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Texas Instruments TPS543320 3A Synchronous Buck Converter

Texas Instruments TPS543320 3A Synchronous Buck Converter employs an internally-compensated, fixed-frequency Advanced Current Mode control. It is capable of providing high efficiency while running at a switching frequency of up to 2.2MHz. The Texas Instruments TPS543320 is in a small 2.5mm × 3mm HotRod™ VQFN package, which, coupled with high efficiency at high frequency, makes it optimal for designs requiring a small solution size. The fixed frequency controller can operate from 500kHz to 2.2MHz. It can be synchronized to an external clock using the SYNC pin. Additional features include a high accuracy voltage reference, selectable soft-start times, monotonic start-up into pre-biased outputs, selectable current limits, adjustable UVLO through the EN pin and a full suite of fault protections.

Features

Fixed-frequency, internally-compensated advanced current mode (ACM) control
Integrated 25mΩ and 13.9mΩ MOSFETs
4V to 18V input voltage range
0.5V to 5.5V output voltage range
Three selectable PWM ramp options to optimize the control loop performance
Five selectable switching frequencies (500kHz, 750kHz, 1MHz, 1.5MHz, and 2.2MHz)
Synchronizable to an external clock
0.5V, ±0.5% voltage reference accuracy over the full temperature range

Selectable soft-start times (0.5ms, 1ms, 2ms, and 4ms)
Monotonic start-up into pre-biased outputs
Selectable current limits to support 3A and 2A operation
Enable with adjustable input undervoltage lockout
Power good output monitor
Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
Pin-to-pin compatible with TPS543820 and TPS543620
–40°C to 150°C operating junction temperature
2.5mm × 3mm, 14-pin VQFN-HR package with 0.5mm pitch

Applications

Wireless infrastructure and wired communications equipment
Optical and fiber networks

Test and measurement
Medical and healthcare

Texas Instruments TPS543320 3A Synchronous Buck Converter

Features

Applications

Functional Block Diagram

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