 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| www.fairchildsemi.com LM2931A Low Dropout Voltage Regulator Features * * * * Limited input voltage and high efficiency. Internal thermal over load protection. 60V load dump protection. Output current up to 0.1A. Description LM2931A is a fixed 3-terminal low dropout voltage regulator designed to need very low quiescent current. Internally, implemented circuits include 60V load dump protection, -50V reverse transient short circuit and thermal over load protection. TO-92 1 1: Output 2: GND 3: Input Internal Block Diagram 0.6V MAX DROP Input VI 3 PASS ELEMENT Output VO 1 OVER VOLTAGE PROTECTION CURRENT LIMIT START _ THERMAL SHUTDOWN REFERENCE VOLTAGE GND 2 (c)2001 Fairchild Semiconductor Corporation + Rev. 1.0.0 LM2931A Absolute Maximum Ratings Parameter Input Voltage Over Protection Voltage Operating Temperature Range Maximum Junction Temperature Storage Temperature Range Symbol Vi V(OP) TOPR TJ TSTG Value 33 60 -40~+125 150 -65~+150 Unit V V C C C Electrical Characteristics (VI =14V, IO =10mA, CO =100F, TA = 25 oC) Parameter Output Voltage (I) Output Voltage (II) Line Regulation (I) Line Regulation (II) Load Regulation Output Impedance Quiescent Current (I) Quiescent Current (II) Output Noise Voltage Ripple Rejection Dropout Voltage (I) Dropout Voltage (II) Max Operational Input Voltage Max Line Transient Reverse Polarity Input Voltage DC Reverse Polarity Input Voltage Transient Peak Output Current Symbol VO (I) VO (II) VO (I) VO (II) ZO IQ (I) IQ (II) VN RR VD (I) VD (II) VIN VLT(MAX) VI(DC) VI(TR) IPK Conditions VI = 14V, IO = 10mA VI = 6 ~ 26V, IO = 100mA TJ = -40 ~ +125 oC VI = 9 ~ 16V, IO = 10mA VI = 6 ~ 26V, IO = 10mA VI = 14V, IO = 100mA VI = 6 ~ 26V, IO 10mA VI = 14V, IO 100mA VI = 14V, IO = 10mA, f = 10Hz ~ 100KHz VI = 14V, IO = 10mA, f = 120Hz IO = 10mA, VD = VI - VO IO = 100mA, VD = VI - VO IO = 10mA VI = 14V, IO =10mA, Time =100ms VI = 14V, IO = 10mA, VO -0.3V VI = 14V, IO = 10mA, Time 10ms VI = 14V Min. 4.81 4.75 55 26 60 - 15 - 50 200 Typ. 5.0 5.0 2.0 4.0 10 100 0.1 5.0 150 80 0.03 0.1 33 70 - 30 - 80 400 Max. 5.19 5.25 10 30 50 600 1.0 30 1000 0.2 0.6 600 Unit V V mV mV mV m mA mA Vrms dB V V V V V V mA VO (III) VI = 14V, IO = 5 ~ 100mA 2 LM2931A Typical Perfomance Characteristics FIG.1 7 Output Voltage vs. Input Voltage 10 FIG.2 Quiescent current Iq(mA) Quiescent vs. Input Voltage Output voltage Vo(V) 6 5 4 3 2 1 0 0 5 10 15 8.0 6.0 4.0 RL= 50 2.0 RL= 500 0 0 10 20 30 40 50 Input voltage Vin (V) Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage Figure 2. Quiescent Current vs. Input Voltage FIG.3 Ripple Rejection vs. Output Voltage Ripple Rejection Ratio() FIG.4 Dropout voltage Vdrop() 240 200 160 120 80 40 Drop Voltage vs. Output Current 90 85 VIN = 14V VOUT = 100 TJ = 25 75 VIN = 14V VOUT = 5.0V f = 120 TJ = 25 65 0 20 40 60 80 100 0 0 20 40 60 80 100 120 Output Current () Output Current () Figure 3. Ripple Rejection vs. Output Voltage Figure 4. Drop Voltage vs. Output Current FIG.5 Output Voltage vs. Temperature(Tj) 5.06 1 FIG.6 Quiescent Current vs. Temperature(Tj) Outout voltage Vo(V) 5.04 5.02 5.00 4.98 4.96 4.94 4.92 -25 Quiescent current Iq(mA) 0.8 0.6 0.4 0.2 0 0 25 50 75 100 125 -25 0 25 50 75 100 125 Temperature Tj() Junction temperature Tj() Figure 5. Output Voltage vs. Temperature(Tj) Figure 6. Quiescent Current vs. Temperature(Tj) 3 LM2931A Typical Application VI CI 0.1 F 3 LM2931A KA76L05 IQ 2 1 VO Co 100 F Figure 1. Application Circuit * Ci is required if regulator is located an appreciable distance from power supply filter. * Co improves stability . 4 LM2931A Mechanical Dimensions Package Dimensions in millimeters TO-92 4.58 -0.15 +0.25 14.47 0.40 0.46 0.10 4.58 0.20 1.27TYP [1.27 0.20] 3.60 0.20 1.27TYP [1.27 0.20] 0.38 -0.05 +0.10 3.86MAX 1.02 0.10 0.38 -0.05 +0.10 (R2.29) (0.25) 5 LM2931A Ordering Information Product Number LM2931AZ5 Package TO-92 Operating Temperature -40C to + 125C 6 LM2931A 7 LM2931A DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 5/19/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
Price & Availability of LM2931A
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |