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.