LM3402MRX National Semiconductor, LM3402MRX Datasheet - Page 5

• Manufacturer Part Number: LM3402MRX
• Description: LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs; Package: PSOP; No of Pins: 8; Qty per Container: 2500; Container: Reel
• Manufacturer: National Semiconductor

SYSTEM PARAMETERS
SYSTEM PARAMETERS
REGULATION AND OVER-VOLTAGE COMPARATORS
V
V
I
SHUTDOWN
V
V
OFF TIMER
t
INTERNAL REGULATOR
V
V
V
V
V
V
V
V
V
V
V
I
I
CURRENT LIMIT
I
CS
OFF-MIN
IN-OP
IN-SD
LIM
REF-REG
REF-0V
SD-TH
SD-HYS
CC-REG
IN-DO
CC-BP-TH
CC-BP-HYS
CC-Z-6
CC-Z-8
CC-Z-24
CC-LIM
CC-UV-TH
CC-UV-HYS
CC-UV-DLY
Electrical Characteristics
for T
specification limits are guaranteed by design, test, or statistical analysis.
LM3402
LM3402HV
LM3402/LM3402HV
Symbol
Symbol
Symbol
A
t
t
t
t
ON-1
ON-2
ON-1
ON-2
= T
J
= +25°C.
On-time 1
On-time 2
On-time 1
On-time 2
CS Regulation Threshold
CS Over-voltage Threshold
CS Bias Current
Shutdown Threshold
Shutdown Hysteresis
Minimum Off-time
V
V
V
V
V
(0 mA < I
V
V
Threshold
V
Hysteresis
V
Filter Delay
I
I
Current Limit Threshold
IN
IN
(Note
CC
IN
CC
CC
CC
CC
CC
CC
CC
Operating Current
Shutdown Current
- V
Regulated Output
Bypass Threshold
Bypass Hysteresis
Output Impedance
Current Limit (Note 3)
Under-voltage Lock-out
Under-voltage Lock-out
Under-voltage Lock-out
CC
4) Limits appearing in boldface type apply over full Operating Temperature Range. Datasheet min/max
CC
Dropout
Parameter
Parameter
Parameter
< 5 mA)
V
IN
= 24V unless otherwise indicated. Typicals and limits appearing in plain type apply
V
V
V
V
CS Decreasing, SW turns on
CS Increasing, SW turns off
CS = 0V
R
R
CS = 0V
I
V
V
V
V
V
V
V
V
100 mV Overdrive
Non-switching, CS = 0V
RON / SD = 0V
CC
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
CC
CC
ON
ON
= 10V, R
= 70V, R
= 10V, R
= 40V, R
= 5 mA, 6.0V < V
Increasing
Decreasing
= 6V
= 8V
= 24V
= 24V, V
Increasing
Decreasing
/ SD Increasing
/ SD Decreasing
5
ON
ON
ON
ON
CC
Conditions
Conditions
Conditions
= 200 kΩ
= 200 kΩ
= 200 kΩ
= 200 kΩ
= 0V
IN
< 8.0V
Min
290
Min
490
2.1
Min
2.1
194
530
0.3
6.6
2.75
2.75
Typ
Typ
380
650
5.25
Typ
200
300
300
300
225
150
600
735
0.1
0.7
8.8
0.4
40
55
50
16
90
7
3
Max
Max
Max
1.05
810
470
206
900
180
940
3.4
3.4
7.4
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Units
Units
Units
mV
mV
mV
mV
mV
mA
mV
mA
µA
µA
µA
ns
µs
µs
ns
µs
ns
Ω
V
V
V
V