L4960 SYC | Alldatasheet
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Technical content
PIN CONNECTION (Top view) N ° NAME FUNCTION 1 SUPPLY VOLTAGE Unregulated voltage input. An internal regulator powers the internal logic. 2 FEEDBACK INPUT The feedback terminal of the regulation loop. The output is connected directly to this terminal for 5.1V operation; it is connected via a divider for higher voltages.
3 FREQUENCY
A series RC network connected between this terminal and ground determines the regulation loop gain characteristics. 4 GROUND Common ground terminal.
5 OSCILLATOR A parallel RC network connected to this terminal determines the
switching frequency. 6 SOFT START Soft start time constant. A capacitor is connected between this terminal and ground to define the soft start time constant. This capacitor also determines the average short circuit output current. 7 OUTPUT Regulator output. PIN FUNCTIONS Symbol Parameter Value Unit V1 Input voltage 50 V V1 - V7 Input to output voltage difference 50 V V7 Negative output DC voltage -1 V Negative output peak voltage at t = 0.1µs; f = 100KHz -5 V V3, V6 Voltage at pin 3 and 6 5.5 V V2 Voltage at pin 2 7V I3 Pin 3 sink current 1 mA I5 Pin 5 source current 20 mA Ptot Power dissipation at Tcase ≤ 90°C1 5 W Tj, Tstg Junction and storage temperature -40 to 150 °C ABSOLUTE MAXIMUM RATINGS L4960
Symbol Parameter Test Conditions Min. Typ. Max. Unit DC CHARACTERISTICS I1Q Quiescent drain current 100% duty cycle pins 5 and 7 open Vi = 46V 30 40 mA 0% duty cycle 15 20 mA -I7L Output leakage current 0% duty cycle 1 mA SOFT START I6SO Source current 100 140 180 µA I6SI Sink current 50 70 120 µA ERROR AMPLIFIER V3H High level output voltage V2 = 4.7V I 3 = 100µA 3.5 V V3L Low level output voltage V2 = 5.3V I 3 = 100µA 0 . 5 V I3SI Sink output current V 2 = 5.3V 100 150 µA -I3SO Source output current V 2 = 4.7V 100 150 µA I2 Input bias current V 2 = 5.2V 2 10 µA G v DC open loop gain V 3 = 1V to 3V 46 55 dB OSCILLATOR -I5 Oscillator source current 5 mA ELECTRICAL CHARACTERISTICS (continued) L4960
DIM. mm inch A 4.8 0.189 C 1.37 0.054 D 2.4 2.8 0.094 0.110 D1 1.2 1.35 0.047 0.053 E 0.35 0.55 0.014 0.022 E1 0.7 0.97 0.028 0.038 F 0.6 0.8 0.024 0.031 F1 0.9 0.035 H2 10.4 0.409 H3 10.05 10.4 0.396 0.409 L1 14.92 0.587 L4 1.29 0.051 L9 0.2 0.008 V4 40˚ (typ.) Dia 3.65 3.85 0.144 0.152 A L C D E M Dia. F1H2 F GG 1 G 2 F E VV HEPTAMEC OUTLINE AND MECHANICAL DATA L4960