AIC1848
Regulated 5V Charge Pump In SOT-23
FEATURES
Regulated ±4% Output Voltage
Output Current: 100mA at V
IN
=3.1V
Input Range: 2.7V to 4.5V
No Inductors Required
Very Low Shutdown Current: <1µA
1.8MHz Switching Frequency
Short-Circuit and Over Temperature Protection
Low Profile Package: SOT-23-6
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, battery-
powered applications.
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
SOT-23-6 package.
TYPICAL APPLICATION CIRCUIT
V
OUT
U1
1-Cell
Li-ion Battery
C
IN
1µF
1 VOUT
2
3
GND
SHDN
AIC1848
C+ 6
VIN
C-
5
4
C
OUT
1µF
R1
R2
R3
C
FLY
1µF
Regulated 5V Output from 2.7V to 4.5V Input
WLED series number: NSPW310BS, V
F
=3.6V, I
F
=20mA
R
=
V
OUT
−
V
F
I
F
C
IN
, C
FLY
, C
OUT
: JMK107BJ105KA, TAIYO YUDEN
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1848P-03 102406
1
AIC [ ANALOG INTERGRATIONS CORPORATION ]
