MIC2292 Datasheet, PDF (3/9 Pages) Micrel Semiconductor – High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP

MIC2292/93
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
Schottky Reverse Voltage (V_DA) ................................... 34V
ESD Rating⁽³⁾ ................................................................ 2kV
Micrel
Operating Ratings⁽²⁾
Supply Voltage (V_IN) ........................................ 2.5V to 10V
Output Voltage (V_OUT) ..................................... V_IN to V_OVP
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, V_IN = V_EN = 3.6V, V_OUT = 15V, I_OUT = 20mA, 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
Enable Pin Current
f_SW
Oscillator Frequency
V_EN = 10V
MIC2292
MIC2293
20
40
1.4
1.6
1.8
1.75 2.0 2.25
V_D
I_RD
V_OVP
T_J
Schottky Forward Drop
Schottky Leakage Current
Overvoltage Protection
Overtemperature
Threshold Shutdown
I_D = 150mA
V_R = 30V
MIC2292/93-15
MIC2292/93-34
Hysteresis
0.8
1
4
13
14
16
30
32
34
150
10
Units
V
V
mA
µA
mV
nA
%
%
%
mA
mV
µA
V
V
µA
MHz
MHz
V
µA
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.
6. Guaranteed by design.
August, 2004
3
M9999-081204