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| 型号： | MCP1253T-ADJI/MS |
| 厂商： | Microchip Technology |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 8MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压），切换电容（充电泵） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.5 V ~ 5.5 V |
| 输入电压： | 2 V ~ 5.5 V |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 120mA |
| 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-MSOP |
MCP1252/3
3.0
PIN FUNCTIONS
3.6
Flying Capacitor Positive Terminal
(C+)
TABLE 3-1:
PIN FUNCTION TABLE
The charge pump capacitor (flying capacitor) is used to
V IN
Pin
No.
1
2
3
Name Function
PGOOD Open-Drain Power GOOD Output
V OUT Regulated Output Voltage
Power Supply Input
transfer charge from the input supply to the regulated
output.
Proper orientation is imperative when using a polarized
capacitor.
3.7 Shutdown Input (SHDN)
4
5
6
GND
C-
C+
Ground Terminal
Flying Capacitor Negative Terminal
Flying Capacitor Positive Terminal
A logic-low signal applied to SHDN disables the device.
A logic-high signal applied to this pin allows normal
operation.
7
SHDN
Shutdown Mode, Active-Low Input
3.8
Select (SELECT) Input or
8
SELECT Output Voltage Select Pin.
(MCP1252-33X50, MCP1253-33X50)
Feedback (FB) Input
FB
Feedback Input Pin for Adjustable Output
(MCP1252-ADJ, MCP1253-ADJ)
MCP1252-33X50, MCP1253-33X50:
SELECT : Select Input Pin.
3.1
Open-Drain Power Good Output
(PGOOD)
Connect SELECT to V IN for 3.3V fixed output. Connect
SELECT to GND for a 5.0V fixed output.
MCP1252-ADJ, MCP1253-ADJ:
PGOOD is a high-impedance when the output voltage
is in regulation. A logic-low is asserted when the output
falls 7% (typical) below the nominal value. The PGOOD
output remains low until V OUT is within 3% (typical) of
its nominal value. On start-up, this pin indicates when
the output voltage reaches its final value. PGOOD is
high-impedance when SHDN is low.
FB : Feedback Pin.
A resistor divider connected to this pin determines the
adjustable V OUT value (1.5V to 5.5V).
3.2
Regulated Output Voltage (V OUT )
Bypass to GND with a filter capacitor.
3.3
Power Supply Input (V IN )
It is recommended that V IN be tied to a ceramic bypass
capacitor.
3.4
Ground (GND)
It is recommended that the ground pin be tied to a
ground plane for best performance.
3.5
Flying Capacitor Negative
Terminal (C-)
The charge pump capacitor (flying capacitor) is used to
transfer charge from the input supply to the regulated
output.
It is recommended that a low ESR (equivalent series
resistance) capacitor be used.
DS21752A-page 8
? 2002 Microchip Technology Inc.
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相关代理商/技术参数 |
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|---|---|
| MCP1256 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Regulated 3.3V, Low-Ripple Charge Pump with Low- Operating Current SLEEP Mode or BYPASS Mode |
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| MCP1256_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Regulated 3.3V, Low-Ripple Charge Pump with Low- Operating Current SLEEP Mode or BYPASS Mode |
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| MCP1256-E/UN | 功能描述:电荷泵 Frac Charge Pump w/ PG and Sleep RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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