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MIC2292 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part No. MIC2292
Description  High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC2292 Datasheet(HTML) 3 Page - Micrel Semiconductor

   
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August, 2004
3
M9999-081204
MIC2292/93
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
Schottky Reverse Voltage (V
DA) ................................... 34V
ESD Rating(3) ................................................................ 2kV
Operating Ratings(2)
Supply Voltage (V
IN) ........................................ 2.5V to 10V
Output Voltage (V
OUT) ..................................... VIN to VOVP
Junction Temperature Range (T
J) ........... –40°C to +125°C
Package Thermal Impedance
8-lead MLF™ (
θ
JA) .............................................. 93°C/W
Electrical Characteristics(4)
T
A = 25°C, VIN = VEN = 3.6V, VOUT = 15V, IOUT = 20mA, 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
MIC2292
1.4
1.6
1.8
MHz
MIC2293
1.75
2.0
2.25
MHz
V
D
Schottky Forward Drop
I
D = 150mA
0.8
1
V
I
RD
Schottky Leakage Current
V
R = 30V
4
µA
V
OVP
Overvoltage Protection
MIC2292/93-15
13
14
16
V
MIC2292/93-34
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.
6. Guaranteed by design.


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