CAT4237TD-T3 Datasheet, PDF (2/14 Pages) ON Semiconductor – High Voltage CMOS Boost White LED Driver

CAT4237
ABSOLUTE MAXIMUM RATINGS
Parameters
V_IN, FB voltage
S¯¯H¯D¯N¯ voltage
SW voltage
Storage Temperature Range
Junction Temperature Range
Lead Temperature
Ratings
-0.3 to +7
-0.3 to +7
-0.3 to 55
-65 to +160
-40 to +150
300
Units
V
V
V
ºC
ºC
ºC
RECOMMENDED OPERATING CONDITIONS
Typical application circuit with external components are shown on page 1.
Parameters
V_IN
SW pin voltage
Ambient Temperature Range
6, 7 or 8 LEDs
Range
2.8 to 5.5
0 to 30
-40 to +85
1 to 40
Units
V
V
ºC
mA
Note:
(1) Thin SOT23-5 package thermal resistance θ_JA = 135°C/W when mounted on board over a ground plane.
DC ELECTRICAL CHARACTERISTICS
V_IN = 3.6V, ambient temperature of 25ºC (over recommended operating conditions unless specified otherwise).
Symbol
I_Q
I_SD
V_FB
I_FB
I_LED
V_IH
V_IL
F_SW
I_LIM
R_SW
I_LEAK
V_UVLO
V_OV-SW
Parameter
Operating Current
Shutdown Current
FB Pin Voltage
FB pin input leakage
Programmed LED Current
S¯¯H¯D¯N¯ Logic High
S¯¯H¯D¯N¯ Logic Low
Switching Frequency
Switch Current Limit
Switch “On” Resistance
Switch Leakage Current
Thermal Shutdown
Thermal Hysteresis
Undervoltage Lockout
(UVLO) Threshold
Overvoltage Threshold
Conditions
V_FB = 0.2V
V_FB = 0.4V (not switching)
V_{S¯¯H¯D¯N¯} = 0V
8 LEDs with I_LED=20mA
R1 = 10Ω
R1 = 15Ω
R1 = 20Ω
Enable Threshold Level
Shutdown Threshold Level
I_SW = 100mA
Switch Off, V_SW = 5V
Min Typ Max Unit
0.6
0.1
1.5
0.6
mA
0.1
1
µA
285
300
315
mV
1
µA
28.5
30
31.5
19
20
21
mA
14.25 15 15.75
0.8
1.5
V
0.4
0.7
V
0.8
1.0
1.3
MHz
350
450
600
mA
1.0
2.0
Ω
1
5
µA
150
ºC
20
ºC
1.9
V
35
V
Doc. No. MD-5013, Rev. C
2
2008 SCILLC. All rights reserved.
Characteristics subject to change without notice