MCP1602 datasheet(1/26 Pages) MICROCHIP

部件名	MCP1602

功能描述	2.0 MHz, 500 mA Synchronous Buck Regulator with Power-Good

PDF	26 Pages

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制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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1 / 26 page

DS22061A-page 1

MCP1602

Features

• Over 90% Typical Efficiency

• Output Current: Up To 500 mA

• Power-Good Output with 262 ms Delay

• Low Quiescent Current: 45 µA (typical)

• Low Shutdown Current: 0.05 µA (typical)

• Automatic PWM to PFM Mode Transition

• Adjustable Output Voltage:

- 0.8V to 4.5V

• Fixed Output Voltage:

- 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V

• 2.0 MHz Fixed-Frequency PWM (Heavy Load)

• Internally Compensated

• Undervoltage Lockout (UVLO)

• Overtemperture Protection

• Overcurrent Protection

• Space Saving Packages:

- 8-Lead MSOP

- 8-Lead 3x3 DFN

Applications

• Cellular Telephones

• Portable Computers

• Organizers / PDAs

• USB Powered Devices

• Digital Cameras

• Portable Equipment

• +5V or +3.3V Distributed Systems

General Description

The MCP1602 is a high efficient, fully integrated

500 mA synchronous buck regulator with a power-

good monitor. The 2.7V to 5.5V input voltage range and

low quiescent current (45 µA, typical) makes the

MCP1602 ideally suited for applications powered from

1-cell Li-Ion or 2-cell/3-cell NiMH/NiCd batteries.

At heavy loads, the MCP1602 operates in the 2.0 MHz

fixed frequency PWM mode which provides a low

noise, low output ripple, small-size solution. When the

load

is reduced

to light levels, the MCP1602

automatically changes operation to a PFM mode to

minimize quiescent current draw from the battery. No

intervention is necessary for a smooth transition from

one mode to another. These two modes of operation

allow the MCP1602 to achieve the highest efficiency

over the entire operating current range.

The open-drain power-good feature of the MCP1602

monitors the output voltage and provides indication

when the output voltage is within 94% (typical) of the

regulation value. The typical 2% hystereses in the

power-good

transition

threshold

as

well

as

a

262 ms (typical) delay time ensures accurate power-

good signaling.

The MCP1602 is available in either the 8-pin DFN or

MSOP package. It is also available with either an

adjustable or fixed output voltage. The available fixed

output voltage options are 1.2V, 1.5V, 1.8V, 2.5V, and

3.3V.

Additional

protection

features

include:

UVLO,

overtemperature, and overcurrent protection.

Package Types

VIN

8

7

6

5

4

3

2

1

SHDN

VCC

PG

AGND VOUT/VFB

LX

PGND

8

7

6

5

4

3

2

1

SHDN

VCC

PG

AGND

VOUT/VFB

LX

PGND

3x3 DFN-8

MSOP-8

2.0 MHz, 500 mA Synchronous Buck Regulator

with Power-Good

类似零件编号 - MCP1602

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类似说明 - MCP1602

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