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參數(shù)資料
| 型號(hào)： | LLTC1142HV |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大小： | 261K |
| 代理商： | LLTC1142HV |
4
LTC1142/LTC1142L/LTC1142HV
TYPICAL PERFOR AU
LTC1142, LTC1142HV
V
14
= V
OUT
+ 100mV (Forced)
V
14
= V
OUT
– 100mV (Forced)
25
150
0.8
5
mV
mV
125
0.55
3.8
175
2
6
V
SHDN
t
OFF
Shutdown Pin Threshold
Off-Time (Note 4)
V
C
T
= 390pF, I
LOAD
= 700mA
μ
s
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a 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 formula:
LTC1142CG: T
J
= T
A
+ (P
D
×
95
°
C/W)
Note 3:
This current is for one regulator block. Total supply current is the
sum of Pins 10 and 24 currents. Dynamic supply current is higher due to
the gate charge being delivered at the switching frequency. See the
Applications Information section.
Note 4:
In applications where R
SENSE
is placed at ground potential, the off-
time increases approximately 40%.
Note 5:
The LTC1142/LTC1142L/LTC1142HV are guaranteed to meet
specified performance from 0
°
C to 70
°
C and are designed, characterized
and expected to meet these extended temperature limits, but are not tested
at –40
°
C and 85
°
C. Guaranteed I-grade parts are available, consult the
factory.
Note 6:
The LTC1142L-ADJ allows operation down to V
IN
= 3.5V.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
5V Output Efficiency
3.3V Output Efficiency
5V Efficiency vs Input Voltage
3.3V Efficiency vs Input Voltage
Load Regulation
Line Regulation
LOAD CURRENT (A)
0.01
E
100
95
90
85
0.1
1
1142 G01
2
V
IN
= 6V
V
IN
= 10V
LOAD CURRENT (A)
0.01
E
100
95
90
85
0.1
1
1142 G02
2
V
IN
= 5V
V
IN
= 10V
INPUT VOLTAGE (V)
0
E
100
98
96
94
92
90
88
86
84
82
80
16
1142 G03
4
8
12
20
FIGURE 1 CIRCUIT
V
OUT
= 5V
I
LOAD
= 1A
I
LOAD
= 100mA
INPUT VOLTAGE (V)
0
E
100
98
96
94
92
90
88
86
84
82
80
16
1142 G04
4
8
12
20
FIGURE 1 CIRCUIT
V
OUT
= 3.3V
I
LOAD
= 1A
I
LOAD
= 100mA
INPUT VOLTAGE (V)
0
V
O
40
30
20
10
0
–10
–20
–30
–40
16
1142 G05
4
8
12
20
FIGURE 1 CIRCUIT
I
LOAD
= 1A
LOAD CURRENT (A)
0
V
O
20
0
–20
–40
–60
–80
–100
2.0
1142 G06
0.5
1.0
1.5
2.5
FIGURE 1 CIRCUIT
R
SENSE
= 0.05
V
IN
= 6V
V
IN
= 6V
V
IN
= 12V
V
OUT
= 5V
V
OUT
= 3.3V
V
IN
= 12V
–40
°
C
≤
T
A
≤
85
°
C (Note 5), V
10
= V
24
= 10V, unless otherwise noted.
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