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LR256 Datasheet(PDF) 3 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) 3 Page - Leshan Radio Company

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Electrical Characteristics
Tamb = 25
,
℃ V
IN=3V，VCE=3V,unless otherwise specified.
Parameter
Test Conditions / Pins
Min
Type
Max
Unit
Minimum Operating Voltage
2.5
V
Maximum Operating Voltage
10
V
Feedback Voltage
ISW=100mA,
Duty Cycle=66%
86
95
104
mV
FB Pin Bias Current
50
100
200
nA
Supply Current
VCE=0V
1.9
0.1
2.5
1
mA
uA
Switching Frequency
0.8
1.2
1.6
MHz
Maximum Duty Cycle
85
90
%
Switch Current Limit
320
mA
Switch VCESAT
ISW =250mA
350
mV
Switch Leakage Current
VSW=5V
0.01
5
uA
CE Voltage High
1.5
V
CE Voltage Low
0.4
V
CE Pin Bias Current
65
uA
Typical Application
VCC
0
D1
CURRENT
2
1
PIN1(SW)
PIN5(Vin)
Fosc
1k
2
1
PIN2(GND)
PIN3(FB)
PIN4(CE)
R1
R
C2
0.22u
VREF
1
2
2
1
gm
L1
22uH
1
2
HI
SENSE
-
SLOPE
2
1
0
D1
D1
C1
1u
SHUTDOWN
+
D4
1
2
+
PWM
COMP
CONTROL
3/8
LESHAN RADIO COMPANY, LTD.
LR256



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