3

LTC3452

3452f

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

(Note 6)

PWM Duty Cycle = 6%

1.8

2

2.16

mA/mA

●

1.75

2

2.21

mA/mA

PWM Duty Cycle = 19%

3.66

4

4.28

mA/mA

●

3.56

4

4.38

mA/mA

PWM Duty Cycle = 31%

7.32

8

8.56

mA/mA

●

7.12

8

8.76

mA/mA

PWM Duty Cycle = 44%

14.72

16

17.04

mA/mA

●

14.32

16

17.44

mA/mA

PWM Duty Cycle = 56%

29.44

32

33.92

mA/mA

●

28.64

32

34.56

mA/mA

PWM Duty Cycle = 69%

58.88

64

67.2

mA/mA

●

57.92

64

68.16

mA/mA

PWM Duty Cycle = 81%

117.12

128

134.4

mA/mA

128

137.6

mA/mA

PWM Duty Cycle = 94%

234.24

256

268.8

mA/mA

245

272.64

mA/mA

2.5

8

%

130

mV

●

4.35

4.5

4.75

V

Switches A and D at 100mA

210

m

Ω

Switches B and C at 100mA

205

m

Ω

Forward Current Limit

Switch A

1000

1600

2400

mA

Reverse Current Limit

Switch D

200

mA

PMOS Switch Leakage

Switches A and D

–1

1

µA

NMOS Switch Leakage

Switches B and C

–1

1

µA

Oscillator Frequency

0.9

1

1.1

MHz

Soft-Start Time

650

µs

The

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 LTC3452E is guaranteed to meet specifications from 0

°C to

70

°C. Specifications over the –40°C to 85°C operating temperature range

are assured by design, characterization and correlation with statistical

process controls.

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

delivered at the switching frequency.

Note 5: Do not exceed 50kHz PWM frequency in the application.

Note 6: This parameter is tested in a setup which forces conditions

equivalent to those programmed by the indicated duty cycle.