Line Card

ADP2121

 2009-11-09

【Basic Info】

【Product Feature】

* Fixed output voltages: 1.80 V, 1.82 V, 1.85V, 1.875V
* Switching frequency :6 MHz
* Input voltage: 2.3 V to 5.5 V
* Output Current 500mA
* High efficiency is achieved over full-load range
* Quiescent current : 36uA in PFM mode
* Maximun efficiency is 92% in PWM mode
* 3 external components required (0805 Inductor (0.47uH), 0402 capacitor (2.2uF) and 0402 capcitor (4.7uF))
* Excellent stability over a range of load and line conditions and transient response
* 6 Ball WLCSP 1.17mm2
* Internal synchronous rectification
* Internal compentsation
* internal soft-start
* Auto power saving
* Current limit protection
* Undervoltage lockout
* Thermal overload protection

* Input voltage range VIN: 2.3 V to 5.5 V
* Fixed output voltages: 1.82 V
* Operating Temperature Range: -40℃~85℃
* Package Type: 6 Ball WLCSP 1.17mm2
* Quiescient Current: 36 uA
* Oscillator Frequency: 6 MHz
* Topology: Step- Down
* Shutdown: Yes
* Control mode: Voltage
* Maximum output current: 500mA

【Application】

* Mobile phones
* Portable equipment
* Digital audio
* Digital cameras

【Overview】

Allowing the use of single Li+/Li-polymer cell, 3-cell alkaline or Ni-MH cell

The ADP2121 is the industry's first buck regulator to pack 500 mA of output current in a component area of less than 5 mm2 making it an ideal power solution for space-constrained handset devices. The 6 MHz fixed-frequency operation enables ultrasmall ceramic capacitors and multilayer inductors. The device has a peak efficiency of 90% and a no load quiescent current of 30 μA to extend battery life. The extended input range of 2.3 V to 5.5 V makes it compatible with next generation Li+ batteries. Despite its small size and high efficiency, the ADP2121's transient performance is uncompromised—providing excellent stability over a range of load and line conditions.