Bay Linear
Inspire the Linear Power
250mA Low Dropout Voltage Regulators |
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B4252 |
ON/OFF & BYPASS |
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Description
The B4252 series are a group of positive output voltage, five-pin regulators, which provide a high current even when the input/output voltage differential is small. Low power consumption and high accuracy is achieved though CMOS and programmable fuse technologies. Output voltage: 2.0V to 6.0V in 0.1V increments.
The B4252 consists of a high-precision voltage reference, an error correction circuit, and a current limited output driver. Key features include a Shutdown Pin that reduces supply current to 0.5µA max and a 470pF Bypass input to ground reduces noise present on the internal reference, which in turn significantly reduce output noise. If output noise is not concern, this input maybe left unconnected. Larger capacitor values cap be used, but results in longer time period to rated output voltage when power initially applied.
The ON/OFF pin enables the output to be turned off, resulting in reduced power consumption. Provided in SOT-25 (150mW) packages minimizes the usage of board real state.
Features
•Maximum Output Current: 250 mA.
•Highly Accurate Output Voltage +/- 1.4%
•Only 19µA Power Consumption MAX
•Shutdown Supply Current 1µA
•Ground Current of Less than 5µA
•Very Low Dropout
0.12V at 100mA
0.23V at 250mA
•Shutdown Mode for Power Savings
•With ON/OFF & BYPASS Features
•Offered in SOT-25 Packages
•PIN-to-PIN RICOH R1121N-E
Applications
•Battery Powered Equipment
•Notebook PC, Palmtops, PDA
•Portable Cameras and Video Recorders
•Reference Voltage Sources
•Cellular / GSM / PCS Phones
Pin Connection |
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Ordering Information |
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Package |
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Part No. |
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SOT-25 |
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B4252CK5-X.X |
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SOT-25 (K5) |
X.X = Fixed Output Voltages from 2.0V to 6.0V |
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N.C. |
ON/OFF |
ON/OFF (Enable) Function |
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5 |
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4 |
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Part No |
ON/Off |
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VOUT |
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1 |
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2 |
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3 |
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B4252 |
High |
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ON |
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Low |
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OFF |
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VOUT |
Vin |
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GND |
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Top View
Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 |
www.baylinear.com |
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B4252 |
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Absolute Maximum Ratings |
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Parameter |
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Symbol |
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Ratings |
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Units |
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Input Voltage |
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VIN |
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12 |
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V |
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Output Current |
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IOUT |
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500 |
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mA |
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Output Voltage |
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VOUT |
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VSS -0.3 to VIN 0.3 |
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V |
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On/Off Voltage |
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On/Off |
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VSS -0.3 to VIN+ 0.3 |
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V |
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Continual Total Power Dissipation |
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SOT-25 |
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Pd |
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150 |
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mW |
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SOT-89 |
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300 |
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Operating Ambient Temperature |
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TOPR |
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-30 to 80 |
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°C |
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Storage Temperature |
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TSTG |
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-40 to 125 |
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°C |
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Electrical Characteristics (Ta = 25°C, VIN = VOUT + 0.5V; unless otherwise noted) |
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Parameter |
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Conditions |
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MIN |
TYP |
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MAX |
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UNIT |
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Output Voltage Accuracy |
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IO = 1mA |
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-1.4% |
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+1.4% |
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V |
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IO = 0 to 150mA |
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-2% |
- |
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+2% |
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Line Regulation |
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IO= 100mA, |
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0.2 |
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0.3 |
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%/V |
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∆VOUT/∆VIN-VOUT |
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(VOUT + 0.1V)<VIN<6V |
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Load Regulation |
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VIN 6V, 0mA < IO < 120mA COUT = 1µF |
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0.01 |
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0.04 |
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%/mV |
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Maximum Output Current |
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250 |
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mA |
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Current Limit |
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160 |
500 |
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Shutdown Supply Current |
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TA=25°C |
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0.01 |
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1 |
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µA |
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Shutdown Input Bias Current |
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VSHDN=VIN, TA=25°C |
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0.01 |
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100 |
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nA |
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Shutdown Exit Delay |
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CBP=0µF COUT=1µF, IO = 1mA |
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30 |
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150 |
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µsec |
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Shutdown Input Threshold Low |
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Vin=2.5 to 5.5V |
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0.4 |
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V |
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Shutdown Input Threshold High |
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Vin=2.5 to 5.5V |
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2 |
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V |
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Ground Pin Current |
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IOUT = 0mA……150mA |
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2 |
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5 |
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µA |
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Dropout Voltage |
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IO = 150mA |
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160 |
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250 |
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mV |
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IO = 250 mA |
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200 |
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280 |
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Thermal Shutdown Temperature |
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155 |
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°C |
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Marking Format |
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SOT-25 |
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FXWW |
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F = B4252 |
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Variables |
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X = Voltage Codes |
WW = Work Week Code |
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B = 2.0 |
F = |
3.3 |
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SOT-25 = 01 to 99 |
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C = 2.5 |
G = |
3.5 |
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D = 2.8 |
H = |
5.0 |
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E = 3.0 |
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Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 |
www.baylinear.com |