LT3501EFE-TRPBF Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Fabricante

LT3501EFE-TRPBF

Monolithic Dual Tracking 3A Step-Down Switching Regulator

Linear Technology 

LT3501

Electrical Characteristics

Note 4: An internal power-on reset (POR) latch is set on the positive

transition of the SHDN pin through its threshold. The output of the latch

activates current sources on each SS pin which typically sink 1.5mA,

discharging the SS capacitor. The latch is reset when both SS pins are

driven below the soft-start POR threshold or the SHDN pin is taken below

its threshold.

Note 5: To enhance dropout operation, the output switch will be turned off

for the minimum off-time only when the voltage across the boost capacitor

drops below the minimum boost for 100% duty cycle threshold.

Note 6: The IND to VOUT maximum current is defined as the value of

current flowing from the IND pin to the VOUT pin which resets the switch

latch when the VC pin is at its high clamp.

Note 7: This is the minimum voltage across the boost capacitor needed to

guarantee full saturation of the internal power switch.

Note 8: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

Typical Performance Characteristics

Feedback Voltage vs Temperature

0.816

0.811

0.806

0.801

0.796

0.791

0.786

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3501 G02

Shutdown Quiescent Current

vs Temperature

16

14

VVIN1

12

10

8

6

4

2

0

–50 –25

VVIN2

0 25 50 75

TEMPERATURE (°C)

100 125

3501 G05

RT/SYNC Voltage vs Temperature

1.05

1.03

1.01

0.99

0.97

0.95

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3501 G03

Soft-Start Source Current

vs Temperature

4.0

3.8

3.6

3.4

3.2

3.0

2.8

2.6

2.4

2.2

2.0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3501 G06

Shutdown Threshold and Minimum

Input Voltage vs Temperature

3.0

2.5

MINIMUM INPUT

VOLTAGE

2.0

SHUTDOWN

THRESHOLD

1.5

VOLTAGE

1.0

0.5

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3501 G04

IND to VOUT Maximum Current

vs Temperature

5.0

4.8

4.6

4.4

4.2

VOUT = 5V

4.0

3.8

VOUT = 0V

3.6

3.4

3.2

3.0

–50 –25

0 25 50 75 100 125

TEMPERATURE (°C)

3501 G07

3501fd

4

Share Link: