JAJSIM1 February   2020 LM60430 , LM60440

ADVANCE INFORMATION for pre-production products; subject to change without notice.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      概略回路図
      2.      効率と出力電流との関係 VOUT = 5V、400kHz
  4. 4 改訂履歴
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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 Characteristics
    7. 7.7 System Characteristics
  8. 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 Dropout
      3. 8.4.3 Minimum Switch On-Time
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Choosing the Switching Frequency
        2. 9.2.2.2  Setting the Output Voltage
        3. 9.2.2.3  Inductor Selection
        4. 9.2.2.4  Output Capacitor Selection
        5. 9.2.2.5  Input Capacitor Selection
        6. 9.2.2.6  CBOOT
        7. 9.2.2.7  VCC
        8. 9.2.2.8  CFF Selection
        9. 9.2.2.9  External UVLO
        10. 9.2.2.10 Maximum Ambient Temperature
      3. 9.2.3 Application Curves
    3. 9.3 EMI
    4. 9.4 What to Do and What Not to Do
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Ground and Thermal Considerations
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 デバイス・サポート
      1. 12.1.1 開発サポート
        1. 12.1.1.1 WEBENCH®ツールによるカスタム設計
    2. 12.2 ドキュメントのサポート
      1. 12.2.1 関連資料
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 サポート・リソース
    5. 12.5 商標
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 Glossary
  13. 13メカニカル、パッケージ、および注文情報

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

7.5 Electrical Characteristics

Limits apply over the operating junction temperature (TJ) range of –40°C to +150°C, unless otherwise stated. Minimum and maximum limits 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  = 12 V, VEN = 4 V.     
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE
VIN Minimum operating input voltage 3.8 V
IQ Non-switching input current; measured at VIN pin (2) VFB = 1.2 V 24 34 µA
ISD Shutdown quiescent current; measured at VIN pin EN = 0 5 10 µA
ENABLE
VEN-VCC-H EN input level required to turn on internal LDO Rising threshold 1 V
VEN-VCC-L EN input level required to turn off internal LDO Falling threshold 0.3 V
VEN-H EN input level required to start switching Rising threshold 1.2 1.231 1.26 V
VEN-HYS Hysteresis below VEN-H Hysteresis below VEN-H; falling 100 mV
INTERNAL SUPPLIES
VCC Internal LDO output voltage appearing at the VCC pin 6 V ≤ VIN ≤ 36 V 4.75 5 5.25 V
VBOOT-UVLO Bootstrap voltage undervoltage lock-out threshold(3) 2.2 V
VOLTAGE REFERENCE (FB PIN)
VFB Feedback voltage; ADJ option 0.985 1 1.015 V
CURRENT LIMITS(4)
ISC High-side current limit LM60440 5.5 A
ISC High-side current limit LM60430 4.5 A
ILIMIT Low-side current limit LM60440 4.5 A
ILIMIT Low-side current limit LM60430 3.5 A
IPEAK-MIN Minimum peak inductor current LM60440 0.86 A
IPEAK-MIN Minimum peak inductor current LM60430 0.69 A
IZC Zero current detector threshold -0.106 A
SOFT START
tSS Internal soft-start time 2.9 4.4 6 ms
POWER GOOD (PG PIN)
VPG-HIGH-UP Power-good upper threshold - rising % of FB voltage 105% 107% 110%
VPG-HIGH-DN Power-good upper threshold - falling % of FB voltage 103% 105% 108%
VPG-LOW-UP Power-good lower threshold - rising % of FB voltage 92% 94% 97%
VPG-LOW-DN Power-good lower threshold - falling % of FB voltage 90% 92% 95%
tPG Power-good glitch filter delay(1) 60 170 µs
RPG Power-good flag RDSON VIN = 12 V, VEN = 4 V 76 150 Ω
VEN = 0 V 35 60
VIN-PG Minimum input voltage for proper PG function 50-µA, EN = 0 V 2 V
VPG PG logic low output 50-µA, EN = 0 V, VIN = 2V 0.2 V
OSCILLATOR
ƒSW Switching frequency 340 400 460 kHz
ƒSW Switching frequency "D" Version 0.85 1 1.15 MHz
MOSFETS
RDS-ON-HS High-side MOSFET ON-resistance 76 146 mΩ
RDS-ON-LS Low-side MOSFET ON-resistance 51 96 mΩ
(1) See Power-Good Flag Output for details.
(2) This is the current used by the device open loop. It does not represent the total input current of the system when in regulation.
(3) When the voltage across the CBOOT capacitor falls below this voltage, the low side MOSFET is turned on to recharge CBOOT.
(4) The current limit values in this table are tested, open loop, in production. They may differ from those found in a closed loop application.