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 Bay Linear
Inspire the Linear Power
Dual 1.0Amp Low Dropout
Voltage Regulator
B2117
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 www..com 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
Pin Connection
Ordering Information
Devices
B2117S-X
X=output voltage
Package
TO-263
Temp.
0 C to 125 C
5 4 3 2 1
VADJ 2 VOUT 2 Input VOUT 1 . VADJ 1
TO-263-5 Package
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
Maximum Input Voltage Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering 10 Sec.)
Min
0 -65
Max
7.0 125 150 300
Unit
V C
Electrical Characteristics
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(VIN = 7V; TJ=25C IO = 10mA to 1.0Amp, unless otherwise specified) Parameter Symbol Conditions
Reference Voltage VO 1117-adj, IOUT=10mA, VIN-VOUT=2V, TJ=25C 1.5V(VIN-VOUT) 5.75V 10mAIOUTIFULL LOAD (VOUT+1.5)VIN7V, IOUT=10mA
MIN
1.238 1.225 -2%
TYP
1.250 1.250 0.005
MAX
1.262 1.275 +2% 0.5
UNIT
V V %
Line Regulation (1)
REG (line)
Load Regulation (1)
REG (LOAD)
Output Voltage
VO
(Vin-Vout)=2V 10mAIOUTIFULL LOAD T= 25 C 1117-1.8 IOUT=10mA, VIN=3.8V, TJ=25C 0IOUT1.0Amp, 3.2VVIN7V 1117-2.5 IOUT=10mA, VIN=4.5V, TJ=25C 0IOUT1.0Amp, 4.0VVIN7V 1117-3.3 IOUT=10mA, VIN=5.0V, TJ=25C 0IOUT1.0Amp, 4.8VVIN7V 1117-5.0 IOUT=10mA, VIN=6.0V, TJ=25C 0IOUT1.0Amp, 6.5VVIN7V Control Input VPOWER=VOUT+0.8, ILOAD =10mA VPOWER=VOUT+0.8, ILOAD =1.0Amp, (Vin-Vout)=2V 1.5V(VIN-VOUT) 5.75V T= 25 C, 30ms pulse T= 25 C, 1000Hrs T= 25 C F=120Hz, CADJ=22F, COUT=22F Tantalum IOUT=IFULL LOAD, (Vin-Vout)=3V (Note 5)
0.05
0.5
1.782 1.746 2.475 2.450 3.267 3.235 4.950 4.900
1.80 1.80 2.50 2.50 3.30 3.30 5.00 5.00 0.80 0.80 1.1
1.818 1.854 2.525 2.550 3.333 3.365 5.050 5.100 1.20 1.30
V V V V
Dropout Voltage
VD IS IMIN LOAD TA TS RA
V A mA %/W % % A dB C C
Current Limit Minimum Load Current Temperature Regulation Long Term Stability Temperature Stability Adjust pin Current Ripple Rejection Thermal Shutdown Thermal Shutdown Hysterics
1.0 10
60
0.004 0.03 0.5 35 75 155 10
0.02 1.0 120
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
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B2117
TYPICAL CHRACTRISTICS
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B2117-2.85
B2117-ADJ
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B2117
TYPICAL CHRACTRISTICS (Continued)
B2117-2.85
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B2117-5.0
B2117-2.85
B2117-5.0 Line Transient Response
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B2117
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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.
Bay Linear, Inc
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com


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