1 Features

• High efficiency for wide duty cycle and load range

– IQ: 4-μA typical

– 62-mΩ high-side and 22-mΩ low-side RDS(ON)

• 3-mm × 2.8-mm × 1.6-mm MicroSiP™ package

• Up to 3-A continuous output current

• ±0.9 feedback voltage accuracy across temp

(–40°C to 125°C)

• Configurable output voltage options:

– VFB external divider: 0.6 V to 5.5 V

– VSET internal divider: 16 options between 0.4 V

and 5.5 V

• DCS-Control topology with 100 mode

• Flexibility through MODE/S-CONF pin

– 2.5-MHz or 1.0-MHz switching frequency

– Forced PWM or auto (PFM) power save mode

with dynamic mode change option

– Automatic efficiency enhancement (AEE)

– Output discharge on/off

• Highly flexible and easy to use

– Optimized pinout for single-layer routing

– Precise enable input

– Power-good output

– Adjustable soft start and tracking

• No external bootstrap capacitor required

• Create a custom design using the TPSM82903

using the WEBENCH® Power Designer

2 Applications

• Data center and enterprise computing

• Wired networking

• Wireless infrastructure

• Factory automation and control

• Test and measurement

3 Description

The TPSM82903 is a highly efficient, small, and

flexible synchronous step-down DC-DC converter

MicroSiP package module that is easy to use. A

selectable switching frequency of 2.5 MHz or 1.0 MHz

allows the use of small components and provides fast

transient response. The device supports high VOUT

accuracy of ± 1 with the DCS-Control topology. The

wide input voltage range of 3 V to 17 V supports a

variety of nominal inputs, like 12-V supply rails, singlecell

or multi-cell Li-Ion, and 5-V or 3.3-V rails.

The TPSM82903 can automatically enter power save

mode (if auto PFM/PWM is selected) at light loads to

maintain high efficiency. Additionally, to provide high

efficiency at very small loads, the device has a low

typical quiescent current of 4 μA. AEE, if enabled,

provides high efficiency across VIN, VOUT, and load

current. The device includes a MODE/Smart-CONF

input to set the internal/external divider, switching

frequency, output voltage discharge, and automatic

power save mode or forced PWM operation.

The device is available in small 11-pin MicroSiP

package measuring 3.0 mm × 2.8 mm × 1.6 mm with

an integrated 1-μH inductor.