MCP1725 查看數據表（PDF） - Microchip Technology

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MCP1725

500 mA, Low Voltage, Low Quiescent Current LDO Regulator

Microchip Technology 

MCP1725

Note: Unless otherwise indicated, VIN = VOUT + 0.5V or VIN = 2.3V (whichever is greater), IOUT = 1 mA,

CIN = COUT = 4.7 µF Ceramic (X7R), SHDN = VIN, CDELAY = Open, Fixed Output Version, and TA = +25°C.

0

-10

-20

-30

-40

-50

-60

-70

-80

0.01

VR=2.5V Fixed

COUT=4.7 μF ceramic X7R

VIN=3.3V

CIN=0 μF

IOUT=10 mA

0.1

1

10

100

Frequency (KHz)

1000

FIGURE 2-25:

Power Supply Ripple

Rejection (PSRR) vs. Frequency (VOUT = 2.5V

Fixed).

FIGURE 2-28:

Shutdown.

2.5V (Adj.) Startup from

0

-10

-20

-30

-40

-50

-60

-70

-80

0.01

VR=2.5V Fixed

COUT=22 μF ceramic X7R

VIN=3.3V

CIN=0 μF

IOUT=10 mA

0.1

1

10

100

Frequency (KHz)

1000

FIGURE 2-26:

Power Supply Ripple

Rejection (PSRR) vs. Frequency (VOUT = 2.5V

Fixed).

FIGURE 2-29:

Power Good (PWRGD)

Timing with Cdelay of 1000 pF (2.5V Fixed).

FIGURE 2-27:

2.5V (Adj.) Startup from VIN.

FIGURE 2-30:

Power Good (PWRGD)

Timing with CDELAY of 0.01 µF (2.5V Fixed).

DS22026B-page 12

© 2007 Microchip Technology Inc.

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