SLVSBJ1B September   2012  – January 2017 TPS65051-Q1

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 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Operation
      2. 7.3.2  DCDC1 Converter
      3. 7.3.3  DCDC2 Converter
      4. 7.3.4  Dynamic Voltage Positioning
      5. 7.3.5  Soft Start
      6. 7.3.6  100% Duty-Cycle Low-Dropout Operation
      7. 7.3.7  Undervoltage Lockout
      8. 7.3.8  Mode Selection
      9. 7.3.9  Enable
      10. 7.3.10 RESET
      11. 7.3.11 Short-Circuit Protection
      12. 7.3.12 Thermal Shutdown
      13. 7.3.13 Low Dropout Voltage Regulators
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-Save Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Output-Voltage Setting
          1. 8.2.2.1.1 Converter 1 (DCDC1)
          2. 8.2.2.1.2 Converter 2 (DCDC2)
        2. 8.2.2.2 Output Filter Design (Inductor and Output Capacitor)
          1. 8.2.2.2.1 Inductor Selection
          2. 8.2.2.2.2 Output-Capacitor Selection
          3. 8.2.2.2.3 Input-Capacitor Selection
        3. 8.2.2.3 Low-Dropout Voltage Regulators (LDOs)
        4. 8.2.2.4 RESET
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resource
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

5 Pin Configuration and Functions

RSM Package
32-Pin VQFN With Exposed Thermal Pad
Top View

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
AGND 2 I Analog GND, connect to PGND and thermal pad
BP 1 I Input for bypass capacitor for internal reference
DEFDCDC2 17 I Feedback pin for converter 2. Connect DEFDCDC2 to the center of the external resistor divider.
EN_DCDC1 25 I Enable input for converter 1, active-high
EN_DCDC2 26 I Enable input for converter 2, 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.
FB1 31 I Feedback input for the external voltage divider
FB2 6 I Feedback input for the external voltage divider
FB3 9 I Feedback input for the external voltage divider
FB4 13 I Feedback input for the external voltage divider
FB_DCDC1 24 I Input to adjust output voltage of converter 1 between 0.6 V and VI. Connect an external resistor divider between VOUT1, this pin, and GND.
HYSTERESIS 8 I Input for hysteresis on reset threshold
L1 22 O Switch pin of converter 1. Connected to inductor
L2 20 O Switch pin of converter 2. Connected to inductor
MODE 32 I Select between power-safe mode and forced-PWM mode for DCDC1 and DCDC2. In power-safe mode, the device uses PFM at light loads, PWM for higher loads. Setting this pin to high level selects forced-PWM mode. If this pin has low level, then the device operates in power-safe mode.
PGND1 23 I GND for converter 1
PGND2 19 I GND for converter 2
RESET 14 O Open-drain active-low reset output, 100-ms reset-delay time
THRESHOLD 7 I Reset input
VCC 3 I Power supply for digital and analog circuitry of DCDC1, DCDC2 and LDOs. Connect this pin to the same voltage supply as VINDCDC1/2.
VDCDC2 18 I Feedback voltage-sense input, connect directly to the output of converter 2.
VINDCDC1/2 21 I Input voltage for VDCDC1 and VDCDC2 step-down converters. Connect this pin 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
Thermal pad — Connect to GND