1 Features

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Versatile synchronous buck DC/DC module:

– Integrated MOSFETs, inductor, and controller

– Wide input voltage range: 3 V to 65 V

– Input transient up to 70 V

– Junction temperature range –40°C to +125°C

– 4.5-mm × 3.5-mm × 2-mm overmolded package

– Frequency adjustable from 200 kHz to 2.2 MHz

using the RT pin or an external SYNC signal

• Ultra-high efficiency across the full load range:

– Greater than 85 efficiency at 12 VIN, 3.3-VOUT

– Greater than 85 efficiency at 24 VIN, 5-VOUT

– Ultra-low operating quiescent current at no

load: 4 μA at VIN = 24 V to 3.3-V VOUT

• Optimized for ultra-low EMI requirements:

– Pseudo-random spread spectrum reduces peak

emissions

– Pin selectable FPWM mode for constant

frequency at light loads with MODE/SYNC pin

– FSW synchronization with MODE/SYNC pin

– CISPR11 class B capable

• Output voltage and current options:

– Fixed output variants of 3.3-V or 5-V VOUT

– Adjustable output voltage from 1 V to 13 V

– Pin compatible with TPSM33625

– 600-mA output current (TPSM365R6)

– 300-mA output current (TPSM365R3)

• Inherent protection features for robust design

– Precision enable input and open-drain PGOOD

indicator for sequencing, control, and VIN UVLO

– Overcurrent and thermal shutdown protections

• Create a custom design using the TPSM365Rx

with the WEBENCH® Power Designer

2 Applications

• Factory automation and control

• Building automation

• Test equipment

• Appliances

3 Description

The TPSM365R6 or TPSM365R3 is a 600-mA or

300-mA, 65-V input synchronous step-down DC/DC

power module that combines power MOSFETs,

integrated inductor and boot capacitor in a compact

and easy-to-use 3.5-mm × 4.5-mm × 2-mm, 11-pin

QFN package. The small HotRod™ QFN package

technology enhances the thermal performance and

low EMI. The device features the ultra-low operating

IQ of 4 μA at no load (24 V to 3.3-V VOUT).

The TPSM365Rx is available in two fixed output

voltage option supporting 3.3 V and 5 V, and an

adjustable output voltage option supporting 1-V to

13-V range. The module only requires four external

components for a 3.3-V and 5-V fixed output solution.

The TPSM365Rx is optimized for excellent EMI

performance and space constraint applications.