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MIC2289C_07 Datasheet, PDF (3/9 Pages) Micrel Semiconductor – White LED Driver Internal Schottky Diode and OVP
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Micrel, Inc.
Absolute Maximum Ratings(1)
Supply Voltage (VIN) .......................................................12V
Switch Voltage (VSW)....................................... –0.3V to 34V
Enable Pin Voltage (VEN)................................... –0.3V to VIN
FB Voltage (VFB)...............................................................6V
Switch Current (ISW) .........................................................2A
Ambient Storage Temperature (Ts) ...........–65°C to +150°C
Schottky Reverse Voltage (VDA).....................................34V
EDS Rating(3).................................................................. 2kV
MIC2289C
Operating Ratings(2)
Supply voltage (VIN) ........................................ 2.5V to +10V
Output Voltage (VIN) ............................................ VIN to VOVP
Junction Temperature (TJ) ........................ –40°C to +125°C
Package Thermal Resistance
Thin SOT-23-6 (θJA) ........................................177°C/W
Electrical Characteristics(4)
TA = 25°C, VIN = VEN = 3.6V, VOUT = 10V, IOUT = 20mA, unless otherwise noted. Bold values indicate –40°C< TJ < +125°C.
Symbol Parameter
Condition
Min Typ Max Units
VIN
Supply Voltage Range
2.5
10
V
VUVLO
Under Voltage Lockout
1.8
2.1
2.4
V
IVIN
Quiescent Current
ISD
Shutdown Current
VFB > 200mV, (not switching)
VEN = 0V(5)
2.5
5
mA
0.1
1
µA
VFB
Feedback Voltage
(±10%)
85
95
105
mV
IFB
Feedback Input Current
Line Regulation(6)
Load Regulation(6)
VFB = 95mV
3V ≤ VIN ≤ 5V
5mA ≤ IOUT ≤ 20mA
–450
nA
0.5
%
0.5
%
DMAX
Maximum Duty Cycle
85
90
%
ISW
Switch Current Limit
750
mA
VSW
Switch Saturation Voltage
ISW = 0.5A
450
mV
ISW
Switch Leakage Current
VEN = 0V, VSW = 10V
0.01
5
µA
VEN
Enable Threshold
TURN ON
TURN OFF
1.5
V
0.4
V
IEN
Enable Pin Current
VEN = 10V
20
40
µA
fSW
Oscillator Frequency
1.05 1.2
1.35
MHz
VD
Schottky Forward Drop
ID = 150mA
0.8
1
V
IRD
Schottky Leakage Current
VR = 30V
4
µA
VOVP
Overvoltage Protection
MIC2289C-34YD6 only
27
32
37
V
TJ
Overtemperature
Threshold Shutdown
Hysteresis
150
°C
10
°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. 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. ISD = IVIN.
6. Guaranteed by design
August 2007
3
M9999-081507-B
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