L4962A SGS-Thomson-Microelectronics, L4962A Datasheet
L4962A
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L4962A Summary of contents
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OUTPUT CURRENT 5.1V TO 40V OUTPUT VOLTAGE RANGE PRECISE ( 2%) ON-CHIP REFERENCE HIGH SWITCHING FREQUENCY VERY HIGH EFFICIENCY (UP TO 90%) VERY FEW EXTERNAL COMPONENTS SOFT START INTERNAL LIMITING CURRENT THERMAL SHUTDOWN DESCRIPTION The L4962 is a monolithic ...
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L4962 ABSOLUTE MAXIMUM RATINGS Symbol V Input voltage Input to output voltage difference Negative output DC voltage 2 Output peak voltage 0 100KHz Voltage ...
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PIN FUNCTIONS (cont’d) HEPTAWATT POWERDIP NAME 12, 13 GROUND 5 14 OSCILLATOR 6 15 SOFT START 7 2 OUTPUT ELECTRICAL CHARACTERISTICS (Refer to the test circuit, T specified) Symbol Parameter DYNAMIC ...
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L4962 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter DYNAMIC CHARACTERISTICS (cont’d) f Switching frequency f Voltage stability of switching frequency Temperature stability of switching frequency Maximum operating max switching frequency T Thermal shutdown sd junction temperature ...
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CIRCUIT OPERATION (refer to the block diagram) The L4962 is a monolithicstepdownswitching regu- lator providing outputvoltagesfrom 5.1V to 40V and delivering 1.5A. The regulation loop consists of a sawtooth oscilla- tor, error amplifier, comparator and the output stage. An errorsignal ...
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L4962 Figure 3. Test and application circuit (Powerdip BYW98 or 3A Schottky diode, 45V of VRRM CORE TYPE - MAGNETICS 58120 - A2 MPP 1 N TURNS 45, WIRE GAUGE: 0.8mm (20 AWG) ...
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Figure 7. Quiescent drain current vs. junction te m- perature (100% duty cycle) Figure 10. Open loop fre- quency and phase re- sponse of error amplifier F igure 13. Sw itching fr e- quency vs. R2 (see test circuit) Figure ...
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L4962 Figure 16. Supply voltage ripple rejection vs. frequency 19. Effi ci enc output current 22. E ffi c ien output voltage 8/16 Figure 17. Dropout voltage ...
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APPLICATION INFORMATION Figure 25. Typical application circuit EKR (ROE BYW98 OR VISK340 (SCHOTTKY) 1 SUGGESTED INDUCTORS MAGNETICS 58120 - A2MPP - 45 TURNS - WIRE GAUGE ...
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L4962 APPLICATION INFORMATION (continued) Figure 27 minimal 5.1V fixed regulator; Very few component are required * COGEMA 946043 (TOROID CORE) 969051 (U15 CORE) ** EKR (ROE) Figure 28. Programmable power supply V = 5.1V to 15V o I ...
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APPLICATION INFORMATION (continued) Figure 29. DC-DC converter 5.1V/4A, 12V/1A. A suggestion how to synchronize a negative output L1 COGEMA 946043 (969051 COGEMA 946044 (946045) Figure 30. In multiple supplies several L4962s can be synchronized as shown ...
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L4962 MOUNTING INSTRUCTION The Rth-j-amb of the L4962 can be reduced by soldering the GND pins to a suitable copper area of the printed circuit board (Fig. 32). The diagram of figure 33 shows the R function of the side ...
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DIM. MIN. TYP. MAX. MIN. TYP. a1 0.51 0.020 B 0.85 1.40 0.033 b 0.50 0.020 b1 0.38 0.50 0.015 D 20.0 E 8.80 0.346 e 2.54 0.100 e3 17.78 0.700 F 7.10 I 5.10 L 3.30 0.130 ...
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L4962 mm DIM. MIN. TYP. MAX. MIN. 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 ...
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DIM. MIN. TYP. MAX. MIN. TYP. 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 F 0.6 0.8 0.024 F1 0.9 G 2.41 2.54 2.67 0.095 0.100 G1 4.91 5.08 5.21 ...
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L4962 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 ...