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LM7815 的PDF资料 下载 ,516K

LM7815 的货源和报价 LM7815 的相关技术信息

相关型号

LM7806 LM7808 LM7809 LM7812 LM78L LM78L05 LM78L05A LM833

Cross Referenced National Parts for LM7815

LM340

DISCLAIMER : National Semiconduct or's cross reference parts are functionally equivalent to other manufacturers' published information. These parts may not be pin compatible and we recommend that you completely review our datasheet to confirm the device functionality for your application. This information is based on our best estimate of other manufacturers' published information a t the time we collected this match. This information is for suggestion purposes only. National Semiconductor is not responsible for any incorrect or incomplete information.

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These Product Folders may be useful: See all results in Product Folders    LM340 - Series 3-Terminal Positive Regulators LM340T15 7815 P+ 6 weeks    LM140 - Series 3-Terminal Positive Regulators TO-220 (T) General Description The LM140/LM340A/LM340/LM7800C monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. More... Typical Application See Datasheet for Application Information These Datasheets may be useful: See all results in Datasheets    DS CP3UB26.fm At logic low reset pulse when the power supply rises above a power-up an internal 14-bit counter is set to 3FFFh and threshold voltage. Various reset thresholds are available for begins counting down to 0 after the crystal oscillator the LM809, however the options for 2.93V and 3.08V are becomes stable. When this counter reaches 0, the on-    DS CP3CN23.fm The LM809 produces a 240-ms logic low reset pulse when the power supply rises above a threshold voltage. Various reset thresholds are available for the LM809, however the options for 2.93V and 3.08V are most suitable for a CP3CN23 device operating from an IOVCC at 3.0V to 3.3V. IOVCC IOVCC CP3CN23 LM809 3-Pin Reset Circuit RESET GND DS500 Figure 8. Simple External Reset www.national.com 54 CP3CN23 11.8.2 Manual and SDI External Reset 11.8.3 Fault-Tolerant External Reset An external reset circuit based on the LM3724 5-Pin Microprocessor Reset Circuit is shown in Figure 9.    DS CP3BT26.fm Baseband (Link Controller) hardware minimizes the bandwidth demand on the CPU ! Link Manager (LM) ! Logical Link Control and Adaptation Protocol (L2CAP) !    DS CP3BT23.fm Baseband (Link Controller) hardware minimizes the bandwidth demand on the CPU ! Link Manager (LM) ! Logical Link Control and Adaptation Protocol (L2CAP) !    LM340/LM78XX Series 3-Terminal Positive Regulators Conditions (Note 6) Min 7.7 LM7808C Typ 8.0 6.0 2.0 12 4.0 7.6 4.3 Max 8.3 160 80 160 80 8.4 8.0 1.0 0.5 52 56 72 2.0 16 0.45 2.2 0.8 Units V mV mV 11.5V VI 23V, 5.0 mA IO 1.0A, P 15W TJ = 25°C With Line With Load 11.5V VI 25V 5.0 mA IO 1.0A TA = 25°C, 10 Hz f 100 kHz f = 120 Hz, IO = 350 mA, TJ = 25°C IO = 1.0A, TJ = 25°C f = 1.0 kHz TJ = 25°C, VI = 35V TJ = 25°C IO = 5.0 mA V mA mA µV dB V m A A mV/°C 7 www.national.com LM340/LM78XX Typical Performance Characteristics Maximum Average Power Dissipation Maximum Average Power Dissipation 00778122 00778123 Maximum Power Dissipation (TO-263) (See Note 2) Output Voltage (Normalized to 1V at TJ = 25°C) 00778124 00778125 Note: Shaded area refers to LM340A/LM340, LM7805C, LM7812C and LM7815C. Ripple Rejection Ripple Rejection 00778126 00778127 www.national.com 8 LM340/LM78XX Typical Performance Characteristics Output Impedance (Continued) Dropout Characteristics 00778128 00778129 Quiescent Current Peak Output Current 00778130 ...    PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs[dagger] or 8-bit word length is selected two Stop bits are generated The Receiver checks the first Stopbit only regardless of the number of Stop bits selected TABLE III Baud Rates Divisors and Crystals 1 8432 MHz Cystal Baud Rate 7 50 15 1 10 15 34 350 600 1 00 1200 2800 2000 3400 4600 7800 9200 1 600 39200 58400 6000 N 128000 Decimal Divisor for 16 c Clock 2304 1536 1047 857 768 384 192 96 64 58 48 32 24 16 12 6 3 2 Percent Error 3 072 MHz Crystal Decimal Divisor for 16 c Clock 3840 2560 1745 1428 1280 640 320 160 107 96 80 53 40 27 20 10 5 Percent Error 18 432 MHz Crystal Decimal Divisor for 16 c Clock 23040 15360 10473 8565 7680 3840 1920 920 640 576 480 320 240 160 120 60 30 21 9 Percent Error 0 026 0 058 0 026 0 034 0 312 0 69 0 628 1 23 2 86 2 04 ote For baud rates of 250k 300k 375k 500k 750k and 1 5M using a 24 MHz crystal causes minimal error 15 80 Registers (Continued) 84 LINE STATUS REGISTER This register provides status information to the CPU concerning the data transfer Table II shows the conte ...    PC16552D Dual Universal Asynchronous Receiver/Transmitter with FIFOs[dagger] or 8-bit word length is selected two Stop bits are generated The receiver checks the first Stop bit only regardless of the number of Stop bits selected Bit 3 This bit is the Parity Enable bit When bit 3 is a logic 1 a Parity bit is generated (transmit data) or checked (receive data) between the last data bit and Stop bit of the serial data (The Parity bit is used to produce an even or odd number of 1s when the data bits and the Parity bit are summed ) Bit 4 This bit is the Even Parity Select bit When parity is enabled and bit 4 is a logic 0 an odd number of logic 1s is transmitted or checked in the data word bits and Parity bit When parity is enabled and bit 4 is a logic 1 an even number of logic 1s is transmitted or checked Bit 5 This bit is the Stick Parity bit When parity is enabled it is used in conjunction with bit 4 to select Mark or Space Parity When bits 3 4 and 5 are logic 1 the Parity bit is transmitted and checked as a logic 0 (Space Parity) If bits 3 and 5 are 1 and bit 4 is a logic 0 then the Par ... These National Edge may be useful: See all results in National Edge    Featured Article: Engineers note: Capacitors are key to voltage regulator design Linear regulators A dangerous precedent was established by the first linear regulator semiconductors sold commercially like the LM7805 type devices: they require no input or output capacitor and are completely stable under virtually any operating conditions. Some of the newer LDO regulators require careful attention to external capacitors to operate in a stable mode. These Application Notes may be useful: See all results in Application Notes    Application Note 182 Improving Power Supply Reliability with IC Power Regulators The on-chip current limit is usually set by the manufacturer so that with worst-case production variations and operating temperature the device will still provide rated output current. Older types of regulators, such as the LM309, LM340 or LM7800 can have current limits of 3 times their rated output current. The current limit circuitry in these devices uses the turn-on voltage of an emitter-base junction of a transistor to set the current limit.    Application Note 181 3-Terminal Regulator is Adjustable Current limit is set internally at about 2.2A and the current limit remains constant with temperature. Older devices such as the LM309 or LM7800 regulators use the turn-on of an emitter-base junction of a transistor to set the current limit. This causes current limit to typically change by a factor of 2 over a -55°C to +150°C temperature range.    Application Note 222 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise 00692208 FIGURE 8. Correcting for Residual or Source Generated Drift Voltage Reference Voltage references utilizing the bandgap voltage of silicon were first used 8 years ago, and have since gained wide acceptance in such circuits as the LM109, LM113, LM340, LM117, µA7800, AD580, and REF 01. The theory has been well publicized and is not reiterated here.    Application Note 1208 LM2633 Evaluation Board The voltage across this resistor is compared with the VDS of the top MOSFET to determine if an over-current condition has occurred in Channel 1. 20025701 48-Lead TSSOP (MTD) Order Number LM2633MTD See NS Package Number MTD48 Pin Descriptions FB1 (Pin 1): The feedback input for Channel 1. Connect to the load directly.    FET Circuit Applications FET Circuit Applications FET Circuit Applications National Semiconductor Application Note 32 February 1970 Polycarbonate dielectric TL H 6791 ­ 1 Sample and Hold With Offset Adjustment The 2N4339 JFET was selected because of its low lGSS (k100 pA) very-low lD(OFF) (k50 pA) and low pinchoff voltage Leakages of this level put the burden of circuit performance on clean solder-resin free low leakage circuit layout TL H 6791 ­ 3 TL H 6791 ­ 2 Long Time Comparator The 2N4393 is operated as a Miller integrator The high Yfs of the 2N4393 (over 12 000 mmhos 5 mA) yields a stage gain of about 60 Since the equivalent capacitance looking into the gate is C times gain and the gate source resistance can be as high as 10 MX time constants as long as a minute can be achieved JFET AC Coupled Integrator This circuit utilizes the ``m-amp'' technique to achieve very high voltage gain Using C1 in the circuit as a Miller integrator or capacitance multiplier allows this simple circuit to handle very long time constants AN See our Answers/FAQs to these common questions: See all results in Answers/FAQs    Can I parallel two LM78xx linear regulators? Paralleling of 3-terminal regulators is generally not recommended because the devices will not share current equally. If, for instance, you try to make a 2 Amp regulator using two LM7812s or two LM7815s, the device with the higher output voltage could be carrying more load than the other. Or even worse, the second regulator may be totally off. These Misc Documents may be useful: See all results in Misc Documents    Linear and Switching Voltage Regulator Fundamentals (PDF) FIXED OUTPUT REGULATORS A typical application will be examined using an LM7805 three-terminal regulator (see Figure 16). IN LM7805 OUT GND RWP IL IN LM7805 GND OUT R WP IL V IN VOUT RL RW N V LOAD V IN VOUT R LOAD V LOAD RW N V LOAD = VOUT - IL ( R W P + RW N ) V LOAD = VOUT -    COP8 COBALT User's Manual (COP8 Oriented Breadboard and Learning Tool) Prototyping Board for COP8 OTP/ROM 9 procob1manual.doc COP8 COBALT User Manual v1.0 Schematic Diagram for COBALT Board C2 J3 Power Input D3 D1 U5 LM7805CT Vin +5V C2 G4 G6 G5 F0 SW1 PUSH BUTTON SO 1 VCC To All +5V Points 1N4001 1N4001 3 SI SK U3 C3 G5 G4 G6 1 2 3 4 CS VCC SK NC DI NC DO GND 8 7 6 5 VCC GND Servo 1 Servo 2 L4 L5 F1 SW2 PUSH BUTTON C6 100uF 2 C7 100uF uWIRE ORG x8 JP3 F2 L6 F3 L7 C0 C1 F5 VCC F4 SW3 PUSH BUTTON SW4 PUSH BUTTON SW5 PUSH BUTTON SW6 PUSH BUTTON D2 D4 Power Switch Jumper 1N4001 1N4001 Servo 3 Servo 4 Servo 5 Servo 6 NM93C06/46/56/66/86 R1 10K C3 4.7uF C1 4.7uF C? 100uF C? 100uF F6 SW7 PUSH BUTTON J1 DB9 5 9 4 8 3 7 2 6 1 C2 4.7uF C4 4.7uF 1 2 3 4 5 6 7 8 U2 C1+ VCC V+ GND C1DOUT1 C2+ RIN1 C2ROUT1 VDIN1 DOUT2 DIN2 RIN2 ROUT2 16 15 14 13 12 11 10 9 +5V F7 SW8 PUSH BUTTON VCC L3 L2 L0 L1 R14 Port C BUS (4 Lines) Port G BUS (8 Lines) U1 8 VCC G0/INT G1 G2 G3/TIO G4/SO G5/SK G6/SI G7/CKO L0 L1 L2 L3 L4 L5 L6 L7 D0 D1 D2 D3 D4 D5 D6 D7 35 36 37 38 3 4 5 6 17 18 19 20 21 22 23 24 25 2    Application Note 1151 COP8 FLASH ISP HANDBOOK - Parallel Port Programming Adapter A 9V battery and clip is necessary to power up the target microcontroller. The LM7805 voltage regulator is used to reduce the 9 volts to 5 volts for the target microcontroller. A low current LED is used to determine if the regulator is working properly. These Obsolescence may be useful: See all results in Obsolescence    Discontinued Last Updated on: 03/16/2007 NSID Alternate Source LTB Expiration 100301 MW8 100301DMQB NATIONAL SEM09/03/2002 00: 100301DMQB 100301FMQB NATIONAL SEM12/02/2003 00: 100301FC NONE NSC SYNERGY 04/04/95 00:00 100301FMQB NONE NONE 09/13/2005 00: 100301J-QMLV 100301W-QMLV NATIONAL SEM12/02/2003 00: 100302 MW8 100302DMQB NATIONAL SEM09/03/2002 00: 100302DMQB NONE NONE 09/13/2005 00: 100302FC NONE NSC SYNERGY 04/04/95 00:00 100302FMQB NONE NONE 09/13/2005 00: 100302QI NONE 03/03/2004 00: 100304 MW8 100304DMQB NATIONAL SEM09/03/2002 00: 100304DMQB NONE NONE 09/13/2005 00: 100304FC NONE NSC SYNERGY 04/04/95 00:00 100304FMQB NONE NONE 09/13