AIC1896
1. 4MHz Thin Package
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 and TSOT-23-6
Package.
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 and TSOT-23-6 package.
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.
APPLICATIONS
White LED Backlight.
OLED Driver.
LCD Bias
TYPICAL APPLICATION CIRCUIT
V
IN
3.3V or
4.2V
C1
4.7µF
AIC1896
6
L
D1
CH521S-30
86
C3
1µF
ZD1
BZV55-B12
11.8V~12.2V
84
82
Efficiency (%)
80
78
76
74
72
70
68
2
4
6
8
IN
LX
1
3
V
IN
=4.2V
V
IN
=3.3V
OFF ON
4
SHDN FB
SS GND
5
2
R2
1KΩ
62
I
LED
R1
C2
0.033µF
L: GTSK-51-150M (15µH)
L: GTSK-51-100M (10µH)
10
12
14
16
18
20
LED Current (mA)
Fig. 1 Li-Ion Powered Driver for three white LEDs
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-1896G-01
121208
1
AIC [ ANALOG INTERGRATIONS CORPORATION ]
