説明

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 input voltage 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.

 

特徴

• 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

 

アプリケーション

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

 

概要

The TPSM63603 is an easy-to-use, synchronous buck, DC-DC power module that operates from a 3-V to 36-V supply voltage. The device is intended for step-down conversions from 5-V, 12-V, and 24-V supply rails. With an integrated power controller, inductor, and MOSFETs, the TPSM63603 delivers up to 3-A DC load current, with high efficiency and ultra-low input quiescent current, in a very small solution size. Although designed for simple implementation, this device offers flexibility to optimize its usage according to the target application. Control-loop compensation is not required, reducing design time and external component count.
With a programmable switching frequency from 200 kHz to 2.2 MHz using its RT pin or an external clock signal, the TPSM63603 incorporates specific features to improve EMI performance in noise-sensitive applications:
• An optimized package and pinout design enables a shielded switch-node layout that mitigates radiated EMI
• Parallel input and output paths with symmetrical capacitor layouts minimize parasitic inductance, switchvoltage ringing, and radiated field coupling
• Pseudo-random spread spectrum (PRSS) modulation in the TPSM63603S reduces peak emissions
• Clock synchronization and FPWM mode enable constant switching frequency across the load current range
• Integrated power MOSFETs with enhanced gate drive control enable low-noise PWM switching
• Adjustable switch-node slew rate, which allows optimization of EMI at higher frequency harmonics
The TPSM63603 module also includes inherent protection features for robust system requirements:
• An open-drain PGOOD indicator for power-rail sequencing and fault reporting
• Precision enable input with hysteresis, providing
– Programmable line undervoltage lockout (UVLO)
– Remote ON/OFF capability
• Internally fixed output-voltage soft start with monotonic startup into prebiased loads
• Hiccup-mode overcurrent protection with cycle-by-cycle peak and valley current limits
• Thermal shutdown with automatic recovery.
These features enable a flexible and easy-to-use platform for a wide range of applications. The pin arrangement is designed for simple layout, requiring few external components.