描述 Description

The MP2117 is an internally compensated 2.2A synchronous step-down switcher. The operating frequency is internally set at 1.25MHz. MP2117 is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) Battery. The MP2117 can provide up to 2.2A continuous load current from a 2.5V to 6V input voltage. The output voltage can be regulated as low as 0.6V. 100% duty cycle provides low dropout operation that extends operating time in battery-operated systems. The MP2117 features an integrated high side switch and synchronous rectifier for high efficiency. With peak current mode control and internal compensation, the MP2117 can be stabilized with ceramic capacitors and small inductors. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. MP2117 is available in the small 10-pin 3mmx3mm QFN and SOIC-8 packages.

特性 Features

2.2A Output Current
2.5V to 6V Input Range VIN
Internal Power MOSFET Switches
Low Dropout Operation: 100% Duty Cycle
Up to 90% Efficiency
Stable with Ceramic Output Capacitors
1μA Shutdown Current
1.25MHz Switching Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Output Short Circuit Protection
Internal Soft-start
Power On Reset Output
Available in a 10-Pin QFN 3x3mm and 8-pin SOIC Packages

應(yīng)用 Application

DVD+/-RW Drives
LCD TV
PDAs
Portable Instruments