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MIC2287 Datasheet(Arkusz danych) 3 Page - Micrel Semiconductor

Numer części MIC2287
Szczegółowy opis  1.2MHz PWM White LED Driver with OVP in 2mm × 2mm MLF™ and Thin SOT-23
Pobierz  10 Pages
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Producent  MICREL [Micrel Semiconductor]
Strona internetowa  http://www.micrel.com
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 3 page
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August 2004
3
M0510-081104
MIC2287
Micrel
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 VIN
FB Voltage (V
FB) ............................................................. 6V
Switch Current (I
SW) ....................................................... 2A
Ambient Storage Temperature (T
S) ......... –65°C to +150°C
ESD Rating(3) ................................................................ 2kV
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
Electrical Characteristics(4)
T
A = 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
Units
V
IN
Supply Voltage Range
2.5
10
V
V
UVLO
Under Voltage Lockout
1.8
2.1
2.4
V
I
VIN
Quiescent Current
V
FB > 200mV, (not switching)
2.5
5
mA
I
SD
Shutdown Current
V
EN = 0V
(5)
0.1
1
µA
V
FB
Feedback Voltage
(
±5%)
90
95
100
mV
I
FB
Feedback Input Current
V
FB = 95mV
–450
nA
Line Regulation
3V
≤ V
IN ≤ 5V
0.5
1
%
Load Regulation
5mA
≤ I
OUT ≤ 20mA
0.5
2
%
D
MAX
Maximum Duty Cycle
85
90
%
I
SW
Switch Current Limit
750
mA
V
SW
Switch Saturation Voltage
I
SW = 0.5A
450
mV
I
SW
Switch Leakage Current
V
EN = 0V, VSW = 10V
0.01
5
µA
V
EN
Enable Threshold
TURN ON
1.5
V
TURN OFF
0.4
V
I
EN
Enable Pin Current
V
EN = 10V
20
40
µA
f
SW
Oscillator Frequency
1.05
1.2
1.35
MHz
V
OVP
Overvoltage Protection
MIC2287BML- 15 only
13
14
16
V
MIC2287BML- 24 only
21
22.5
24
V
MIC2287BML- 34 only
30
32
34
V
T
J
Overtemperature
150
°C
Threshold Shutdown
Hysteresis
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, T
J(max),
the junction-to-ambient thermal resistance,
θ
JA, 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. Specification for packaged product only.
5. I
SD = IVIN.




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