SLVS631C December   2005  – May 2015 TPS51117

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 Recommended Operating Conditions
    3. 6.3 Electrical Characteristics
    4. 6.4 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  PWM Frequency and Adaptive On-Time Control
      2. 7.3.2  Low-Side Driver
      3. 7.3.3  High-Side Driver
      4. 7.3.4  Soft-Start
      5. 7.3.5  Powergood
      6. 7.3.6  Output Discharge Control (Soft-Stop)
      7. 7.3.7  Overcurrent Limit
      8. 7.3.8  Negative Overcurrent Limit (PWM-Only Mode)
      9. 7.3.9  Overvoltage Protection
      10. 7.3.10 Undervoltage Protection
      11. 7.3.11 Start-Up Sequence
      12. 7.3.12 UVLO Protection
      13. 7.3.13 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 PWM Operation
      2. 7.4.2 Light-Load Condition With Auto-Skip Function
  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 D-CAP Mode Operation
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • RGY|14
  • PW|14
散热焊盘机械数据 (封装 | 引脚)
订购信息

5 Pin Configuration and Functions

RGY Package
14-Pin VQFN
Bottom View
TPS51117 po_rgy_lvs631.gif
PW Package
14-Pin TSSOP
Top View
TPS51117 po_lvs631.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
DRVH 13 O High-side NFET gate driver output. Source 5 Ω, sink 1.5-Ω LL-node referenced driver. Drive voltage corresponds to VBST to LL voltage.
DRVL 9 O Rectifying (low-side) NFET gate driver output. Source 5 Ω, sink 1.5-Ω PGND referenced driver. Drive voltage is V5DRV voltage.
EN_PSV 1 I Enable / power save pin. Connect to ground to disable SMPS. Connect to 3.3 V or 5 V to turn on SMPS and activate skip mode. Float to turn on SMPS but disable skip mode (forced continuous conduction mode).
GND 7 I Signal ground pin.
LL 12 I/O High-side NFET gate driver return. Also serves as anode of overcurrent comparator.
PGND 8 I/O Ground return for rectifying NFET gate driver. Also cathode of overcurrent protection and source node of the output discharge switch.
PGOOD 6 O Powergood window comparator, open-drain, output. Pull up to 5-V rail with a pullup resistor. Current capability is 7.5 mA.
TON 2 I On-time / frequency adjustment pin. Connect to LL with 100-kΩ to 600-kΩ resistor.
TRIP 11 I Overcurrent trip point set input. Connect resistor from this pin to signal ground to set threshold for both overcurrent and negative overcurrent limit.
VBST 14 I Supply input for high-side NFET gate driver (boost terminal). Connect capacitor from this pin to LL-node. An internal PN diode is connected between V5DRV to this pin. Designer can add external Schottky diode if forward drop is critical to drive the power NFET.
VFB 5 I SMPS voltage feedback input. Connect the resistor divider here for adjustable output.
VOUT 3 I Connect to SMPS output. This terminal serves two functions: output voltage monitor for on-time adjustment, and input for the output discharge switch.
V5DRV 10 I 5-V Power supply input for FET gate drivers. Internally connected to VBST by a PN diode. Connect 1 μF or more between this pin and PGND to support instantaneous current for gate drivers.
V5FILT 4 I 5-V Power supply input for all the control circuitry except gate drivers. Supply 5-V ramp rate should be 17 mV/μs or less and Tj < 85°C to secure safe start-up of the internal reference circuit. Apply RC filter consists of 300 Ω + 1 μF or 100 Ω + 4.7 μF at the pin input.