LTC3459

3

3459fc

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 LTC3459E 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.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

l

1.5

5.5

V

10

20

μA

SHDN = GND

0.1

1

μA

Programmable Voltage Range

l

2.5

10

V

24

μA

SHDN = GND

0.1

1

μA

Reference

Feedback Voltage

l

1.19

1.22

1.25

V

FB Input Leakage Current

Measured on FB

10

50

nA

Converter Performance

L = 22μH

l

60

75

90

mA

225

400

550

ns

Zero Current Comparator Threshold

L = 22μH

0

mA

Main NMOS Switch

On-Resistance

2.8

Ω

Leakage Current

0.01

1

μA

Main PMOS Switch

On-Resistance

4.2

Ω

Leakage Current

0.02

2

μA

Logic Inputs

SHDN Threshold (Rising Edge)

0.3

1

V

SHDN Hysteresis

80

mV

SHDN Input Leakage Current

SHDN = 3.3V

0

50

nA

The

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.