PL5700中文资料升压DC-DC转换器数据手册Powlicon规格书

描述 Description

The PL5700 adopts constant-on-time (COT) control topology, which provides fast transient response. The 2A gate driver minimizes the power loss of the external MOSFET while allowing the use of a wide variety of standard threshold devices. Additionally, the PL5700 uses pulse-skip mode to improve the efficiency under light loads or no load. The switching frequency could be set to 150kHz, 300kHz, 600kHz or 1200kHz based on different resistor value between FREQ pin and GND pin.  The device also features a programmable soft-start function and VADJ, IADJ pins are used to program output VBUS voltage and output current  limit.Under-voltage lockout (UVLO), soft start (SS), an internal regulated supply, and slope compensation are all provided to minimize the external component count. PL5700 provides voltage control loop, constant current loop. Protection features include hiccup mode for overload protection (OLP), over voltage protection (OVP), and short-circuit protection (SCP).

特性 Features

• 2.8V to 32V Supply Voltage Range
• Integrated 2-A MOSFET Gate Drivers
• External Soft Start (SS)
• Pulse-Skip Mode under Light Loads
• Dynamical programming of Output current and voltage using PWM signal or analog signal
• Adjustable Switching Frequency using resistor
• Frequency dithering for good EMI performance
• Cycle-by-Cycle Peak Current Limit
• Output Average Current Limiting with stable CC loop
• Over-Voltage Protection (OVP)
• Short-Circuit Protection (SCP)
• Over-Temperature Protection (OTP)
• QFN4x4-32 Package