TPQ50551

2.2-MHz Wide Input Nonsynchronous Boost, SEPIC, Flyback Controller

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概述
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概述

The TPQ5055x (TPQ5055, TPQ50551, TPQ50552, or TPQ50553) is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.

The TPQ5055x can start up from a minimum voltage of 3.0 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin exceeds 3.5 V.

The internal VCC regulator also supports the BIAS pin voltage up to 45 V. The switching frequency is programmable with an external resistor from 100 kHz to 2.2 MHz. Switching at 2.2 MHz minimizes allows for a small solution size and fast transient response.

The TPQ5055x features 1.5-A driver capability and a low 100-mV current limit threshold. The device also supports the use of an external VCC supply to improve efficiency. Low operating current and pulse-skipping operation improve efficiency at light loads.

The TPQ5055x has built-in protection features such as cycle-by-cycle current limit, overvoltage protection, input UVLO, and thermal shutdown. Hiccup mode overload protection is available in the TPQ50551 and the TPQ50553. The spread spectrum switching frequency dithering is available in the TPQ50552 and TPQ50553.

The TPQ5055x is available in a small size 3mm x 2mm DFN package.

Status

Production
Rating

Industrial
VIN (V)

3~45
Output (V)

VIN~45
Max Output Current (A)

External FET
Temperature Range (℃)

-40 to +125
Package

DFN3X2-12

开发资源

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