2
LTC1265/LTC1265-3.3/LTC1265-5
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
SHDN
= 0V, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
FB
Feedback Current into Pin 9 LTC1265 0.2 1 µA
V
FB
Feedback Voltage LTC1265C ● 1.22 1.25 1.28 V
V
IN
= 9V, LTC1265I ● 1.20 1.25 1.30 V
V
OUT
Regulator Output Voltage LTC1265-3.3: I
LOAD
= 800mA ● 3.22 3.3 3.40 V
LTC1265-5: I
LOAD
= 800mA ● 4.9 5 5.2 V
∆V
OUT
Output Voltage Line Regulation V
IN
= 6.5V to 10V, I
LOAD
= 800mA –40 0 40 mV
Output Voltage Load Regulation LTC1265-3.3: 10mA < I
LOAD
< 800mA 40 65 mV
LTC1265-5: 10mA < I
LOAD
< 800mA 60 100 mV
Burst Mode Operation Output Ripple I
LOAD
= 0mA 50 mV
P-P
I
Q
Input DC Supply Current (Note 3) Active Mode: 3.5V < V
IN
< 10V 1.8 2.4 mA
Sleep Mode: 3.5V < V
IN
< 10V 160 230 µA
Sleep Mode: 5V < V
IN
< 10V (LTC1265-5) 160 230 µA
Shutdown: V
SHDN
= V
IN
, 3.5V < V
IN
< 10V 5 15 µA
V
LBTRIP
Low-Battery Trip Point 1.15 1.25 1.35 V
I
LBIN
Current into Pin 4 0.5 µA
I
LBOUT
Current Sunk by Pin 3 V
LBOUT
= 0.4V, V
LBIN
= 0V 0.5 1.0 1.5 mA
V
LBOUT
= 5V, V
LBIN
= 10V 1.0 µA
V
8
– V
7
Current Sense Threshold Voltage LTC1265: V
SENSE
–
= 5V, V
9
= V
OUT
/4 + 25mV (Forced) 25 mV
V
SENSE
–
= 5V, V
9
= V
OUT
/4 – 25mV (Forced) 130 150 180 mV
LTC1265-3.3: V
SENSE
–
= V
OUT
+ 100mV (Forced) 25 mV
V
SENSE
–
= V
OUT
– 100mV (Forced) 130 150 180 mV
LTC1265-5: V
SENSE
–
= V
OUT
+ 100mV (Forced) 25 mV
V
SENSE
–
= V
OUT
– 100mV (Forced) 130 150 180 mV
R
ON
ON Resistance of Switch LTC1265C ● 0.3 0.60 Ω
LTC1265I 0.3 0.70 Ω
I
5
C
T
Pin Discharge Current V
OUT
in Regulation, V
SENSE
–
= V
OUT
40 60 100 µA
V
OUT
= 0V 2 10 µA
t
OFF
Switch Off Time (Note 4) C
T
= 390pF, I
LOAD
= 800mA (LTC1265C) ● 456 µs
C
T
= 390pF, I
LOAD
= 800mA (LTC1265I) ● 3.5 5 7 µs
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
IN
– 13.0
Operating Temperature Range
LTC1265C ............................................... 0° to 70°C
LTC1265I ........................................ –40°C to 85°C
Junction Temperature (Note 2).............................125°C
Storage Temperature Range ....................–65° to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
(Voltages Refer to GND Pin) (Note 1)
ORDER PART
NUMBER
LTC1265CS
LTC1265CS-5
LTC1265CS-3.3
LTC1265IS
Consult factory for Military grade parts.
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
*ADJUSTABLE OUTPUT VERSION
T
JMAX
= 125°C, θ
JA
= 110°C/W
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PWR V
IN
V
IN
LB
OUT
LB
IN
C
T
I
TH
SENSE
–
SW
PWR V
IN
PGND
SGND
SHDN
N/C (V
FB
*)
SENSE
+
ABSOLUTE AXI U RATI GS
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PACKAGE/ORDER I FOR ATIO
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ELECTRICAL CHARACTERISTICS