L4960 STMicroelectronics, L4960 Datasheet
L4960
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L4960 Summary of contents
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... BLOCK DIAGRAM June 2000 2.5A POWER SWITCHING REGULATOR ORDERING NUMBERS: L4960 (Vertical) The L4960 is mounted in a Heptawatt plastic power package and requires very few external compo- nents. Efficient operation at switching frequencies up to 150KHz allows a reduction in the size and cost of external filter components ...
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... L4960 PIN CONNECTION (Top view) ABSOLUTE MAXIMUM RATINGS Symbol V Input voltage Input to output voltage difference Negative output DC voltage 7 Negative output peak voltage 0 100KHz Voltage at pin 3 and Voltage at pin Pin 3 sink current 3 I Pin 5 source current 5 P Power dissipation at T tot Junction and storage temperature ...
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... ref 12V rms = 100Hz fripple ref 46V 125 ref o Value max 4 max 35V, unless otherwise i Min. Typ. Max ref 5.1 5.2 0.4 1.4 3 2 100 115 0.5 1 120 150 150 L4960 Unit C/W C/W Unit mV KHz % % KHz C 3/16 ...
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... L4960 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter DC CHARACTERISTICS I Quiescent drain current 1Q -I Output leakage current 7L SOFT START I Source current 6SO I Sink current 6SI ERROR AMPLIFIER V High level output voltage 3H V Low level output voltage 3L I Sink output current 3SI -I Source output current ...
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... CIRCUIT OPERATION (refer to the block diagram) The L4960 is a monolithic stepdown switching regu- lator providing output voltages from 5.1V to 40V and delivering 2.5A. The regulation loop consists of a sawtooth oscilla- tor, error amplifier, comparator and the output stage. An error signal is produced by comparing the output voltage with a precise 5 ...
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... L4960 Figure 3. Test and application circuit C6, C7: EKR (ROE 150 (COGEMA 946042) CORE TYPE: MAGNETICS 58206-A2 MPP Figure 4. Quiescent drain current vs. supply voltage (0% duty cycle) 6/16 N TURNS 45, WIRE GAUGE: 0.8mm (20 AWG) Figure 5. Quiescent drain current vs. supply voltage (100% duty cycle) Figure 6. Quiescent drain current vs ...
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... Figure 13. Switching fre- quency vs. R2 (see test circuit) Figure 8. Reference voltage (pin 2) vs Figure 11. Switching fre- quency vs. input voltage Figure 14. Line transient response L4960 Figure 9. Reference voltage versus junction temperature (pin 2) Figure 12. Switching fre- quency vs. junction tem- perature Figure 15. Load transient response ...
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... L4960 Figure 16. Supply voltage ripple rejection vs. frequency Figure 19. Power dissipation derating curve F igu re 22. Effi ciency vs. output current 8/16 Figure 17. Dropout voltage between pin 1 and pin 7 vs. current at pin 7 Fi gure 20. Effici ency vs. output current Fi gure 2 3. Effi ciency vs. output voltage Figure 18 ...
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... N TURNS: 45, WIRE GAUGE: 0.8mm (20 AWG), COGEMA 946042 U15/GUP15: N TURNS: 60, WIRE GAUGE: 0.8mm (20 AWG), AIR GAP: 1mm, Figure 25. P.C. board and component layout of the Fig scale) COGEMA 969051. Resistor values for standard output voltages 12V 4.7K 6.2K 15V 4.7K 9.1K 18V 4.7K 12K 24V 4.7K 18K L4960 9/16 ...
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... L4960 APPLICATION INFORMATION Figure 26. A minimal 5.1V fixed regulator; Very few component are required * COGEMA 946042 (TOROID CORE) 969051 (U15 CORE) ** EKR (ROE) Figure 27. Programmable power supply V = 5.1V to 15V 2.5A max o Load regulation (1A to 2A) = 10mV (V 10/16 = 5.1V) o ...
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... APPLICATION INFORMATION (continued) Figure 28. Microcomputer supply with + 5.1V, -5V, +12V and -12V outputs L4960 11/16 ...
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... L4960 APPLICATION INFORMATION (continued) Figure 29. DC-DC converter 5.1V/4A, 12V/2.5A; a suggestion how to synchronize a negative output L1 COGEMA 946042 (969051 COGEMA 946044 (946045 BYW80 Figure 30 multiple supplies several L4960s can be synchronized as shown 12/16 ...
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... Thanks to the Heptawatt package attaching the hetsink is very simple, a screw or a compression spring (clip) being sufficient. Between the heatsink Figure 32. Mounting example and the package it is better to insert a layer of silicon grease, to optimize the thermal contact, no electri- cal isolation is needed between the two surfaces. L4960 13/16 ...
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... L4960 mm DIM. MIN. TYP. MAX. A 4.8 C 1.37 D 2.4 2.8 0.094 D1 1.2 1.35 0.047 E 0.35 0.55 0.014 E1 0.7 0.97 0.028 F 0.6 0.8 0.024 F1 0.9 G 2.34 2.54 2.74 0.095 G1 4.88 5.08 5.28 0.193 G2 7.42 7.62 7.82 0.295 H2 10.4 H3 10.05 10.4 0.396 L 16.7 16.9 17 ...
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... L9 4.44 Dia 3.65 3.85 0.144 inch TYP. MAX. MECHANICAL DATA 0.189 0.054 0.110 0.053 0.022 0.031 0.035 0.100 0.105 0.200 0.205 0.300 0.307 0.409 0.409 0.559 0.173 0.622 0.201 0.118 0.622 0.260 0.175 0.152 L4960 OUTLINE AND Heptawatt H 15/16 ...
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... L4960 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...