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Electrical Characteristics (VIN=12V, TA=25°C, unless otherwise specified)
Symbol
VIN
Parameter
Conditions
Min.
4.75
Typ.
‐
Max.
20
Unit
V
Input Voltage
‐
VFB
Feedback Voltage
4.75V ≤ VIN ≤ 20V
0.898 0.925 0.952
V
RDS(ON)1
RDS(ON)2
ISw
Upper Switch On Resistance
Lower Switch On Resistance
Upper Switch Leakage
‐
‐
‐
‐
‐
‐
0.22
10
‐
‐
‐
10
‐
Ω
Ω
uA
A
VEN = 0V, VSW = 0V
ILIM
Current Limit (NOTE 1)
‐
4.5
Current Sense Transconductance Output
Current to Comp Pin Voltage
Error Amplifier Voltage Gain
Error Amplifier Transconductance
Oscillator Frequency
Short Circuit Frequency
Soft‐Start Pin Equivalent Output Resistance
Maximum Duty Cycle
Minimum On Time
EN Shutdown Threshold
Enable Pull Up Current
EN UVLO Threshold Rising
EN UVLO Threshold Hysteresis
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown
GCS
‐
‐
1.95
‐
‐
A/V
V/V
AVEA
GEA
FS
FOSC1
‐
DMAX
tON
‐
‐
‐
‐
ISD
IQ
‐
‐
‐
‐
400
830
400
240
9
550
‐
‐
‐
‐
‐
0.7
‐
2.35
‐
‐
‐
‐
1150 uA/V
‐
‐
‐
‐
‐
1.3
‐
2.65
‐
36
1.3
‐
KHz
KHz
KΩ
%
ns
V
uA
V
mV
uA
mA
oC
VFB = 0V
‐
VFB = 1.0V
‐
ICC＞100uA
VEN = 0V
VIN Rising
‐
VIN ≤0.4V
VEN ≥3V
‐
90
100
1.0
1.0
2.50
210
23
1.1
160
TSD
Notes:
1. Slope compensation changes current limit above 40% duty cycle.
2. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
3. Devices are ESD sensitive. Handling precaution is recommended.
4. The device is not guaranteed to function outside its operating conditions.
5. θJA is measured in the natural convection at TA = 25°C on a high effective four layers thermal conductivity test board of
JEDEC 51‐7 thermal measurement standard.
DS‐RS6507‐02 February, 2010
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ORISTER [ ORISTER CORPORATION ]
