LTC3720 - LTC3720是Single Phase VRM8.5 Current Mode Step-Down Controller

LTC3720是LINEAR凌力尔特公司的一款数字可编程的降压型稳压器产品，LTC3720是LTC3720是Single Phase VRM8.5 Current Mode Step-Down Controller，本站介绍了LTC3720的封装应用图解、特点和优点、功能等，并给出了与LTC3720相关的LINEAR元器件型号供参考。

LTC3720 - LTC3720是Single Phase VRM8.5 Current Mode Step-Down Controller - 数字可编程的降压型稳压器 - 电源管理 - 凌力尔特

LTC3720 - Single Phase VRM8.5 Current Mode Step-Down Controller

LTC3720 - Single Phase VRM8.5 Current Mode Step-Down Controller - Linear Technology（凌力尔特）

功能描述

The LTC3720 is a synchronous step-down switching regulator controller for CPU power. An output voltage between 1.05V and 1.825V is selected by a 5-bit code (Intel VRM8.5 VID specification). The controller uses a valley current control architecture to deliver very low duty cycles without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT.

Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference and can assist secondary winding regulation by disabling discontinuous mode operation when the main output is lightly loaded.

Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and optional short-circuit shutdown timer. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit level is also user programmable. Wide supply range allows operation from 4V to 36V at the input.

特点

5-Bit Programmable Output Voltage: 1.05V to 1.825V (VRM8.5)

No Sense Resistor Required

2% to 87% Duty Cycle at 200kHz

tON(MIN) <= 100ns

Supports Active Voltage Positioning

True Current Mode Control

Stable with Ceramic COUT

Dual N-Channel MOSFET Synchronous Drive

Power Good Output Voltage Monitor

Wide VIN Range: 4V to 36V

±1% 0.8V Reference