LM2931AZ5X

www.fairchildsemi.com LM2931A Low Dropout Voltage Regulator Features 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. Limited input voltage and high efficiency. Internal thermal over load protection. 60V load dump protection. Output current up to 0.1A. TO-92 1 1: Output 2: GND 3: Input Internal Block Diagram 0.6V MAX DROP PASS ELEMENT Input VI Output VO 3 1 OVER VOLTAGE PROTECTION CURRENT LIMIT + START _ THERMAL SHUTDOWN REFERENCE VOLTAGE GND 2 Rev. 1.0.0 ©2001 Fairchild Semiconductor Corporation LM2931A Absolute Maximum Ratings Parameter Input Voltage Symbol Value Unit Vi 33 V Over Protection Voltage V(OP) 60 V Operating Temperature Range TOPR -40~+125 °C TJ 150 °C TSTG -65~+150 °C Conditions Min. Typ. Max. Unit Maximum Junction Temperature Storage Temperature Range Electrical Characteristics (VI =14V, IO =10mA, CO =100µF, TA = 25 oC) Parameter Output Voltage (I) VO (I) VI = 14V, IO = 10mA 4.81 5.0 5.19 V Output Voltage (II) VO (II) VI = 6 ~ 26V, IO = 100mA TJ = -40 ~ +125 oC 4.75 5.0 5.25 V Line Regulation (I) ∆VO (I) VI = 9 ~ 16V, IO = 10mA - 2.0 10 mV Line Regulation (II) ∆VO (II) VI = 6 ~ 26V, IO = 10mA - 4.0 30 mV Load Regulation ∆VO (III) VI = 14V, IO = 5 ~ 100mA Output Impedance ZO - 10 50 mV VI = 14V, IO = 100mA - 100 600 mΩ Quiescent Current (I) IQ (I) VI = 6 ~ 26V, IO ≤10mA - 0.1 1.0 mA Quiescent Current (II) IQ (II) VI = 14V, IO ≤ 100mA - 5.0 30 mA Output Noise Voltage VN VI = 14V, IO = 10mA, f = 10Hz ~ 100KHz - 150 1000 µVrms Ripple Rejection RR VI = 14V, IO = 10mA, f = 120Hz 55 80 - dB Dropout Voltage (I) VD (I) IO = 10mA, VD = VI - VO - 0.03 0.2 V Dropout Voltage (II) VD (II) IO = 100mA, VD = VI - VO - 0.1 0.6 V IO = 10mA 26 33 - V VI = 14V, IO =10mA, Time =100ms 60 70 - V Max Operational Input Voltage Max Line Transient VIN VLT(MAX) Reverse Polarity Input Voltage DC VI(DC) VI = 14V, IO = 10mA, VO ≥ -0.3V - 15 - 30 - V Reverse Polarity Input Voltage Transient VI(TR) VI = 14V, IO = 10mA, Time ≤ 10ms - 50 - 80 - V VI = 14V 200 400 600 mA Peak Output Current 2 Symbol IPK LM2931A Typical Perfomance Characteristics FIG.1 Output Voltage vs. Input Voltage FIG.2 10 Quiescent current Iq(mA) 7 Output voltage Vo(V) Quiescent vs. Input Voltage 6 5 4 3 2 1 8.0 6.0 4.0 RL= 50 Ω 2.0 RL= 500 Ω 0 0 0 5 10 0 15 10 Figure 1. Output Voltage vs. Input Voltage FIG.4 Dropout voltage Vdrop(㎷) Ripple Rejection Ratio(㏈) 90 40 50 85 VIN = 14V VOUT = 5.0V f = 120 ㎐ T J = 25 ℃ Drop Voltage vs. Output Current 240 VIN = 14V △ VOUT = 100 ㎷ T J = 25 ℃ 200 160 120 80 40 65 0 20 40 60 80 0 100 0 Output Current (㎃) 40 60 80 100 120 Figure 4. Drop Voltage vs. Output Current FIG.5 Output Voltage vs. Temperature(Tj) FIG.6 5.06 Quiescent Current vs. Temperature(Tj) Quiescent current Iq(mA) 1 5.04 5.02 5.00 4.98 4.96 4.94 4.92 -25 20 Output Current (㎃) Figure 3. Ripple Rejection vs. Output Voltage Outout voltage Vo(V) 30 Figure 2. Quiescent Current vs. Input Voltage FIG.3 Ripple Rejection vs. Output Voltage 75 20 Input voltage Vin (V) Input voltage Vin (V) 0.8 0.6 0.4 0.2 0 0 25 50 75 100 125 Temperature Tj(℃) Figure 5. Output Voltage vs. Temperature(Tj) -25 0 25 50 75 100 125 Junction temperature Tj(℃) Figure 6. Quiescent Current vs. Temperature(Tj) 3 LM2931A Typical Application 3 VI CI 0.1 µ F LM2931A KA76L05 IQ 1 2 VO Co 100 µ 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 +0.25 4.58 ±0.20 4.58 –0.15 14.47 ±0.40 0.46 ±0.10 1.27TYP [1.27 ±0.20] 1.27TYP [1.27 ±0.20] +0.10 0.38 –0.05 (0.25) +0.10 0.38 –0.05 1.02 ±0.10 3.86MAX 3.60 ±0.20 (R2.29) 5 LM2931A Ordering Information 6 Product Number Package Operating Temperature LM2931AZ5 TO-92 -40°C to + 125°C 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. 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. www.fairchildsemi.com 5/19/01 0.0m 001 Stock#DSxxxxxxxx  2001 Fairchild Semiconductor Corporation