FEATURES
Input voltage: 2.3 V to 5.5 V Peak efficiency: 95% 3 MHz fixed frequency operation Low quiescent current: 23 μA Ultralow shutdown current: 0.2 μA (typical) VSEL pin for simple dynamic voltage scaling (DVS) 100% duty cycle low dropout mode Internal synchronous rectifier, compensation, and soft start Current overload and thermal shutdown protection Small, 6-ball, 1 mm × 1.5 mm WLCSP package APPLICATIONS
PDAs and palmtop computers Wireless handsets Digital audio portable media players Digital cameras, GPS navigation units Low power portable medical equipment Compact, 800 mA, 3 MHz, Simple DVS, Buck Regulator ADP2147 GENERAL DESCRIPTION
At high output loads, the buck regulator operates in PWM mode. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving the light-load efficiency. The ADP2147 runs on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cells, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources.
Analog Devices
