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參數(shù)資料
| 型號： | LT1144 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Octal Bus Transceivers With 3-State Outputs 20-PDIP 0 to 70 |
| 中文描述： | 開關(guān)電容寬輸入范圍電壓轉(zhuǎn)換器，帶有關(guān)斷 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 206K |
| 代理商： | LT1144 |
4
LTC1144
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
Power Conversion Efficiency and
Supply Current vs Load Current
OSCILLATOR FREQUENCY (kHz)
0.1
0
O
)
2000
3000
1
10
100
LTC1144 TPC12
1000
1
μ
F
10
μ
F
100
μ
F
T
A
= 25°C
V
+
= 15V
OSCILLATOR FREQUENCY (kHz)
0.1
70
P
90
95
100
1
10
100
LTC1144 TPC11
85
80
75
T
= 25°C, V
+
= 15V
BOOST = OPEN
I
L
= 20mA
I
L
= 3mA
1
μ
F
1
μ
F
10
μ
F
10
μ
F
100
μ
F
100
μ
F
Power Conversion Efficiency
vs Oscillator Frequency
Output Resistance
vs Oscillator Frequency
Output Voltage vs Load Current
LOAD CURRENT (mA)
–10
O
–5
0
0.001
0.1
1
100
LTC1144 TPC15
–15
0.01
10
V
+
= 15V
T
A
= 25°C
C1 = C2
BOOST = 15V
BOOST = OPEN
0.1
μ
F
0.1
μ
F
1
μ
F
1
μ
F
10
μ
F
10
μ
F
Output Voltage vs Load Current
LOAD CURRENT (mA)
–4
O
–3
–2
–1
0
0.001
0.1
1
100
LTC1144 G14
–5
0.01
10
0.1
μ
F
0.1
μ
F 10
μ
F
10
μ
F
1
μ
F
1
μ
F
V
+
= 5V
T
= 25°C
C1 = C2
BOOST = 5V
BOOST = OPEN
LOAD CURRENT (mA)
0.01
0
R
500
1000
1
μ
F
1
μ
F
1500
0.1
1
LTC1144 TPC13
10
100
0.1
μ
F
10
μ
F
10
μ
F
V
+
= 5V
T
= 25°C
C1 = C2
BOOST = 5V
BOOST =
OPEN
0.1
μ
F
Ripple Voltage vs Load Current
PI FU
Boost (Pin 1):
This pin will raise the oscillator frequency
by a factor of 10 if tied high.
CAP
+
(Pin 2):
Positive Terminal for Pump Capacitor.
GND (Pin 3):
Ground Reference.
CAP
–
(Pin 4):
Negative Terminal for Pump Capacitor.
V
OUT
(Pin 5):
Output of the Converter.
U
SHDN (Pin 6):
Shutdown Pin. Tie to V
+
pin or leave floating
for normal operation. Tie to ground when in shutdown
mode.
OSC (Pin 7):
Oscillator Input Pin. This pin can be overdriven
with an external clock or can be slowed down by connect-
ing an external capacitor between this pin and ground.
V
+
(Pin 8):
Input Voltage.
LOAD CURRENT (mA)
0
P
S
60
80
100
16
LTC1144 TPC10
40
20
0
30
40
50
20
10
0
4
8
12
20
P
EFF
I
S
T
A
= 25°C
V
+
= 5V
C1 = C2 = 10
μ
F
BOOST = OPEN
(SEE TEST CIRCUIT)
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