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MIC2289 Datasheet, PDF (3/10 Pages) Micrel Semiconductor – 2mm × 2mm White LED Driver with 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
MIC2289
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
2mm x 2mm MLF® (θJA).....................................93°C/W
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
IVIN
ISD
VFB
Under Voltage Lockout
Quiescent Current
Shutdown Current
Feedback Voltage
VFB > 200mV, (not switching)
VEN = 0V(5)
(±5%)
1.8
2.1
2.4
V
2.5
5
mA
0.1
1
µA
90
95
100
mV
IFB
DMAX
Feedback Input Current
Line Regulation(6)
Load Regulation(6)
Maximum Duty Cycle
VFB = 95mV
3V ≤ VIN ≤ 5V
5mA ≤ IOUT ≤ 20mA
–450
nA
0.5
1
%
0.5
%
85
90
%
ISW
Switch Current Limit
VSW
Switch Saturation Voltage
ISW = 0.5A
750
mA
450
mV
ISW
Switch Leakage Current
VEN
Enable Threshold
VEN = 0V, VSW = 10V
TURN ON
TURN OFF
0.01
5
µA
1.5
V
0.4
V
IEN
Enable Pin Current
VEN = 10V
20
40
µA
fSW
Oscillator Frequency
VD
Schottky Forward Drop
ID = 150mA
1.05 1.2
0.8
1.35
1
MHz
V
IRD
VOVP
Schottky Leakage Current
Overvoltage Protection
VR = 30V
MIC2289-15
MIC2289-24
MIC2289-34
4
µA
13
14
16
V
21 22.5
24
V
30
32
34
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
July 2007
3
M9999-071007
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