SDB2F5.pdf
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TYPICAL APPLICATION
The SDB2F5
includes underThe SDB2F5
features automatic shifting to The SDB2F5
operates extends battery life. The SDB2F5
switches at ow power applications. The SDB2F5
The SDB2F5
GENERAL DESCRIPTION
SDB2F5
1
Integrated 0.5Ω Power MOSFET
40μA Quiescent Current
2.5V to 5.5V Input Voltage
1.2MHz Fixed Switching Frequency
Internal 1.5A Switch Current Limit
Adjustable Output Voltage
Internal Compensation
Up to 28V Output Voltage
Automatic Pulse Frequency Modulation
Mode at Light Loads
Over 85% Efficiency
Available in a 5-Pin SOT23-5 Package
OLED Biasing
LCD Bias Supply
White LED Driver
PDAs
Digital Still Cameras
is a constant frequency, 5-pin SOT23
current mode step-up converter intended for small,
l
1.2MHz and allows the use of tiny, low cost
capacitors and inductors 2mm or less in height.
Internal soft-start results in small inrush current
and
from an input voltage as low as 2.5V and can
generate 28V at up to 100mA from a 5V
supply.
pulse frequency modulation mode at light loads.
-voltage lockout,
current limiting, and thermal overload protection to
prevent damage in the event of an output overload.
is available in a small 5-pin SOT-23
package.
Figure 1. Basic Application Circuit
70
75
80
85
90
95
100
0 50 100 150 200
Efficiency(%)
Load Current(mA)
V
OUT
=10V
VIN=3.6V
VIN=4.2V
VIN=5V
SDB2F5
C
OUT
10μF
R1
100k
1%
R2
14k
1%
C
IN
10μF
VIN SW
EN FB
GND
V
IN
V
OUT
L 4.7μH
D
Shouding
FEATURES
APPLICATIONS
1.5A,up to 28V Output 1.2MHz Step-Up Converter
SDB2F5 Ver1.0
www.sdw-tw.com
SHOUDING
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