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MIC2287
Absolute Maximum Ratings (1)
Supply Voltage (V IN ) ..................................................... 12V
Switch Voltage (V SW ) ......................................–0.3V to 34V
Enable Pin Voltage (V EN ) ................................... –0.3 to V IN
FB Voltage (V FB ) ............................................................. 6V
Switch Current (I SW ) ........................................................ 2A
Ambient Storage Temperature (T S ) .......... –65°C to +150°C
ESD Rating (3) ............................................................... 2kV
Electrical Characteristics (4)
Micrel, Inc.
Operating Ratings (2)
Supply Voltage (V IN ) ..........................................2.5V to 10V
Junction Temperature Range (T J ) ............ –40°C to +125°C
Package Thermal Impedance
2mm × 2mmMLF? ( θ JA ) ..................................... 93°C/W
Thin SOT-23-5 ( θ JA ) ......................................... 256°C/W
T A = 25°C, V IN = V EN = 3.6V, V OUT = 10V, I OUT = 10mA, unless otherwise noted. Bold values indicate –40°C ≤ T J ≤125°C.
Symbol Parameter Condition Min Typ Max
Units
V IN
V UVLO
I VIN
I SD
V FB
I FB
D MAX
I SW
V SW
I SW
V EN
I EN
f SW
V OVP
T J
Supply Voltage Range
Under Voltage Lockout
Quiescent Current
Shutdown Current
Feedback Voltage
Feedback Input Current
Line Regulation (6)
Load Regulation (6)
Maximum Duty Cycle
Switch Current Limit
Switch Saturation Voltage
Switch Leakage Current
Enable Threshold
Enable Pin Current
Oscillator Frequency
Overvoltage Protection
Overtemperature
Threshold Shutdown
V FB > 200mV, (not switching)
V EN = 0V (5)
(±5%)
V FB = 95mV
3V ≤ V IN ≤ 5V
5mA ≤ I OUT ≤ 20mA
I SW = 0.5A
V EN = 0V, V SW = 10V
TURN ON
TURN OFF
V EN = 10V
MIC2287BML- 15 only
MIC2287BML- 24 only
MIC2287BML- 34 only
Hysteresis
2.5
1.8
90
85
1.5
1.05
13
21
30
2.1
2.5
0.1
95
–450
0.5
0.5
90
750
450
0.01
20
1.2
14
22.5
32
150
10
10
2.4
5
1
100
1
2
5
0.4
40
1.35
16
24
34
V
V
mA
μA
mV
nA
%
%
%
mA
mV
μA
V
V
μA
MHz
V
V
V
°C
°C
Notes:
1. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical speci?cations 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, T J (max),
the junction-to-ambient thermal resistance, θ JA , and the ambient temperature, T A . 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 speci?ed operating ratings.
3. Devices are inherently ESD sensitive. Handling precautions required. Human body model.
4. Speci?cation for packaged product only.
5. I SD = I VIN .
6. Guaranteed by design.
July 2005
3
M9999-070105
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