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AIC1845

Analog Integrations
Part Number AIC1845
Manufacturer Analog Integrations
Description Regulated 5V Charge Pump In SOT-23
Published Jan 26, 2006
Detailed Description FEATURES w wInput Range: 2.7V to 5.0V No Inductors Needed at .D Current: 100mA (V Output w 110mA (V Ultralow Power: ...
Datasheet PDF File AIC1845 PDF File

AIC1845
AIC1845

Overview
FEATURES w wInput Range: 2.
7V to 5.
0V No Inductors Needed at .
D Current: 100mA (V Output w 110mA (V Ultralow Power: IIN = 13µA Regulated 5V ±4% Output Voltage IN =3.
3V) IN =3.
6V) aS e e h U 4 t m o .
c AIC1845 Regulated 5V Charge Pump In SOT-23 DESCRIPTION The AIC1845 is a micropower charge pump DC/DC converter that produces a regulated 5V output.
The input voltage range is 2.
7V to 5.
0V.
Extremely low operating current (13µA typical with no load) and a low external-part count (one 0.
22µF flying capacitor and two small bypass capacitors at VIN and VOUT ) make the AIC1845 ideally suitable for small, battery-powered applications.
Very Low Shutdown Current: <1µA Internal Oscillator: 650KHz Short-Circuit and Overtemperature Protection 6-Pin SOT-23 Package The AIC1845 operates as a PSM (Pulse Skipping Modulation) mode switched capacitor APPLICATIONS White or Blue LED Backlighting SIM Interface Supplies for Cellular Telephones Li-Ion Battery Backup Supplies Local 3V to 5V Conversion Smart Card Readers PCMCIA Local 5V Supplies voltage doubler to produce a regulated output and features with thermal shutdown capability and short circuit protection.
The AIC1845 is available in a 6-pin SOT-23 package.
TYPICAL APPLICATION CIRCUIT 1-Cell Li-ion Battery w w * ** CFLY CIN 2.
2µF w t a .
D U1 1 VOUT GND SHDN AIC1845 2 3 S a C+ 6 5 4 C- e h U 4 t e VOUT .
c m o ** R1 COUT 2.
2µF * * * * VIN 0.
22µF CFLY Regulated 5V Output from 2.
7V to 5.
0V Input WLED series number: NSPW310BS, VF=3.
6V, IF=20mA R1 = VOUT − VF , NWLED: The number of WLED IF × N WLED CIN, COUT: CELMK212BJ225MG (X5R) (0805), TAIYO YUDEN : CEEMK212BJ224KG (X7R) (0805), TAIYO YUDEN Analog Integrations Corporation Si-Soft Research Center TEL: 886-3-5772500 FAX: 886-3-5772510 3A1, No.
1, Li-Hsin Rd.
I, Science Park, Hsinchu 300, Taiwan, R.
O.
C.
w www.
analog.
com.
tw w w .
D a S a t e e h U 4 t m o .
c DS-1845P-03 010405 1 AIC1845 ORDERING INFORMATION AIC1845XXXX PACKING TYPE TR: TAPE & R...


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