LT1117CSTPBF Linear Technology Corporation, LT1117CSTPBF Datasheet

LT1117CSTPBF

Manufacturer Part Number

LT1117CSTPBF

Description

SOT223

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1117CSTPBF.pdf (16 pages)

2.LT1117CSTPBF.pdf (16 pages)

3.LT1117CSTPBF.pdf (12 pages)

Specifications of LT1117CSTPBF

Date_code

08+

Current page: 1 of 16
Download datasheet (190Kb)

FEATURES

APPLICATIONS

L, LT, LTC, LTM, Linear Technology, OPTI-LOOP and the Linear logo are registered trademarks

of Linear Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. All

other trademarks are the property of their respective owners.

TYPICAL APPLICATION

Space Saving SOT-223 Surface Mount Package

3-Terminal Adjustable or Fixed 2.85V, 3.3V, 5V

Output Current of 800mA

Operates Down to 1V Dropout

Guaranteed Dropout Voltage at Multiple Current Levels

0.2% Line Regulation Max

0.4% Load Regulation Max

Active SCSI Terminators

High Efﬁ ciency Linear Regulators

Post Regulators for Switching Supplies

Battery Chargers

5V to 3.3V Linear Regulators

4.75V TO

5.25V

Active Terminator for SCSI-2 Bus

10μF

LT1117-2.85

GND

OUT

22μF

110Ω

1117 TA01

18 TO 27

LINES

Positive Regulators Adjustable

DESCRIPTION

The LT

to provide up to 800mA of output current. The device is

available in an adjustable version and fixed output voltages

of 2.85V, 3.3V and 5V. The 2.85V version is designed

specifically to be used in Active Terminators for the SCSI

bus. All internal circuitry is designed to operate down to 1V

input to output differential. Dropout voltage is guaranteed

at a maximum of 1.2V at 800mA, decreasing at lower load

currents. On chip trimming adjusts the reference/output

voltage to within ± 1%. Current limit is also trimmed in

order to minimize the stress on both the regulator and the

power source circuitry under overload conditions.

The low proﬁ le surface mount SOT-223 package allows the

device to be used in applications where space is limited. The

LT1117 requires a minimum of 10μF of output capacitance

for stability. Output capacitors of this size or larger are

normally included in most regulator designs.

Unlike PNP type regulators where up to 10% of the output

current is wasted as quiescent current, the quiescent current

of the LT1117 ﬂ ows into the load, increasing efﬁ ciency.

and Fixed 2.85V, 3.3V, 5V

1117 is a positive low dropout regulator designed

1.4

1.2

1.0

0.8

0.6

0.4

0.2

800mA Low Dropout

Dropout Voltage (V

100

INDICATES GUARANTEED TEST POINT

LT1117-3.3/LT1117-5

200 300

OUTPUT CURRENT (mA)

LT1117/LT1117-2.85

= 25°C

= 125°C

–40°C ≤ T

0°C ≤ T

400

500

≤ 125°C

– V

< 0°C

600

OUT

700

1117 TA02

)

800

1117fd

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