 case ≥ 2

Murata Ceramic X5R 6.3 V 22 0.002 Ω >1000 mA 3225 mm ≥ 2
Kemet 6.3 V 22 0.002 Ω >1000 mA ≥ 2

TDK Ceramic X5R 6.3 V 47 0.002 Ω >1400 mA 1210 case ≥ 1 ≤ 2 C3225X5R0J476KT/MT
Murata Ceramic X5R 6.3 V 47 0.002 Ω >1000 mA 3225 mm ≥ 1 ≤ 2 GRM32ER60J476M/6.3
Kemet 6.3 V 47 0.002 Ω >1000 mA ≥ 1 ≤ 2 C1210C476K9PAC

WORKING VALUE SERIES INPUT OUTPUT
VOLTAGE µF RESISTANCE BUS

6.3 V 47 0.018 Ω 2500 mA 7,3 × 4,3 1 ≤ 2 EEFCD0J470R

6.3 V 56 0.009 Ω 3000 mA 7,3 × 4,3 1 ≤ 1 EEFSL0J560R

10 V 47 0.100 Ω 1100 mA 7,3 L × 4,3 1 ≤ 3 TPSD476M010R0100
10 V 47 0.060 Ω > 412 mA W × 4,1 H 1 ≤ 53 TPSB476M010R0500

EQUIVALENT

(ESR)

85°C

MAXIMUM PHYSICAL

RIPPLE SIZE

CURRENT (mm)

(I

)

rms

7,5 L × 4,0

W × 8,0 H

(1)

(2)

BUS

(2)

(2)

(4)

≤ 3 C3225X5R0J226KT/MTGR

(4)

≤ 3 M32ER61J223M

(4)

(1) Check with capacitor manufacturers for availability and lead-free status.
(2) A ceramic capacitor is required on the input. An electrolytic capacitor can be added to the output for improved transient response.
(3) An optional through-hole capacitor available.
(4) A total capacitance of 44 µF is an acceptable replacement for a single 47-µF capacitor.

VENDOR
NUMBER

EEFWA1A121P
EEVFC1E470P

C1210C226K9PAC

(3)

(3)

10

www.ti.com

1

5

6

3

4

+

2

V = 5 V

I

Inhibit

Track

PTH04000W

V Adj

O

V

O

V = 2.5 V

O

2.33 k

0.05 W, 1%

W

V

I

GND

GND

GND

C

I

47 F
(Required)

µ

C

O

47 F
(Optional)

µ

t - Time = 10 ms/div

VO(1 V/div)

V (1 V/div)

I

I

I

(1 A/div)

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

Features of the PTH/PTV Family of Nonisolated, Wide-Output Adjust Power Modules

POLA™ Compatibility

The PTH/PTV family of nonisolated, wide-output adjustable power modules from Texas Instruments are
optimized for applications that require a flexible, high-performance module that is small in size. Each of these
products are POLA™ compatible. POLA-compatible products are produced by a number of manufacturers, and
offer customers advanced, nonisolated modules with the same footprint and form factor. POLA parts are also
ensured to be interoperable, thereby providing customers with true second-source availability.

Soft-Start Power Up

The Auto-Track feature allows the power up of multiple PTH/PTV 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, VI(see Figure 10 ).

Figure 10. Power-Up Application Circuit

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 11. Power-Up Waveform

From the moment a valid input voltage is applied, the soft-start control introduces a short time delay (typically

11

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PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

less than 5 ms) before allowing the output voltage to rise. The output then progressively rises to the module
set-point voltage. Figure 11 shows the soft-start power-up characteristic of the PTH04000W, operating from a
5-V input bus and configured for a 2.5-V output. The waveforms were measured with a 3-A resistive load and the
Auto-Track feature 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 25 ms.

Current Limit Protection

The PTH04000W modules protect against load faults with a continuous current limit characteristic. Under a load
fault condition, the output current cannot exceed the current limit value. Attempting to draw current that exceeds
the current limit value causes the output voltage to be progressively reduced. Current is continuously supplied to
the fault until it is removed. On removal of the fault, the output voltage promptly recovers.

Thermal Shutdown

Thermal shutdown protects the module internal circuitry against excessively high temperatures. A rise in
temperature may be the result of a drop in airflow, a high ambient temperature, or a sustained current limit
condition. If the junction temperature of the internal components exceeds 150°C, the module shuts down. This
reduces the output voltage to zero. The module starts up automatically, by initiating a soft-start power up when
the sensed temperature decreases 10°C below the thermal shutdown trip point.

Output On/Off Inhibit

For applications requiring output voltage on/off control, the PTH04000W power module incorporates an output
on/off Inhibit control (pin 4). The inhibit feature can be used wherever there is a requirement for the output
voltage from the regulator to be turned off.

The power module functions normally when the Inhibit pin is left open-circuit, providing a regulated output
whenever a valid source voltage is connected to Vin with respect to GND.

Figure 12 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit control

has its own internal pullup to VIpotential. An open-collector or open-drain device is recommended to control this
input.

Turning Q1 on applies a low voltage to the Inhibit control pin and disables the output of the module. If Q1 is then
turned off, the module executes a soft-start power-up sequence. A regulated output voltage is produced within
20 ms. Figure 13 shows the typical rise in the output voltage, following the turn off of Q1. The turn off of Q1
corresponds to the rise in the waveform, V

. The waveforms were measured with a 2-A resistive load.

(INH)

12

www.ti.com

+

L

O

A

D

PTH04000W

R

6.65 k

0.05 W, 1%

SET

Ù

V = 5 V

I

V = 1.8 V

O

GND

Track

Inhibit

Inhibit

GND

GND

V Adj

O

V

O

V

I

3

2

5

6

1

4

C1
47 F
(Required)

µ

C
47 F

(Optional)

O

µ

Q1

BSS138

t - Time = 10 ms/div

V (1 V/div)

O

I (500 mA/div)

I

V (10 V/div)

(INH)

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

Figure 12. On/Off Inhibit Control Circuit

Figure 13. Power Up Response From Inhibit Control

Auto-Track™ Function

The Auto-Track function is unique to the PTH/PTV family, and is available with all 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 the TMS320™ DSP
family, microprocessors, and ASICs.

13

www.ti.com

U1

C6

+

U2

C4

0.1 µF

GND

MR

CT

6

5

3

4

1

2

C3

4700 pF

C2

1

5

6

4

GNDInhibit

2

1

5

6

4

GNDInhibit

2

C5

C1

3

3

+

5 V

Track

Track

*Use TPS3808G33 with 3.3-V input modules.

475 W

5.49 kW

V

I

V

I

V

O

V

O

PTH04000W

U3

TPS3808G50*

PTH05050W

V 1 = 3.3 V

O

V 2 = 1.8 V

O

V Adj

O

V Adj

O

0 V

SENSE

RESET

V

CC

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

How Auto-Track™ Works

Auto-Track works by forcing the module output voltage to follow a voltage presented at the Track control pin
This control range is limited to between 0 V and the module set-point voltage. Once the track-pin voltage is
raised above the set-point voltage, the module output remains at its set-point
of a 2.5-V regulator is at 1 V, the regulated output is 1 V. If the voltage at the Track pin rises to 3 V, the regulated
output does not go higher than 2.5 V.

Under Auto-Track control, the regulated output from the module follows the voltage at its Track pin on a
volt-for-volt basis. By connecting the Track pin of a number of these modules together, the output voltages 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
incorporates an internal RC-charge circuit. This operates off the module input voltage to produce a suitable rising
waveform at power up.

(2)

. As an example, if the Track pin

(3)

. For convenience, the Track input

(1)

.

14

Figure 14. Auto-Track Circuit

www.ti.com

t - Time = 400 s/divm

V (1 V/div)

(TRK)

V 1 (1 V/div)

O

V 2 (1 V/div)

O

t - Time = 10 ms/div

V (1 V/div)

(TRK)

V 1 (1 V/div)

O

V 2 (1 V/div)

O

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

Typical Application

The basic implementation of Auto-Track allows for simultaneous voltage sequencing of a number of Auto-Track
compliant modules. Connecting the Track inputs of two or more modules forces their track input to follow the
same collective RC-ramp waveform, and allows their power-up sequence to be coordinated from a common track
control signal. This can be an open-collector (or open drain) device, such as a power-up reset voltage supervisor
IC. See U3 in Figure 14 .

To coordinate a power-up sequence, the Track control must first be pulled to ground potential. This should be
done at or before input power is applied to the modules. The ground signal should be maintained for at least
20 ms after input power has been applied. This brief period gives the modules time to complete their internal
soft-start initialization
that includes a built-in time delay, is an ideal component for automatically controlling the track inputs at power
up.

Figure 14 shows how the TPS3808G50 supply voltage supervisor IC (U3) can be used to coordinate the

sequenced power-up of two 5-V input Auto-Track modules. The output of the TPS3808G50 supervisor becomes
active above an input voltage of 0.8 V, enabling it to assert a ground signal to the common track control well
before the input voltage has reached the module's undervoltage lockout threshold. The ground signal is
maintained until approximately 27 ms after the input voltage has risen above U3's voltage threshold, which is

4.65 V. The 27-ms time period is controlled by the capacitor C3. The value of 4700 pF provides sufficient time
delay for the modules to complete their internal soft-start initialization. The output voltage of each module
remains at zero until the track control voltage is allowed to rise. When U3 removes the ground signal, the track
control voltage automatically rises. This causes the output voltage of each module to rise simultaneously with the
other modules, until each reaches its respective set-point voltage.

Figure 15 shows the output voltage waveforms from the circuit of Figure 14 after input voltage is applied to the

circuit. The waveforms, VO1 and VO2 represent the output voltages from the two power modules, U1 (3.3 V) and
U2 (1.8 V), respectively. VO1 and VO2 are shown rising together to produce the desired simultaneous power-up
characteristic.

The same circuit also provides a power-down sequence. When the input voltage falls below U3's voltage
threshold, the ground signal is reapplied to the common track control. This pulls the track inputs to zero volts,
forcing the output of each module to follow. See Figure 16 . Power-down is normally complete before the input
voltage has fallen below the modules' undervoltage lockout. This is an important constraint. Once the modules
recognize that an input voltage is no longer present, their outputs can no longer follow the voltage applied at their
track input. During a power-down sequence, the fall in the output voltage from the modules is limited by the
Auto-Track slew rate capability.

Figure 15. Simultaneous Power-Up With

Auto-Track Control

(4)

, enabling them to produce an output voltage. A low-cost supply voltage supervisor IC,

Figure 16. Simultaneous Power-Down With

Auto-Track Control

15

www.ti.com

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

Notes on Use of Auto-Track™

1. The Auto-Track function tracks almost any voltage ramp during power up, and is compatible with ramp
speeds of up to 1 V/ms.

2. The Track pin voltage must be allowed to rise above the module set-point voltage before the module
regulates at its adjusted set-point voltage.

3. The absolute maximum voltage that may be applied to the Track pin is the input voltage VI.

4. The module cannot follow a voltage at its track control input until it has completed its soft-start initialization.
This takes about 20 ms from the time that a valid voltage has been applied to its input. During this period, it
is recommended that the Track pin be held at ground potential.

5. The Auto-Track function is disabled by connecting the Track pin to the input voltage (V
disabled, the output voltage rises at a quicker and more linear rate after input power has been applied.

). When Auto-Track is

I

16

PACKAGE OPTION ADDENDUM

www.ti.com

19-Aug-2005

PACKAGING INFORMATION

Orderable Device Status

PTH04000WAH ACTIVE DIP MOD

(1)

Package

Type

Package
Drawing

Pins Package

Qty

Eco Plan

EUS 6 56 TBD Call TI Level-1-235C-UNLIM

ULE

PTH04000WAS ACTIVE DIP MOD

EUT 6 49 TBD Call TI Level-1-235C-UNLIM

ULE

PTH04000WAST ACTIVE DIP MOD

EUT 6 250 TBD Call TI Level-1-235C-UNLIM

ULE

PTH04000WAZ ACTIVE DIP MOD

EUT 6 49 TBD Call TI Call TI

ULE

PTH04000WAZT ACTIVE DIP MOD

EUT 6 250 TBD Call TI Call TI

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.

(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)

(2)

Lead/Ball Finish MSL Peak Temp

(3)

(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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