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參數(shù)資料
| 型號： | LLTC1142HV |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準電壓源/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安培開關穩(wěn)壓器 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 261K |
| 代理商： | LLTC1142HV |
5
LTC1142/LTC1142L/LTC1142HV
LTC1142/LTC1142HV
SENSE
+
3 (Pin 1):
The (+) Input to the 3.3V Section
Current Comparator. A built-in offset between Pins 1 and
28 in conjunction with R
SENSE3
sets the current trip
threshold for the 3.3V section.
SHDN3 (Pin 2):
When grounded, the 3.3V section oper-
ates normally. Pulling Pin 2 high holds both MOSFETs off
and puts the 3.3V section in micropower shutdown mode.
Requires CMOS logic-level signal with t
r
, t
f
< 1
μ
s. Do not
“float” Pin 2.
PU
SGND3 (Pin 3):
The 3.3V section small-signal ground
must be routed separately from other grounds to the (–)
terminal of the 3.3V section output capacitor.
PGND3 (Pin 4):
The 3.3V section driver power ground
connects to source of N-channel MOSFET and the (–)
terminal of the 3.3V section input capacitor.
NC (Pin 5):
No Connection.
NDRIVE 3 (Pin 6):
High Current Drive for Bottom N-Channel
MOSFET, 3.3V Section. Voltage swing at Pin 6 is from
ground to V
IN3
.
Operating Frequency vs
V
IN
– V
OUT
Current Sense Threshold Voltage
Supply Current in Shutdown
Off-Time vs Output Voltage
DC Supply Current
Gate Charge Supply Current
INPUT VOLTAGE (V)
0
S
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0
2
10
14
1142 G07
8
18
4
6
12
16
PER REGULATOR BLOCK
NOT INCLUDING
GATE CHARGE CURRENT
PINS 10, 24
ACTIVE MODE
SLEEP MODE
INPUT VOLTAGE (V)
0
S
μ
A
20
18
16
14
12
10
8
6
4
2
0
2
10
14
1142 G08
8
18
4
6
12
16
PER REGULATOR BLOCK
PINS 10, 24
V
SHUTDOWN
= 2V
V
IN
– V
OUT
VOLTAGE (V)
0
N
12
1142 G09
2
6
8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
4
10
70
°
C
0
°
C
25
°
C
V
OUT
= 5V
TEMPERATURE (
°
C)
0
S
175
150
125
100
75
50
25
0
80
1142 G12
20
40
60
100
MAXIMUM
THRESHOLD
MINIMUM
THRESHOLD
OUTPUT VOLTAGE (V)
0
O
μ
s
80
70
60
50
40
30
20
10
0
4
1142 G11
1
2
3
5
V
SENSE
= V
OUT
V
OUT
= 5V
V
OUT
= 3.3V
OPERATING FREQUENCY (kHz)
20
G
140
28
24
20
16
12
8
4
0
1142 G10
80
260
200
Q
N
+ Q
P
= 100nC
Q
N
+ Q
P
= 50nC
TYPICAL PERFOR AU
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