MCP1727-3302E/MF【PDF 1/32 页】IC REG LDO 3.3V 1.5A 8DFN

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MCP1727

1.5A, Low Voltage, Low Quiescent Current LDO Regulator

Features

Description

1.5A Output Current Capability

Input Operating Voltage Range: 2.3V to 6.0V

Adjustable Output Voltage Range: 0.8V to 5.0V

Standard Fixed Output Voltages:

- 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V

Other Fixed Output Voltage Options Available

Upon Request

Low Dropout Voltage: 330 mV Typical at 1.5A

Typical Output Voltage Tolerance: 0.5%

Stable with 1.0 μF Ceramic Output Capacitor

Fast response to Load Transients

Low Supply Current: 120 μA (typ)

Low Shutdown Supply Current: 0.1 μA (typ)

Adjustable Delay on Power Good Output

Short Circuit Current Limiting and

Overtemperature Protection

3x3 DFN-8 and SOIC-8 Package Options

The MCP1727 is a 1.5A Low Dropout (LDO) linear

regulator that provides high current and low output

voltages in a very small package. The MCP1727

comes in a fixed (or adjustable) output voltage version,

with an output voltage range of 0.8V to 5.0V. The 1.5A

output current capability, combined with the low output

voltage capability, make the MCP1727 a good choice

for new sub-1.8V output voltage LDO applications that

have high current demands.

The MCP1727 is stable using ceramic output

capacitors that inherently provide lower output noise

and reduce the size and cost of the entire regulator

solution. Only 1 μF of output capacitance is needed to

stabilize the LDO.

Using CMOS construction, the quiescent current

consumed by the MCP1727 is typically less than

120 μA over the entire input voltage range, making it

attractive for portable computing applications that

demand high output current. When shut down, the

Applications

quiescent current is reduced to less than 0.1 μA.

The scaled-down output voltage is internally monitored

High-Speed Driver Chipset Power

Networking Backplane Cards

Notebook Computers

Network Interface Cards

Palmtop Computers

2.5V to 1.XV Regulators

and a power good (PWRGD) output is provided when

the output is within 92% of regulation (typical). An

external capacitor can be used on the C DELAY pin to

adjust the delay from 200 μs to 300 ms.

The overtemperature and short circuit current-limiting

provide additional protection for the LDO during system

fault conditions.

Package Types

Adjustable (SOIC-8)

Fixed (SOIC-8)

Adjustable (3x3 DFN)

Fixed (3x3 DFN)

V IN 1

V IN 2

SHDN 3

GND 4

8 V OUT

7 ADJ

6 C DELAY

5 PWRGD

V IN 1

V IN 2

SHDN 3

GND 4

8 V OUT

7 Sense

6 C DELAY

5 PWRGD

V IN 1

V IN 2

SHDN 3

V OUT

ADJ

C DELAY

V IN 1

V IN 2

SHDN 3

V OUT

Sense

C DELAY

GND 4

PWRGD

GND 4

PWRGD

? 2007 Microchip Technology Inc.

DS21999B-page 1

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