LM3406_09 Datasheet, PDF (3/26 Pages) National Semiconductor (TI) – 1.5A Constant Current Buck Regulator for Driving High Power LEDs

Absolute Maximum Ratings
LM3406/LM3406HV (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to GND
VINS to GND
VOUT to GND
BOOT to GND
SW to GND
BOOT to VCC
BOOT to SW
VCC to GND
DIM to GND
-0.3V to 45V
(76V LM3406HV)
-0.3V to 45V
(76V LM3406HV)
-0.3V to 45V
(76V LM3406HV)
-0.3V to 59V
(90V LM3406HV)
-1.5V to 45V
(76V LM3406HV)
-0.3V to 45V
(76V LM3406HV)
-0.3V to 14V
-0.3V to 14V
-0.3V to 7V
COMP to GND
CS to GND
RON to GND
Junction Temperature
Storage Temp. Range
ESD Rating (Note 2)
Soldering Information
Lead Temperature (Soldering,
10sec)
Infrared/Convection Reflow (15sec)
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
150°C
-65°C to 125°C
2kV
260°C
235°C
Operating Ratings
(Note 1)
V_IN
Junction Temperature Range
Thermal Resistance θ_JA
(eTSSOP-14 Package)
(Note 4)
6V to 42V
(75V LM3406HV)
−40°C to +125°C
50°C/W
Electrical Characteristics V_IN = 24V unless otherwise indicated. Typicals and limits appearing in plain type apply
for T_A = T_J = +25°C (Note 3). Limits appearing in boldface type apply over full Operating Temperature Range. Datasheet min/
max specification limits are guaranteed by design, test, or statistical analysis.
LM3406/LM3406HV
Symbol
Parameter
Conditions
REGULATION COMPARATOR AND ERROR AMPLIFIER
V_REF
CS Regulation Threshold
CS Decreasing, SW turns on
V_0V
I_CS
I_VOUT
I_COMP
G_m-CS
CS Over-voltage Threshold
CS Bias Current
VOUT Bias Current
COMP Pin Current
Error Amplifier
Transconductance
SHUTDOWN
V_SD-TH
Shutdown Threshold
V_SD-HYS
Shutdown Hysteresis
ON AND OFF TIMER
t_OFF-MIN
t_ON
Minimum Off-time
Programmed On-time
t_ON-MIN
Minimum On-time
VINS COMPARATOR
V_INS-TH
VINS Pin Threshold
I_IN-2WD
VINS Pin Input Current
INTERNAL REGULATOR
V_CC-REG
V_IN-DO
V_CC Regulated Output
V_IN - V_CC
V_CC-BP-TH
V_CC-LIM
V_CC Bypass Threshold
V_CC Current Limit
CS Increasing, SW turns off
CS = 0V
VOUT = 24V
CS = 0V
150 mV < CS < 250 mV
RON Increasing
RON Decreasing
CS = 0V
V_IN = 24V, V_O = 12V, R_ON = 200 kΩ
VINS decreasing
VINS = 24V * 0.7
0 mA < I_CC < 5 mA
I_CC = 5 mA, 6.0V < V_IN < 8.0V, Non-
switching
V_IN Increasing
V_IN = 24V, V_CC = 0V
Min Typ Max Units
187.5 200
210
mV
191.0
(Note 5)
210.0
(Note 5)
300
mV
0.9
µA
83
µA
25
µA
145
µS
0.3
0.7
1.05
V
40
mV
230
ns
800 1300 1800
280
70
%VIN
25
µA
6.4
7
7.4
V
300
mV
8.8
V
4
20
mA
3
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