深圳市科瑞芯电子有限公司

微源半导体 LP6452ATF SOT563中的18V/2A同步BUCK开关变换器

General Description

The LP6452ATF is a synchronous buck converter supporting up to 2A output current. The LP6452ATF employs an adaptive constant-on-time (COT) control scheme to achieve fast load transient response. The external components are minimized, requiring only one inductor, two resistors, and two capacitors.

The LP6452ATF supports both aluminum polymer capacitors and ceramic capacitors without extra compensation components.

The LP6452ATF integrates PFM (Pulse Frequency Modulation) operation, which helps maintain the system efficiency at light load. The LP6452AT/F also integrates multiple protection functions, i.e., over-current protection (OCP), over-temperature protection (OTP), under-voltage lockout (UVLO), and short circuit protection (SCP).

Features

● Wide input voltage range: 4.2V – 18V

● Output voltage range: Vref – 7V

● High efficiency operation

Integrated an 60-mΩ LS-MOSFET and an 90-mΩ HSMOSFET

91% efficiency at 2A load from 12V to 5V conversion

● Automatic PFM mode at light load

● ±1% Vref accuracy

● Typical 1.2-MHz switching frequency

● COT control scheme with fast load transient response

● Hiccup protection

● Integrated UVLO, OVP, OCP, SCP, and OTP protections

● 1.25ms typical soft-start time

● 1.6mm x 1.6mm SOT563 package

● RoHS Compliant and 100％ Lead (Pb) Free

Applications

● Industrial PC

● Network/digital video recorder (NVR/DVR)

● TV and TV box

● 12V Industrial bus applications