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): 3/16頁
文件大小: 233K
代理商: LTC1265-5
3
LTC1265/LTC1265-3.3/LTC1265-5
Note 3:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 4:
In applications where R
SENSE
is placed at ground potential, the
off time increases by approximately 40%.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LTC1265CS, LTC1265CS-3.3, LTC1265CS-5:
T
J
= T
A
+ (P
D
110
°
C/W)
LOAD CURRENT (A)
0.01
70
E
75
80
85
90
100
0.10
1.00
1265 G01
95
V
IN
= 5V
V
IN
= 9V
V
IN
= 12V
LTC1265-3.3
V
OUT
= 3.3V
R
SENSE
= 0.1
C
COIL = CTX33-4
INPUT VOLTAGE (V)
4
80
E
82
86
88
90
100
94
6
8
9
13
LTC1265 G03
84
96
98
92
5
7
10
11
12
I
LOAD
= 250mA
I
LOAD
= 800mA
LTC1265-3.3
R
SENSE
= 0.1
C
COIL = CTX33-4
INPUT VOLTAGE (V)
4
80
E
82
86
88
90
100
94
6
8
9
13
1265 G02
84
96
98
92
5
7
10
11
12
I
LOAD
= 250mA
I
LOAD
= 800mA
LTC1265-5
R
SENSE
= 0.1
C
T
COIL = CTX33-4
Switch Resistance
INPUT VOLTAGE (V)
3
0
R
(
)
0.1
0.3
0.4
0.5
7
11
13
0.9
1265 G05
0.2
5
9
6
10
12
4
8
0.6
0.7
0.8
T
J
= 70
°
C
T
J
= 125
°
C
T
J
= 25
°
C
T
J
= 0
°
C
(V
IN –
V
OUT
) VOLTAGE (V)
0
N
0.4
0.8
1.2
1.0
0.6
0.2
2
1
4
6
8
1265 G04
10
0
3
5
7
9
0
°
C
25
°
C
70
°
C
Operating Frequency
vs (V
IN
– V
OUT
)
Efficiency vs Input Voltage
(V
OUT
= 3.3V)
Efficiency vs Input Voltage
(V
OUT
= 5V)
Efficiency vs Load Current
Switch Leakage Current
TEMPERATURE (
°
C)
0
L
180
240
300
270
210
150
90
30
80
1265 G06
120
60
0
20
40
60
100
V
IN
= 12V
SYMBOL
V
IH
V
IL
I
10
PARAMETER
Shutdown Pin High
Shutdown Pin Low
Shutdown Pin Input Current
CONDITIONS
Min Voltage at Pin 10 for Device to be in Shutdown
Max Voltage at Pin 10 for Device to be Active
V
SHDN
= 8V
MIN
1.2
TYP
MAX
UNITS
V
V
0.6
0.5
μ
A
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.
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR U
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