LTC1553_15 datasheet(4/24 Pages) LINER

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LTC1553

TYPICAL PERFORMANCE CHARACTERISTICS

OUTPUT VOLTAGE (V)

2.775

100

140

1553 G01

120

2.795

2.825

2.785

2.805

2.815

TOTAL SAMPLE SIZE = 1500

°C

100

°C

Typical 2.8V VOUT Distribution

OUTPUT CURRENT (A)

2.825

1533 G03

2.820

2.815

2.810

2.805

2.800

2.795

2.790

2.785

2.780

2.775

1 2 3

5 6789 10 11 12 13 14

REFER TO TYPICAL APPLICATION

CIRCUIT FIGURE 1

VIN = 5V, PVCC = 12V, TA = 25°C

Load Regulation

LOAD CURRENT (A)

100

1533 G02

0.3

REFER TO TYPICAL APPLICATION

CIRCUIT FIGURE 1

VIN = 5V, PVCC = 12V, VOUT = 2.8V,

COUT = 330µF ×7, LO = 2µH

A: Q1 = 1

× SUD50N03-10

Q2 = 1

× SUD50N03-10

B: Q1 = 2

× SUD50N03-10

Q2 = 1

× SUD50N03-10

NO FAN

Q1 IS MOUNTED ON 1IN2 COPPER AREA

Over-Temperature Trip Point

vs Temperature

Efficiency vs Load Current

TEMPERATURE (

°C)

–50

1.96

2.08

2.10

2.12

1553 G06

1.92

2.04

2.00

1.94

2.06

1.90

2.02

1.98

–25

100

125

INPUT VOLTAGE (V)

4.75

2.825

2.820

2.815

2.810

2.805

2.800

2.795

2.790

2.785

2.780

2.775

5.15

1553 G04

4.85

4.95

5.05

5.25

REFER TO TYPICAL APPLICATION

CIRCUIT FIGURE 1

OUTPUT = NO LOAD

TA = 25°C

Line Regulation

Output Temperature Drift

TEMPERATURE (

°C)

–50

2.860

2.850

2.840

2.830

2.820

2.810

2.800

2.790

2.780

2.770

2.750

2.660

2.740

1553 G05

–25

100

125

Error Amplifier Open-Loop

DC Gain vs Temperature

Over-Temperature Driver Disable

vs Temperature

TEMPERATURE (

°C)

–50

1.60

1.62

1.66

1.68

1.70

1.80

1.74

1553 G07

1.64

1.76

1.78

1.72

–25

100

125

Error Amplifier Transconductance

vs Temperature

TEMPERATURE (

°C)

–50

1.7

1.9

2.3

1553 G08

1.5

1.3

–25

100

125

1.1

0.9

2.1

TEMPERATURE (

°C)

–50

–25

1553 G09

100

125

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