The LP6451 is a synchronous buck converter supporting up to 3A output current. The LP6451 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 LP6451 supports both aluminum polymer capacitors and ceramic capacitors without extra compensation components. The LP6451 integrates PFM (Pulse Frequency Modulation) operation, which helps maintain the system efficiency at light load. The LP6451 also integrates multiple protection functions, i.e., over-current protection (OCP), overtemperature protection (OTP), under-voltage lockout (UVLO), and short circuit protection (SCP). The LP6451 is available in a small 6-pin 1.6mmΧ2.9mm SOT23-6 package.
应用
◆ Industrial PC ◆ Network/digital video recorder (NVR/DVR) ◆ TV and TV box ◆ 12V Industrial bus applications
数据参数
数据参数
输入电压(V)
4.2~18
输出电压(V)
0.6~7
FB电压（V）
0.6
电压精度
±1%
工作频率(Hz)
1.2M
最大输出电流(A)
3
输出通道数量
1
工作模式
Syn.
EN控制
Y
轻负载模式
PFM/PWM
产品特征/功能
COT,Internal Soft Start,OCP,SCP,OTP
封装
SOT23-6
特征
特征
◆ Wide input voltage range: 4.2V – 18V ◆ Output voltage range: 0.6V – 7V ◆ High efficiency operation - Integrated an 50-mΩ LS-MOSFET and an 80-mΩ HS- MOSFET - 90% efficiency at 3A 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 ◆ Integrated UVLO, OVP, OCP, SCP, and OTP protections ◆ 1.0ms typical soft-start time ◆ 1.6mm Χ 2.9mm SOT23-6 package ◆ RoHS Compliant and 100% Lead (Pb) Free
