Datasheet

LT1683
2
1683fd
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
IN
) .................................................20V
Gate Drive Current
.....................................Internal Limit
V5 Current
..................................................Internal Limit
SHDN Pin Voltage
.....................................................20V
Feedback Pin Voltage (Trans. 10ms) ...................... ±10V
Feedback Pin Current ............................................10mA
Negative Feedback Pin Voltage (Trans. 10ms) ......... ±10V
CS Pin
...........................................................................5V
GCL Pin
.......................................................................16V
SS Pin
...........................................................................3V
Operating Junction Temperature Range
(Note 3)
..................................................–40°C to 125°C
Storage Temperature Range
...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
.................. 300°C
(Note 1)
1
2
3
4
5
6
7
8
9
10
TOP VIEW
G PACKAGE
20-LEAD PLASTIC SSOP
20
19
18
17
16
15
14
13
12
11
GATE A
CAP A
GCL
CS
V5
SYNC
C
T
R
T
FB
NFB
PGND
GATE B
CAP B
V
IN
R
VSL
R
CSL
SHDN
SS
V
C
GND
T
JMAX
= 150°C, θ
JA
= 110°C/ W
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Error Amplifiers
V
REF
Reference Voltage Measured at Feedback Pin
l
1.235 1.250 1.265 V
I
FB
Feedback Input Current V
FB
= V
REF
l
250 1000 nA
FB
REG
Reference Voltage Line Regulation 2.7V ≤ V
IN
≤ 20V
l
0.012 0.03 %/V
V
NFR
Negative Feedback Reference Voltage Measured at Negative Feedback Pin
with Feedback Pin Open
l
–2.56 –2.500 –2.45 V
I
NFR
Negative Feedback Input Current V
NFB
= V
NFR
–37 –25 µA
NFB
REG
Negative Feedback Reference Voltage Line Regulation 2.7V ≤ V
IN
≤ 20V
l
0.009 0.03 %/V
g
m
Error Amplifier Transconductance ∆I
C
= ±50µA
l
1100
700
1500 2200
2500
µmho
µmho
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, V
C
= 0.9V, V
FB
= V
REF
, R
VSL
, R
CSL
= 16.9k, R
T
= 16.9k and
other pins open unless otherwise noted.
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1683EG#PBF LT1683EG#TRPBF 1683 20-Lead Plastic SSOP –40°C to 125°C
LT1683IG#PBF LT1683IG#TRPBF 1683 20-Lead Plastic SSOP – 40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1683EG LT1683EG#TR 1683 20-Lead Plastic SSOP –40°C to 125°C
LT1683IG LT1683IG#TR 1683 20-Lead Plastic SSOP –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/