LM3406_09 Datasheet, PDF (4/26 Pages) National Semiconductor (TI) – 1.5A Constant Current Buck Regulator for Driving High Power LEDs

Symbol
Parameter
V_CC-UV-TH
V_CC Under-voltage Lock-out
Threshold
V_CC-UV-HYS
V_CC Under-voltage Lock-out
Hysteresis
I_IN-OP
I_IN-SD
CURRENT LIMIT
I_IN Operating Current
I_IN Shutdown Current
I_LIM
Current Limit Threshold
DIM COMPARATOR
V_IH
Logic High
V_IL
Logic Low
I_DIM-PU
DIM Pull-up Current
MOSFET AND DRIVER
R_DS-ON
V_DR-UVLO
Buck Switch On Resistance
BOOT Under-voltage Lock-out
Threshold
V_DR-HYS
BOOT Under-voltage Lock-out
Hysteresis
THERMAL SHUTDOWN
T_SD
Thermal Shutdown Threshold
T_SD-HYS
Thermal Shutdown Hysteresis
THERMAL RESISTANCE
θ_JA
Junction to Ambient
Conditions
V_CC Increasing
V_CC Decreasing
Non-switching, CS = 0.5V
RON = 0V
DIM Increasing
DIM Decreasing
DIM = 1.5V
I_SW = 200 mA, BOOT = 6.3V
BOOT–SW Increasing
BOOT–SW Decreasing
eTSSOP-14 Package (Note 4)
Min Typ Max Units
5.3
V
150
mV
1.2
mA
240
350
µA
1.7
2.1
2.7
A
2.2
V
0.8
V
80
µA
0.37 0.75
Ω
1.7
2.9
4.3
V
370
mV
165
°C
25
°C
50
°C/W
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the Operating Ratings is not implied. The recommended Operating Ratings indicate conditions at which the device is functional and the device should not be
operated beyond such conditions.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 3: Typical values represent most likely parametric norms at the conditions specified and are not guaranteed.
Note 4: θ_JA of 50°C/W with DAP soldered to a minimum of 2 square inches of 1oz. copper on the top or bottom PCB layer.
Note 5: Specified with junction temperature from 0°C - 125°C.
Note 6: V_IN = 24V, I_F = 1A, T_A = 25°C, and the load consists of three InGaN LEDs in series unless otherwise noted. See the Bill of Materials table at the end of
the datasheet.
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