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6-A, 3.3-V Input Non-Isolated

Wide-Output Adjust Power Module

Features

• Up to 6-A Output Current

• 3.3-V Input Voltage

• Wide-Output Voltage Adjust

(0.8 V to 2.5 V)

• Efficiencies up to 94 %

• 103 W/in³ Power Density

• On/Off Inhibit

• Pre-Bias Startup

• Under-Voltage Lockout

• Operating Temp: –40 to +85 °C

• Auto-Track™ Sequencing

• Output Over-Current Protection

(Non-Latching, Auto-Reset)

• IPC Lead Free 2

• Safety Agency Approvals:

UL 1950, CSA 22.2 950, EN60950

VDE (Pending)

• Point-of-Load Alliance (POLA)

Compatible

Auto-Track™

Sequencing

Pin Configuration

Pin

Function

1

GND

2

Track

3Vin

4

Inhibit *

5Vo Adjust

6Vout

* Denotes negative logic:

Open

= Normal operation

Ground = Function active

NOMINAL SIZE =

0.87 in x 0.5 in

(22,1 mm x 12,57 mm)

PTH03050W —3.3-V Input

SLTS212C – MAY 2003 – REVISED MAY 2004

Standard Application

Description

The PTH03050 is one of the smallest

non-isolated power modules from Texas

Instruments that features Auto-Track™.

Auto-Track simplifies supply voltage

sequencing in power systems by enabling

modules to track each other, or any other

external voltage, during power up and

power down.

Although small in size (0.87 in

× 0.5 in),

these modules are rated for up to 6 A of

output current, and are an ideal choice in

applications where space, performance,

and a power-up sequencing capability are

important attributes.

The product provides high-performance

step-down conversion from a 3.3-V input

bus voltage. The output voltage of the

PTH03050W can be set to any voltage

Rset = Required to set the output voltage to a value

higher than 0.8 V. (See spec. table for values)

Cin = Required 100 µF

Co1 = Optional 100 µF capacitor

Co2 = Optional 10 µF ceramic capacitor for reduced

output ripple.

over the range, 0.8 V to 2.5 V, using a

single resistor.

Other operating features include an

on/off inhibit, output voltage adjust (trim),

and output over-current protection. For

high efficiency these parts employ a

synchronous rectifier output stage, but a

pre-bias hold-off capability ensures that

the output will not sink current during

startup.

Target applications include telecom,

industrial, and general purpose circuits,

including low-power dual-voltage systems

that use a DSP, microprocessor, ASIC, or

FPGA.

Package options include both through-

hole and surface mount configurations.

V

IN

Inhibit

GND

GND

V

OUT

Track

R

SET

1 %, 0.1 W

(Required)

Co

1

100 µF

Electrolytic

(Optional)

C

IN

100 µF

(Required)

Co

2

10 µF

Ceramic

(Optional)

PTH03050W

(Top View)

1

5

2

3

4

6