General Description
The GS3661 is a boost topology switching regulator for wide operating voltage applications. It is
built-in driver pin, EXT pin, for connecting to an external N-MOSFET. It is also a high precision
reference (1.25), and precision maximum duty cycle control. The GS3661 have internal soft start
function.
The GS3661 is available in the small footprint SOT23-5L package to fit in space-saving PCB
layout for miscellaneous application fields.
Features
? Wide Supply Voltage Operating Range: 2.4 to 5.5V
? Precision Feedback Reference Voltage: 1.25 V (±2%)
? Shutdown Current: <1 μA
? Internal Fixed PWM frequency: 300KHz
? Internal Soft Start Function :7ms (SS)
? Over Voltage Protection
? Package: SOT23-5L
? Duty Cycle: PWM/PFM Switching Control Circuit (15%~90%)
Applications
? Chargers
? LCD Displays
? Digital Cameras
? Handheld Devices
? Portable Products
Typical Application Circuit