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.