SNVS686K March   2011  – May 2024 LMZ22005

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Synchronization Input
      2. 6.3.2 Output Overvoltage Protection
      3. 6.3.3 Current Limit
      4. 6.3.4 Thermal Protection
      5. 6.3.5 Prebiased Start-Up
    4. 6.4 Device Functional Modes
      1. 6.4.1 Discontinuous And Continuous Conduction Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Design Steps
        2. 7.2.2.2 Enable Divider, RENT, RENB and RENH Selection
        3. 7.2.2.3 Output Voltage Selection
        4. 7.2.2.4 Soft-start Capacitor Selection
        5. 7.2.2.5 Tracking Supply Divider Option
        6. 7.2.2.6 CO Selection
        7. 7.2.2.7 CIN Selection
        8. 7.2.2.8 Discontinuous And Continuous Conduction Modes Selection
      3. 7.2.3 Application Curves
  9. 8 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Examples
    3. 9.3 Power Dissipation and Thermal Considerations
    4. 9.4 Power Module SMT Guidelines
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

5.5 Electrical Characteristics

Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 12 V, VOUT = 3.3 V.
PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT
SYSTEM PARAMETERS
ENABLE CONTROL
VEN EN threshold trip point VEN rising, TJ = 25°C 1.279 V
VEN rising, TJ = –40°C to +125°C 1.1 1.458
VEN-HYS EN input hysteresis current VEN > 1.279 V 21 µA
SOFT-START
ISS SS source current VSS = 0 V, TJ = 25°C 50 µA
VSS = 0 V, TJ = –40°C to +125°C 40 60
tSS Internal soft-start interval 1.6 ms
CURRENT LIMIT
ICL Current limit threshold DC average, TJ = –40°C to +125°C 5.4 A
INTERNAL SWITCHING OSCILLATOR
fosc Free-running oscillator frequency Sync input connected to ground. 711 812 914 kHz
fsync Synchronization range 650 950 kHz
VIL-sync Synchronization logic zero amplitude Relative to AGND, TJ = –40°C to +125°C 0.4 V
VIH-sync Synchronization logic one amplitude Relative to AGND, TJ = –40°C to +125°C 1.5 V
Sync dc Synchronization duty cycle range 15% 50% 85%
Dmax Maximum Duty Factor 83%
REGULATION AND OVERVOLTAGE COMPARATOR
VFB In-regulation feedback voltage VSS >+ 0.8 V, IO = 3 A, TJ = 25°C 0.796 V
VSS >+ 0.8 V, IO = 3 A,
TJ = –40°C to +125°C		 0.776 0.816
VFB-OV Feedback overvoltage protection threshold 0.86 V
IFB Feedback input bias current 5 nA
IQ Non-switching input current VFB = 0.86 V 2.6 mA
ISD Shutdown quiescent current VEN = 0 V 70 μA
THERMAL CHARACTERISTICS
TSD Thermal shutdown Rising 165 °C
TSD-HYST Thermal shutdown hysteresis Falling 15 °C
PERFORMANCE PARAMETERS(3)
ΔVO Output voltage ripple Cout = 220 µF with 7 mΩ ESR + 100 µF
X7R + 2 x 0.047 µF BW at 20 MHz		 9 mVPP
ΔVO/ΔVIN Line regulation VIN = 12 V to 20 V, IO= 0.001 A ±0.02%
ΔVO/ΔIOUT Load regulation VIN = 12 V, IO= 0.001 A to 3 A 1 mV/A
η Peak efficiency VIN = 12 V, VO = 3.3 V, IO = 1 A 86%
η Full load efficiency VIN = 12 V VO = 3.3 V, IO = 3 A 81.5%
(1) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely parametric norm.
(3) Refer to BOM in Table 7-1.