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参数资料
| 型号： | LTC1144IS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP INV 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 切换式电容器（充电泵），反相 |
| 输出数： | 1 |
| 输入电压： | 2 V ~ 18 V |
| 频率 - 开关： | 4kHz ~ 10kHz |
| 电流 - 输出： | 50mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LTC1144
TYPICAL PERFOR M A N CE CHARACTERISTICS
Power Conversion Efficiency and
Supply Current vs Load Current
Power Conversion Efficiency
vs Oscillator Frequency
Output Resistance
vs Oscillator Frequency
100
80
P EFF
50
40
100
95
1 00 μ F
1 00 μ F
T A = 25°C, V + = 15V
BOOST = OPEN
3000
T A = 25°C
V + = 15V
10 μ F
90
2000
60
30
85
10 μ F
1 0 μ F
1 μ F
1 μ F
40
20
0
0
4
8
I S
T A = 25°C
V + = 5V
C1 = C2 = 10 μ F
BOOST = OPEN
(SEE TEST CIRCUIT)
12 16 20
20
10
0
80
75
70
0.1
I L = 3mA
1 μ F
I L = 20mA
1 10 100
1000
0
0.1
1 00 μ F
1 10
100
LOAD CURRENT (mA)
LTC1144 ? TPC10
Ripple Voltage vs Load Current
OSCILLATOR FREQUENCY (kHz)
LTC1144 ? TPC11
Output Voltage vs Load Current
OSCILLATOR FREQUENCY (kHz)
LTC1144 ? TPC12
Output Voltage vs Load Current
1500
V + = 5V
0
V + = 5V
0
V + = 15V
1000
500
T A = 25°C
C1 = C2
BOOST = 5V
BOOST =
OPEN
0.1 μ F
1 μ F
0.1 μ F
10 μ F
1 μ F
–1
–2
–3
T A = 25°C
C1 = C2
BOOST = 5V
BOOST = OPEN
0.1 μ F
0.1 μ F 10 μ F
1 μ F
1 μ F
10 μ F
–5
–10
T A = 25°C
C1 = C2
BOOST = 15V
BOOST = OPEN
0.1 μ F
0.1 μ F
1 μ F
–4
1 μ F
0
10 μ F
–5
–15
10 μ F
10 μ F
0.01
0.1 1
10
100
0.001
0.01
0.1 1
10
100
0.001
0.01
0.1 1
10
100
LOAD CURRENT (mA)
PI FU CTIO S
LTC1144 ? TPC13
LOAD CURRENT (mA)
LTC1144 ? G14
LOAD CURRENT (mA)
LTC1144 ? TPC15
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.
4
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.
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