BAYLI B1117N-ADJ, B1117N-3.3, B1117N-2.85, B1117N-2.5, B1117N-1.8 Datasheet

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

1.0Amp Low Dropout Voltage Regulator

B1117

Adjustable & Fix (0.40Volt Dropout)

Pin Connection

Ordering Information

Devices Package Temp.

B1117D-X TO-252

0 °C to 125 °C

B1117N-X TO-223

0 °C to 125 °C

B1117T-X TO-220

0 °C to 125 °C

B1117S-X TO-263

0 °C to 125 °C

B1117M-X SO-8

0 °C to 125 °C

2

1

3

4

8

7

6

5

8-Pin Surface Mount

Top View

ADJ

OUT

OUT

N.C.

IN

NC

2

1

3

4

8

7

6

5

8-Pin Surface Mount

Top View

IN

IN

2

1

3

4

8

7

6

5

8-Pin Surface Mount

Top View

ADJ

OUT

OUT

N.C.

IN

NC

2

1

3

4

8

7

6

5

8-Pin Surface Mount

Top View

IN

IN

Description

The Bay Linear B1117 is a three terminal positive NPN
regulator offered as adjustable or fix voltages of 1.5V,1.8V,

2.5V, 2.85V, 3.3V, and 5Volts. The output current has a
capability up to

1.0Amp,. This device has been optimized for

low voltage where transient response and minimum input
voltage are critical. The 2.85V version is designed specifically
to be used in active terminators for SCSI bus.

Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-Chip thermal limiting
provides protection against any combination of overload and
ambient temperatures that would create excessive junction
temperatures.

The B1117 is offered in a 3-pin SOT-223, and TO-252
(DPAK) packages compatible with other 3 terminal regulators.

5-pin version in TO-263 with lower dropout of 0.4 volt is
available.

Features

• Adjustable Output Down to 1.2V

• Output Current of 1.0Amp

• Low Dropout 1.0V for B1117

• Dropout of 0.40 V in for B1117A

• Adjustable & Fix 1.5V, 1.8V, 2.5V, 2.85V,

3.0V, 3.3V, 5.0V

• 0.05% Load Regulation

• Current & Thermal Limiting

• Lower Cost SOT-89 Package

• Available in SOT-223, and TO-252,

TO-263 & SO-8

• Similar to industry Standard LT1117

Applications

• Active SCSI terminators

• High efficiency Linear Regulator

• Post regulators fro Switching Supplies

• Battery Charger

• 5V to 3.3V linear Regulators

• Motherboard Clock Supplies

Front

TO-252

ADJ/GN

V

IN

V

OUT

1

2 3

IN

OUT Adj/GND

Tab V

OUT

Front View

SOT - 223

IN

OUT Adj/GND

Tab V

OUT

Front View

SOT - 223

V

POWER

OUTPUT

1

2

3

4

5

V

CONTROL

ADJ/GND.

SENSE

TO-263-5 Package

V

POWERVPOWER

OUTPUT

1

2

3

4

5

V

CONTROLVCONTROL

ADJ/GND.

SENSE

TO-263-5 Package

Bay Linear

Inspire the Linear Power

Tab V

OUT

SOT-223

Tab V

OUT

Front View

SOT-223 -5

4

1

5

23

#1 Sense
#2 Adj/GND
#3 OUT
#4 Control
#5 V

IN

Tab V

OUT

SOT-223

Tab V

OUT

Front View

SOT-223 -5

4

1

5

23

#1 Sense
#2 Adj/GND
#3 OUT
#4 Control
#5 V

IN

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

B1117

Absolute Maximum Rating

Parameter Min Max Unit

Maximum Input Voltage 7.0 V
Operating Junction Temperature Range 0 125
Storage Temperature Range -65 150
Lead Temperature (Soldering 10 Sec.) 300

°C

Electrical Characteristics

(VIN = 7V; TJ=25°C IO = 10mA to 1.0Amp, unless otherwise specified)

Parameter Symbol Conditions MIN TYP MAX UNIT

1.238 1.250 1.262 V

1.225 1.275

Reference Voltage VO 1117-adj, I

OUT

=10mA, VIN-V

OUT

=2V, TJ=25°C

1.5V≤(V

IN-VOUT

) ≤5.75V

10mA≤I

OUT≤IFULL LOAD

-2%

1.250

+2%

V

Line Regulation (1) REG

(line)

(V

OUT

+1.5)≤VIN≤7V, I

OUT

=10mA

0.005 0.2

Load Regulation (1) REG

(LOAD)

(Vin-V

out

)=2V

10mA≤I

OUT≤IFULL LOAD

T= 25 °C

0.05 0.5

%

1117-1.8 I

OUT

=10mA, VIN=3.8V, TJ=25°C

0≤I

OUT

≤1.0Amp, 3.2V≤VIN≤7V

1.782

1.746

1.80

1.80

1.818

1.854

V

1117-2.5 I

OUT

=10mA, VIN=4.5V, TJ=25°C

0≤I

OUT

≤1.0Amp, 4.0V≤VIN≤7V

2.475

2.450

2.50

2.50

2.525

2.550

V

1117-2.85 I

OUT

=10mA, VIN=4.85V, TJ=25°C

0≤I

OUT

≤1.0Amp, 4.35V≤VIN≤7V

2.820

2.790

2.85

2.85

2.880

2.910

V

1117-3.3 I

OUT

=10mA, VIN=5.0V, TJ=25°C

0≤I

OUT

≤1.0Amp, 4.8V≤VIN≤7V

3.267

3.235

3.30

3.30

3.333

3.365

V

Output Voltage VO

1117-5.0 I

OUT

=10mA, VIN=6.0V, TJ=25°C

0≤I

OUT

≤1.0Amp, 6.5V≤VIN≤7V

4.950

4.900

5.00

5.00

5.050

5.100

V

Dropout Voltage V

D

Control Input
V

POWER=VOUT

+0.8, I

LOAD

=10mA

V

POWER=VOUT

+0.8, I

LOAD

=1.0Amp,

0.80

0.80

1.00

1.10

V

Dropout Voltage VD Power Input

V

CONTROL=VOUT

-+2.5V, I

LOAD

=1.0Amp,

0.35 0.40 V

Current Limit I

S

(Vin-V

out

)=2V

1.0 1.1 A

Minimum Load Current I

MIN LOAD

1.5V≤(VIN-V

OUT

) ≤5.75V

10 mA

Temperature Regulation T

A

T= 25 °C, 30ms pulse

0.004 0.02 %/W

Long Term Stability -

T= 25 °C, 1000Hrs

0.03 1.0 %

Temperature Stability T

S

0.5 %

Adjust pin Current -

T= 25 °C

35 120

µA

Ripple Rejection R

A

F=120Hz, C

ADJ

=22µF, C

OUT

=22µF Tantalum

I

OUT=IFULL LOAD

, (Vin-V

out

)=3V (Note 5)

60 75 dB

Thermal Shutdown 155

°C
Thermal Shutdown
Hysterics

10

°C

Thermal Resistance
Junction to case

-
SOT-223
DD Package

15

3.0

15

3.0

°C/W

Note: Output Switch tests are performed under pulsed conditions to minimize power dissipation

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94550 Tel: [phone], Fax: [phone] www.baylinear.com

B1117

TYPICAL CHRACTRISTICS

B1117-2.85

B1117-ADJ