MIC3223 Datasheet, PDF (3/24 Pages) Micrel Semiconductor – High Power Boost LED Driver with Integrated FET

Micrel, Inc.
MIC3223
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .....................................................+22V
Switch Voltage (V_SW)..................................... -0.3V to +42V
Regulated Voltage (V_DD) ............................... -0.3V to +6.5V
Dimming In Voltage (V_{DIM_IN}) ...............-0.3V to (V_DD + 0.3V)
Dimming Out Voltage (V_{DIM_OUT})..........-0.3V to (V_DD + 0.3V)
Soft-Start Voltage (V_SS) .......................-0.3V to (V_DD + 0.3V)
Enable Voltage (V_EN)............................-0.3V to (V_IN + 0.3V)
Feedback Voltage (V_FB) ......................-0.3V to (V_DD + 0.3V)
Switch Current (I_SW) ..................................Internally Limited
Comp Voltage (V_COMP).......................-0.3V to (+V_DD + 0.3V)
FET Driver Supply (V_DRVVDD) ......................... -0.3V to +6.5V
PGND to AGND ............................................ -0.3V to +0.3V
Over Voltage Protection (V_OVP) ...........-0.3V to (V_DD + 0.3V)
Peak Reflow Temperature (soldering, 10-20sec.) ..... 260°C
Storage Temperature (T_S)..........................-65°C to +150°C
ESD Rating⁽³⁾................................................................ +2kV
Operating Ratings⁽²⁾
Supply Voltage (V_IN)...................................... +4.5V to +20V
Switch Voltage (V_SW)....................................................+37V
Junction Temperature (T_J) .........................-40°C to +125°C
Junction Thermal Resistance
ePad TSSOP-16L (θ_JA)...................................36.5°C/W
Electrical Characteristics⁽⁴⁾
V_IN = V_EN = 12V; L = 22µH, C_IN =4.7µF, C_OUT =2x4.7µF; T_A = 25°C, BOLD values indicate –40°C≤ T_J ≤ +125°C, unless otherwise noted.
Symbol
Parameter
Condition
Min Typ Max Units
V_IN
Voltage Supply Range
4.5
20
V
V_UVLO
Under Voltage Lockout
Monitoring for V_DD
3
3.7
4.4
V
V_OVP
Over Voltage Protection
1.216 1.28 1.344
V
I_VIN
Quiescent Current
V_FB=250mV
2.1
5
mA
I_SD
Shutdown Current
V_EN =0V
10
µA
V_FB
Feedback Voltage
Room Temperature
Over Temperature
190 200
210
mV
184
216
mV
I_FB
Feedback Input Current
V_FB=200mV
-450
nA
V_DD
Internal Voltage Regulator
5.3
V
D_MAX
Maximum Duty Cycle
85
90
95
%
V_DD Line Regulation
V_LED=18V, V_IN=8V to 16V, I_LED=350mA
0.5
%
I_SW
Switch Current Limit
3.5
9
10.5
A
R_SW
Switch R_DSON plus R_CS
100
mΩ
I_SW
Switch Leakage Current
V_EN=0, V_SW=37V
0.01
10
µA
V_EN
Enable Threshold
Turn On
Turn Off
1.5
V
0.4
V
I_EN
Enable Pin Current
20
40
µA
V_{DIM_TH_H} DIM_IN Threshold High
Logic High
1.5
V
V_{DIM_TH_L} DIM_IN Threshold Low
Logic Low
0.4
V
Hys
DIM_IN Hysteresis
500
mV
I_{DIM_IN}
DIM_IN Pin Current
V_{DIM_IN} = 5V
1
µA
T_DR
Dim Delay (Rising)
DIM_IN Rising
40
ns
T_DF
Dim Delay (Falling
DIM_IN Falling
30
ns
January 2010
3
M9999-011510-A