LM3409 Datasheet, PDF (3/30 Pages) National Semiconductor (TI) – PFET Buck Controller for High Power LED Drives

Absolute Maximum Ratings
LM3409/09HV (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN, EN, UVLO to GND
VIN to VCC, PGATE
VIN to PGATE
VIN to CSP, CSN
COFF to GND
COFF current
IADJ Current
Junction Temperature
-0.3V to 45V
(76V LM3409HV)
-0.3V to 7V
-2.8V for 100ns
9.5V for 100ns
-0.3V to 0.3V
-0.3V to 4V
±1 mA continuous
±5 mA continuous
150°C
Storage Temp. Range
ESD Rating (Note 2)
Soldering Information
Lead Temperature (Soldering,
10sec)
Infrared/Convection Reflow (15sec)
-65°C to 125°C
1kV
260°C
260°C
Operating Ratings (LM3409/09HV)
(Note 1)
VIN
Junction Temperature Range
Thermal Resistance θ_JA
(eMSOP-10 Package)
(Note 5)
6V to 42V
(75V LM3409HV)
−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.
LM3409/LM3409HV
Symbol
Parameter
Conditions
PEAK CURRENT COMPARATOR
V_CST
V_CSP – V_CSN average peak
current threshold
(Note 6)
A_ADJ
V_ADJ to V_CSP – V_CSN threshold
gain
V_ADJ-OC
IADJ pin open circuit voltage
I_ADJ
IADJ pin current
t_DEL
CSN pin falling delay
SYSTEM CURRENTS
I_IN
I_SD
PFET DRIVER
Operating current
Shutdown hysteresis current
R_PGATE
Driver output resistance
VCC REGULATOR
V_CC
VIN pin voltage - VCC pin
voltage
V_CC-UVLO
V_CC under voltage lockout
threshold
V_CC-HYS
V_CC UVLO hysteresis
I_CC-LIM
V_CC regulator current limit
OFF-TIMER AND ON-TIMER
V_OFT
t_D-OFF
Off-time threshold
COFF threshold to PGATE
falling delay
t_ON-MIN
Minimum on-time
t_OFF-MAX
Maximum off-time
UNDER VOLTAGE LOCKOUT
I_UVLO
UVLO pin current
V_ADJ = 1.0V
V_ADJ = V_ADJ-OC
0.1 < V_ADJ < 1.2V
V_ADJ = V_ADJ-OC
CSN fall - PGATE rise
Not switching
EN = 0V
Sourcing 50 mA
Sinking 50 mA
V_IN > 9V
0 < I_CC < 20 mA
V_CC increasing
V_CC decreasing
V_UVLO = 1V
Min Typ Max Units
(Note 4) (Note 3) (Note 4)
188
198
208
mV
231
246
261
0.2
V/V
1.189 1.243 1.297
V
3.8
5
6.4
µA
38
ns
2
mA
110
µA
2
Ω
2
5.5
6
6.5
V
3.73
V
283
mV
30
45
mA
1.122 1.243 1.364
V
25
ns
115
211
ns
300
µs
10
nA
3
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