The LP6454 is a high efficiency synchronous buck converter supporting up to 4A output current and low heat. The LP6454 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 LP6454 supports both aluminum polymer capacitors and ceramic capacitors without extra compensation components.The LP6454 integrates PFM (Pulse Frequency Modulation) operation, which helps maintain the system efficiency at light load. The LP6454 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 LP6454 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)
0.765~7
FB电压（V）
0.765
电压精度
±1%
工作频率(Hz)
1.2M
最大输出电流(A)
4
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(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 - 90% efficiency at 4A 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 ◆ RoHS Compliant and 100% Lead (Pb) Free
