LTC3672B-1

3

3672B1f

ELECTRICAL CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC3672B-1 is guaranteed to meet performance specifications

from 0°C to 85°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3: 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.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

BUCKOUT Pulldown Resistance in Shutdown

10

k

Ω

SW Pulldown Resistance in Shutdown

10

k

Ω

Soft-Start Time

0.2

ms

Regulated Output Voltage

●

1.17

1.2

1.23

V

Line Regulation

0.05

1

mV/V

mV/V

Load Regulation

–0.05

mV/mA

Available Output Current

150

mA

Short-Circuit Output Current

347

mA

Dropout Voltage (Note 6)

484

570

mV

Soft-Start Time

0.3

ms

Output Pulldown Resistance in Shutdown

10

k

Ω

LDO Regulator 2

Regulated Output Voltage

●

2.73

2.8

2.87

V

1

mV/V

Load Regulation

0.1

mV/mA

Available Output Current

150

mA

Short-Circuit Output Current

453

mA

Dropout Voltage (Note 6)

188

250

mV

Soft-Start Time

0.1

ms

Output Pulldown Resistance in Shutdown

10

k

Ω

Note 4: Dynamic supply current is higher due to the gate charge delivered

to the buck regulator’s internal MOSFET switches at the switching

frequency.

Note 5: The current limit features of this part are intended to protect the

IC from short term or intermittent fault conditions. Continuous operation

above the specified maximum specified pin current rating may result in

device degradation or failure.

Note 6: Dropout voltage is the minimum input to output voltage differential

needed to maintain regulation at a specified output current. When LDO1 is