CAT4240_0711 Datasheet, PDF (2/14 Pages) Catalyst Semiconductor – 6 Watt Boost LED Driver

CAT4240
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 60
-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 ⁽¹⁾
Range
up to 5.5
0 to 38
-40 to +85
Units
V
V
ºC
DC ELECTRICAL CHARACTERISTICS
V_IN = 3.6V, ambient temperature of 25ºC (over recommended operating conditions unless specified otherwise).
Symbol Parameter
I_Q Operating Current
I_SD Shutdown Current
V_FB FB Pin Voltage
I_FB FB pin input leakage
I_LED Programmed LED Current
V_IH S¯¯H¯D¯N¯ Logic High
V_IL S¯¯H¯D¯N¯ Logic Low
F_SW Switching Frequency
DC Maximum Duty Cycle
I_LIM Switch Current Limit
R_SW Switch “On” Resistance
I_LEAK Switch Leakage Current
Thermal Shutdown
Test Conditions
V_FB = 0.2V
V_FB = 0.4V (not switching)
V_{S¯¯H¯D¯N¯} = 0V
6 LEDs with I_LED = 75mA
Min
Typ
0.6
0.1
0.1
285
300
R1 = 10Ω
R1 = 5Ω
28.5
30
60
Enable Threshold Level
0.8
Shutdown Threshold Level
0.4
0.7
0.8
1.0
V_IN = 3V
92
V_IN = 3.6V
600
V_IN = 5V
750
I_SW = 100mA
1.0
Switch Off, V_SW = 30V
2
150
Max Units
1.5 mA
0.6
1
µA
315 mV
1
µA
31.5 mA
1.5
V
V
1.3 MHz
%
mA
2.0
Ω
5
µA
ºC
Thermal Hysteresis
20
ºC
V_UVLO
Undervoltage Lockout (UVLO)
Threshold
1.9
V
V_OV-SW Overvoltage Detection Threshold
V_OCL Output Voltage Clamp
“Open LED”
40
V
42
V
Note:
(1) Thin SOT23-5 package thermal resistance θ_JA = 135°C/W when mounted on board over a ground plane.
Doc. No. MD-5026 Rev. C
2
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice