L4925 STMicroelectronics, L4925 Datasheet
L4925
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L4925 Summary of contents
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... Thermal shutdown and short circuit protections February 2010 Very low drop voltage regulator PowerSO-20 Description The L4925 is a monolithic integrated 5 V voltage regulator with a very low dropout output and additional functions such as power-on reset and programmable reset delay time designed for supplying microcomputer controlled systems especially in automotive applications ...
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... Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Reset circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 Supply voltage transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.2 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 Package Informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2/14 Doc ID 1770 Rev 7 L4925 ...
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... L4925 List of tables Table 2. Thermal data Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Doc ID 1770 Rev 7 List of tables 3/14 ...
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... PowerSO-20 pin connections (top view Figure 3. Foldback characteristics of V Figure 4. Output voltage vs input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 5. Quiescent current vs supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 6. Block circuit diagram Figure 7. Reset output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 8. Application circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 9. PowerSO-20 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4/ Doc ID 1770 Rev 7 L4925 ...
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... Thermal resistance junction to case (max) th(j-c) Vz VREF 5V 1.23V RESET Connected to pin 1-10-11-20 1 GND N. N.C. 5 N.C. 6 RES 7 N.C. 8 N.C. 9 GND 10 Parameter Doc ID 1770 Rev 7 Block and pin connections diagrams L4925 CT RES 2μ D95AT151 20 GND 19 N.C. N. OUT 16 V OUT 15 N. N.C. 12 N.C. 11 GND D95AT152 PowerSO- 3 Unit ° ...
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... Test condition 500 < 500 100 500 100 500 4 Foldback characteristic 0 500 mA O Doc ID 1770 Rev 7 L4925 Value Unit internally limited °C -55 to 150 °C -40 to 150 °C 165 Min. Typ. Max. Unit 4.90 5 5.10 V 5.50 V 0.2 0.3 V 0.3 0 550 1000 ...
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... L4925 Table 4. Electrical characteristics (continued) Symbol Parameter Reset V Reset threshold voltage RT V Reset threshold RTH t Reset pulse delay RD t Reset reaction time RR V Reset output low voltage RL Reset output high leakage I RH current V Delay comparator threshold CTth Delay comparator threshold V CTth hy ...
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... Functional description 3 Functional description The L4925 is a monolithic integrated voltage regulator, based on the STM modular voltage regulator approach. Several outstanding features and auxiliary functions are implemented to meet the requirements of supplying microprocessor systems in automotive applications. Nevertheless suitable also in other applications where the present functions are required ...
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... L4925 Figure 4. Output voltage vs input voltage Figure 5. Quiescent current vs supply voltage 3.2 Reset circuit The block circuit diagram of the reset circuit is shown in supervises the output voltage. The reset threshold of 4 defined with the internal reference voltage and standby output divider. The reset pulse delay time t the charge time of an external capacitor CT: ⋅ ...
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... Functional description Figure 6. Block circuit diagram Figure 7. Reset output waveforms 10/14 Doc ID 1770 Rev 7 L4925 ...
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... Figure 8. Application circuit diagram PREREGULATOR VBAT GND REG ≥ 1 µF; C For stability Recommended for application VREF 5V 1.23V Vz 2μ RESET ≥ 10 µF; ESR ≤ 2.5 Ω KHz µF to 100 µ Doc ID 1770 Rev 7 Application information Vo Vout Co L4925 CT RES RES = 2V D95AT153 11/14 ...
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... DETAIL BOTTOM VIEW PSO20MEC Doc ID 1770 Rev 7 OUTLINE AND MECHANICAL DATA JEDEC MO-166 PowerSO- DETAIL A lead slug a3 DETAIL B 0.35 Gage Plane - SEATING PLANE (COPLANARITY 0056635 I L4925 ...
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... L4925 6 Revision history Table 5. Document revision history Date 01-Oct-2003 18-Nov-2005 03-Feb-2006 09-Feb-2010 Revision 4 First issue in EDOCD DMS Added GND pins to fig Added order code and changed the formatting style in compliance with the new template Reset Threshold Voltage changed from 4.5V / 5.2V (min/max ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 14/14 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 1770 Rev 7 L4925 ...