SPAS093C December   2009  – September 2015 TPS2505

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics (Shared Boost, LDO and USB)
    6. 6.6  Electrical Characteristics (Boost Only)
    7. 6.7  Electrical Characteristics (USB1/2 Only)
    8. 6.8  Electrical Characteristics (LDO and Reset Only)
    9. 6.9  Recommended External Components
    10. 6.10 Dissipation Ratings
    11. 6.11 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  PGND
      2. 8.3.2  IN
      3. 8.3.3  EN
      4. 8.3.4  GND
      5. 8.3.5  ILIM1/2
      6. 8.3.6  RESET
      7. 8.3.7  LDOOUT
      8. 8.3.8  LDOIN
      9. 8.3.9  ENLDO
      10. 8.3.10 FAULT1/2
      11. 8.3.11 ENUSB1/2
      12. 8.3.12 USB1/2
      13. 8.3.13 AUX
      14. 8.3.14 SW
      15. 8.3.15 Thermal Pad
      16. 8.3.16 Boost Converter
        1. 8.3.16.1 Start-Up
        2. 8.3.16.2 Normal Operation
        3. 8.3.16.3 Low-Frequency Mode
        4. 8.3.16.4 No-Frequency Mode
        5. 8.3.16.5 Pulsed Frequency Mode (PFM) Light-Load Operation
        6. 8.3.16.6 Overvoltage Protection
        7. 8.3.16.7 Overload Conditions
        8. 8.3.16.8 Determining the Maximum Allowable AUX and USB1/2 Current
      17. 8.3.17 USB Switches
        1. 8.3.17.1 Overview
        2. 8.3.17.2 Overcurrent Conditions
        3. 8.3.17.3 FAULT1/2 Response
        4. 8.3.17.4 Undervoltage Lockout
        5. 8.3.17.5 Programming the Current-Limit Threshold Resistor RILIM
      18. 8.3.18 3.3-V LDO
      19. 8.3.19 Reset Comparator
      20. 8.3.20 Thermal Shutdown
      21. 8.3.21 Component Recommendations
        1. 8.3.21.1 Boost Inductor
        2. 8.3.21.2 IN Capacitance
        3. 8.3.21.3 AUX Capacitance
        4. 8.3.21.4 USB Capacitance
        5. 8.3.21.5 ILIM1/2 and FAULT1/2 Resistors
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Step-by-Step Design Procedure
        2. 9.2.2.2 Switching Frequency
        3. 9.2.2.3 AUX Voltage
        4. 9.2.2.4 Determine Maximum Total Current (IAUX + ILDO + IUSB1 + IUSB2 )
        5. 9.2.2.5 Power Inductor
        6. 9.2.2.6 Output AUX Capacitor Selection
        7. 9.2.2.7 Output USB1/2 Capacitor Selection
        8. 9.2.2.8 Input Capacitor Selection
          1. 9.2.2.8.1 Current-Limit Threshold Resistor RILIM
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

RGW Package
20-Pin VQFN With Exposed Thermal Pad
Top View
TPS2505 po_pas093.gif

Pin Functions

PIN TYPE(1) DESCRIPTION
NAME NO.
AUX 18 O Fixed 5.1-V boost converter output. Connect a low-ESR ceramic capacitor from AUX to PGND.
EN 3 I Enable input for boost converter. Tie to IN to enable.
ENLDO 12 I Enable input for the LDO. Tie to AUX to enable.
ENUSB1 8 I Enable input for the USB1 switch. Tie to IN or AUX to enable.
ENUSB2 14 I Enable input for the USB2 switch. Tie to IN or AUX to enable.
FAULT1 7 O Active low USB1 fault indicator (open drain).
FAULT2 13 O Active low USB2 fault indicator (open drain).
GND 4 P Control / logic ground. Must be tied to PGND close to the IC externally.
ILIM1 5 I Program the nominal USB1 switch current-limit threshold with a resistor to GND.
ILIM2 6 I Program the nominal USB2 switch current-limit threshold with a resistor to GND.
IN 2 I Input supply voltage for boost converter.
LDOIN 11 I Input supply voltage for LDO. Connect to AUX.
LDOOUT 10 O Fixed 3.3-V LDO output. Connect a low-ESR ceramic capacitor from LDOOUT to GND.
PGND 1 P Source connection for the internal low-side boost converter power switch. Connect to GND with a low impedance connection to the input and output capacitors.
RESET 9 O Active low LDO output good indicator (open drain).
SW 19 P Boost and rectifying switch input. This node is switched between PGND and AUX. Connect the boost inductor from IN to SW.
SW 20 P Boost and rectifying switch input. This node is switched between PGND and AUX. Connect the boost inductor from IN to SW.
USB1 16 O Output of the USB1 power switch. Connect to the USB1 port.
USB1 17 O Output of the USB1 power switch. Connect to the USB1 port.
USB2 15 O Output of the USB2 power switch. Connect to the USB2 port.
Thermal Pad — — Internally connected to PGND. Must be soldered to board ground for thermal dissipation.
(1) I = Input; O = Output; P = Power