1 Features

? Wide input voltage and output voltage range

– Input voltage range: 2.9 V to 23 V

– Output voltage range: 4.5 V to 25 V

? Programmable peak current limit from 1.5 A to 6 A

? Switching frequency

– TPS61377: 650 kHz

– TPS613771: 1.2 MHz

? High efficiency and power capability

– 6 A peak switching current limit

– Low-side FET: 50 mΩ, High-side FET: 40 mΩ

– Up to 95.3 efficiency at VIN = 9 V, VOUT = 16

V, and IOUT = 2.0 A

– Up to 96.0 efficiency at VIN = 12 V, VOUT = 24

V, and IOUT = 1.5 A

? Extend the system operating time

– Typical 70 μA quiescent current

– Maximum 1.25 μA shutdown current

– Selectable auto PFM and forced PWM mode

? Safety and robust operation features

– Output overvoltage protection

– Cycle-by-cycle overcurrent protection

– Thermal shutdown

? Precise EN/UVLO threshold

? External loop compensation

? 2.5-mm × 2.0-mm HotRod? Lite VQFN package

2 Applications

? 3.3 VIN, 5 VIN to 12 VOUT, 24 VOUT power

conversion

? Industrial power systems

? Appliances

3 Description

The TPS61377 is a high-voltage synchronous boost

converter with a 50-mΩ low-side power switch and

a 40-mΩ high-side rectifier switch to provide a high

efficiency and small size solution. The TPS61377 has

a wide input voltage range of 2.9 V to 23 V and the

output voltage covers up to 25 V with 6-A switching

current capability.

The TPS61377 uses an adaptive constant off-time

peak current control topology to regulate the output

voltage. Under moderate to heavy load condition, the

TPS61377 operates in pulse width modulation (PWM)

mode. At light load, the device has two operating

modes that can be selected via the MODE pin. One is

pulse frequency modulation (PFM) mode to improve

light-load efficiency, and the other is forced PWM

mode to avoid audible noise and other application

problems caused by low switching frequency.

The TPS61377 implements a soft-start function and a

programmable peak switching current limit function.

The TPS61377 also provides output overvoltage

protection, cycle-by-cycle overcurrent protection, and

thermal shutdown protection.

The TPS61377 offers a very small solution size with a

2.5-mm × 2.0-mm HotRod? Lite VQFN package.