LTC3872 datasheet(2/20 Pages) LINER

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LTC3872

3872fa

Input Supply Voltage (VIN), RUN/SS .......... –0.3V to 10V

IPRG Voltage..................................–0.3V to (VIN + 0.3V)

VFB, ITH Voltages....................................... –0.3V to 2.4V

SW Voltage ................................................ –0.3V to 60V

(Note 1)

The

● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 4.2V unless otherwise noted. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

●

2.75

9.8

Input DC Supply Current

Normal Operation

Shutdown

UVLO

Typicals at VIN = 4.2V (Note 4)

2.75V ≤ VIN ≤ 9.8V, VITH = 1.3V

VRUN/SS = 0V

VIN < UVLO Threshold, VRUN = 0V

250

400

μA

Undervoltage Lockout Threshold

VIN Rising

VIN Falling

●

2.3

2.05

2.45

2.3

2.75

2.55

Shutdown Threshold (at RUN/SS)

VRUN/SS Falling

VRUN/SS Rising

●

0.6

0.7

0.85

0.95

1.05

1.15

Regulated Feedback Voltage

(Note 5)

●

1.182

1.2

1.218

Feedback Voltage Line Regulation

2.75V < VIN < 9V (Note 5)

0.14

mV/V

Feedback Voltage Load Regulation

VITH = 1.6V (Note 5)

VITH = 1V (Note 5)

0.05

–0.05

VFB Input Current

(Note 5)

RUN/SS Pull Up Current

VRUN/SS = 0

0.35

0.7

1.25

μA

ELECTRICAL CHARACTERISTICS

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

IPRG 1

ITH 2

VFB 3

GND 4

8 SW

7 RUN/SS

6 VIN

5 NGATE

TOP VIEW

TS8 PACKAGE

8-LEAD PLASTIC TSOT-23

TJMAX = 125°C, θJA = 230°C/W

TOP VIEW

DDB PACKAGE

8-LEAD (3mm

× 2mm) PLASTIC DFN

GND

VFB

ITH

IPRG

NGATE

VIN

RUN/SS

TJMAX = 125°C, θJA = 76°C/W

EXPOSED PAD (PIN 9) IS GND MUST BE SOLDERED TO PCB

ORDER PART NUMBER

TS8 PART MARKING

ORDER PART NUMBER

DDB PART MARKING

LTC3872ETS8

LCGB

LTC3872EDDB

LCHT

Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

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

Operating Temperature Range (Note 2) ... –40°C to 85°C

Junction Temperature (Note 3) ............................. 125°C

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

Lead Temperature (Soldering, 10 sec)

TS8 Package ......................................................... 300°C

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