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Micrel, Inc.
Absolute Maximum Ratings (1)
Supply Voltage (V IN ) .......................................................12V
Switch Voltage (V SW )....................................... –0.3V to 34V
Enable Pin Voltage (V EN )................................... –0.3V to V IN
FB Voltage (V FB )...............................................................6V
Switch Current (I SW ) .........................................................2A
Ambient Storage Temperature (T s ) ........... –65°C to +150°C
Schottky Reverse Voltage (V DA ).....................................34V
EDS Rating (3) .................................................................. 2kV
MIC2289C
Operating Ratings (2)
Supply voltage (V IN ) ........................................ 2.5V to +10V
Output Voltage (V IN ) ............................................ V IN to V OVP
Junction Temperature (T J ) ........................ –40°C to +125°C
Package Thermal Resistance
Thin SOT-23-6 ( θ JA ) ........................................177°C/W
Electrical Characteristics (4)
T A = 25°C, V IN = V EN = 3.6V, V OUT = 10V, I OUT = 20mA, unless otherwise noted. Bold values indicate –40°C< T J < +125°C.
Symbol
V IN
Parameter
Supply Voltage Range
Condition
Min
2.5
Typ
Max
10
Units
V
V UVLO
I VIN
I SD
Under Voltage Lockout
Quiescent Current
Shutdown Current
V FB > 200mV, (not switching)
V EN = 0V (5)
1.8
2.1
2.5
0.1
2.4
5
1
V
mA
μA
V FB
I FB
Feedback Voltage
Feedback Input Current
(±10%)
V FB = 95mV
85
95
–450
105
mV
nA
Line Regulation (6)
3V ≤ V IN ≤ 5V
0.5
%
Load Regulation
(6)
5mA ≤ I OUT ≤ 20mA
0.5
%
D MAX
I SW
V SW
Maximum Duty Cycle
Switch Current Limit
Switch Saturation Voltage
I SW = 0.5A
85
90
750
450
%
mA
mV
I SW
V EN
I EN
Switch Leakage Current
Enable Threshold
Enable Pin Current
V EN = 0V, V SW = 10V
TURN ON
TURN OFF
V EN = 10V
1.5
0.01
20
5
0.4
40
μA
V
V
μA
f SW
V D
I RD
Oscillator Frequency
Schottky Forward Drop
Schottky Leakage Current
I D = 150mA
V R = 30V
1.05
1.2
0.8
1.35
1
4
MHz
V
μA
V OVP
T J
Overvoltage Protection
Overtemperature
Threshold Shutdown
MIC2289C-34YD6 only
Hysteresis
27
32
150
10
37
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. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model.
4. Specification for packaged product only.
5. I SD = I VIN .
6. Guaranteed by design
August 2007
3
M9999-081507-B
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