LT3572

3

3572fa

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 LT3572 is guaranteed to meet specified performance from

0°C to 70°C operating junction temperature. Specifications over the

–40°C to 85°C operating junction temperature range are assured by

design, characterization and correlation with statistical process controls.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PWMA Pin Threshold

0.3

1.5

V

PWMB Pin Threshold

0.3

1.5

V

PGOOD Rising Threshold

(Note 3)

●

1.12

1.16

1.19

V

PGOOD Falling Threshold

(Note 4)

●

1.01

1.04

1.065

V

PGOOD Resistance

●

13

k

Ω

Switching Frequency

RT = 75.0k

Ω

RT = 13.0k

Ω

●

●

425

1.9

500

2.25

575

2.6

kHz

MHz

Maximum Duty Cycle

RT = 75.0k

Ω

RT = 13.0k

Ω

●

●

95

85

%

%

Synchronization Frequency

575

2500

kHz

SYNC Pin Thresholds

(Note 5)

0.3

1.5

V

SS Current

4.5

μA

FB Pin Voltage

●

1.195

1.225

1.255

V

FB Pin Voltage Line Regulation

0.01

0.05

%/V

FB Pin Bias Current

50

200

nA

SW Current Limit

(Note 7)

0.9

1.3

1.7

A

310

450

mV

SW Leakage Current

SW = 40V

0.2

5

μA

OUTx Rise Time

120

ns

OUTx Fall Time

120

ns

Note 3: Rising threshold voltage on FB pin that pulls PGOOD low.

Note 4: Falling threshold voltage on FB pin that causes a high impedance

on PGOOD.

Note 5: Minimum pulse width is 100ns. Maximum off pulse width is 100ns.

Note 6: Current flows into the pin.

Note 7: Current limit guaranteed by design and/or correlation to static test.

Note 8: OUTx refers to OUTA, OUTA, OUTB, OUTB.