LDK120M33R STMICROELECTRONICS | Alldatasheet

Document overview

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  • PDF pages: 24

Technical content

Datasheet sections

  • 1 Diagram
  • 2 Pin configuration
  • 3 Typical application
  • 4 Maximum ratings
  • 5 Electrical characteristics
  • 6 Typical performance characteristics
  • 7 Package mechanical data
  • 8 Packaging mechanical data
  • 9 Order codes
  • 10 Revision history

Features

  • Input voltage from 1.9 to 5.5 V
  • Very low dropout voltage (100 mV typ. at 100 mA load)
  • Low quiescent current (max. 100 µA, 1 µA in OFF mode)
  • Very low noise
  • Output voltage tolerance: ± 2.0% @ 25 °C
  • 200 mA guaranteed output current
  • Wide range of fixed output voltages available on request: from 0.8 V to 3.5 V with 100 mV step
  • Adjustable version: from 0.8 V to V IN-Vdrop
  • Logic-controlled electronic shutdown
  • Compatible with ceramic capacitor COUT = 1 µF
  • Internal current and thermal limit
  • Available in SOT23-5L, SOT323-5L and DFN6 (1.2 x 1.3 mm) packages
  • Temperature range: -40 °C to 125 °C

Applications

  • Mobile phones
  • Personal digital assistants (PDAs)
  • Cordless phones and similar battery-powered systems
  • Digital still cameras

Description

The LDK120 low drop voltage regulator provides 200 mA of maximum current from an input supply voltage in the range of 1.9 V to 5.5 V, with a typical dropout voltage of 100 mV. It is stabilized with a ceramic capacitor on the output. The very low drop voltage, low quiescent current and low noise features make it suitable for low power battery-powered applications. An enable logic control function puts the LDK120 in shutdown mode allowing a total current consumption lower than 1 µA. The device also includes a short-circuit constant current limiting and thermal protection. 627/ 627/ ')1 [PP

1 Diagram

Figure 1. Block diagram

2 Pin configuration

Figure 2. Pin connection (top view) Table 1. Pin description (SOT23-5L, SOT323-5L)

  1. Bypass capacitor for noise reduction on fixed version is optional, if not used the relevant pin must be left

floating with no routing on the board.

3 Typical application

Figure 3. Typical application circuits for fixed version Figure 4. Typical application circuits for adjustable version

4 Maximum ratings

Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. All values are referred to GND. Table 2. Absolute maximum ratings Table 3. Thermal data

5 Electrical characteristics

Table 4. Electrical characteristics for LDK120

  1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value.

Table 5. Electrical characteristics for LDK120

  1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value.

6 Typical performance characteristics

CIN = COUT = 1 µF, VEN to VIN, unless otherwise specified. Figure 5. Output voltage vs. temp. for Figure 6. Output voltage vs. temp. for Figure 7. Output voltage vs. temp. for fixed Figure 8. Output voltage vs. temp. for fixed Figure 9. Line regulation vs. temp. for Figure 10. Short-circuit current vs. temp. for

7 Package mechanical data

specifications, grade definitions and product status are available at: www.st.com. Figure 35. SOT23-5L mechanical drawing

Figure 36. SOT23-5L footprint (dimensions in mm) Table 6. SOT23-5L mechanical data

Figure 37. DFN6L (1.2 x 1.3 mm) drawing

Figure 38. DFN6L footprint (dimensions in mm) Table 7. DFN6L (1.2 x 1.3 mm) mechanical data

Figure 39. SOT323-5L drawing

Table 8. SOT323-5L mechanical data

8 Packaging mechanical data

Figure 40. SOT23-5L and SOT323-xL tape and reel drawing

Table 9. SOT23-5L tape and reel mechanical data Table 10. SOT323-xL tape and reel mechanical data

9 Order codes

Table 11. Order codes Table 12. Marking

Table 13. Document revision history RPN LDK120xx changed to LDK120. Updated the Features and the Description in cover page. Cancelled Table1: Device summary. maximum ratings and Table 11: Order codes. Added Section 8: Packaging mechanical data. 10-Mar-2014 4 Updated Table 11: Order codes.