LTC3530

3

3530fb

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 LTC3530E 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 correlations

with statistical process controls.

Note 3: Current measurements are performed when the outputs are not

switching.

Note 4: 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 result in device degradation or failure.

The

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

NMOS Switch Leakage

Switches B and C

0.1

5

μA

PMOS Switch Leakage

Switches A and D

0.1

10

μA

NMOS Switch On Resistance

Switches B and C

0.21

Ω

PMOS Switch On Resistance

Switches A and D

0.24

Ω

Maximum Duty Cycle

Boost (% Switch C On)

Buck (% Switch A On)

l

l

80

100

90

%

%

Minimum Duty Cycle

l

0%

Frequency

l

0.7

1

1.3

MHz

Error Amp AVOL

90

dB

Error Amp Source Current

300

μA

Error Amp Sink Current

300

μA

Burst Threshold

1V

Burst Input Current

2

μA

SHDN/SS Threshold

When IC is Enabled

When EA is at Maximum Boost Duty Cycle

l

0.4

0.85

1.6

1.4

V

V

SHDN/SS Input Current

0.01

1

μA

2.5

4.0

5.0

3530 G01

3.0

3.5

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

5.5

2.0 MHz

1.5 MHz

1.0 MHz

0.5 MHz

NO SWITCHING

2.5

3.0

3.5

4.0

4.5

3530 G02

5.0

50

45

40

35

30

25

20

15

10

5

0

5.5

2.5

2.0

2.5

3.0

4.0

5.0

3530 G03

1.5

1.0

3.0

3.5

4.5

5.5

0.5

0.0

3.5

(Fixed Frequency Mode)

Burst Mode Quiescent Current

ELECTRICAL CHARACTERISTICS

TYPICAL PERFORMANCE CHARACTERISTICS