MIC3287 Ver la hoja de datos (PDF) - Micrel
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MIC3287 Datasheet PDF : 9 Pages
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Micrel, Inc
Absolute Maximum Ratings(1)
Supply Voltage (VIN)........................................................ 7V
Switch Voltage (VSW).......................................–0.3V to 40V
Enable Pin Voltage (VEN).................................... –0.3 to VIN
FB Voltage (VFB).............................................................. 6V
Switch Current (ISW)...................................................... 1.2A
Ambient Storage Temperature (TS)........... –65°C to +150°C
ESD Rating(3)................................................................. 2kV
MIC3287
Operating Ratings(2)
Supply Voltage (VIN).........................................2.8V to 6.5V
Output Voltage (VOUT).........................................VIN to 36V
Output Voltage (VOUT)(4)....................................VIN to VOVP
Junction Temperature Range (TJ)............. –40°C to +125°C
Package Thermal Impedance
Thin
Thin
SOT-23-5
SOT-23-6
((θθJJAA))((55))..
......................................
......................................
207°C/W
134°C/W
8-Pin MLF (θJA).................................................... 90°C/W
Electrical Characteristics(6)
TA = 25°C, VIN = VEN = 3.6V, VOUT = 10V, IOUT = 10mA, unless otherwise noted. Bold values indicate –40°C ≤ TJ ≤125°C.
Symbol
Parameter
Condition
Min Typ Max
VIN
Supply Voltage Range
2.8
6.5
VUVLO
Under Voltage Lockout
1.8
2.1
2.4
IVIN
Quiescent Current
ISD
Shutdown Current
VFB > 500mV, (not switching)
2.1
5
VEN = 0V(7)
0.04
1
VFB
Feedback Voltage
(±7.5%)
231 250 269
IFB
Feedback Input Current
Line Regulation
Load Regulation
VFB = 250mV
3V ≤ VIN ≤ 5V(8)
5mA ≤ IOUT ≤ 20mA(8)
–450
0.4
1
0.5
DMAX
Maximum Duty Cycle
85
90
ISW
Switch Current Limit
VIN = 3.6V
350
VSW
Switch Saturation Voltage
VIN = 3.6V, ISW = 300mA
250
ISW
Switch Leakage Current
VEN = 0V, VSW = 10V
0.01
1
VEN
Enable Threshold
TURN ON
1.5
TURN OFF
0.4
IEN
Enable Pin Current
VEN = 10V
21
40
fSW
Oscillator Frequency
1
1.2
1.4
VOVP
Overvoltage Protection
MIC3287-24YD6
17
19
24
MIC3287-24YML
TJ
Overtemperature
150
Threshold Shutdown
Hysteresis
10
Units
V
V
mA
µA
mV
nA
%
%
%
mA
mV
µA
V
V
µA
MHz
V
°C
°C
Notes:
1. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating
the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max),
the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation will result in excessive
die temperature, and the regulator will go into thermal shutdown.
2. This device is not guaranteed to operate beyond its specified operating ratings.
3. Devices are inherently ESD sensitive. Handling precautions required. Human body model.
4. For options with OVP.
5. Using 4 layer PCB.
6. Specification for packaged product only.
7. ISD = IVIN.
8. Guaranteed by design.
April 2010
3
M9999-042910
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