SLVS844A September   2008  – June 2015 TPS65055

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
    6. 6.6 Dissipation Ratings
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
      1. 8.1.1 DCDC1 Converter
      2. 8.1.2 DCDC2 Converter
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power Save Mode
        1. 8.3.1.1 Dynamic Voltage Positioning
        2. 8.3.1.2 Soft Start
        3. 8.3.1.3 100% Duty Cycle Low Dropout Operation
        4. 8.3.1.4 Undervoltage Lockout
      2. 8.3.2 Enable
      3. 8.3.3 Discharge
      4. 8.3.4 RST and DPD
      5. 8.3.5 Short-Circuit Protection
      6. 8.3.6 Thermal Shutdown
      7. 8.3.7 LDO1 to LDO4
        1. 8.3.7.1 Default Voltage Setting for LDOs and DCDC1
    4. 8.4 Device Functional Modes
    5. 8.5 Programming
      1. 8.5.1 Interface Specification
        1. 8.5.1.1 Serial Interface
    6. 8.6 Register Maps
  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 Output Voltage Setting
          1. 9.2.2.1.1 Converter 1 (DCDC1)
          2. 9.2.2.1.2 Converter 2 (DCDC2)
        2. 9.2.2.2 Output Filter Design (Inductor and Output Capacitor)
          1. 9.2.2.2.1 Inductor Selection
          2. 9.2.2.2.2 Output Capacitor Selection
          3. 9.2.2.2.3 Input Capacitor Selection
      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 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5 Pin Configuration and Functions

RSM Package
32-Pin VQFN
Top View
TPS65055 po_lvs844.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
AGND 2 I Analog GND, connect to PGND and PowerPAD
BP 1 I Input for bypass capacitor for internal reference
DEF_DCDC2 17 I Select pin of converter 2 output voltage. High = 1 V, low = 1.2 V
DEFLDO1 9 I Digital input, used to set the default output voltage of LDO1 to LDO4; LSB
DEFLDO2 6 I Digital input, used to set the default output voltage of LDO1 to LDO4; MSB
discharge 14 O Open-drain output driven by the signal at the threshold input
DPD 13 O Open-drain active low output; low after UVLO event
EN_DCDC1 25 I Enable input for converter1, active high
EN_DCDC2 26 I Enable input for converter2, active high
EN_LDO1 27 I Enable input for LDO1. Logic high enables the LDO, logic low disables the LDO.
EN_LDO2 28 I Enable input for LDO2. Logic high enables the LDO, logic low disables the LDO.
EN_LDO3 15 I Enable input for LDO3. Logic high enables the LDO, logic low disables the LDO.
EN_LDO4 16 I Enable input for LDO4. Logic high enables the LDO, logic low disables the LDO.
L1 22 O Switch pin of converter1. Connected to inductor
L2 20 O Switch pin of converter 2. Connected to inductor.
PGND1 23 I GND for converter 1
PGND2 19 I GND for converter 2
RST 8 O Open-drain active low output; low after UVLO event
SCLK 32 I Clock input for the I2C compatible interface.
SDAT 31 I/O Data line for the I2C compatible interface.
threshold 7 I Input to comparator driving the discharge output. If the input voltage at threshold is < 0.8 V, the discharge output is actively pulled low.
Vcc 3 I Power supply for digital and analog circuitry of DCDC1, DCDC2 and LDOs. This pin must be connected to the same voltage supply as VINDCDC1/2.
VDCDC1 24 I Feedback voltage sense input, connect directly to Vout1
VDCDC2 18 I Feedback voltage sense input, connect directly to Vout2
VINDCDC1/2 21 Input voltage for VDCDC1 and VDCDC2 step-down converter. This must be connected to the same voltage supply as VCC.
VINLDO1 29 I Input voltage for LDO1
VINLDO2 4 I Input voltage for LDO2
VINLDO3/4 11 I Input voltage for LDO3 and LDO4
VLDO1 30 O Output voltage of LDO1
VLDO2 5 O Output voltage of LDO2
VLDO3 10 O Output voltage of LDO3
VLDO4 12 O Output voltage of LDO4
PowerPAD™ – Connect to GND
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