TPS54528DDA.B中文资料德州仪器数据手册PDF规格书

1 Features

1• D-CAP2™ Mode Enables Fast Transient

Response

• Low Output Ripple and Allows Ceramic Output

Capacitor

• Wide VIN Input Voltage Range: 4.5 V to 18 V

• Output Voltage Range: 0.76 V to 6 V

• Highly Efficient Integrated FETs Optimized

for Lower Duty Cycle Applications

– 65 mΩ (High Side) and 36 mΩ (Low Side)

• High Efficiency, less than 10 μA at shutdown

• High Initial Bandgap Reference Accuracy

• Adjustable Soft Start

• Pre-Biased Soft Start

• 650-kHz Switching Frequency (fSW)

• Cycle By Cycle Over Current Limit

• Auto-Skip Eco-mode™ for High Efficiency at Light

Load

2 Applications

• Wide Range of Applications for Low Voltage

System

– Digital TV Power Supply

– High Definition Blu-ray Disc™ Players

– Networking Home Terminal

– Digital Set Top Box (STB)

3 Description

The TPS54528 is an adaptive on-time D-CAP2™

mode synchronous buck converter. The TPS54528

enables system designers to complete the suite of

various end-equipment power bus regulators with a

cost effective, low component count, low standby

current solution. The main control loop for the

TPS54528 uses the D-CAP2™ mode control that

provides a 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

TPS54528 to maintain high efficiency during lighter

load conditions. The TPS54528 also has a proprietary

circuit that enables the device to adopt to both low

equivalent series resistance (ESR) output capacitors,

such as POSCAP or SP-CAP, and ultra-low ESR

ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be

programmed between 0.76 V and 6 V. The device

also features an adjustable soft start time. The

TPS54528 is available in the 8-terminal DDA

package, and designed to operate from –40°C to

85°C.