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 1.8 -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 3 A - TPSM843320 6 A
- TPSM843620
• –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
TPSM843820 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 TPSM843820 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.