JAJSHB7B May   2019  – November 2020 LMR34215-Q1

PRODUCTION DATA  

  1. 特長
  2. アプリケーション
  3. 概要
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 System Characteristics
    8. 7.8 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-Good Flag Output
      2. 8.3.2 Enable and Start-up
      3. 8.3.3 Current Limit and Short Circuit
      4. 8.3.4 Undervoltage Lockout and Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Auto Mode
      2. 8.4.2 Forced PWM Operation
      3. 8.4.3 Dropout
      4. 8.4.4 Minimum Switch On-Time
      5. 8.4.5 Spread Spectrum Operation
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Ground and Thermal Considerations
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ(パッケージ|ピン)
サーマルパッド・メカニカル・データ
発注情報

Electrical Characteristics

Limits apply over operating junction temperature (TJ ) range of –40°C to +150°C, unless otherwise stated. Minimum and Maximum limits(1) are specified 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 = 12V.
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
SUPPLY VOLTAGE (VIN PIN)
IQ-nonSWOperating quiescent current (non-switching)(2)VEN = 3.3 V (PFM variant only)142435µA
ISDShutdown quiescent current; measured at VIN pinVEN = 0 V3.3µA
ENABLE (EN PIN)
VEN-VCC-HEnable input high level for VCC outputVENABLE rising; Internal LDO turns ON1.14V
VEN-VCC-LEnable input low level for VCC outputVENABLE falling; Internal LDO turns OFF0.3V
VEN-VOUT-HEnable input high level for VOUTVENABLE rising; Switching ON1.1571.2311.3V
VEN-VOUT-HYSEnable input hysteresis for VOUTHysteresis below VEN-VOUT-H; Switching OFF45110175mV
ILKG-ENEnable input leakage currentVEN = 3.3V0.250nA
INTERNAL LDO (VCC PIN)
VCCInternal VCC voltage6 V ≤ VIN ≤ 42 V4.7555.25V
VCC-UVLO-RisingInternal VCC undervoltage lockoutVCC rising3.63.84.0V
VCC-UVLO-FallingInternal VCC undervoltage lockoutVCC falling3.13.33.5V
VOLTAGE REFERENCE (FB PIN)
V5v0-Fixed5 V Fixed Output voltage Fixed output voltage option4.955.1V
VFBFeedback voltageAdjustable output voltage option0.98511.015V
ILKG-5v0-FixedFeedback leakage current; 5v0 FixedVOUT = 5 V (Fixed output voltage option only)2.52.9µA
ILKG-FBFeedback leakage currentFB = 1 V (Adjustable output voltage option only)0.2125nA
CURRENT LIMITS AND HICCUP
ISCHigh-side current limit(3)22.42.8A
ILS-LIMITLow-side current limit(3)1.551.82.07A
IL-ZCZero cross detector thresholdPFM variants only0.02A
IPEAK-MINMinimum inductor peak current(3)0.45A
IL-NEGNegative current limit(3)FPWM variant only–1.8–1.4–0.9A
POWER GOOD (PGOOD PIN)
VPG-HIGH-UPPower-Good upper threshold - rising% of FB voltage105%107%110%
VPG-LOW-DNPower-Good lower threshold - falling% of FB voltage90%93%95%
VPG-HYSPower-Good hysteresis (rising & falling)% of FB voltage2%
TPGPower-Good rising/falling edge deglitch delay80140200µs
VPG-VALIDMinimum input voltage for proper Power-Good function2V
RPGPower-Good on-resistanceVEN = 2.5 V80165Ω
RPGPower-Good on-resistanceVEN = 0 V3590Ω
OSCILLATOR
FOSCInternal oscillator frequency2.1-MHz variant1.952.12.35MHz
FOSCInternal oscillator frequency400-kHz variant340400460kHz
MOSFETS
RDS-ON-HSHigh-side MOSFET ON-resistanceIOUT = 0.5 A225435
RDS-ON-LSLow-side MOSFET ON-resistanceIOUT = 0.5 A150280
MIN and MAX limits are 100% production tested at 25℃. Limits over the operating temperature range verified through correlation using
Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
This is the current used by the device open loop. It does not represent the total input current of the system when in regulation.
The current limit values in this table are tested, open loop, in production. They may differ from those found in a closed loop application.