SNVS307G September   2004  – April 2016 LM5010

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 Control Circuit Overview
      2. 7.3.2 Start-Up Regulator (VCC)
      3. 7.3.3 Regulation Comparator
      4. 7.3.4 Overvoltage Comparator
      5. 7.3.5 ON-Time Control
      6. 7.3.6 Current Limit
      7. 7.3.7 Soft Start
      8. 7.3.8 N-Channel Buck Switch and Driver
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown
  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 Component Selection
          1. 8.2.2.1.1  R1 and R2
          2. 8.2.2.1.2  RON, FS
          3. 8.2.2.1.3  L1
          4. 8.2.2.1.4  RCL
          5. 8.2.2.1.5  C2 and R3
          6. 8.2.2.1.6  D1
          7. 8.2.2.1.7  C1
          8. 8.2.2.1.8  C3
          9. 8.2.2.1.9  C4
          10. 8.2.2.1.10 C5
          11. 8.2.2.1.11 C6
        2. 8.2.2.2 Increasing The Current Limit Threshold
        3. 8.2.2.3 Ripple Configuration
      3. 8.2.3 Application Curves
    3. 8.3 Do's and Don'ts
  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 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 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

DPR Package
10-Pin WSON
Top View
PWP Package
14-Pin HTSSOP
Top View

Pin Functions

PIN I/O DESCRIPTION
NAME WSON HTSSOP
BST 2 3 I Boost pin for bootstrap capacitor: Connect a 0.022-µF capacitor from SW to this pin. The capacitor is charged from VCC through an internal diode during each OFF-time.
EP — — — Exposed pad
FB 6 9 I Feedback input from the regulated output: Internally connected to the regulation and overvoltage comparators. The regulation level is 2.5 V.
ISEN 3 4 I Current sense: The recirculating current flows through the internal sense resistor, and out of this pin to the free-wheeling diode. Current limit is nominally set at 1.25 A.
NC — 1, 7, 8, 14 — No connection
RON/SD 8 11 I ON-time control and shutdown: An external resistor from VIN to this pin sets the buck switch ON-time. Grounding this pin shuts down the regulator.
RTN 5 6 — Circuit ground: Ground for all internal circuitry other than the current limit detection.
SGND 4 5 — Sense ground: Recirculating current flows into this pin to the current sense resistor.
SS 7 10 I Soft start: An internal 11.5-µA current source charges an external capacitor to 2.5 V, providing the soft start function.
SW 1 2 O Switching node: Internally connected to the buck switch source. Connect to the inductor, free-wheeling diode, and bootstrap capacitor.
VCC 9 12 I Output from the startup regulator: Nominally regulates at 7 V. An external voltage (7.5 V to 14 V) can be applied to this pin to reduce internal dissipation. An internal diode connects VCC to VIN.
VIN 10 13 I Input supply: Nominal input range is 8 V to 75 V.