Texas Instruments TPS543A26T Synchronous SWIFT Buck Converter

Texas Instruments TPS543A26T Synchronous SWIFT™ Buck Converter employs an internally compensated, fixed-frequency advanced current mode (ACM) control architecture, which, while continually operating under FCCM, generates output voltages from 0.5V to 7V. The device can provide high efficiency while operating at a switching frequency of up to 2.2MHz. This feature makes the device an excellent choice for designs requiring a small size. The fixed frequency controller can be synchronized to an external clock using the SYNC pin and operates from 500kHz to 2.2MHz. Additional features include selectable soft-start times, a high-accuracy voltage reference, two-wire remote sense, monotonic start-up into pre-biased outputs, adjustable UVLO through the EN pin, selectable current limits, and a full suite of fault protections.

The Texas Instruments TPS543A26T is available in a small 2.5mm × 4.5mm HotRod™ WQFN-FCRLF package.

Features

Integrated 6.5mΩ and 2mΩ MOSFETs
4V to 18V input voltage range
Fixed-frequency, internally compensated, advanced current mode (ACM) control
0.5V to 7V output voltage range
True differential remote sense amplifier (RSA)
Three selectable PWM ramp options to optimize the control loop performance
Five selectable switching frequencies of 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

1ms, 2ms, 4ms, and 8ms selectable soft-start times
Monotonic start-up into pre-biased outputs
Selectable current limits to support 16A and 12A operation
Enable with adjustable input undervoltage lockout
Power-good output monitor
Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
–40°C to 150°C operating junction temperature
2.5mm × 4.5mm, 17-pin WQFN-HR package with 0.5mm pitch
Lead-free (RoHS-compliant), Lead-free (Pb-free) conversion
Pin compatible with the 25A - TPS543B25, 20A - TPS543B22, and 12A - TPS543A22