LTC3230

4

3230fa

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: Based on long-term current density limitations. Assumes an

operating duty cycle of ≤10% under absolute maximum conditions

for durations less than 10 seconds. Maximum current for continuous

operation is 125mA.

Note 3: Based on long-term current density limitations. LD01 and LD02

have short circuit protection which limits current to no more than 750mA.

Assumes an operating short circuit duty cycle less than 3% for durations

less than 10 seconds.

Note 4: The LTC3230 is guaranteed to meet performance specifications

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

operating temperature range are assured by design, characterization and

correlation with statistical process controls.

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 result in device degradation or failure.

Note 7: If the part has been shut down then the initial enable time is about

100μs longer due to the bandgap start-up and charge pump soft-start

times.

Dropout Time from Enable

Dropout Time when Enabled

1.5x CPO Ripple

2x CPO Ripple

1x Mode Switch Resistance vs

Temperature

1.5x Mode Charge Pump Open-

Loop Output Resistance vs

CPO

2V/DIV

400

μs/DIV

ENS = LOW

3230 G01

ENM

2V/DIV

1x

2x

1.5x

CPO

2V/DIV

400

μs/DIV

ENS = HIGH

3230 G02

ENM

2V/DIV

1x

2x

1.5x

MODE RESET

20mV/DIV

AC COUPLED

400ns/DIV

C1 = C2 = C6 = 1

μF

3230 G03

20mV/DIV

AC COUPLED

400ns/DIV

C1 = C2 = C6 = 1

μF

3230 G04

TEMPERATURE (

°C)

–40

1.6

1.8

2.0

60

3230 G05

1.4

1.2

1.5

1.7

1.9

1.3

1.1

1.0

–15

10

35

85

TEMPERATURE (

°C)

–40

5

6

7

8

9

10

11

–15

10

35

60

3230 G06

85

C1 = C2 = C6 = 1

μF