AIC1848

FEATURES w wVery Low Shutdown Current: <1µA S Regulateda ±4% Output Voltage t Outputa Current: 100mA at V =3.1V D Input Range: 2.7V to 4.5V . No Inductors Required w IN e e h U 4 t m o .c AIC1848 Regulated 5V Charge Pump In SOT-23 DESCRIPTION The AIC1848 charge pump is a micropower charge pump DC/DC converter that produces a regulated output voltage from 2.7V to 4.5V input voltage. Low external-part count (one flying capacitor and two small bypass capacitors) makes the AIC1848 ideal for small, batterypowered applications. 1.8MHz Switching Frequency Short-Circuit and Over Temperature Protection Low Profile Package: SOT-23-6 The AIC1848 operates as a constant frequency mode switched capacitor voltage doubler to APPLICATIONS White LEDs Backlighting SIM Interface Supplies for Cellular Telephones Li-Ion Battery Backup Supplies Local 3V to 5V Conversion Smart Card Readers PCMCIA Local 5V Supplies produce a regulated output and features with thermal shutdown capability and short circuit protection. The AIC1848 is available in a space-saving TYPICAL APPLICATION CIRCUIT 1-Cell Li-ion Battery CIN 1µF w w R= w t a .D U1 1 VOUT GND 2 3 SHDN AIC1848 S a C+ 6 5 4 C- e h SOT-23-6 package. U 4 t e VOUT R1 .c m o COUT 1µF R2 R3 VIN CFLY 1µF Regulated 5V Output from 2.7V to 4.5V Input WLED series number: NSPW310BS, VF=3.6V, IF=20mA VOUT − V F IF CIN, CFLY, COUT: JMK107BJ105KA, TAIYO YUDEN Analog Integrations Corporation Si-Soft Research Center TEL: 886-3-5772...