LTC1736IG Linear Technology, LTC1736IG Datasheet - Page 2

• Manufacturer Part Number: LTC1736IG
• Description: IC REG SW SYNC STEPDWN HE 24SSOP
• Manufacturer: Linear Technology

Specifications of LTC1736IG

• Applications: Converter, Intel Pentium® II, III
• Voltage - Input: 3.5 ~ 36 V
• Number Of Outputs: 1
• Voltage - Output: 0.93 ~ 2 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

temperature range, otherwise specifications are at T
LTC1736
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (V
Topside Driver Supply Voltage (BOOST)....42V to – 0.3V
Switch Voltage (SW) ....................................36V to – 5V
EXTV
SENSE
FCB Voltage ............................(INTV
I
RUN/SS, VID0 to VID4, PGOOD Voltages ....7V to – 0.3V
Peak Driver Output Current <10 s (TG, BG) .............. 3A
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
SYMBOL
Main Control Loop
V
g
V
I
V
I
V
V
I
I
UVLO
I
t
TG t
TG t
2
FCB
Q
RUN/SS
SCL
SENSE
ON(MIN)
TH
m
OSENSE
FCB
OVL
RUN/SS
RUN/SS
V
V
V
LINEREG
LOADREG
SENSE(MAX)
LTC1736C ............................................... 0 C to 85 C
LTC1736I ............................................ – 40 C to 85 C
, V
r
f
CC
CC
OSENSE
+
, VIDV
Output Current ......................................... 50mA
, SENSE
, V
PARAMETER
Output Voltage Set Accuracy
Reference Voltage Line Regulation
Output Voltage Load Regulation
Transconductance Amplifier g
Forced Continuous Threshold
Forced Continuous Current
Feedback Overvoltage Lockout
Input DC Supply Current
Run Pin Start Threshold
Run Pin Begin Latchoff Threshold
Soft-Start Charge Current
RUN/SS Discharge Current
Undervoltage Lockout
Maximum Current Sense Threshold
SENSE Pins Total Source Current
Minimum On-Time
TG Transition Time:
CC
Rise Time
Fall Time
FB
, (BOOST – SW) Voltages ..7V to – 0.3V
Normal Mode
Shutdown
–
.......................... 1.1(INTV
Voltage .........................2.7V to – 0.3V
W
IN
).........................36V to – 0.3V
W W
m
CC
+ 0.3V) to – 0.3V
CC
U
A
CONDITIONS
(Note 3) See Table 1
V
(Note 3)
Measured in Servo Loop; V
Measured in Servo Loop; V
V
(Note 4)
V
V
V
V
Soft Short Condition, V
V
Measured at V
V
V
Tested with a Square Wave (Note 8)
(Note 9)
C
C
) to – 0.3V
IN
FCB
RUN/SS
RUN/SS
RUN/SS
RUN/SS
RUN/SS
FB
SENSE
LOAD
LOAD
= 25 C. V
= 3.6V to 30V (Note 3)
= 0.7V
= 0.85V
= 3300pF
= 3300pF
The
–
, Ramping Positive
, Ramping Positive
= 0V
= 0V
= 4.5V
= V
SENSE
IN
denotes specifications which apply over the full operating
IN
= 15V, V
Pin (V
+
= 0.8V
PACKAGE/ORDER I FOR ATIO
Consult factory for Military grade parts.
IN
FB
V
SENSE
SENSE
RUN/SS
PGOOD
RUN/SS
OSENSE
Ramping Down)
= 0.5V,
SGND
C
VID0
VID1
ITH
ITH
OSC
FCB
V
I
TH
FB
–
+
T
= 0.7V
= 2V
JMAX
24-LEAD PLASTIC SSOP
10
11
12
= 5V unless otherwise noted.
1
2
3
4
5
6
7
8
9
= 125 C,
G PACKAGE
TOP VIEW
JA
= 110 C/W
24
23
22
21
20
19
18
17
16
15
14
13
TG
BOOST
SW
V
INTV
BG
PGND
EXTV
VIDV
VID4
VID3
VID2
IN
– 0.7
0.76
0.84
MIN
1.0
0.5
60
CC
CC
CC
U
– 0.17
0.001
– 0.1
0.86
– 1.2
TYP
450
160
1.3
0.8
1.5
4.1
3.5
60
50
50
15
75
0.1
2
ORDER PART
LTC1736CG
LTC1736IG
NUMBER
W
MAX
0.02
– 0.3
0.84
– 0.3
0.88
200
1.9
4.5
3.9
25
85
80
90
90
0.3
1
4
UNITS
mmho
U
%/V
mV
ns
ns
ns
%
%
%
V
A
V
A
A
V
V
A
A
V
A