Page 1
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
Dual 1.0Amp Low Dropout
B2117
Voltage Regulator
Pin Connection
Ordering Information
Devices Package Temp.
B2117S-X TO-263
0 °C to 125 °C
X=output voltage
Description
The Bay Linear B2117 is a five terminal Dual positive NPN
regulator offered as adjustable or fix voltages of 1.8V, 2.5V,
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.
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 B2117 is offered in a 5-pin SOT-263,
Features
• Adjustable Output Down to 1.2V
• Output Current of 1.0Amp
• Low Dropout 1.0V for B2117
• Adjustable & Fix 1.8V, 2.5V, 3.3V
• 0.05% Load Regulation
• Current & Thermal Limiting
• Lower Cost SOT-89 Package
• Available in TO-263
Applications
• High efficiency Linear Regulator
• Post regulators fro Switching Supplies
• Battery Charger
• 5V to 3.3V linear Regulators
• Motherboard Clock Supplies
Bay Linear
Inspire the Linear Power
V
Input
1
2
3
4
5
V
OUT 2
TO-263-5 Package
VV
ADJ 2
1
2
3
4
5
VV
.
TO-263-5 Package
V
OUT 1
V
ADJ 1
VV
Input
1
2
3
4
5
V
OUT 2VOUT 2
TO-263-5 Package
VV
ADJ 2
1
2
3
4
5
VV
.
TO-263-5 Package
VV
.
TO-263-5 Package
V
OUT 1VOUT 1
V
ADJ 1
Page 2
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B2117
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 0.5
Load Regulation (1) REG
(LOAD) (Vin-Vout
)=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
1117-3.3 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
1.20
1.30
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
-
DD Package
3.0
3.0
°C/W
Note: Output Switch tests are performed under pulsed conditions to minimize power dissipation
Page 3
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B2117
TYPICAL CHRACTRISTICS
B2117-2.85
B2117-ADJ
Page 4
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B2117
TYPICAL CHRACTRISTICS (Continued)
B2117-5.0 Line Transient Response
B2117-2.85
B2117-2.85
B2117-5.0
Page 5
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B2117
Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,
computer simulations and/ or initial prototype evaluation.
Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are
subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.
The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit
design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any
industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different
applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.
LIFE SUPPORT AND NUCLEAR POLICY
Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical
implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without
the specific written consent of Bay Linear President.
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