LTC1775 LINER [Linear Technology], LTC1775 Datasheet - Page 2

• Manufacturer Part Number: LTC1775
• Description: High Power No RSENSE TM Current Mode Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

ABSOLUTE AXI U RATI GS
LTC1775
(Note 1)
Input Supply Voltage (V
Boosted Supply Voltage (BOOST) ............. 42V to – 0.3V
Boosted Driver Voltage (BOOST – SW) ...... 7V to – 0.3V
Switch Voltage (SW) ....................................36V to – 5V
EXTV
I
FCB, RUN/SS, SYNC Voltages .....................7V to – 0.3V
V
Peak Driver Output Current < 10 s (TG, BG) ............ 2A
INTV
Operating Ambient Temperature Range
Junction Temperature (Note 2) ............................. 125 C
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
ELECTRICAL CHARACTERISTICS
range, otherwise specifications are at T
SYMBOL
Main Control Loop
I
V
V
V
V
I
V
I
I
V
I
2
TH
IN
FCB
PROG
Q
RUN/SS
OUT
LINEREG
LOADREG
FCB
OVL
RUN/SS
V
OSENSE
V
SENSE(MAX)
LTC1775C .............................................. 0 C to 70 C
LTC1775I (Note 5) .............................. – 40 C to 85 C
OSENSE
Voltage ................................................2.7V to – 0.3V
CC
CC
Output Current ........................................ 50mA
Voltage ...........................................7V to – 0.3V
, V
PROG
PARAMETER
Feedback Current
Regulated Output Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Forced Continuous Threshold
Forced Continuous Bias Current
Output Overvoltage Lockout
V
Input DC Supply Current
RUN/SS Pin Threshold
Soft Start Current Source
Maximum Current Sense Threshold
PROG
1.19V (Adjustable) Selected
3.3V Selected
5V Selected
3.3V V
5V V
Normal Mode
Shutdown
Voltages ........(INTV
Input Current
W
OUT
OUT
IN
, TK) ................. 36V to – 0.3V
W W
A
= 25 C. V
CC
+ 0.3V) to – 0.3V
U
IN
CONDITIONS
V
I
V
V
V
V
V
I
I
V
V
V
V
V
EXTV
V
V
V
TH
TH
TH
= 15V unless otherwise noted.
PROG
PROG
PROG
PROG
IN
PROG
FCB
FCB
PROG
PROG
PROG
RUN/SS
RUN/SS
OSENSE
= 1.19V (Note 3)
= 2V (Note 3)
= 0.5V (Note 3)
= 4V to 20V, I
Ramping Negative
= 1.19V
CC
The
Pin Open, I
Pin Open
= 0V
= INTV
Pin Open
Pin Open
= 0V
= 5V
= 5V (Note 4)
= 0V, 4V < V
= 0V
= 1V, V
CC
denotes specifications which apply over the full operating temperature
PROG
TH
TH
PACKAGE/ORDER I FOR ATIO
Consult factory for Military grade parts.
= 1.19V (Note 3),
= 1.19V (Note 3)
IN
Pin Open
< 15V
V
16-LEAD NARROW
RUN/SS
EXTV
OSENSE
V
PLASTIC SSOP
SGND
SYNC
GN PACKAGE
PROG
T
T
FCB
I
JMAX
JMAX
CC
TH
= 125 C,
= 125 C,
1
2
3
4
5
6
7
8
TOP VIEW
JA
JA
16-LEAD PLASTIC SO
= 130 C/W (GN)
= 110 C/W (S)
S PACKAGE
16
15
14
13
12
11
10
9
1.178
3.220
4.900
1.16
1.24
–1.2
MIN
260
0.8
V
TK
SW
TG
BOOST
INTV
BG
PGND
IN
CC
U
– 0.020
1.190
3.300
5.000
0.001
1.19
1.28
– 3.5
–2.5
TYP
0.035
500
300
1.4
– 1
10
15
3.5
GN PART MARKING
ORDER PART
LTC1775CGN
LTC1775CS
LTC1775IGN
LTC1775IS
W
NUMBER
1.202
3.380
5.100
1775
1775I
MAX
0.01
– 0.2
1.22
1.32
340
– 2
– 7
50
30
–4
0.2
2
7
UNITS
U
%/V
mV
nA
%
%
V
V
V
V
A
V
A
A
A
A
V
A