The LP6453X is a high efficiency synchronous buck converter supporting up to 3A output current and low heat. The LP6453X employs an adaptive constant-on-time (COT) control scheme to achieve fast load transient response and without external compensation. The external components are minimized, requiring only one inductor, two resistors, and two capacitors.The LP6453X supports both aluminum polymer capacitors and ceramic capacitors without extra compensation components. The LP6453/LP6453T/LP6453A integrates PFM (Pulse Frequency Modulation) operation, which helps maintain the system efficiency at light load. The LP6453AF integrates FPWM (Forced PWM) operation, which helps achieve very small output ripple over all load range. The LP6453X also integrates multiple protection functions, i.e., over-current protection (OCP), over-temperature protection (OTP), under-voltage lockout (UVLO), and short circuit protection (SCP).The LP6453X is available in a small 6-pin 1.6mmΧ2.9mm SOT23-6 package or 1.6mmΧ1.6mm SOT563 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)
0.768-7
FB电压（V）
0.768
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
FCCM
产品特征/功能
COT,Internal Soft Start,OCP,SCP,OTP
封装
SOT23-6(FC)
特征
特征
◆ Wide input voltage range: 4.2V – 18V ◆ Output voltage range: Vref – 7V ◆ High efficiency operation - Integrated an 33-mΩ LS-MOSFET and an 55-mΩ HS-MOSFET - 92% efficiency at 3A load from 12V to 5V conversion ◆ Constant-on time (COT) control with fast transient response. ◆ ±1% Vref accuracy ◆ Typical 1.2-MHz switching frequency ◆ Startup from Pre-biased output voltage ◆ 1.0ms typical soft-start time ◆ Integrated UVLO, OVP, OCP, SCP, and OTP protections ◆ 1.6mm Χ 2.9mm SOT23-6 package and 1.6mm Χ 1.6mm SOT563 package ◆ RoHS Compliant and 100% Lead (Pb) Free
