TPS54294

2A双通道同步降压型切换器，带集成FET （ SWIFTâ ?? ¢ ） 2A Dual Channel Synchronous Step-Down Switcher with Integrated FET SWIFT™

The is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54294 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS54294 use the D-CAP2™ mode control which provides a very fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54294 to maintain high efficiency during lighter load conditions. The TPS54294 is able to adapt to both low equivalent series resistance ESR output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5V to 18V.

The TPS54294 is available in a 4.4mm × 5.0mm 16-pin TSSOP PWP package, and 4mm x 4mm 16-pin VQFN RSA package specified for an ambient temperature range from –40°C to 85°C.

.

D-CAP2 Control Mode

.

Fast Transient Response

.

No External Parts Required For Loop

Compensation

.

Compatible with Ceramic Output

Capacitors

.

Wide Input Voltage Range : 4.5 V to 18 V

.

Output Voltage Range : 0.76V to 7.0V

.

Highly Efficient Integrated FETs Optimized

for Low Duty Cycle Applications

.

150 mΩ High Side and 100 mΩ

Low Side

.

High Initial Reference Accuracy

.

Low-Side rDSon Loss-Less Current

Sensing

.

Fixed Soft Start : 1.0ms

.

Non-Sinking Pre-Biased Soft Start

.

Powergood

.

700 kHz Switching Frequency

.

Cycle-by-Cycle Over-Current Limit Control

.

OCL/OVP/UVP/UVLO/TSD Protections

.

Adaptive Gate Drivers with Integrated Boost PMOS Switch

.

OCP Constant Due To Thermally Compensated rDSon

with 4000ppm/℃

.

16-Pin HTSSOP, 16-Pin VQFN

.

Auto-Skip Eco-mode — for High Efficiency at Light Load