L5050S STMICROELECTRONICS | Alldatasheet

Document overview

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  • PDF pages: 20

Technical content

Datasheet sections

  • 1 Block diagram and pins descripti on
  • 2 Electrical specifications
  • 2.1 Absolute maximum ratings
  • 2.2 Electrical characteristics
  • 2.3 Electrical characteristics curves
  • 3 Protection features
  • 3.1 Voltage regulator
  • 3.2 Enable
  • 4 Package and PCB thermal data
  • 5 Package information
  • 5.1 ECOPACK
  • 5.2 SO-8 package information
  • 5.3 SO-8 packing information
  • 6 Revision history

Features

 AEC-Q100 qualified  Operating DC supply voltage range 5.6 V to  40 V  Low dropout voltage  Low quiescent current consumption  Precision output voltage 5 V ±2%  Enable input for enabling/disabling the voltage regulator  Thermal shutdown and short circuit protection  Wide temperature range (Tj = -40°C to 150°C)

Description

The L5050S is a 5 V low dropout linear voltage regulator suitable for automotive applications, available in a SO-8 package. The LDO delivers up to 50 mA of load current, and consumes as low as 5 µA of quiescent current with device disabled. High output voltage accuracy (±2%) is kept over wide temperature range, line and load variation. Enable feature allows output enabling or disabling. The maximum input voltage is 40 The regulator output current is internally limited and the device is protected against short circuit, overload and over temperature conditions. In addition, only low value ceramic capacitor on output is required for stability. L5050S Max DC supply voltage V S 40 V Max output voltage tolerance ∆Vo +/-2% Max dropout voltage V dp 500 mV Output current I o 50 mA Quiescent current Iqn 5 µA (1) 1. Typical value valid with En=LOW. Table 1. Device summary

1 Block diagram and pins description

Figure 1. Functional block diagram – L5050S Figure 2. Pins configuration Table 2. Pins description GND 2 Ground reference for regulator. VS 6 Supply voltage, block directly to GND on the IC with a capacitor. En 7 Enable pin: high signal to switch the regulator on.

2 Electrical specifications

2.1 Absolute maximum ratings

program and other relevant quality documents.

2.2 Electrical characteristics

Table 3. Absolute maximum ratings Table 4. Thermal data

  1. PCB: double layer; FR4 area = 77 mm x 86 mm; PCB thicknes s = 1.6 mm; Cu thickness = 70 µm (front and back side).

Table 5. General

  1. Measured output current when the output voltage has dropped 200 mV from its nominal value obtained at Vs=10.5 V and
  2. Thermal protection is guaranteed by design and characterization.

Table 5. General (continued) Table 6. Enable

2.3 Electrical char acteristics curves

Figure 3. Output voltage vs. Tj Figure 4. Output voltage vs. Vs Figure 5. Output voltage vs. VEn Figure 6. Drop voltage vs. output current Figure 7. Current consumption vs. output Figure 8. Current consumption vs. output

3 Protection features

3.1 Voltage regulator

protection to GND and a thermal shutdown are provided. Figure 18. Application schematic – L5050S Stability region is reported in Figure 19. Figure 19. Stability region

Figure 20. Maximum load variation response

3.2 Enable

4 Package and PCB thermal data

Figure 21. SO-8 PC board vias of 0.025 mm in PCB with a dissipation area of 2cm2 (picture on the right). Figure 22. Rthj-amb vs PCB copper area in open box free air condition

Table 7. SO-8 thermal parameter (continued)

5 Package information

5.1 ECOPACK

specifications, grade definitions and product status are available at: www.st.com.

5.2 SO-8 package information

Figure 25. SO-8 package outline Table 8. SO-8 package mechanical data

  1. Dimension D does not include mold fl ash, protrusions or gate burrs. Mold flash, protrusions or gate burrs

shall not exceed 0.15 mm in total (both side).

  1. Dimension “E1” does not include interlead flash or pr otrusions. Interlead flash or protrusions shall not

Table 8. SO-8 package mechanical data (continued)

5.3 SO-8 packing information

Figure 26. SO-8 tape and reel shipment (suffix “TR”)

6 Revision history

Table 9. Revision history 18-Dec-2018 1 Initial release. Updated Description in cover page. Updated Table 1: Device summary. Updated Section 3.1: Voltage regulator. 15-Apr-2019 3 Deleted fi gure SO-8 tube shipment (no suffix).