CX8508 データシートの表示（PDF） - Unspecified
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CX8508 Datasheet PDF : 9 Pages
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深圳市诚芯微科技有限公司 ＣＸ８５０８
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameter
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Overvoltage Threshold
Error Amplifier Voltage
Error Amplifier Transconductance
High-Side Switch-On Resistance
Low-Side Switch-On Resistance
High-Side Switch Leakage
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense Transconduc-
tance
Oscillator Frequency
Short Circuit Frequency
Maximum Duty Cycle
Minimum On Time
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage Hys-
terisis
EN Lockout Threshold Voltage
EN Lockout Hysterisis
Input UVLO Threshold Rising
Input UVLO Threshold Hysteresis
Soft-start Current
Soft-start Period
Thermal Shutdown4
Condition
VEN ≤ 0.3V
VEN ≥ 2.6V, VFB = 1.0V
4.75V ≤ VIN ≤ 25V
Δ IC = ±1 0μA
VEN = 0V, VSW = 0V
VFB = 0V
VFB = 0.8V
VEN Rising
VIN Rising
VSS = 0V
CSS = 0.1μF
Min
0.900
350
1.1
2.2
3.80
Typ
0.3
1.3
0.925
1.1
480
800
100
100
1
2.0
0.9
4.0
400
150
90
120
1.5
200
2.5
210
4.20
210
6.5
15
160
Note:
4) Guaranteed by design
Max
3.0
1.5
0.950
10
2.5
450
2.0
2.7
4.40
Units
µA
mA
V
V
V/V
µA/V
mΩ
mΩ
µA
A
A
А/V
KHz
KHz
%
nS
V
mV
V
mV
V
mV
µA
ms
C°
2
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