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參數資料
| 型號： | MCP1252 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Low Noise, Positive-Regulated Charge Pump |
| 中文描述： | 低噪聲，正調節電荷泵 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 440K |
| 代理商： | MCP1252 |
2002 Microchip Technology Inc.
DS21752A-page 1
M
MCP1252/3
Features
Inductorless, Buck/Boost, DC/DC Converter
Low Power: 80 μA (Typical)
High Output Voltage Accuracy:
- ±2.5% (V
OUT
Fixed)
120 mA Output Current
Wide Operating Temperature Range:
- -40°C to +85°C
Thermal Shutdown and Short-Circuit Protection
Uses Small Ceramic Capacitors
Switching Frequency:
- MCP1252: 650 kHz
- MCP1253: 1 MHz
Low Power Shutdown Mode: 0.1 μA (Typical)
Shutdown Input Compatible with 1.8V Logic
V
IN
Range: 2.0V to 5.5V
Selectable Output Voltage (3.3V or 5.0V) or
Adjustable Output Voltage
Space-saving, 8-Lead MSOP
Soft-Start Circuitry to Minimize In-Rush Current
Applications
White LED Backlighting
Color Display Bias
Local 3V-to-5V Conversions
Flash Memory Supply Voltage
SIM Interface Supply for GSM Phones
Smart Card Readers
PCMCIA Local 5V Supplies
Description
The MCP1252/3 are inductorless, positive-regulated
charge pump DC/DC converters. The devices generate
a regulated fixed (3.3V or 5.0V) or adjustable output
voltage. They are specifically designed for applications
requiring low noise and high efficiency and are able to
deliver up to 120 mA output current. The devices allow
the input voltage to be lower or higher than the output
voltage, by automatically switching between buck/
boost operation.
The MCP1252 has a switching frequency of 650 kHz,
avoiding interference with sensitive IF bands. The
MCP1253 has a switching frequency of 1 MHz and
allows the use of smaller capacitors than the
MCP1252, thus saving board space and cost.
Both devices feature a power-good output that can be
used to detect out-of-regulation conditions. Extremely
low supply current and low external parts count (three
capacitors) make these devices ideal for small, battery-
powered applications. A shutdown mode is also pro-
vided for further power reduction. The MCP1252 and
MCP1253 feature thermal and short-circuit protection
and are offered in space-saving, 8-lead, MSOP
packages.
Package Types
MSOP (FIXED)
MSOP (ADJUSTABLE)
PGOOD
V
OUT
V
IN
GND
SELECT
SHDN
C+
C-
1
2
3
4
8
7
6
5
PGOOD
V
OUT
V
IN
GND
FB
SHDN
C+
C-
1
2
3
4
8
7
6
5
MCP1252
MCP1253
MCP1252
MCP1253
Low Noise, Positive-Regulated Charge Pump
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MCP1252_13 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Low Noise, Positive-Regulated Charge Pump |
| MCP1252-33X50I/MS | 功能描述:電荷泵 120mA Regulated RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MCP1252-33X50I/MS | 制造商:Microchip Technology Inc 功能描述:DC/DC Charge Pump Converter (DC-DC) IC |
| MCP1252-ADJI/MS | 功能描述:電荷泵 120mA Regulated Adj RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MCP1252DM-BKLT | 功能描述:電源管理IC開發工具 MCP1252 Charge Pump Backlight Demo Brd RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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