TPS543021中文资料4.5V to 30V input, 3A, 400kHz synchronous buck converter数据手册TI规格书

描述 Description

The PTPS543021 is a 4.5V to 28V input voltage range, 3A 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, the PTPS543021 achieves the high power density and offers a small footprint on the PCB. PTPS543021 has adjustable output by a different FB resistor configuration.

The PTPS543021 operates in PFM (pulse frequency modulation) mode for high light load efficiency and reduces the power loss. The device incorporates spread spectrum for Electromagnetic Interference (EMI) reduction.

Cycle-by-cycle current limit in 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 preset time.

特性 Features

Configured for a wide range of applications

4.5V to 28V input voltage range

Up to 3A continuous output current

–40°C to 150°C junction temperature range

70ns minimum switching on time

±1% tolerance reference voltage (25°C)

Supports low drop out mode

Precision enable



High efficiency

Integrated 75mΩ and 35mΩ MOSFETs

Low 2µA shutdown, 28µA quiescent current

Pulse frequency modulation (PFM) for high light load efficiency



Ease of use

Peak current mode control with internal compensation

Fixed 400kHz switching frequency

Internal 5ms soft start

Frequency spread spectrum to reduce EMI

Overcurrent protection with hiccup mode

Non-latched protection for overtemperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), and undervoltage lockout (UVLO)

SOT-563 package



Create a custom design using the PTPS543021 with the WEBENCH Power Designer