1 Features

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? 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 TPSM336x5

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 TPSM336x5 is a 1.5-A or 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 TPSM336x5 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 TPSM336x5 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.