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参数资料
| 型号： | LTC1551CS8-4.1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/12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 |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | -4.1V |
| 输入电压： | 4.5 V ~ 6.5 V |
| 频率 - 开关： | 900kHz |
| 电流 - 输出： | 20mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°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 |
LTC1550/LTC1551
TYPICAL PERFOR M A N CE CHARACTERISTICS
10
Spot Noise
(See Figure 2, C OUT = 10 μ F)
90
Output Spectrum
(See Figure 2, C OUT = 22 μ F)
10
Spot Noise
(See Figure 2, C OUT = 22 μ F)
1
V CC = 5V
I L = 5mA
C IN = 4.7 μ F
C OUT = 10 μ F
C L = 0.1 μ F
80
70
60
V CC = 5V
I L = 5mA
C IN 4.7 μ F
C OUT = 22 μ F
C L = 0.1 μ F
1
V CC = 5V
I L = 5mA
C IN = 4.7 μ F
C OUT = 22 μ F
C L = 0.1 μ F
50
40
30
0.1
20
10
0
0.1
0.01
1
10
100
–10
100k
1M
10M
0.01
1
10
100
FREQUENCY (kHz)
PI N FU N CTIO N S
LTC1550/51 ? G12
FREQUENCY (Hz)
LT1550/51 ? G13
FREQUENCY (kHz)
LTC1550/51 ? G14
SHDN: Shutdown (TTL Compatible). This pin is active low
(SHDN) for the LTC1550 and active high (SHDN) for the
LTC1551. When this pin is at V CC (GND for LTC1551), the
LTC1550 operates normally. When SHDN is pulled low
(high for LTC1551), the LTC1550 enters shutdown mode.
In shutdown, the charge pump stops, the output collapses
to 0V, and the quiescent current drops typically to 0.2 μ A.
V CC : Power Supply. V CC requires an input voltage between
4.5V and 6.5V for the fixed voltage LTC1550CS8-4.1/
LTC1551CS8-4.1. The adjustable voltage LTC1550CGN/
LTC1550IGN operates with a VCC range of 2.7V to 6.5V.
Output voltage and output load current conditions depend
on the VCC supply voltage. Consult the Electrical Charac-
teristics table and Typical Performance Characteristics for
guaranteed test points. The difference between the input
voltage and output should never be set to exceed 14V or
damage to the chip may occur. V CC must be bypassed to
PGND (GND for 8-pin packages) with at least a 0.1 μ F
capacitor placed in close proximity to the chip. A 4.7 μ F or
larger bypass capacitor is recommended to minimize
noise and ripple at the output.
C1 + : C1 Positive Input. Connect a 0.1 μ F capacitor between
C1 + and C1 – .
V OUT : Negative Voltage Output. This pin must be bypassed
to ground with a 4.7 μ F or larger capacitor to ensure
regulator loop stability. At least 10 μ F is recommended to
provide specified output ripple. An additional 0.1 μ F low
ESR capacitor is recommended to minimize high fre-
quency spikes at the output.
C1 – : C1 Negative Input. Connect a 0.1 μ F capacitor from
C1 + to C1 – .
GND: Ground. Connect to a low impedance ground. A
ground plane will help minimize regulation errors.
CP OUT : Negative Charge Pump Output. This pin requires a
0.1 μ F storage capacitor to ground.
SENSE: Connect to V OUT . The LTC1550/LTC1551 internal
regulator uses this pin to sense the output voltage. For
optimum regulation, SENSE should be connected close to
the output load.
SSOP PACKAGE ONLY
PGND: Power Ground. Connect to a low impedance ground.
PGND should be connected to the same potential as
AGND.
AGND: Analog Ground. Connect to a low impedance
ground. AGND should be connected to a ground plane to
minimize regulation errors.
5
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| LTC1551LCMS8 | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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 |
| LTC1551LCMS8#PBF | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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 |
| LTC1551LCMS8#TR | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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 |
| LTC1551LCMS8#TRPBF | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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 |
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