lt3743 Linear Technology Corporation, lt3743 Datasheet - Page 3

• Manufacturer Part Number: lt3743
• Description: High Current Synchronous Step-down Led Driver With Three-state Control
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
Input Voltage Range
V
EN/UVLO Pin Falling Threshold
EN/UVLO Hysteresis
EN/UVLO Pin Current
PWM Pin Threshold
CTRL_SEL Threshold
SYNC Pin Threshold
CTRL_H and CTRL_L Pin Control Range
CTRL_H and CTRL_L Pin Current
Reference
Reference Voltage (V
Inductor Current Sensing
Full Range SENSE
SENSE
SENSE
Internal V
Regulation Voltage
NMOS FET Driver (Note 2)
Non-Overlap time HG to LG
Non-Overlap time LG to HG
Minimum On-Time LG
Minimum On-Time HG
Minimum Off-Time LG
High Side Driver Switch On-Resistance
Low Side Driver Switch On-Resistance
Switching Frequency
f
Soft-Start
Charging Current
Voltage Regulation Amplifi er
Input Bias Current
g
Feedback Regulation Voltage
SW
m
IN
Non-Switching Operation
Shutdown Mode
Gate Pull Up
Gate Pull Down
Gate Pull Up
Gate Pull Down
Pin Quiescent Current (Note 3)
+
–
Pin Current
Pin Current
CC
Regulator (V
+
to SENSE
REF
Pin)
CC_INT
–
Pin)
CONDITIONS
(Note 2)
V
V
V
With a 67kΩ Resistor from V
V
With V
(Note 4)
(Note 4)
(Note 4)
V
V
R
R
PWM
EN/UVLO
IN
CTRL_H
CBOOT
CC_INT
T
T
= 40kΩ
= 200kΩ
= 6V, EN/UVLO = 1.45V
= V
OUT
– V
= 5V
or V
= 0V
CTRL_SEL
~ 4V
A
SW
CTRL_L
= 25°C. V
= 5V
The
= 0V, Not Switching
= 1.5V
l
IN
denotes the specifi cations which apply over the full operating
= 12V, V
REF
to GND
EN/UVLO
= 5V, unless otherwise noted.
l
l
l
l
l
l
0.945
1.49
1.96
MIN
930
200
4.7
48
6
0
1000
1.55
0.99
TYP
130
100
100
200
218
200
1.8
0.1
1.0
1.0
1.0
2.3
1.3
2.5
1.3
5.5
5.5
51
50
10
60
50
60
2
5
1
1.025
1070
MAX
1.61
2.04
LT3743
233
2.5
1.5
5.2
36
54
1
UNITS
3
μA/V
3743f
kHz
kHz
mA
mV
mV
μA
μA
nA
nA
μA
μA
nA
ns
ns
ns
ns
ns
Ω
Ω
Ω
Ω
V
V
V
V
V
V
V
V
V