http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps543b25″>View Datasheet

Texas Instruments TPS543B25 Synchronous SWIFT™ Step-Down Converter

Texas Instruments TPS543B25 Synchronous SWIFT™ Step-Down Converter is a high-efficiency 18V, 25A synchronous buck converter employing an internally compensated, fixed-frequency advanced current mode (ACM) control architecture. The device always operates under FCCM and generates output voltages from 0.5V to 7V. The device can provide high efficiency while working at a switching frequency of up to 2.2MHz, making it optimal for designs requiring a small solution size. The fixed frequency controller can operate from 500kHz to 2.2MHz and be synchronized to an external clock using the SYNC pin. Additional features include a high-accuracy voltage reference, two-wire remote sense, 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. The Texas Instruments TPS543B25 is available in a small 2.5mm × 4.5mm HotRod™ WQFN-FCRLF package.

Features

Fixed-frequency, internally compensated, advanced current mode (ACM) control
Integrated 6.5mΩ and 2mΩ MOSFETs
4V to 18V input voltage range
0.5V to 7V output voltage range
A true differential remote sense amplifier (RSA)
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

1ms, 2ms, 4ms, and 8ms selectable soft-start times
Monotonic start-up into pre-biased outputs
Selectable current limits to support 25A and 20A 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)
Pin compatible with the 20A (TPS543B22), 16A (TPS543A26), and and 12A (TPS543A22)
WEBENCH and SIMPLIS models are available

Applications

Wireless and wired communications infrastructure equipment
Optical and fiber networks

Test and measurement
Medical and healthcare

Texas Instruments TPS543B25 Synchronous SWIFT™ Step-Down Converter

Features

Applications

Functional Block Diagram

husseinkey ELECTRONICS®

COMPANY