Datasheet > MCP1252_14

MCP1252_14

更新时间： 2024-09-15 00:50:15

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
20页	562K
描述
Low-Noise, Positive-Regulated Charge Pump

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MCP1252_14 数据手册

MCP1252/3

Low-Noise, Positive-Regulated Charge Pump

Features:

Description:

• Inductorless, Buck/Boost, DC/DC Converter

• Low Power: 80 µA (Typical)

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.

• High Output Voltage Accuracy:

- ±2.5% (V_OUTFixed)

• 120 mA Output Current

• Wide Operating Temperature Range:

- Industrial Temperature (I): -40°C to +85°C

- Extended Temperature (E): -40°C to +125°C

• Thermal Shutdown and Short-Circuit Protection

• Uses Small Ceramic Capacitors

• Switching Frequency:

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.

- MCP1252: 650 kHz

- MCP1253: 1 MHz

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.

• Low-Power Shutdown Mode: 0.1 µA (Typical)

• Shutdown Input Compatible with 1.8V Logic

• V_INRange: 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

• AEC-Q100 Qualified

Package Types

Applications:

• White LED Backlighting

MSOP (Fixed)

• Color Display Bias

PGOOD

SELECT

SHDN

C+

• Local 3V-to-5V Conversions

• Flash Memory Supply Voltage

• SIM Interface Supply for GSM Phones

• Smart Card Readers

MCP1252

MCP1253

OUT

GND

C-

• PCMCIA Local 5V Supplies

MSOP (Adjustable)

PGOOD

SHDN

C+

OUT

MCP1252

MCP1253

GND

C-

 2002-2014 Microchip Technology Inc.

DS20001752C-page 1

12 3 4 5 6 7...20

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