MCP1252T-ADJISLASHMS datasheet(1/20 Pages) MICROCHIP

tên linh kiện	MCP1252T-ADJI/MS

Giải thích chi tiết về linh kiện	Low-Noise, Positive-Regulated Charge Pump

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 2002-2014 Microchip Technology Inc.

DS20001752C-page 1

MCP1252/3

Features:

• Inductorless, Buck/Boost, DC/DC Converter

• Low Power: 80 µA (Typical)

• High Output Voltage Accuracy:

- ±2.5% (VOUT Fixed)

• 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:

- MCP1252: 650 kHz

- MCP1253: 1 MHz

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

• Shutdown Input Compatible with 1.8V Logic

•VIN 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

• AEC-Q100 Qualified

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

VOUT

VIN

GND

SELECT

SHDN

C+

C-

1

2

3

4

8

7

6

5

PGOOD

VOUT

VIN

GND

FB

SHDN

C+

C-

1

2

3

4

8

7

6

5

MCP1252

MCP1253

MCP1252

MCP1253

Low-Noise, Positive-Regulated Charge Pump

Số phần tương tự - MCP1252T-ADJI/MS

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Microchip Technology	MCP1252T-ADJI/MS	440Kb / 18P	Low Noise, Positive-Regulated Charge Pump 2002

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