ST755 ST Microelectronics, ST755 Datasheet
ST755
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ST755 Summary of contents
Page 1
... V = -5V and 0 in out 275mA (typical value logic controlled shut down pin that interfaces inverting directly with microprocessor reduces supply current to only 10 A. Input to Output differential voltage is limited to V supply current is 1.2mA. ST755 SO and -5V). ...
Page 2
... SHUT-DOWN Control (V = On, GND=Shutdown) CC Reference Output Voltage (1.25V) Soft Start Compensation Input Negative Output Voltage Ground Switch Output Positive Supply-Voltage Input DIP-8 SO-8 (Tube) ST755CD Value Unit - 725 mW 470 o - -55 to 150 C SO-8 (T&R) ST755CD-TR ...
Page 3
... The figure in the first page shown the detailed block diagram of the device. ST755 is realized in a BCD technology in order to achieve high temperature stability, the best REFERENCE precision , a very low quiescent current and jitter free operations. The final stage is built around a 0 ...
Page 4
... ST755 APPLICATION CIRCUIT To achieve the best performances from switching power supply topology, particular care to layout drawing is needed, in order to minimize EMI and obtain low noise, jitter free operation moreover, it ensures the full device functionality. Layout design proposed on demoboard (see picture 2) helps to lower the developing time. ...
Page 5
... TYPICAL OPERATING CHARACTERISTICS Figure 3: Load Current vs Supply Voltage Figure 5: Efficency vs Load Current Figure 7: Switch ON Resistance vs Supply Voltage Figure 4: Load Current vs Supply Voltage Figure 6: Peak InductorCurrent vs Load Current Figure 8: Oscillator Frequency vs Temperature & Supply Voltage ST755 5/9 ...
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... ST755 TYPICAL OPERATING CHARACTERISTICS (continued) Figure 9: Switch Current Limit vs Soft Start Voltage Figure 11: Soft Start Delay Time 6/9 Figure 10: Reference Voltage vs temperature ...
Page 7
... Plastic DIP-8 MECHANICAL DATA mm DIM. MIN. TYP. A 3.3 a1 0.7 B 1.39 B1 0.91 b 0 8.8 e 2.54 e3 7. 3.3 Z 0.44 inch MAX. MIN. TYP. 0.130 0.028 1.65 0.055 1.04 0.036 0.020 0.5 0.015 9.8 0.346 0.100 0.300 0.300 7.1 4.8 0.130 1.6 0.017 ST755 MAX. 0.065 0.041 0.020 0.386 0.280 0.189 0.063 P001F 7/9 ...
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... ST755 SO-8 MECHANICAL DATA DIM. MIN. TYP 0 0.65 b 0.35 b1 0. 4.8 E 5.8 e 1.27 e3 3.81 F 3 8/9 mm MAX. MIN. 1.75 0.25 0.003 1.65 0.85 0.025 0.48 0.013 0.25 0.007 0.5 0.010 45 (typ.) 5.0 0.188 6.2 0.228 4.0 0.14 1.27 0.015 0.6 8 (max.) inch TYP. MAX. 0.068 0.009 0.064 0.033 0.018 0.010 0.019 0.196 0.244 0.050 0.150 0.157 ...
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... The ST logo is a trademark of STMicroelectronics 1998 STMicroelectronics – Printed in Italy – All Rights Reserved Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. STMicroelectronics GROUP OF COMPANIES . ST755 9/9 ...