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参数资料
| 型号： | LTC1516IS8 |
| 厂商： | Linear Technology |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP DBL 5V 8SOIC |
| 标准包装： | 100 |
| 类型： | 切换式电容器（充电泵），倍增器 |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 2 V ~ 5 V |
| 频率 - 开关： | 600kHz |
| 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： | 管件 |
| 供应商设备封装： | 8-SOIC |
LTC1516
APPLICATIO N S I N FOR M ATIO N
Ultralow Quiescent Current (I Q < 5 μ A) Regulated
Supply
The LTC1516 contains an internal resistor divider (refer to
Block Diagram) which draws only 1.5 μ A (typ) from V OUT .
During no-load conditions, the internal load causes a
droop rate of only 150mV per second on V OUT with
C OUT = 10 μ F. Applying a 5Hz to 100Hz, 95% to 98% duty
cycle signal to the SHDN pin ensures that the circuit of
Figure 3 comes out of shutdown frequently enough to
maintain regulation during no-load or low-load condi-
tions. Since the part spends nearly all of its time in
shutdown, the no-load quiescent current (see Figure 4a) is
approximately equal to (V OUT )(1.5 μ A)/(V IN )(Efficiency).
0.22 μ F
The LTC1516 must be out of shutdown for a minimum
duration of 200 μ s to allow enough time to sense the output
and keep it in regulation. As the V OUT load current
increases, the frequency with which the part is taken out
of shutdown must also be increased to prevent V OUT
from drooping below 4.8V during the OFF phase (see
Figure 4b). A 100Hz 98% duty cycle signal on the SHDN
pin ensures proper regulation with load currents as high
as 100 μ A. When load current greater than 100 μ A is
needed, the SHDN pin must be forced low as in normal
operation. The typical no-load supply current for this
circuit with V IN = 3V is only 3.2 μ A .
1
C1 +
C1 –
8
V IN = 2V TO 5V
+
10 μ F
+
2
3
10 μ F 4
V IN
V OUT
C2 +
SHDN
LTC1516
GND
C2 –
0.22 μ F
7
6
5
FROM MPU
SHDN PIN WAVEFORMS:
LOW I Q MODE (5Hz TO 100Hz, 95% TO 98% DUTY CYCLE) V OUT LOAD ENABLE MODE
I OUT ≤ 100 μ A (I OUT = 100 μ A TO 50mA)
1516 ? F03
V OUT = 5V ± 4%
Figure 3. Ultralow Quiescent Current (<5 μ A) Regulated Supply
6.0
4.0
2.0
0.0
1000
100
10
1
SHDN ON PULSE WIDTH = 200 μ s
C OUT = 10 μ F
2.0
3.0 4.0
INPUT VOLTAGE (V)
5.0
1516 ? F04a
1
10 100
OUTPUT CURRENT ( μ A)
1000
1516 ? F04b
Figure 4a. No Load I CC vs Input Voltage for Circuit in Figure 3
6
Figure 4b. Maximum SHDN OFF Time vs Output Load Current for
Ultralow I Q Operation
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| LTC1516IS8#PBF | 功能描述:IC REG SWITCHED CAP DBL 5V 8SOIC 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC1516IS8#TR | 功能描述:IC REG SWITCHED CAP DBL 5V 8SOIC 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC1516IS8#TRPBF | 功能描述:IC REG SWITCHED CAP DBL 5V 8SOIC 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC1517CS5-3.3 | 制造商:Linear Technology 功能描述:Charge Pump STPUP 3.3V 15mA 5-Pin TSOT-23 |
| LTC1517CS5-3.3#TR | 功能描述:IC REG SWITCHED CAP 3.3V SOT23-5 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 |
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