LT1767EMS8-5 datasheet(2/16 Pages) LINER

Part #	LT1767EMS8-5

Description	Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT1767/LT1767-1.8/

LT1767-2.5/LT1767-3.3/LT1767-5

sn1767 1767fas

ABSOLUTE MAXIMUM RATINGS

Input Voltage .......................................................... 25V

BOOST Pin Above SW ............................................ 20V

Max BOOST Pin Voltage .......................................... 35V

SHDN Pin ............................................................... 25V

FB Pin Voltage .......................................................... 6V

FB Pin Current ....................................................... 1mA

ELECTRICAL CHARACTERISTICS

(Note 1)

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS

Maximum Switch Current Limit

TA = 0°C to 125°C

1.5

2

3

A

TA = < 0°C

1.3

3

A

Oscillator Frequency

3.3V < VIN < 25V

1.1

1.25

1.4

MHz

q

1.1

1.5

MHz

Switch On Voltage Drop

ISW = –1.5A, 0°C ≤ TA ≤ 125°C and –1.3A, TA < 0°C

330

400

mV

q

500

mV

VIN Undervoltage Lockout

(Note 3)

q

2.47

2.6

2.73

V

VIN Supply Current

VFB = VNOM + 17%

q

1

1.3

mA

Shutdown Supply Current

VSHDN = 0V, VIN = 25V, VSW = 0V

6

20

µA

q

45

µA

Feedback Voltage

3V < VIN < 25V, 0.4V < VC < 0.9V

LT1767 (Adj)

1.182

1.2

1.218

V

(Note 3)

q

1.176

1.224

V

LT1767-1.8

q

1.764

1.8

1.836

V

LT1767-2.5

q

2.45

2.5

2.55

V

LT1767-3.3

q

3.234

3.3

3.366

V

LT1767-5

q

4.9

5

5.1

V

FB Input Current

LT1767 (Adj)

q

– 0.25

– 0.5

µA

The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.

VIN = 15V, VC = 0.8V, Boost = VIN + 5V, SHDN, SYNC and switch open unless otherwise noted.

SYNC Pin Current .................................................. 1mA

Operating Junction Temperature Range (Note 2)

LT1767E .......................................... – 40

°C to 125°C

Storage Temperature Range ................ – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300

°C

PACKAGE/ORDER INFORMATION

ORDER PART NUMBER

1

2

3

4

BOOST

VIN

SW

GND

8

7

6

5

SYNC

VC

FB

SHDN

TOP VIEW

MS8 PACKAGE

8-LEAD PLASTIC MSOP

TJMAX = 125°C, θJA = 110°C/W

LTLS

LTWG

LTWD

LTWE

LTWF

LT1767EMS8

LT1767EMS8-1.8

LT1767EMS8-2.5

LT1767EMS8-3.3

LT1767EMS8-5

GROUND PIN CONNECTED

TO LARGE COPPER AREA

MS8 PART MARKING

ORDER PART NUMBER

TJMAX = 125°C, θJA = 40°C/W

LT1767EMS8E

LT1767EMS8E-1.8

LT1767EMS8E-2.5

LT1767EMS8E-3.3

LT1767EMS8E-5

EXPOSED GND PAD

CONNECTED TO LARGE

COPPER AREA ON PCB

MS8E PART MARKING

LTZG

LTZH

LTZJ

LTZK

LTZL

1

2

3

4

BOOST

VIN

SW

GND

8

7

6

5

SYNC

VC

FB

SHDN

TOP VIEW

MS8E PACKAGE

8-LEAD PLASTIC MSOP

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

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