1 Features

• Fixed-frequency, internally-compensated advanced

current mode (ACM) control

• Small form factor 3.5-mm × 3.5-mm × 1.6-mm, 15-

pin DFM package MicroSiP power module

• High-efficiency, integrated 25-mΩ and 6.5-mΩ

MOSFETs, inductor and basic passives

• 4-V to 18-V input voltage range

• 0.5-V to 5.5 -V output voltage range

• Three selectable PWM ramp options to optimize

the control loop performance

• Five selectable switching frequencies: 500 kHz,

750 kHz, 1 MHz, 1.5 MHz, and 2.2 MHz

• Synchronizable to an external clock

• 0.5-V, ±0.5 voltage reference accuracy over full

temperature range

• Selectable soft-start times: 0.5 ms, 1 ms, 2 ms,

and 4 ms

• Monotonic start-up into pre-biased outputs

• Selectable current limits to support 6-A and 3-A

operation

• Enable with adjustable input undervoltage lockout

• Power-good output monitor

• Output overvoltage, output undervoltage, input

undervoltage, overcurrent, and overtemperature

protection

• Pin-to-pin compatible with 8 A - TPSM843820 3 A

- TPSM843320

• –40°C to 125°C operating junction temperature

2 Applications

• Wireless infrastructure and wired communications

equipment

• Optical and fiber networks

• Test and measurement

• Medical and healthcare

• Aerospace and defense

3 Description

TPSM843620 is a highly efficient, small, and flexible

synchronous step-down DC-DC converter in a

MicroSiP power module package that is easy to use.

The module operates up to 18-V input with fixedfrequencies

that are resistor adjustable by system

designer. The embedded IC is internally compensated

which reduces external components and design size.

The integrated high-frequency capacitor reduces the

transient peak at switching node.

The TPSM843620 module employs an internally

compensated, fixed-frequency advanced current

mode control. The device is capable of providing high

efficiency while running at a switching frequency up to

2.2 MHz. The fixed frequency controller can operate

from 500 kHz to 2.2 MHz and can be synchronized

to an external clock using the SYNC pin. Additional

features include a high accuracy voltage reference,

selectable soft start times, monotonic start-up

into pre-biased outputs, selectable current limits,

adjustable UVLO through the EN pin, and a full suite

of fault protections.