L6902D

The L6902D is a complete and simple step-down Switching Regulator with adjustable current limit. Based on a voltage-mode structure it integrates a current error amplifier to have a constant voltage and constant current control. By means of an on board current sense resistor and the availability of the current sense pins (both compatible to Vcc and for Cs- compatible with GND too) a current limit programming is very simple and accurate (±5%). Moreover constant current control can be used to charge NiMH and NiCd batteries. The device can be used as a standard DC/DC converter with adjustable current limit (set by using the external sense resistor). The internal robust P-channel DMOS transistor with a typical of 250mΩ assures high efficiency and a minimum dropout even at high output current level. The internal limiting current (latched function) of typical value of 2.5A protects the device from accidental output short-circuit avoiding dangerous loads damage.

• Voltage feed-forward
• Zero load current operation
• Adjustable current limit
• Protection against feedback disconnection
• Thermal shutdown
• Overvoltage and frequency foldback overcurrent protection
• Precise 3.3V (±2%) reference voltage
• 5% Output current accuracy

應用

Power Management, Computers & Computer Peripherals