LT1175IT-5 datasheet(2/12 Pages) LINER

Part #	LT1175IT-5

Description	500mA Negative Low Dropout Micropower Regulator

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Manufacturer	LINER [Linear Technology]

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LT1175

ABSOLUTE MAXIMUM RATINGS

SHDN Pin to VIN Pin Voltage .......................... 30V, –5V

Operating Junction Temperature Range

LT1175C .............................................. 0

°C to 125°C

LT1175I .......................................... – 40

°C to 125°C

Ambient Operating Temperature Range

LT1175C ................................................ 0

°C to 70°C

LT1175I ............................................ – 40

°C to 85°C

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

°C to 150°C

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

°C

PACKAGE/ORDER INFORMATION

Input Voltage (Transient 1 sec, Note 11) ................ 25V

Input Voltage (Continuous) .................................... 20V

Input-to-Output Differential Voltage (Note 12) ........ 20V

5V SENSE Pin (with Respect to GND Pin) ...... 2V, – 10V

ADJ SENSE Pin

(with Respect to OUTPUT Pin) ................ 20V, – 0.5V

5V SENSE Pin

(with Respect to OUTPUT Pin) .................. 20V, – 7V

Output Reverse Voltage ............................................ 2V

SHDN Pin to GND Pin Voltage (Note 2) ..... 13.5V, – 20V

ELECTRICAL CHARACTERISTICS

ORDER

PART NUMBER

1

2

3

FRONT VIEW

TAB IS

INPUT

GND

VIN

OUTPUT

ST PACKAGE

3-LEAD PLASTIC SOT-223

ORDER

PART NUMBER

SHDN

GND

INPUT

SENSE

OUTPUT

Q PACKAGE

5-LEAD PLASTIC DD

FRONT VIEW

TAB

IS

INPUT

5

4

3

2

1

LT1175CN8

LT1175CN8-5

LT1175IN8

LT1175IN8-5

ORDER

PART NUMBER

ORDER

PART NUMBER

ORDER

PART NUMBER

θJA = 50°C/W WITH BACKPLANE

AND 10cm2 TOPSIDE LAND

SOLDERED TO TAB

θJA = 27°C/ W TO 60°C/W DEPENDING

ON PC MOUNTING. SEE DATA SHEET

FOR DETAILS

LT1175CT

LT1175CT-5

LT1175IT

LT1175IT-5

LT1175CST-5

LT1175IST-5

LT1175CQ

LT1175CQ-5

LT1175IQ

LT1175IQ-5

θJA = 60°C/ W TO 100°C/W DEPENDING

ON PC BOARD LAYOUT

T PACKAGE

5-LEAD PLASTIC TO-220

FRONT VIEW

5

4

3

2

1

SHDN

GND

INPUT

SENSE

OUTPUT

TAB IS

INPUT

θJA = 50°C/ W, θJC = 5°C/ W

Consult factory for Military grade parts.

PINS 1, 8 ARE INTERNALLY

CONNECTED TO DIE

ATTACH PADDLE FOR HEAT

SINKING. ELECTRICAL

CONTACT CAN BE MADE TO

EITHER PIN. FOR BEST

THERMAL RESISTANCE,

PINS 1, 8 SHOULD BE

CONNECTED TO AN

EXPANDED LAND THAT IS

OVER AN INTERNAL OR

BACKSIDE PLANE.

SEE APPLICATIONS

INFORMATION

1

2

3

4

8

7

6

5

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SO

VIN

ILIM2

OUTPUT

SENSE

VIN

ILIM4

SHDN

GND

LT1175CS8

LT1175CS8-5

LT1175IS8

LT1175IS8-5

S8 PART MARKING

1175I

1175I5

1175

11755

θJA = 80°C/W TO 120°C/W DEPENDING

ON PC BOARD LAYOUT

1

2

3

4

8

7

6

5

TOP VIEW

VIN

ILIM2

OUTPUT

SENSE

VIN

ILIM4

SHDN

GND

N8 PACKAGE

8-LEAD PDIP

(Note 1)

The q denotes specifications which apply over the operating temperature

range, otherwise specifications are at TA = 25°C. VOUT = 5V, VIN = 7V, IOUT = 0, VSHDN = 3V, ILIM2 and ILIM4 tied to VIN, TJ = 25°C,

unless otherwise noted. To avoid confusion with “min” and “max” as applied to negative voltages, all voltages are shown as

absolute values except where polarity is not obvious.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Feedback Sense Voltage

Adjustable Part

3.743

3.8

3.857

V

Fixed 5V Part

4.93

5.0

5.075

V

Output Voltage Initial Accuracy

Adjustable, Measured at 3.8V Sense

0.5

1.5

%

Fixed 5V

0.5

1.5

%

Output Voltage Accuracy (All Conditions)

VIN – VOUT = 1V to VIN = 20V, IOUT = 0A to 500mA

q

1.5

2.5

%

P = 0 to PMAX, TJ = TMIN to TMAX (Note 3)

Quiescent Input Supply Current

VIN – VOUT ≤ 12V

45

65

µA

q

80

µA

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