參數(shù)資料
型號(hào): LTC1265-5
廠商: Linear Technology Corporation
英文描述: 1.2A, High Efficiency Step-Down Current Mode DC/DC Converter(5V,12A,高效率,電流模式步降DC/DC變換器)
中文描述: 1.2A的,高效率降壓型電流模式的DC / DC轉(zhuǎn)換器(5V的,12A條,高效率,電流模式步降直流/直流變換器)
文件頁數(shù): 2/16頁
文件大小: 233K
代理商: LTC1265-5
2
LTC1265/LTC1265-3.3/LTC1265-5
The
G
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
I
FB
V
FB
PARAMETER
Feedback Current into Pin 9
Feedback Voltage
CONDITIONS
LTC1265
LTC1265C
V
IN
= 9V, LTC1265I
LTC1265-3.3: I
LOAD
= 800mA
LTC1265-5: I
LOAD
= 800mA
V
IN
= 6.5V to 10V, I
LOAD
= 800mA
LTC1265-3.3: 10mA < I
LOAD
< 800mA
LTC1265-5: 10mA < I
LOAD
< 800mA
I
LOAD
= 0mA
Active Mode: 3.5V < V
IN
< 10V
Sleep Mode: 3.5V < V
IN
< 10V
Sleep Mode: 5V < V
IN
< 10V (LTC1265-5)
Shutdown: V
SHDN
= V
IN
, 3.5V < V
IN
< 10V
MIN
TYP
0.2
1.25
1.25
3.3
5
0
40
60
50
1.8
160
160
5
1.25
MAX
1
1.28
1.30
3.40
5.2
40
65
100
UNITS
μ
A
V
V
V
V
mV
mV
mV
G
G
1.22
1.20
3.22
4.9
–40
V
OUT
Regulator Output Voltage
G
G
V
OUT
Output Voltage Line Regulation
Output Voltage Load Regulation
Burst Mode Operation Output Ripple
Input DC Supply Current (Note 3)
mV
P-P
mA
I
Q
2.4
230
230
15
1.35
0.5
1.5
1.0
μ
A
μ
A
μ
A
V
μ
A
mA
μ
A
mV
mV
mV
mV
mV
mV
μ
A
μ
A
μ
s
μ
s
V
LBTRIP
I
LBIN
I
LBOUT
Low-Battery Trip Point
Current into Pin 4
Current Sunk by Pin 3
1.15
V
LBOUT
= 0.4V, V
LBIN
= 0V
V
LBOUT
= 5V, V
LBIN
= 10V
LTC1265: V
SENSE–
= 5V, V
9
= V
OUT
/4 + 25mV (Forced)
V
SENSE–
= 5V, V
9
= V
OUT
/4 – 25mV (Forced)
LTC1265-3.3: V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
LTC1265-5: V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
LTC1265C
LTC1265I
V
OUT
in Regulation, V
SENSE–
= V
OUT
V
OUT
= 0V
C
T
= 390pF, I
LOAD
= 800mA (LTC1265C)
C
T
= 390pF, I
LOAD
= 800mA (LTC1265I)
0.5
1.0
V
8
– V
7
Current Sense Threshold Voltage
25
150
25
150
25
150
0.3
0.3
60
2
5
5
130
180
130
180
130
180
0.60
0.70
100
10
6
7
R
ON
ON Resistance of Switch
G
I
5
C
T
Pin Discharge Current
40
t
OFF
Switch Off Time (Note 4)
G
G
4
3.5
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
+
ABSOLUTEW
W
W
U
PACKAGE/ORDER U
U
W
ELECTRICAL CHARACTERISTICS
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