TC1313 datasheet(11/28 Pages) MICROCHIP

Part #	TC1313

Description	500 mA Synchronous Buck Regulator, 300 mA LDO

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Manufacturer	MICROCHIP [Microchip Technology]

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DS21974A-page 11

TC1313

Note: Unless otherwise indicated, VIN1 = VIN2 = SHDN1,2 = 3.6V, COUT1 =CIN = 4.7 µF, COUT2 =1 µF, L =4.7 µH,

VOUT1 (ADJ) = 1.8V, TA =+25°C. Boldface specifications apply over the TA range of -40°C to +85°C. TA = +25°C. Adjustable or fixed-

output voltage options can be used to generate the Typical Performance Characteristics.

FIGURE 2-25:

VOUT2 Dropout Voltage vs.

Ambient Temperature (VOUT2 = 2.5V).

FIGURE 2-26:

VOUT2 Dropout Voltage vs.

Ambient Temperature (VOUT2 = 3.3V).

FIGURE 2-27:

VOUT2 Line Regulation vs.

Ambient Temperature.

FIGURE 2-28:

VOUT2 Load Regulation vs.

Ambient Temperature.

FIGURE 2-29:

VOUT2 Power Supply Ripple

Rejection vs. Frequency.

FIGURE 2-30:

VOUT2 Noise vs. Frequency.

0.05

0.10

0.15

0.20

0.25

0.30

Ambient Temperature (°C)

IOUT2 = 200 mA

IOUT2 = 300 mA

SHDN1 = AGND

SHDN2 = VIN2

0.0

0.1

0.2

0.3

-40 -25 -10

5

20 35 50 65

80 95 110 125

Ambient Temperature (°C)

IOUT2 = 200 mA

SHDN1 = AGND

SHDN2 = VIN2

IOUT2 = 300 mA

-0.035

-0.030

-0.025

-0.020

-0.015

-0.010

-0.005

0.000

0.005

-40 -25 -10

5

20

35

50

65

80

95 110 125

Ambient Temperature (°C)

VOUT2 = 3.3V

IOUT2 = 100 µA

SHDN1 = AGND

SHDN2 = VIN2

VOUT2 = 2.5V

VOUT2 = 1.5V

-0.4

-0.3

-0.2

-0.1

0.0

0.1

Ambient Temperature (°C)

VOUT2 = 3.3V

VIN2 = 3.6V

SHDN1 = AGND

SHDN2 = VIN2

VOUT2 = 2.6V

VOUT2 = 1.5V

-80

-70

-60

-50

-40

-30

-20

-10

0

0.01

0.1

1

10

100

1000

Frequency (kHz)

SHDN1 = GND

VOUT2 = 1.5V

IOUT2 = 30 mA

CIN = 0 µF

COUT2 = 1.0 µF

COUT2 = 4.7 µF

0.01

0.1

1

10

0.01

0.1

1

10

100

1000

10000

Frequency (kHz)

SHDN1 = AGND

SHDN2 = VIN2

VIN = 3.6V

VOUT2 = 2.5V

IOUT2 = 50 mA

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