MIC2287 Datasheet, PDF (3/10 Pages) Micrel Semiconductor – 1.2MHz PWM White LED Driver with OVP in 2mm × 2mm MLF™ and Thin SOT-23

MIC2287
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 V_IN
FB Voltage (V_FB) ............................................................. 6V
Switch Current (I_SW) ....................................................... 2A
Ambient Storage Temperature (T_S) ......... –65°C to +150°C
ESD Rating⁽³⁾ ................................................................ 2kV
Micrel
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, V_IN = V_EN = 3.6V, V_OUT = 10V, I_OUT = 10mA, unless otherwise noted. Bold values indicate –40°C ≤ T_J ≤125°C.
Symbol
Parameter
Condition
Min Typ Max
V_IN
V_UVLO
I_VIN
I_SD
V_FB
I_FB
D_MAX
I_SW
V_SW
I_SW
V_EN
Supply Voltage Range
Under Voltage Lockout
Quiescent Current
Shutdown Current
Feedback Voltage
Feedback Input Current
Line Regulation
Load Regulation
Maximum Duty Cycle
Switch Current Limit
Switch Saturation Voltage
Switch Leakage Current
Enable Threshold
V_FB > 200mV, (not switching)
V_EN = 0V⁽⁵⁾
(±5%)
V_FB = 95mV
3V ≤ V_IN ≤ 5V
5mA ≤ I_OUT ≤ 20mA
I_SW = 0.5A
V_EN = 0V, V_SW = 10V
TURN ON
TURN OFF
2.5
10
1.8
2.1
2.4
2.5
5
0.1
1
90
95
100
–450
0.5
1
0.5
2
85
90
750
450
0.01
5
1.5
0.4
I_EN
f_SW
V_OVP
Enable Pin Current
Oscillator Frequency
Overvoltage Protection
V_EN = 10V
MIC2287BML- 15 only
MIC2287BML- 24 only
MIC2287BML- 34 only
20
40
1.05 1.2 1.35
13
14
16
21 22.5 24
30
32
34
T_J
Overtemperature
150
Threshold Shutdown
Hysteresis
10
Units
V
V
mA
µA
mV
nA
%
%
%
mA
mV
µA
V
V
µA
MHz
V
V
V
°C
°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, T_A. 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 = I_VIN.
August 2004
3
M0510-081104