LTC1265 LINER [Linear Technology], LTC1265 Datasheet - Page 2

• Manufacturer Part Number: LTC1265
• Description: 1.2A, High Efficiency Step-Down DC/DC Converter
• Manufacturer: LINER [Linear Technology]

LTC1265/LTC1265-3.3/LTC1265-5
ABSOLUTE
(Voltages Refer to GND Pin) (Note 1)
Input Supply Voltage (Pins 1, 2, 13) ..........– 0.3V to 13V
DC Switch Current (Pin 14) .................................... 1.2A
Peak Switch Current (Pin 14) ................................. 1.6A
Switch Voltage (Pin 14) .................................. V
Operating Temperature Range
Junction Temperature (Note 2) ............................. 125 C
Storage Temperature Range ....................– 65 to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
I
V
V
I
V
I
I
V
R
I
t
2
FB
Q
LBIN
LBOUT
5
OFF
FB
OUT
V
LBTRIP
8
ON
OUT
– V
LTC1265C ............................................... 0 to 70 C
LTC1265I ........................................ – 40 C to 85 C
7
PARAMETER
Feedback Current into Pin 9
Feedback Voltage
Regulator Output Voltage
Output Voltage Line Regulation
Output Voltage Load Regulation
Burst Mode Operation Output Ripple
Input DC Supply Current (Note 3)
Low-Battery Trip Point
Current into Pin 4
Current Sunk by Pin 3
Current Sense Threshold Voltage
ON Resistance of Switch
C
Switch Off Time (Note 4)
T
Pin Discharge Current
W
MAXIMUM
W W
RATINGS
CONDITIONS
LTC1265
LTC1265C
V
LTC1265-3.3: I
LTC1265-5: I
V
LTC1265-3.3: 10mA < I
LTC1265-5: 10mA < I
I
Active Mode: 3.5V < V
Sleep Mode: 3.5V < V
Sleep Mode: 5V < V
Shutdown: V
V
V
LTC1265: V
LTC1265-3.3: V
LTC1265-5: V
LTC1265C
LTC1265I
V
V
C
C
LOAD
IN
IN
LBOUT
LBOUT
OUT
OUT
T
T
= 390pF, I
= 390pF, I
U
= 9V, LTC1265I
= 6.5V to 10V, I
A
in Regulation, V
= 0V
= 0mA
= 25 C. V
= 0.4V, V
= 5V, V
IN
V
– 13.0
SENSE
SENSE
The
V
SHDN
LOAD
LOAD
LOAD
SENSE
SENSE
V
LBIN
LOAD
SENSE
SENSE
LBIN
–
–
IN
= 800mA
= V
= 800mA (LTC1265C)
= 800mA (LTC1265I)
= 5V, V
= 5V, V
–
LOAD
= 10V
–
IN
denotes the specifications which apply over the full operating
= 800mA
= 10V, V
= V
–
= V
= 0V
SENSE
LOAD
IN
IN
–
IN
< 10V (LTC1265-5)
= V
, 3.5V < V
= V
LOAD
< 10V
OUT
< 10V
OUT
= 800mA
PACKAGE/ORDER
Consult factory for Military grade parts.
9
9
OUT
OUT
< 800mA
–
= V
= V
+ 100mV (Forced)
= V
< 800mA
– 100mV (Forced)
PWR V
SENSE
+ 100mV (Forced)
SHDN
– 100mV (Forced)
LB
OUT
OUT
OUT
LB
OUT
IN
V
*ADJUSTABLE OUTPUT VERSION
I
C
TH
/4 + 25mV (Forced)
/4 – 25mV (Forced)
IN
IN
IN
T
T
–
JMAX
< 10V
= 0V, unless otherwise specified.
1
2
3
4
5
6
7
14-LEAD PLASTIC SO
= 125 C,
TOP VIEW
S PACKAGE
JA
= 110 C/W
14
13
12
11
10
9
8
SW
PWR V
PGND
SGND
SHDN
N/C (V
SENSE
FB
+
IN
INFORMATION
*)
1.22
1.20
3.22
4.9
1.15
MIN
–40
130
130
130
U
0.5
3.5
40
4
LTC1265CS
LTC1265CS-5
LTC1265CS-3.3
LTC1265IS
1.25
1.25
1.25
TYP
160
160
150
150
150
PART NUMBER
0.2
3.3
1.8
1.0
0.3
0.3
40
60
50
25
25
25
60
5
0
5
2
5
5
W
ORDER
MAX
1.28
1.30
1.35
0.60
0.70
3.40
5.2
100
230
230
180
180
180
100
2.4
0.5
1.5
1.0
40
65
15
10
1
6
7
UNITS
mV
U
mA
mA
mV
mV
mV
mV
mV
mV
mV
mV
mV
P-P
A
V
V
V
V
A
A
A
V
A
A
A
A
s
s