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