MCU
     CMOS LDO Linear Regulator
     Dual LDO Linear Regulator
     Bipolar LDO Linear Regulator
     Step-Up DC/DC Converter
     Step-Down DC/DC Converter
     Linear Constant LED Driver
     Charger Pump
     LED Backlight Driver
     LED Screen Driver
     Audio AMPLIFIER
     AC/DC Converter
     AC/DC Converter Supply
     Voltage detector/Reset IC
     Li-ion Battery Charger
     MOSFET
     MOSFET for LED Screen & BJT
ME2179

Descriptionú║
The ME2179 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a timer latch short-circuit protection circuit, a PWM / PFM switching control circuit. With an external low-ON-resistance Nch Power MOS, this product is ideal for applications requiring high efficiency and a high output current.
During light-load, ME2179 Series switches its operation to the PFM control by the PWM / PFM switching control circuit in order to prevent efficiency decline due to the IC operating current. Ceramic capacitors can be used for output capacitor.
Featuresú║
í˝Input voltage range: 1.8 V to 5.5 V
í˝Duty ratio: Built-in PWM/PFM switching control circuit 28% to 85%
í˝oscillator frequencyú║1.2MHz
í˝Reference voltage : 0.6 x (1í└2%) V
í˝ Maximum output current: 2.0A typ. (VDD=3V, Vout=5.0V)
í˝Soft start function: 8ms typ.
í˝Low current consumption: 70Ž╠A typ. at switching off
í˝Shutdown function: Current consumption 1.0Ž╠A max. at shutdown
í˝External parts: Inductor, diode, capacitor, transistor
í˝Timer latch short-circuit protection circuit: Selectable with / without short-circuit protection circuit for each product;
í˝Settable delay time by external capacitor (in the product with short-circuit protection)
í˝UVLO (under-voltage lockout) function: Selectable with UVLO for each product
Applicationsú║
í˝MP3 players, digital audio players
í˝Digital cameras, GPS, wireless transceiver
í˝Portable devices
Nanjing Micro One Electronics Inc. 5th Floor,Building No.1, No.699-8 Xuanwu Road, Xuzhuang software Park,Nanjing
Tel:86-25-84731186    Fax:86-25-84731136 ╦ŇICP▒Ş12033088║┼