The LTC3703IGN-5 is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The LTC3703IGN-5 drives external N-channel MOSFETs using a constant frequency (up to 600kHz), voltage mode architecture.
A precise internal reference provides 1% DC accuracy. A high bandwidth error amplifier and patented line feed forward compensation provide very fast line and load transient response. Strong 1Ω gate drivers allow the LTC3703IGN-5 to drive multiple MOSFETs for higher current applications. The operating frequency is user programmable from 100kHz to 600kHz and can also be synchronized to an external clock for noise-sensitive applications. Current limit is programmable with an external resistor and utilizes the voltage drop across the synchronous MOSFET to eliminate the need for a current sense resistor. For applications requiring up to 60V operation with logiclevel MOSFETS, refer to the LTC3703-5 data sheet.
LTC3703-5LTC3703Maximum VIN60V100VMOSFET Gate Drive4.5V to 15V9.3V to 15VVCC UV+3.7V8.7VVCC UV-3.1V6.2VFeature
- High Voltage Operation: Up to 100V
- Large 1Ω Gate Drivers
- No Current Sense Resistor Required
- Step-Up or Step-Down DC/DC Converter
- Dual N-Channel MOSFET Synchronous Drive
- Excellent Line and Load Transient Response
- Programmable Constant Frequency: 100kHz to 600kHz
- ±1% Reference Accuracy
- Synchronizable up to 600kHz
- Selectable Pulse Skip Mode Operation
- Low Shutdown Current: 50µA Typ
- Programmable Current Limit
- Undervoltage Lockout
- Programmable Soft-Start
- 16-Pin Narrow SSOP and 28-Pin SSOP Packages
Applications
- 48V Telecom and Base Station Power Supplies
- Networking Equipment, Servers
- Automotive and Industrial Control
(Picture: Pinout)
