AIC1620

Features:

High Efficiency 93% (V_IN=2.4V, V_OUT=3.3V,I_OUT=200mA).
20mA Quiescent Supply Current.
Power-Saving Shutdown Mode (0.1A typical).
Internal Synchronous Rectifier ( no external diode )
Selectable Current Limit for Reduced Ripple ( AIC1622 ).
Low Noise , Anti-Ringing Feature ( AIC1622 )
On-Chip Low Battery Detector.
Low Battery Hysteresis


Application

Palmtop & Notebook Computers.
PDAs
Wireless Phones
Pocket Organizers.
Cameras.
1 to 2-Cell Hand-Held Devices


Pinout




Specifications

Supply Voltage (OUT to GND).............................................................................. 8.0V
Switch Voltage (LX to GND) VOUT.................................................................... + 0.3V
Battery Voltage (Batt to GND) .............................................................................6.0V
SHDN, LBO to GND ..............................................................................................6.0V
LBI, REF, FB, CLSEL to GND VOUT......................................................................+0.3V
Switch Current (LX) ............................................................................-1.5A to +1.5A
Output Current (OUT) ..........................................................................-1.5A to +1.5A
Operating Temperature Range ..........................................................-40°C ~ +85°C
Storage Temperature Range................................................................. -65°C ~150°C


Description

The AIC1620/AIC1621/AIC1622 are high efficiency step up DC-DC converter. The start-up voltage is as low as 0.8V and operate with an input voltage down to 0.7V. Consuming only 20A of quiescent current. These AIC1620/AIC1621/AIC1622  devices offer a built-in synchronous rectifier that reduces size and cost by eliminating the need for an external Schottky diode and improves overall efficiency by minimizing losses.The switching frequency depends on the load and the input voltage can range up to 500KHz.The peak current of the internal switch is fixed at 0.8A (AIC1620), at 0.45A (AIC1621), or is selectable (AIC1622) for design flexibility. Ripple does not exceed the product of the switch current limit and the filter capacitor equivalent series resistance (ESR). The AIC1622 also features a circuit that eliminates noise due to inductor ringing.