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  • 日期: 2014-06-13
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标签: 78L12_[www ic5 cn]


78L12 D 3-Terminal Regulators D Output Current up to 100 mA D No External Components D Internal Thermal-Overload Protection D Internal Short-Circuit Current Limiting D Direct Replacements for Fairchild µA78L12 Series description This series of fixed-voltage integrated-circuit voltage regulators is designed for a wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power-pass elements to make high-current voltage regulators. One of these regulators can deliver up to 100 mA of output current. The internal limiting and thermal-shutdown features of these regulators make them essentially immune to overload. When used as a replacement for a zener diode-resistor combination, an effective improvement in output impedance can be obtained, together with lower bias current. Positive-Voltage Regulators OC I TO-92 78L12ACZ INPUT COMMON OUTPUT OUTPUT GND INPUT SOT-89 78L12CPK electrical characteristics at specified virtual junction temperature, VI = 19V, I o =40mA (unless otherwise noted) PARAMETER TEST CONDITIONS Output voltage Input voltage regulation Ripple rejection Output voltage regulation Output noise voltage Dropout voltage V 207VV to 20 V I I O=1mA to 40MA, VI=14V to 27V IO = 1 mA to 70 mA VI = 14.5V tO 27V VI = 16V tO 27V VI =15V to 25V, f = 120 Hz IO = 1 mA to 100 mA IO = 1 mA to 40 mA f = 10 Hz to 100 kHz BBiiaass ccuurrrreennt t Bias current change VI = 16V to 27V IO = 1 mA to 40 mA TJ‡ 25°C Full range Full range 2255°CC 25°C 25°C MIN 11.5 11.4 11.4 37 25°C 25°C 25°C 125°C FFuulll range 78L12 TYP 12 12 12 55 49 42 22 13 70 1.7 4.3 MAX 12.5 12.6 12.6 250 200 100 50 UNIT V mmVV dB mmVV µV V 6 5.5 mmAA 1.5 0.1 mmAA ‡ Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.33-µF capacitor across the input and a 0.1-µF capacitor across the output. Full range for the 78L05 is T J = 0°C to 70°C Wing Shing Computer Components Co., (H.K.)Ltd. Homepage: Tel:(852)2341 9276 Fax:(852)2797 8153 E-mail: 2-1 WS 78L12 absolute maximum ratings over operating temperature range (unless othewise noted) Input voltage, VI 78L12 Virtual junction temperature range, TJ Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds Storage temperature range, Tstg PARAMETER UNIT 35 V 150 °C 260 °C –65 to 150 °C recommended operating conditions 78L12 MIN MAX UNIT Input voltage, VI 8 20 V Output current, IO 100 mA Operating virtual junction temperature, TJ 0 70 °C Pad Location 78L12 3 2 90um 90um 85um 90um 99 1 95um 100um Chip size 1.0 x 1.2 mm Pad N 1 2 3 Pad Name Ground Input Output X (um) 95 820 535 Y (um) 100 1010 1015 2-2




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