参数资料
型号: LTC1502IS8-3.3#TR
厂商: Linear Technology
文件页数: 4/8页
文件大小: 0K
描述: IC REG SWITCHED CAP 3.3V 8SOIC
标准包装: 2,500
类型: 切换式电容器(充电泵)
输出类型: 固定
输出数: 1
输出电压: 3.3V
输入电压: 0.9 V ~ 1.8 V
频率 - 开关: 500kHz
电流 - 输出: 10mA
同步整流器:
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
LTC1502-3.3
PI N FU N CTIO N S
C2 (Pin 1): Charge Pump 1 (CP1) Output. This pin also
serves as the input supply for charge pump 2 (CP2). To
ensure proper start-up, the C2 pin must not be externally
loaded. Bypass the C2 pin with a ≥ 10 μ F low ESR capacitor
to ground.
C1 + (Pin 2): Charge Pump 1 Flying Capacitor Positive
Terminal.
C1 – /SHDN (Pin 3): Charge Pump 1 Flying Capacitor Nega-
tive Terminal and Shutdown Input. Pulling this pin to
ground through a ≈ 100 ? resistor will put the part into
shutdown mode. With a high resistance pull-down FET,
the series resistor may be eliminated. The external pull-
down device must be high impedance for normal opera-
tion (see Applications Information). Peak voltage present
on this pin is approximately equal to V IN .
BLOCK DIAGRA M
GND (Pin 4): Ground. Connect to a ground plane for best
performance.
V IN (Pin 5): Input Supply Voltage. Bypass V IN with a ≥ 10 μ F
low ESR capacitor to ground.
C3 – (Pin 6): Charge Pump 2 (CP2) Flying Capacitor
Negative Terminal.
C3 + (Pin 7): Charge Pump 2 Flying Capacitor Positive
Terminal.
V OUT (Pin 8): 3.3V Regulated Output Voltage. V OUT is
disconnected from V IN during shutdown. Bypass V OUT
with a ≥ 10 μ F low ESR capacitor to ground.
SHUTDOWN
C1
C2
C3
C1 – /SHDN
3
2
C1 +
1
C2
C3 –
6
7
C3 +
V IN
C IN
5
2.5 μ A
CP1
400k
CP2
8
V OUT
C OUT
V IN
HIZ2
COMP3
U2
+
0.55V
HIZ1
1M
COMP2
2.1M
CLK1/CLK2
U4
SHDN
TIMING
CONTROL
OSCEN
U3
1.2M
C2
V OUT
BIAS
CONTROL
INTERNAL
V CC
COMP1
1.2V
REF
4
GND
1502-3.3 BD
4
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