MIC2297(2005) データシートの表示（PDF） - Micrel
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MIC2297 Datasheet PDF : 12 Pages
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Micrel, Inc.
MIC2297
Absolute Maximum Rating (1)
Supply voltage (VIN)........................................................12V
Switch voltage (VSW) ........................................ -0.3V to 50V
Enable pin voltage (VEN)....................................... -0.3 to VIN
FB Voltage (VFB)...............................................................6V
VBRT ..................................................................................6V
Switch Current (ISW) .........................................................3A
Ambient Storage Temperature (TS)............-65°C to +150°C
ESD Rating (3)................................................................ 2KV
Operating Range (2)
Supply Voltage (VIN).......................................... 2.5V to 10V
Maximum Output Voltage (VOUT)....................................40V
Junction Temperature Range (TJ)..............-40°C to +125°C
Package Thermal Impedance
θJA 2.5mm x2.5mm MLF™-10L lead .................65°C/W
Electrical Characteristics
TA=25oC, VIN =VEN = 3.6V, VOUT = 30V, IOUT = 20mA, unless otherwise noted. Bold values indicate -40°C ≤ TJ ≤ 125°C.
Symbol Parameter
Condition
Min Typ Max
VIN
VUVLO
IVIN
ISD
VFB
Supply Voltage Range
Under-Voltage Lockout
Quiescent Current
Shutdown Current
Feedback Voltage
VFB = 200mV (not switching)
VEN = 0V(4)
(+/-5%)
(+/±6.5%) (Over Temp)
2.5
10
1.8
2.1
2.4
4
7
0.1
1
190
200
200
187
213
IFB
Feedback Input Current
VFB = 200mV
-450
Line Regulation
2.5V ≤ VIN ≤ 4.5V
0.5
1
Load Regulation
5mA ≤ IOUT ≤ 20mA
0.5
DMAX
Maximum Duty Cycle
93
ISW
Switch Current Limit
VSW
Switch Saturation Voltage
ISW
Switch Leakage Current
VEN
Enable Threshold
VIN 2.5V
VIN = 2.5V, ISW = 0.5A
VEN = 0V, VIN = 10V
TURN ON
TURN OFF
1.2
1.7
2.5
220
0.01
1
1.5
0.4
IEN
VREF
fSW
VOVP
Enable Pin Current
Brightness Control Accuracy
Oscillator Frequency
Over Voltage protection
VEN = 10V
20
40
VBRT = 0V
VBRT = 1V
VBRT = 5V
VBRT = OPEN
0.015
0.185 0.2 0.215
0.95 1.0 1.05
0.19 0.2 0.21
525 600 675
MIC2297-42BML (nominal voltage) 42
46
50
MIC2297-15BML (nominal voltage) 15
16
18
Over-Temperature Threshold
150
TJ
Shutdown
Hysteresis
10
Units
V
V
mA
µA
mV
nA
%
%
%
A
mV
µA
V
µA
V
KHz
V
°C
°C
May 2005
3
M9999-050305
(408) 955-1690
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