L4925_V01 STM | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 14
Technical content
Datasheet sections
- 1 Block and pin connections diagrams
- 1.1 Thermal data
- 2 Electrical specifications
- 2.1 Absolute maximum ratings
- 2.2 Electrical characteristics
- 3 Functional description
- 3.1 Voltage regulator
- 3.2 Reset circuit
- 4 Application information
- 4.1 Supply voltage transients
- 4.2 Application circuit
- 5 Package Informations
- 6 Revision history
Features
■ Operating DC supply voltage range 6 V to 28 V ■ Transient supply voltage up to 40 V ■ Extremely low quiescent current ■ High precision output voltage ■ Output current capability up to 500 mA ■ Very low dropout voltage less than 0.6 V ■ Reset circuit sensing the output voltage ■ Programmable reset pulse delay with external capacitor ■ Thermal shutdown and short circuit protections
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. It is designed for supplying microcomputer controlled systems especially in automotive applications. Table 1. Device summary
1 Block and pin connections diagrams
Figure 1. Block diagram Figure 2. PowerSO-20 pin connections (top view)
1.1 Thermal data
11 GND
Table 2. Thermal data
2 Electrical specifications
2.1 Absolute maximum ratings
transients must be clamped with external circuitry (see Application Circuit).
2.2 Electrical characteristics
VS =14 V; Tj = –40 to 125 °C unless otherwise specified. Table 3. Absolute maximum ratings Table 4. Electrical characteristics
Table 4. Electrical characteristics (continued)
3 Functional description
meet the requirements of supplying microprocessor systems in automotive applications.
3.1 Voltage regulator
element. With this structure very low dropout voltage at currents up to 500 mA is obtained. Figure 3. Foldback characteristics of V O this feature no functional interruption due to overvoltage pulses is generated. voltage is shown in Figure 4. in this region, the dropout voltage is controlled. The quiescent current as a function of the supply input voltage is shown in Figure 5.
Figure 4. Output voltage vs input voltage Figure 5. Quiescent current vs supply voltage
3.2 Reset circuit
bit longer than the reaction time results in a shorter reset delay time. approximately 50 ms. The typical reset output waveforms are shown in Figure 7.
4 Application information
4.1 Supply voltage transients
High supply voltage transients can cause a reset output signal disturbance. transients of more than 0.4 V/ms. can cause a reset signal disturbance.
4.2 Application circuit
Figure 8. Application circuit diagram
5 Package Informations
Figure 9. PowerSO-20 mechanical data and package dimensions (1) “D and E1” do not include mold flash or protusions.
- Critical dimensions: “E”, “G” and “a3”.
6 Revision history
Table 5. Document revision history Reformatted entire document. 20-Sep-2013 8 Updated disclaimer.