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LM3409MY-NOPB Datasheet, PDF (4/43 Pages) Texas Instruments – PFET Buck Controller for High Power LED Drivers
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LM3409, LM3409HV, LM3409-Q1
SNVS602J – MARCH 2009 – REVISED MAY 2013
www.ti.com
Electrical Characteristics LM3409/09N/09Q/09HV/09QHV (continued)
VIN = 24V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA = TJ = +25°C (1). Limits
appearing in boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are
specified by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min(2) Typ(1) Max(2) Units
RPGATE
Driver output resistance
Sourcing 50 mA
Sinking 50 mA
2
Ω
2
VCC REGULATOR
VCC
VCC-UVLO
VIN pin voltage - VCC pin
voltage
VCC under voltage lockout
threshold
VIN > 9V
0 < ICC < 20 mA
VCC increasing
5.5
6
6.5
V
3.73
V
VCC-HYS
VCC UVLO hysteresis
ICC-LIM
VCC regulator current limit
OFF-TIMER AND ON-TIMER
VCC decreasing
283
mV
30
45
mA
VOFT
tD-OFF
Off-time threshold
COFF threshold to PGATE
falling delay
1.122 1.243 1.364
V
25
ns
tON-MIN
Minimum on-time
tOFF-MAX
Maximum off-time
UNDER VOLTAGE LOCKOUT
115
211
ns
300
µs
IUVLO
VUVLO-R
IUVLO-HYS
ENABLE
UVLO pin current
Rising UVLO threshold
UVLO hysteresis current
VUVLO = 1V
10
nA
1.175 1.243 1.311
V
22
µA
IEN
VEN-TH
EN pin current
EN pin threshold
VEN-HYS
EN pin hysteresis
tEN-R
EN pin rising delay
tEN-F
EN pin falling delay
THERMAL RESISTANCE
θJA
Junction to Ambient
θJC
Junction to Case
VEN rising
VEN falling
EN rise - PGATE fall
EN fall - PGATE rise
VSSOP-10 Package (4)
PDIP-14 Package
VSSOP-10 Package (4)
PDIP-14 Package
10
nA
1.74
V
.5
420
mV
42
ns
21
ns
50
°C/W
87
15
37
(4) Measured with DAP soldered to a minimum of 2 square inches of 1oz. copper on the top or bottom PCB layer. Actual value will be
different depending upon the application environment.
4
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