LTM4615V Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LTM4615V

Triple Output, Low Voltage DC/DC µModule Regulator

Linear Technology 

TYPICAL PERFORMANCE CHARACTERISTICS

LTM4615

Ripple Rejection

70

60

50

40

30

20

10

0

100

1000

VBOOST3 = 5V

VLDO_IN = 1.5V

VLDO_OUT =1.2V

IOUT = 800mA

COUT = 10μF

10000 100000 1000000 1E+07

FREQUENCY (Hz)

4615 G19

Output Current Limit

5.0

4.5

VLDO_OUT = 0V

TA = 25°C

4.0

3.5

3.0

2.5

CURRENT LIMIT

2.0

1.5

THERMAL LIMIT

1.0

1.0

1.5

2.0

2.5

3.0 3.5

VLDO_IN (V)

4615 G20

Delay from Enable to Power Good

5.0

VLDO_OUT = 0.8V

4.5

RLDO_OUT = 8Ω

4.0

–40°C

25°C

3.5

85°C

3.0

2.5

2.0

1.5

1.0

0.5

0

1.0

1.5

2.0

2.5

3.0

3.5

VLDO_IN (V)

4615 G21

Output Load Transient Response

1.5A

ILDO_OUT

2mA

VLDO_OUT

AC

20mV/DIV

IN Supply Transient Response

2V

VLDO_IN

1.5V

VLDO_OUT

AC

10mV/DIV

VLDO_OUT = 1.5V 50μs/DIV

COUT = 10μF

VLDO_IN = 1.7V

VBOOST3 = 5V

BOOST3/OUT Start-Up

HI

EN3

LO

5V

BOOST3

1V

1.5V

VLDO_OUT

0V

TA = 25°C

RLDO_OUT = 1Ω

VLDO_IN = 1.7V

200μs/DIV

4615 G22

4615 G24

VLDO_OUT = 1.2V 10μs/DIV

ILDO_OUT = 800mA

COUT = 10μF

VBOOST3 = 5V

TA = 25°C

4615 G23

BOOST3 Ripple and Feedthrough to

VLDO_OUT

BOOST3

AC 20mV/DIV

VLDO_OUT

AC 5mV/DIV

VLDO_OUT = 1.2V

VLDO_IN = 1.5V

ILDO_OUT = 1A

COUT = 10μF

TA = 25°C

20μs/DIV

4615 G25

4615f

7

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