Datasheet

LT3740
2
3740fc
ABSOLUTE MAXIMUM RATINGS
SN
, BGATE, V
C
, FB, XREF, PGOOD Voltages .............10V
V
IN
,
SHDN, SW, Range Voltages ...............................22V
BIAS, TGATE, BGDP, SN
+
Voltages ............................32V
SWB Voltage ............................................................36V
Maximum Junction Temperature........................... 125°C
Operating Temperature Range (Note 2)....40°C to 85°C
Storage Temperature Range ...................65°C to 125°C
(Note 1)
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
IN
= 5V unless otherwise noted. (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operation Voltage
2.2 V
Maximum Operation Voltage
22 V
Input Supply Current SHDN = 0V
SHDN = 5V, BIAS = 14V, FB = 1.5V
0.6
2.5
µA
mA
Feedback Reference Voltage XREF=1V
794 800 808 mV
Feedback Voltage Line Regulation V
IN
= 2.5V to 22V 0.006 %
FB Pin Input Current FB = 800mV 230 nA
Error Amplifi er Transconductance V
C
= 1.2V 380 µS
Controller Switching Frequency
260 300 330 kHz
Minimum BGATE On Time (Note 3) 500 700 ns
Current Limit RANGE = 0V
RANGE = Open
RANGE = V
IN
25
55
80
50
80
105
85
115
140
mV
mV
mV
Reverse Current Limit 35 mV
PIN CONFIGURATION
16
15
14
13
12
11
10
9
17
1
2
3
4
5
6
7
8
V
C
FB
XREF
SHDN
PGOOD
RANGE
V
IN
SWB
SN
PGND
BGATE
BGDP
SN
+
SW
TGATE
BIAS
TOP VIEW
DHC PACKAGE
16-LEAD (5mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD IS GND (PIN 17), MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3740EDHC#PBF LT3740EDHC#TRPBF 3740
16-Lead (5mm × 3mm) Plastic DFN
40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3740EDHC LT3740EDHC#TR 3740
16-Lead (5mm × 3mm) Plastic DFN
40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/