TPS54525PWPRG4.B中文资料德州仪器数据手册PDF规格书

1 Features

• 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

–63 mΩ (high side) and 33 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 overcurrent limit

• Power good output

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 TPS54525 is an adaptive on-time D-CAP2™

mode synchronous buck converter. The TPS54525

enables system designers to complete the suite

of various end equipment’s power bus regulators

with a cost effective, low component count, low

standby current solution. The main control loop for

the TPS54525 uses the D-CAP2™ mode control

which provides a very fast transient response with no

external compensation components. The TPS54525

also has a proprietary circuit that enables the device

to adopt to both low equivalent series resistance

(ESR) output capacitors, such as POSCAP or SPCAP,

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 and a power good function. The TPS54525

is available in the 14-pin HTSSOP package, and

designed to operate from –40°C to 85°C.