LTC3371 datasheet(4/24 Pages) AD

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LTC3315A

Rev. A

For more information www.analog.com

TYPICAL PERFORMANCE CHARACTERISTICS T

A = 25°C, VIN = 3.3V, unless otherwise noted.

VFB vs Temperature

PMOS RDS(ON) vs Temperature

NMOS RDS(ON) vs Temperature

NMOS, PMOS Leakage vs

Temperature

Oscillator Frequency vs

Temperature

Oscillator Frequency vs VIN

characterization, and correlation with statistical process controls. The

LTC3315AI is guaranteed over the –40°C to 125°C operating junction

temperature range, the LTC3315AJ and the LTC3315AH are guaranteed

over the –40°C to 150°C operating junction temperature range, and the

LTC3315AMP is guaranteed over the –55°C to 150°C operating junction

temperature range. High junction temperatures degrade operating

lifetimes; operating lifetime is derated for junction temperatures greater

than 125°C. Note that the maximum ambient temperature consistent

with these specifications is determined by specific operating conditions

in conjunction with board layout, the rated package thermal impedance,

and other environmental factors. The junction temperature (TJ in °C) is

calculated from ambient temperature (TA in °C) and power dissipation (PD

in Watts) according to the formula:

TJ = TA + (PD • θJA)

where θJA (in °C/W) is the package thermal impedance. See High

Temperature Considerations section for more details.

Note 3: The LTC3315A includes overtemperature protection which

protects the device during momentary overload conditions. Junction

temperatures will exceed 150°C when overtemperature protection is

active. Continuous operation above the specified maximum operating

junction temperature may impair device reliability.

Note 4: Static current, switches not switching. Actual current will be

higher due to gate charge losses at the switching frequency.

Note 5: Overtemperature shutdown is not tested in production.

Note 6: The soft-start time is the time from the start of switching until the

FB pin reaches 475mV.

ELECTRICAL CHARACTERISTICS

TEMPERATURE (°C)

–50 –25

75 100 125 150

490

492

494

496

498

500

502

504

506

508

510

3315 G01

VIN = 2.25V

VIN = 3.3V

VIN = 5.5V

TEMPERATURE (°C)

–50 –25

75 100 125 150

100

125

150

3315ab G02

VIN = 2.25V

VIN = 3.3V

VIN = 5.5V

TEMPERATURE (°C)

–50 –25

75 100 125 150

3315ab G03

NMOS, VIN = 5.5V, SW = 5.5V

NMOS, VIN = 3.3V, SW = 3.3V

PMOS, VIN = 5.5V, SW = 0V

PMOS, VIN = 3.3V, SW = 0V

TEMPERATURE (°C)

–50 –25

75 100 125 150

0.4

0.8

1.2

1.6

2.0

2.4

2.8

3.2

3315ab G04

VIN = 5.5V

VIN = 3.3V

VIN = 2.25V

TEMPERATURE (°C)

–50 –25

75 100 125 150

1.80

1.84

1.88

1.92

1.96

2.00

2.04

2.08

2.12

2.16

2.20

3315aba G05

VIN (V)

2.5

3.5

4.5

5.5

1.80

1.84

1.88

1.92

1.96

2.00

2.04

2.08

2.12

2.16

2.20

3315ab G06

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