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LT3741 Datasheet(PDF) 3 Page - Linear Technology

Part # LT3741
Description  High Power, Constant Current, Constant Voltage, Step-Down Controller
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3741 Datasheet(HTML) 3 Page - Linear Technology

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LT3741

3741f
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VEN/UVLO = 5V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range
l
6
36
V
VIN Pin Quiescent Current (Note 2)
Non-Switching Operation
Shutdown Mode
Not Switching
VEN/UVLO = 0V
l
1.8
0.1
2.5
1
mA
µA
EN/UVLO Pin Falling Threshold
1.49
1.55
1.61
V
EN/UVLO Hysteresis
130
mV
EN/UVLO Pin Current
VIN = 6V, EN/UVLO = 1.45V
5.5
µA
SYNC Pin Threshold
1.0
V
CTRL1 Pin Control Range
0
1.5
V
CTRL1 Pin Current
CTRL1 = 1.5V
100
nA
Reference
Reference Voltage (VREF Pin)
l
1.94
2
2.06
V
Inductor Current Sensing
Full Range SENSE+ to SENSE–
VCTRL1 = 1.5V
l
48
51
54
mV
SENSE+ Pin Current
50
nA
SENSE– Pin Current
With VOUT ~ 4V, VCTRL1 = 0V
10
µA
Internal VCC Regulator (VCC_INT Pin)
Regulation Voltage
l
4.7
5
5.2
V
NMOS FET Driver
Non-Overlap time HG to LG
100
ns
Non-Overlap time LG to HG
60
ns
Minimum On-Time LG
(Note 3)
50
ns
Minimum On-Time HG
(Note 3)
80
ns
Minimum Off-Time LG
(Note 3)
65
ns
High Side Driver Switch On-Resistance
Gate Pull Up
Gate Pull Down
VCBOOT – VSW = 5V
2.3
1.3
Ω
Ω
Low Side Driver Switch On-Resistance
Gate Pull Up
Gate Pull Down
VCC_INT = 5V
2.3
1.0
Ω
Ω
Switching Frequency
fSW
RT = 40kΩ
RT = 200kΩ
l
900
190
1000
218
1070
233
kHz
kHz
Soft-Start
Charging Current
11
µA
Voltage Regulation Amplifier
Input Bias Current
FB = 1.3V
850
nA
gm
800
µA/V
Feedback Regulation Voltage
CTRL1 = 1.5V, ISENSE– = 23µA
l
1.192
1.21
1.228
V



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