1 Features

• Configured for a wide range of applications

– 4.5V to 30V input voltage range

– Up to 1A continuous output current

– 0.6V ± 1.5% reference voltage (25°C)

– Supports low drop out mode

• High efficiency

– Integrated 100mΩ and 60mΩ MOSFETs

– Low 2μA shutdown, 26μA quiescent current

– Pulse frequency modulation (PFM) for high light

load efficiency

• Ease of use

– Peak current mode control with internal loop

compensation

– Fixed 1200kHz switching frequency

– Internal 5ms soft start

– Frequency spread spectrum to reduce

electromagnetic interference (EMI)

– Overcurrent protection for both MOSFETs with

hiccup mode protection

– Non-latched protection for over temperature

protection (OTP), overcurrent protection (OCP),

overvoltage protection (OVP), and undervoltage

lockout (UVLO)

– SOT-23 (6) package

2 Applications

• 12V, 24V distributed power-bus supply

• Industry application

– White goods

• Consumer application

– Audio

– Set-top box (STB), digital television (DTV)

– Printer

3 Description

The TPS561300 is a 4.5V to 30V input voltage

range, 1A, synchronous buck converter. The device

includes two integrated switching FETs, internal loop

compensation, and 5ms internal soft start to reduce

component count.

By integrating the MOSFETs and employing the

SOT-23 package, the TPS561300 achieves the high

power density and offers a small footprint on the PCB.

The TPS561300 operates in pulse frequency

modulation for high light load efficiency and reduces

the power loss. The frequency spread spectrum

operation is introduced for EMI reduction.

Cycle-by-cycle current limit in both high-side MOSFET

protects the converter in an overload condition and

is enhanced by a low-side MOSFET freewheeling

current limit which prevents current runaway. Hiccup

mode protection is triggered if the overcurrent

condition has persisted for longer than the present

time.