1 Features

• Versatile synchronous buck DC/DC module:

– Integrated MOSFETs, inductor, CBOOT capacitor

and controller

– Wide input voltage range: 3 V to 36 V

– Input transient protection up to 40 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

• Ultra-high efficiency across the full load range:

– Greater than 88 efficiency at 12 V VIN,

5-V VOUT,1 MHz, IOUT = 2.5 A

– Greater than 87 efficiency at 24 VIN,

5-VOUT, 1 MHz, IOUT = 2.5 A

– As low as 1.5-μA standby IQ at 13.5 VIN

• Optimized for ultra-low EMI requirements:

– Dual random spread spectrum - DRSS

– Flip-chip on lead package - FCOL

– Inductor and boot capacitor integration

– CISPR 11, Class B compliant-capable

• Output voltage and current options:

– Adjustable output voltage from 1 V to 15 V

• Create a custom design using the TPSM33625

with the WEBENCH® Power Designer

• Suitable for scalable power supplies:

– Pin compatible with:

• TPSM365R6 (65 V, 600 mA)

2 Applications

• Factory automation

• Test and measurement

• Grid infrastructure

3 Description

The TPSM33625 is a 2.5-A, 36-V input synchronous

step-down DC/DC power module that combines flip

chip on lead (FCOL) packaging, 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,

ensuring high ambient temperature operation. In

addition, in conjuction with spread spectrum, the

device provides excellent EMI performance. Devices

can be configured for 1-V up to 15-V output with a

feedback divider and operated .

The TPSM33625 is specifically designed to meet low

standby power requirements for always on, industrial

applications. Auto mode enables frequency foldback

when operating at light loads, allowing a no load

current consumption of 1.5 μA at 13.5-V VIN and high

light load efficiency. A seamless transition between

PWM and PFM modes along with low MOSFET ON

resistances provide exceptional efficiency across the

entire load range.

The TPSM33625 uses peak current mode

architecture with internal compensation to maintain

stable operation with minimal output capacitance.

DRSS is used to reduce the external components

of the input EMI filter. The RT pin variant can be

used to synchronize or set the frequency between 200

kHz and 2.2 MHz to avoid noise sensitive frequency

bands.