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LR256 Datasheet(PDF) 1 Page - Leshan Radio Company

Part # LR256
Description  Fast 1.2MHz Switching Frequency Requires Only 0.22uF Output Capacitor
PDF  8 Pages
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Manufacturer  LRC [Leshan Radio Company]
Direct Link  http://www.lrc.cn/
Logo LRC - Leshan Radio Company

LR256 Datasheet(HTML) 1 Page - Leshan Radio Company

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LR256 White LED Step-Up Converter
Fast 1.2MHz Switching Frequency
Requires Only 0.22uF Output Capacitor
Inherently Matched LED Current
High Efficiency: 85% Typical
2.5V to 10V VIN ranges
Drives Up to Four series LEDs with a Li-lon cell
Uses Very Tiny Inductors
SOT-25 Package
LR256
is
a
step-up
DC/DC
converter
specifically designed to drive white LED with a
constant current. It can drive two,three,or four
LEDS. It switches at 1.2MHz and use tiny
external components. The output capacitor can
be as small as 0.22uF,which can save space
and cost versus alternative solutions. Feedback
voltage is as low as 95mV.
Absolute maximum ratings
Parameter
symbol
value
unit
Supply Voltage
VIN
10
V
Feedback Voltage
FB
10
V
Switch Voltage
SW
20
V
CE Voltage
VCE
10
V
Operating temperature range
Topr
-25 to +70
℃
Storage temperature range
Rstg
-55 to +150
℃
Junction temperature
Tj
125
℃
Pin name
Description
Symbol
Description
Symbol
1：Switch
SW
5：Supply
Voltage
VIN
2：GND
GND
3：Feedback
FB
4：Start-Up
CE
5
1
2
3
4
1/8
LESHAN RADIO COMPANY, LTD.


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