100mA Adjustable Positive Voltage Regulator LA317L
100mA Adustable Positive Voltage Regulator
General Description
• The LA317L is an adjustable 3-terminal positive voltage regulator capable of supplying 100mA over a 1.2V to 12V output range. This voltage regulator is exceptionally easy to use and requires only tow external resistors to set the output voltage. • The LA317L is available in standard TO-92 and SOP-8 packages.
TO-92
SOP-8
Features
• • • • • • • • • Adjustable output down to 1.2V Guaranteed 100mA output current Output short circuit protected Line regulation: 0.01%/V Load regulation: 0.1% Constant current limit over temperature Standard 3-lead transistor package Input ripple rejection: 70dB RoHS Compliance
Applications
• • • • High Efficiency Linear Regulators Post Regulation for Switching Supplies Microprocessor Power Supply Mother Board I/O Power Supply
Ordering Information
TAITRON COMPONENTS INCORPORATED www.taitroncomponents.com
Tel: Fax: (800)-TAITRON (800)-824-8766 (800)-TAITFAX (800)-824-8329 (661)-257-6060 (661)-257-6415
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100mA Adjustable Positive Voltage Regulator LA317L
Pin Configuration
Outline: Z TO-92
Outline: S8 SOP-8
Block Diagram
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100mA Adjustable Positive Voltage Regulator LA317L
Absolute Maximum Ratings (Ta=25° C, unless otherwise specified)
Symbol VIN-VOUT IO TJ TOPR TSTG PD TLEAD Description Input - Output Voltage Differential Max. Output Current Operating Junction Temperature Operating Temperature Range Storage Temperature Range Power Dissipation Lead Temperature (Soldering, 4sec.) Ratings 40 100 150 -20 ~ 85 -65 ~ 150 700 260 Unit V mA °C °C °C mW °C
Electrical Characteristics
(VIN-VOUT=5V, IOUT=40mA,PD≤625mW, 0ºC ≤TJ≤125ºC, unless otherwise specified) Symbol Description LA317L
Min. Typ. Max.
Unit
Conditions TJ=25°, 3V≤VIN-VOUT≤15V, IOUT≤20mA (Note) 3V≤VIN-VOUT≤15V, IOUT≤20mA (Note) TJ=25°, 5mA≤IOUT≤100mA (Note) 5mA≤IOUT≤101mA (Note)
∆VOUT/VOUT Line Regulation ∆VOUT Load Regulation Thermal Regulation IADJ ∆IADJ VREF ILIMIT IL(MIN) PSRR Adjustable Pin Current Adjustable Pin Current Change Reference Input Voltage Current Limit Minimum Load Current for Regulation Ripple Rejection Temperature Stability 1.20 100 60 -
0.01 0.02 0.1 0.3 0.04 50 0.2 1.25 200 3.5 62 70 0.65
0.04 %/V 0.07 0.5 1.5 0.2 100 5 1.30 300 5 % %
%/W TJ=25°, 10ms Pulse µA µA V mA mA dB % 3V≤VIN-VOUT≤15V,
5mA≤IOUT≤100mA 3V≤VIN-VOUT≤15V, 5mA≤IOUT≤100mA
3V≤VIN-VOUT≤13V 3V≤VIN-VOUT≤13V VOUT=10V, f=120Hz, CADJ=0µF VOUT=10V, f=120Hz, CADJ=10µF 0° C ≤TJ≤125° C
Rev. A/DX 2007-06-04
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Page 3 of 9
100mA Adjustable Positive Voltage Regulator LA317L
Symbol Description Long Term Stability RMS Output Noise (% of VOUT) Thermal Resistance Junction to Case LA317L
Min. Typ. Max.
Unit % %
° C/W
Conditions TJ=125° C, 1000 Hours TJ=125° C, 10Hz≤f≤10KHz TO-92 SOP-8
-
0.3 0.003 185 175
-
Note: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle.
Changes in output voltage due to heating effects are covered under the specification of thermal regulation.
Typical Characteristics Curves
Fig.1- Load Regulation vs. Temperature Output Voltage Deviation (V) Fig.2- Output Voltage vs. Input Voltage
Output Voltage (V)
Temperature (° C) Fig.3- Reference Voltage vs. Temperature Adjust Pin Current (μA) Reference Voltage (V)
Input Voltage (V) Fig.4- Adjust Pin Current vs. Temperature
Temperature (° C)
Temperature (° C)
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100mA Adjustable Positive Voltage Regulator LA317L
Typical Characteristics Curves (Continued)
Fig.5- Dropout Voltage vs. Temperature Input-Output Differential (V) Quiescent Current (mA) Fig.6- Minimum Operating Current
Temperature (° C)
Input-Output Differential (V)
Fig.7- Ripple Rejection vs. Output Voltage Ripple Rejection (dB)
Fig.8- Ripple Rejection vs. Frequency
Ripple Rejection (dB)
Output Voltage (V)
Frequency (Hz)
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100mA Adjustable Positive Voltage Regulator LA317L
Typical Characteristics Curves (Continued)
Fig.9- Load Transient Response (Conditions: VIN=10.25V, VOUT=5.25V, CIN=0.1μF, COUT=1μF, TA=25℃) ΔVOUT (200mV/Div) ΔVOUT (200mV/Div) Fig.10- Line Transient Response (Conditions: VIN=10.25 to 11.25V, IOUT=40mA, VOUT=5.25V, CIN=0.1μF, COUT=1μF, TA=25℃)
IOUT (50mA/Div)
ΔVIN (0.5V/Div)
Time (200μs/Div)
Time (200μs/Div)
Typical Application
Fig.11- 5V Logic Regulator with Electronic Shutdown (Minimum output=1.2V)
Fig.12- Adjustable Regulator with Improved Ripple Rejection Note: Discharge C1 if output is shorted to ground
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100mA Adjustable Positive Voltage Regulator LA317L
Typical Application (Continued)
Fig.13- Slow Turn-on 15V Regulator
Dimensions in mm (inches)
TO-92
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100mA Adjustable Positive Voltage Regulator LA317L
Dimensions in mm (inches) (Continued)
SOP-8
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100mA Adjustable Positive Voltage Regulator LA317L
How to contact us:
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