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LT3587

3587fc

ABSOLUTE MAXIMUM RATINGS

VIN ..............................................................................6V

Soft-Start Input Pins

EN/SS1, EN/SS3 .....................................................6V

Feedback Pins

FB1, FB2, IFB3, VFB3 ................................. –0.2V to 6V

High Voltage Switch Pins

SW1, SW2, SW3...................................................40V

High Voltage Output Pins

CAP1, CAP3, VOUT1, VOUT3 ...................................32V

Bidirectional I/O Pin

FLT ..........................................................................6V

FLT Current ........................................................10mA

Operating Junction Temperature Range.. –40°C to 125°C

Storage Temperature Range................... –65°C to 125°C

(Note 1)

20 19 18 17 16

TOP VIEW

UD PACKAGE

20-LEAD (3mm

3mm) PLASTIC QFN

9 10

VOUT3

CAP3

SW3

GND

FLT

FB1

VOUT1

CAP1

GND

SW1

θJA = 68°C/W, θJC = 4.2°C/W

EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Input Voltage Range

2.5

Quiescent Current

VEN/SS1 = 0V, VEN/SS3 = VVIN OR

VEN/SS1 = VVIN, VEN/SS3 = 0V OR

VEN/SS1 = VEN/SS3 = VVIN

Not Switching

2.4

VEN/SS1 = VEN/SS3 = 0V, In Shutdown

5.5

μA

Switching Frequency

0.8

1.2

MHz

Maximum Duty Cycle

Minimum On Time

Power Fault Delay from Any Output to FLT

FLT Input Threshold Low

0.4

1.0

1.6

FLT Leakage Current

VFLT = 5V

±1

μA

FLT Voltage Output Low

IFLT = 1mA

0.4

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3587EUD#PBF

LT3587EUD#TRPBF

LDNC

20-Lead (3mm

× 3mm) Plastic QFN

–40°C to 125°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

Consult LTC Marketing for information on non-standard lead based ﬁnish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/

PIN CONFIGURATION

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VVIN = 3.6V, VEN/SS1 = VEN/SS3 = VVIN unless otherwise noted (Note 2, 3).

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