1 Features
• Versatile synchronous buck DC/DC module
– Integrated MOSFETs, inductor, and controller
– Wide input voltage range of 3 V to 36 V
– Adjustable output voltage from 1 V to 16 V
– 4-mm × 6-mm × 1.8-mm overmolded package
– –40°C to 125°C junction temperature range
– Frequency adjustable from 200 kHz to 2.2 MHz
using the RT pin or an external SYNC signal
– Negative output voltage capability
• Ultra-high efficiency across the full load range
– 93% peak efficiency at 12 VIN, 5 VOUT,1 MHz
– External bias option for improved efficiency
– Shutdown quiescent current of 0.6 μA (typical)
• Ultra-low conducted and radiated EMI signatures
– Low-noise package with dual input paths and
integrated capacitors reduces switch ringing
– Spread-spectrum modulation (S suffix)
– Resistor-adjustable switch-node slew rate
– Constant-frequency FPWM mode of operation
– Meets CISPR 11 and 32 class B emissions
• Suitable for scalable power supplies
– Pin compatible with the TPSM63602 (36 V, 2 A)
• 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 TPSM63603
with the WEBENCH® Power Designer

2 Applications
• Test and measurement, aerospace and defense
• Factory automation and control
• Buck and inverting buck-boost power supplies

3 Description
The TPSM63603 synchronous buck power module
is a highly integrated 36-V, 3-A DC/DC solution that
combines power MOSFETs, a shielded inductor, and
passives in an Enhanced HotRod™ QFN package.
The module has pins for VIN and VOUT located at the
corners of the package for optimized input and output
capacitor layout placement. Four larger thermal pads
beneath the module enable a simple layout and easy
handling in manufacturing.
With an output voltage from 1 V to 16 V, the
TPSM63603 is designed to quickly and easily
implement a low-EMI design in a small PCB footprint.
The total solution requires as few as four external
components and eliminates the magnetics and
compensation part selection from the design process.
Although designed for small size and simplicity
in space-constrained applications, the TPSM63603
module offers many features for robust performance:
precision enable with hysteresis for adjustable inputvoltage
UVLO, resistor-programmable switch node
slew rate and spread spectrum option for improved
EMI, integrated VCC, bootstrap and input capacitors
for increased reliability and higher density, constant
switching frequency over the full load current range,
and a PGOOD indicator for sequencing, fault
protection, and output voltage monitoring.