LT1676 Linear Technology, LT1676 Datasheet - Page 2

• Manufacturer Part Number: LT1676
• Description: Wide Input Range/ High Efficiency/ Step-Down Switching Regulator
• Manufacturer: Linear Technology

ABSOLUTE
The
LT1676
(Note 1)
Supply Voltage ........................................................ 60V
Switch Voltage ......................................................... 60V
SHDN, SYNC Pin Voltage ........................................... 7V
V
FB Pin Voltage ........................................................... 3V
Operating Junction Temperature Range
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
ELECTRICAL CHARACTERISTICS
V
SYMBOL
Power Supplies
V
I
I
V
Feedback Amplifier
V
I
g
I
V
Output Switch
V
I
Current Amplifier
2
VIN
VCC
IN
SRC
LIM
m
IN(MIN)
VCC
REF
CL
ON
IN
CC
LT1676C ................................................ 0 C to 125 C
LT1676I ............................................ – 40 C to 125 C
= 48V, V
, I
Pin Voltage ....................................................... 30V
SNK
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
SW
PARAMETER
Minimum Input Voltage
V
V
V
Shutdown Mode I
Reference Voltage
FB Pin Input Bias Current
Feedback Amplifier Transconductance
Feedback Amplifier Source or Sink Current
Feedback Amplifier Clamp Voltage
Reference Voltage Line Regulation
Voltage Gain
Output Switch On Voltage
Switch Current Limit
Control Pin Threshold
Control Voltage to Switch Transconductance
IN
CC
CC
open, V
Supply Current
Supply Current
Dropout Voltage
W
MAXIMUM
CC
= 5V, V
VIN
W W
C
= 1.4V unless otherwise noted.
RATINGS
U
CONDITIONS
V
V
(Note 2)
V
12V V
I
(Note 3)
Duty Cycle = 0%
SW
C
C
SHDN
lc = 10 A
= 0V
= 0V
= 0.5A
= 0V
IN
60V
PACKAGE/ORDER
Consult factory for Military grade parts.
SHDN
N8 PACKAGE
8-LEAD PDIP
GND
V
V
T
T
SW
CC
JMAX
JMAX
1
2
3
4
= 125 C,
= 125 C,
TOP VIEW
JA
JA
= 130 C/ W (N8)
= 110 C/ W (S8)
8-LEAD PLASTIC SO
S8 PACKAGE
8
7
6
5
V
FB
SYNC
V
C
IN
1.225
1.215
0.55
MIN
400
200
200
0.9
60
45
INFORMATION
U
S8 PART MARKING
1.240
0.70
TYP
620
600
650
100
600
6.7
3.2
2.8
2.0
1.0
1.1
30
2
ORDER PART
A
LT1676CN8
LT1676CS8
LT1676IN8
LT1676IS8
= 25 C.
NUMBER
W
1676
1676I
1.255
1.265
MAX
1500
1000
1500
0.01
1.25
800
900
170
220
7.0
7.4
4.0
5.0
3.1
1.5
1.0
75
50
UNITS
U
mho
mho
%/V
V/V
A/V
mA
mA
nA
V
V
A
A
V
A
A
V
V
A
A
V
V
A
V