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Details, datasheet, quote on part number:LM2984
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| Part: | LM2984 |
| Category: | Power Management => Regulators => Linear Voltage Regulators => LDO (Low Drop Out) => Positive Voltage->Fixed |
| Description: | LM2984 - Microprocessor Power Supply System, Package: to 220, Pin Nb=11 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM2984 datasheet File size : 409 kB |
| Request For quote: | Find where to buy LM2984
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Datasheet text preview:
LM2984 Microprocessor Power Supply System
April 1998
LM2984 Microprocessor Power Supply System
General Description
The LM2984 positive voltage regulator features three independent and tracking outputs capable of delivering the power for logic circuits, peripheral sensors and standby memory in a typical microprocessor system. The LM2984 includes circuitry which monitors both its own high-current output and also an external µP. If any error conditions are sensed in either, a reset error flag is set and maintained until the malfunction terminates. Since these functions are included in the same package with the three regulators, a great saving in board space can be realized in the typical microprocessor system. The LM2984 also features very low dropout voltages on each of its three regulator outputs (0.6V at the rated output current). Furthermore, the quiescent current can be reduced to 1 mA in the standby mode. Designed also for vehicular applications, the LM2984 and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. Familiar regulator features such as short circuit and thermal overload protection are also provided. Fixed outputs of 5V are available in the plastic TO-220 power package.
Features
n n n n n n n n n n n n n n Three low dropout tracking regulators Output current in excess of 500 mA Fully specified for -40°C to +125°C operation Low quiescent current standby regulator Microprocessor malfunction RESET flag Delayed RESET on power-up Accurate pretrimmed 5V outputs Reverse battery protection Overvoltage protection Reverse transient protection Short circuit protection Internal thermal overload protection ON/OFF switch for high current outputs P+ Product Enhancement tested
Typical Application Circuit
DS011252-1
COUT must be at least 10 µF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating temperature range as the regulator. The equivalent series resistance (ESR) of this capacitor is critical; see curve.
Order Number LM2984T See NS Package Number TA11B
© 1998 National Semiconductor Corporation
DS011252
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Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage Survival Voltage ( < 100 ms) Operational Voltage Internal Power Dissipation 60V 26V Internally Limited
Operating Temperature Range (TA) Maximum Junction Temperature (Note 3) Storage Temperature Range Lead Temperature (Soldering, 10 sec.) ESD Susceptability (Note 5)
-40°C to +125°C 150°C -65°C to +150°C 230°C 2000V
Electrical Characteristics
VIN = 14V, IOUT = 5 mA, COUT = 10 µF, unless otherwise indicated. Boldface type refers to limits over the entire operating temperature range, -40°C TA +125°C, all other limits are for TA = Tj = 25°C (Note 8) . Parameter VOUT (Pin 11) Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Long Term Stability Ripple Rejection Dropout Voltage Current Limit Maximum Operational Input Voltage Maximum Line Transient Reverse Polarity Input Voltage DC Reverse Polarity Input Voltage Transient T 100 ms, ROUT = 100 -55 -35/-35 Vmin VOUT 6V, ROUT = 100, T 100 ms VOUT -0.6V, ROUT = 100 65 -30 60/60 -15/-15 Vmin Vmin Continuous DC fo = 120 Hz IOUT = 500 mA IOUT = 250 mA 5 mA IO 500 mA 6V VIN 26V 9V VIN 16V 7V VIN 26V 5 mA IOUT 500 mA 250 mAdc and 10 mArms, fo = 120 Hz IOUT = 500 mA IOUT = 250 mA 10 Hz 100 kHz, IOUT = 100 mA 2 5 12 24 38 14 100 20 70 0.53 0.28 0.92 32 60/50 0.80/1.1 0.50/0.70 0.75/0.60 26/26 100/100 50/50 5.00 4.85/4.75 5.15/5.25 25/25 50/50 50/50 Vmin Vmax mVmax mVmax mVmax m mAmax mAmax µV mV/1000 hr dBmin Vmax Vmax Amin Vmin Conditions Typical Limit (Note 4) Units
Electrical Characteristics
VIN = 14V, Ibuf = 5 mA, Cbuf = 10 µF, unless otherwise indicated. Boldface type refers to limits over the entire operating temperature range, -40°C TA +125°C, all other limits are for TA = Tj = 25°C (Note 8) . Parameter Vbuffer (Pin 10) Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current 5 mA IO 100 mA 6V VIN 26V 9V VIN 16V 7V VIN 26V 5 mA Ibuf 100 mA 50 mAdc and 10 mArms, fO = 120 Hz Ibuf = 100 mA 2 5 15 200 8.0 15/15 5.00 4.85/4.75 5.15/5.25 25/25 50/50 50/50 Vmin Vmax mVmax mVmax mVmax m mAmax Conditions Typical Limit (Note 4) Units
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Electrical Characteristics
Parameter Vbuffer (Pin 10) Output Noise Voltage Long Term Stability Ripple Rejection Dropout Voltage Current Limit Maximum Operational Input Voltage Maximum Line Transient Reverse Polarity Input Voltage DC Reverse Polarity Input Voltage Transient
(Continued)
VIN = 14V, Ibuf = 5 mA, Cbuf = 10 µF, unless otherwise indicated. Boldface type refers to limits over the entire operating temperature range, -40°C TA +125°C, all other limits are for TA = Tj = 25°C (Note 8) . Conditions Typical Limit (Note 4) 10 Hz 100 kHz, IOUT = 100 mA fo = 120 Hz Ibuf = 100 mA Continuous DC Vbuf 6V, Rbuf = 100, T 100 ms Vbuf -0.6V, Rbuf = 100 T 100 ms, Rbuf = 100 -30 -55 -15/-15 -35/-35 Vmin Vmin 100 20 70 0.35 0.23 32 65 60/50 0.50/0.80 0.15/0.15 26/26 60/60 µV mV/1000 hr dBmin Vmax Amin Vmin Vmin Units
Electrical Characteristics
VIN = 14V, Istby = 1 mA, Cstby = 10 µF, unless otherwise indicated. Boldface type refers to limits over the entire operating temperature range, -40°C TA +125°C, all other limits are for TA = Tj = 25°C (Note 8) . Parameter Vstandby (Pin 9) Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Long Term Stability Ripple Rejection Dropout Voltage Current Limit Maximum Operational Input Voltage Maximum Line Transient Reverse Polarity Input Voltage DC Reverse Polarity Input Voltage Transient 4.5V Vstby 6V, Rstby = 1000 Vstby 6V, T 100 ms, Rstby = 1000 Vstby -0.6V, Rstby = 1000 T 100 ms, Rstby = 1000 fo = 120 Hz Istby = 1 mA Istby = 7.5 mA 1 mA IO 7.5 mA 6V VIN 26V 9V VIN 16V 7V VIN 26V 0.5 mA IOUT 7.5 mA 5 mAdc and 1 mArms, fo = 120 Hz Istby = 7.5 mA Istby = 2 mA 10 Hz 100 kHz, Istby = 1 mA 2 5 6 0.9 1.2 0.9 100 20 70 0.26 0.38 15 65 65 -30 -55 60/50 0.50/0.60 0.60/0.70 12/12 60/60 60/60 -15/-15 -35/-35 2.0/4.0 1.5/4.0 5.00 4.85/4.75 5.15/5.25 25/25 50/50 50/50 Vmin Vmax mVmax mVmax mVmax mAmax mAmax µV mV/1000 hr dBmin Vmax Vmax mAmin Vmin Vmin Vmin Conditions Typical Limit (Note 4) Units
Vmin
3
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