AIC1896
1.4MHz SOT23 Current-Mode Step-Up DC/DC
Converter
FEATURES
Fixed Frequency 1.4MHz Current-Mode PWM
Operation.
Adjustable Output Voltage up to 30V.
Guaranteed 13V/ 200mA Output with 5V Input.
2.5V to 10V Input Range.
Maximum 0.1µA Shutdown Current.
Programmable Soft-Start.
Tiny Inductor and Capacitors are allowed.
Space-Saving SOT-23-6 Package.
APPLICATIONS
White LED Backlight.
OLED Driver.
DESCRIPTION
AIC1896 is a current-mode pulse-width modulation
(PWM), step-up DC/DC Converter. The built-in high
voltage N-channel MOSFET allows AIC1896 for
step-up applications with up to 30V output voltage,
as well as for Single Ended Primary Inductance
Converter (SEPIC) and other low-side switching
DC/DC converter.
The high switching frequency (1.4MHz) allows the
use of small external components. The Soft-Start
function is programmable with an external capacitor,
which sets the input current ramp rate.
The AIC1896 is available in a space-saving
SOT-23-6 package.
TYPICAL APPLICATION CIRCUIT
VIN
3.3V or
4.2V
C1
4.7µF
OFF ON
L D1
CH521S-30
AIC1896
ZD1
BZV55-B12
11.8V~12.2V
6 IN
LX 1
4 SHDN FB 3
SS GND
52
R2
1KΩ
C2
0.033µF
C3
1µF
ILED
R1
62
86
84
82
80
78 VIN=4.2V
76 VIN=3.3V
74
72 L: GTSK-51-150M (15µH)
70 L: GTSK-51-100M (10µH)
68
2 4 6 8 10 12 14 16 18
LED Current (mA)
Fig. 1 Li-Ion Powered Driver for three white LEDs
20
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-1896P-04 010405
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