TEXAS INSTRUMENTS PTH08000W Technical data

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1

5

2

3

4

6

+

+

PTH08000W

(Top View)

Track

GND

R #

1%, 0.05 W

(Required)

SET

Inhibit

C

100 F

(Required)

I

*

µ

C
100 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

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2.25-A, WIDE INPUT, ADJUSTABLE SWITCHING REGULATOR
WITH AUTO-TRACK™ SEQUENCING

PTH08000W

SLTS248 – JUNE 2005

FEATURES

• Up to 2.25-A Output Current at 85°C

• 4.5-V to 14-V Input Voltage Range

• Wide-Output Voltage Adjust

(0.9 V to 5.5 V)

• Efficiencies Up to 94%

• Surface-Mount Package

• Safety Agency Approvals:

UL/CUL 60950, EN60950 VDE (Pending)

APPLICATIONS

• Telecommunications, Instrumentation,

and General-Purpose Circuits

• On/Off Inhibit

• Undervoltage Lockout (UVLO)

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

• Overtemperature Protection

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

DESCRIPTION

The PTH08000W is a highly integrated, low-cost switching regulator module that delivers up to 2.25 A of output
current. The PTH08000W sources output current at a much higher efficiency than a TO-220 linear regulator IC,
eliminating the need for a heatsink. The small size (0.75 inch × 0.5 inch) and flexible operation creates value for
a variety of applications.

The input voltage range of the PTH08000W is 4.5 V to 14 V, allowing operation from either a 5-V or 12-V input
bus. Using state-of-the-art switched-mode power-conversion technology, the PTH08000W can step down to
voltages as low as 0.9 V from a 5-V input bus, with less than 1 W of power dissipation. The output voltage can
be adjusted to any voltage over the range, 0.9 V to 5.5 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. Operating
features include an undervoltage lockout (UVLO), on/off inhibit, overcurrent protection, and overtemperature
protection. Target applications include telecommunications, test and measurement applications, and high-end
consumer products. This product is available in both through-hole and surface-mount package options, including
tape and reel. The PTH08000W is 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

Auto-Track, POLA, 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.

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright © 2005, Texas Instruments Incorporated

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PTH08000W

SLTS248 – JUNE 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

PTH08000 (Basic Model)

Output Voltage Part Number Description Package Designator

PTH08000WAH Horizontal T/H - Pb-free EUS

0.9 V - 5.5 V PTH08000WAS
PTH08000WAZ

(1) (2)
(1) (3)

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 material.
(3) Z suffix versions have SnAgCu solder ball material.

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range unless otherwise noted

T

Operating free-air temperature Over VIrange –40 to 85 °C

A

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)

T

Storage temperature –40 to 125 °C

stg

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

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

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

(2)

Surface temperature of module body or pins 260

(1)

(2)

(3)

EUT
EUT

PTH08000W UNIT

RECOMMENDED OPERATING CONDITIONS

MIN MAX UNIT

V

I

T

A

Input voltage 4.5 14 V
Operating free-air temperature –40 85 °C

PACKAGE SPECIFICATIONS

PTH08000W (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 ms, 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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PTH08000W

SLTS248 – JUNE 2005

ELECTRICAL CHARACTERISTICS

at 25°C free-air temperature, VI= 12 V, VO= 3.3 V, IO= IOmax, CI= 100 µF (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

I

O

V

I

V

O

V

(ADJ)

η Efficiency R

IILtrack Track input current (pin 2) Pin to GND –130 µA
dV

track

UVLO Undervoltage lockout V

II(stby) Input standby current Pins 5 and 2 connected 1 mA
f

S

MTBF Calculated reliability 10.3

Output current TA= 85°C, natural convection airflow 0 2.25 A
Input voltage range Over IOrange 4.5

(1)

14 V
Set-point voltage tolerance TA= 25°C ±2
Temperature variation -40 ≤ TA≤ 85°C ±0.5 %V
Line regulation Over VIrange ±7 mV
Load regulation Over IOrange ±0.13 %V
Total output voltage variation Includes set-point, line, load, -40 ° C ≤ TA≤ 85°C 3
Output Voltage Adjust Range Over IOrange 0.9 5.5 V

R

= 346 Ω, VO= 5 V 93.5%

SET

R

= 1.87 k Ω, VO= 3.3 V 92%

SET

R

= 3.74 k Ω, VO= 2.5 V 90.5%
TA= 25 °C,
IO= 2 A

SET

= 6.19 k Ω, VO= 2 V 89.5%

SET

R

= 8.06 k Ω, VO= 1.8 V 88%

SET

R

= 13 k Ω, VO= 1.5 V 86.5%

SET

R

= 27.4 k Ω, VO= 1.2 V 84.5%

SET

Output voltage ripple 20-MHz bandwidth 40 mV
Overcurrent threshold Reset, followed by autorecovery 3.5 A

CO= 100 µF, 1 Recovery time 50 µs

Transient response

A/µs load step
from 50% to
100% IOmax

VOover/undershoot 100 mV

/dt Track slew rate capability CO≤ CO(max) 1 V/ms

VI= increasing 4.35 4.5
VI= decreasing 3.6 4
Input high voltage (VIH) VI– 0.5 Open

Inhibit control (pin 5) Input low voltage (VIL) –0.2 0.5

Input low current (IIL) –5 µA

Switching frequency Over VIand IOranges 300 kHz
External input capacitance Electrolytic type (CI) 100

(4)

Ceramic type (CO) 220

External output capacitance Nonceramic type (CO) 100

Equivalent series resistance (nonceramic) 10

(7)

(5)

330

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

(2)

(2)

(3)

(6)

%

O

O

%V

O

PP

V

µF

µF

m Ω

106Hr

(1) The minimum input voltage is 4.5 V or (V
(2) 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.

O

. The stated limit is unconditionally met if R

SET

has a

SET

(3) This control pin has an internal pullup to the input voltage VI. If it is left open-circuit, the module operates when input power is applied. A

small, low-leakage (< 100 nA) metal-oxide semiconductor field effect transistor (MOSFET) is recommended for control. See the
Application Information for further guidance.

(4) An external 100-µF electrolytic capacitor is required across the input (VIand GND) for proper operation. Locate the capacitor close to

the module.

(5) An external output capacitor is not required for proper operation. Adding 100 µF of distributed capacitance at the load improves the

transient response.

(6) This is the calculated maximum capacitance. The minimum ESR limitation often results in a lower value. See the capacitor application

information for further guidance.

(7) This is the minimum ESR for all the electrolytic (nonceramic) capacitance. Use 14 m Ω as the minimum when calculating the total

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

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PTH08000W

(Top View)

1

5

2

3

4

6

PTH08000W

SLTS248 – JUNE 2005

PIN ASSIGNMENT

TERMINAL FUNCTIONS

TERMINAL

NAME NO.

GND 1

Track 2 I

V

I

Inhibit 4 I

VOAdjust 5 I resistor should be 100 ppm/°C (or better). The set-point range is from 0.9 V to 5.5 V. The electrical

V

O

I/O DESCRIPTION

This is the common ground connection for the VIand VOpower connections. It is also the 0-V
the Inhibit , VOAdjust, and 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, consult the related application note literature number 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 stability of the

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

reference for

4

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TYPICAL CHARACTERISTICS (5-V INPUT)

50

55

60

65

70

75

80

85

90

95

100

0 0.5 1 1.5 2 2.25

V = 3.3 V

O

VO= 1.5 V

VO= 1.8 V

VO= 1.2 V

VO= 1 V

VO= 0.9 V

Efficiency - %

IO- Output Current - A

V = 2.5 V

O

10

20

30

40

50

0 0.5 1 1.5 2 2.25

V Output Voltage Ripple - mV

O PP

-

IO- Output Current - A

V = 2.5 V

O

V = 1 V

O

V = 0.9 V

O

V = 1.5 V

O

V = 1.2 V

O

V = 3.3 V

O

V = 1.8 V

O

20

30

40

50

60

70

80

90

0 0.5 1 1.5 2 2.25

I

O

- Output Current - A

Airflow

T - Ambient Temperature - C

A

o

Nat Conv

0

0.5

0.6

0.3

0.4

0.2

0.1

0.7

0.8

0.9

1

0 0.5 1 1.5 2 2.25

P - Power Dissipation - W

D

I - Output Current - A

O

V = 3.3 V

O

V = 2.5 V

O

V = 1.8 V

O

V = 1.5 V

O

V = 1.2 V

O

V = 0.9 V

O

V = 1 V

O

EFFICIENCY OUTPUT RIPPLE

vs vs

OUTPUT CURRENT OUTPUT CURRENT

Figure 1. Figure 2.

PTH08000W

SLTS248 – JUNE 2005

(1) (2)

POWER DISSIPATION TEMPERATURE DERATING

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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40

50

60

70

80

90

100

0 0.5 1 1.5 2 2.25

V = 3.3 V

O

VO= 1.5 V

VO= 1.8 V

VO= 1.2 V

VO= 5 V

Efficiency - %

IO- Output Current - A

V = 2.5 V

O

10

25

55

85

40

70

100

0 0.5 1 1.5 2 2.25

V Output Voltage Ripple - mV

O PP

-

I - Output Current - A

O

V = 5 V

O

V = 3.3 V

O

V = 2.5 V

O

V = 1.8 V

O

V = 1.5 V

O

V = 1.2 V

O

20

30

40

50

60

70

80

90

0 0.5 1 1.5 2 2.25

I

O

- Output Current - A

Airflow

T - Ambient Temperature - C

A

o

Nat Conv

0

0.5

0.6

0.3

0.4

0.2

0.1

0.7

0.8

0.9

1

0 0.5 1 1.5 2 2.25

P - Power Dissipation - W

D

I - Output Current - A

O

V = 3.3 V

O

V = 5 V

O

V = 2.5 V

O

V = 1.8 V

O

V = 1.5 V

O

V = 1.2 V

O

PTH08000W

SLTS248 – JUNE 2005

TYPICAL CHARACTERISTICS (12-V INPUT)

EFFICIENCY OUTPUT RIPPLE

vs vs

OUTPUT CURRENT OUTPUT CURRENT

Figure 5. Figure 6.

(1) (2)

POWER DISSIPATION TEMPERATURE DERATING

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