LTC3522

3

3522f

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 LTC3522 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: Current measurements are performed when the LTC3522 is not

switching. The current limit values in operation will be somewhat higher

due to the propagation delay of the comparators.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PGOOD Threshold

–11.3

–7.7

–4.1

%

Power Good Hysteresis

2.5

%

Buck-Boost Converter

Output Voltage

●

2.2

5.25

V

PMOS Switch Resistance

0.29

Ω

NMOS Switch Resistance

0.22

Ω

NMOS Switch Leakage

0.1

5

μA

PMOS Switch Leakage

0.1

10

μA

Feedback Voltage

(Note 4)

●

0.97

1

1.03

V

Feedback Input Current

150

nA

Average Current Limit

(Note 3)

0.65

0.85

A

Burst Mode Current Limit

230

340

mA

Reverse Current Limit

(Note 3)

250

mA

Maximum Duty Cycle

●

70

80

%

Minimum Duty Cycle

●

0%

PGOOD Threshold

–12

–10

–8

%

Power Good Hysteresis

2.5

%

Note 4: The LTC3522 is tested in a proprietary non-switching test mode

that connects each FB pin to the output of the respective error amplifier.

Note 5: 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.