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 5.5 V

• Highly Efficient Integrated FETs Optimized for

Lower Duty-Cycle Applications

– 36 mΩ (High-Side) and 28 mΩ (Low-Side)

• High Efficiency, Less Than 10 μA at Shutdown

• High Initial Bandgap-Reference Accuracy

• Adjustable Soft Start

• Prebiased Soft Start

• 650-kHz Switching Frequency

• Cycle-by-Cycle Overcurrent Limit

2 Applications

• Wide Range of Applications for Low-Voltage

System

– Digital-TV Power Supply

– High-Definition Blu-ray Disc™ Players

– Networking Home Terminals

– Digital Set-Top Boxes (STB)

3 Description

The TPS54627 device is an adaptive on-time DCAP2

mode synchronous-buck converter. The

TPS54627 enables system designers to complete the

suite of various end-equipment power-bus regulators

with a cost-effective, low-component count, lowstandby

current solution.

The main control loop for the TPS54627 uses the DCAP2

mode control that provides a fast transient

response with no external compensation

components. The TPS54627 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 5.5 V. The device also features an

adjustable soft-start time. The TPS54627 is available

in the 8-pin SO PowerPAD package, and designed to

operate from –40°C to 85°C.