SNVSAA7A December   2015  – May 2016 LM53625-Q1 , LM53635-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Typical Application Circuit
      2.      Typical Automotive Layout (22 mm x 12.5 mm)
  4. Revision History
  5. Device Comparison
  6. Pin Configuration and Functions
    1.     Pin 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 System Characteristics
    7. 7.7 Timing Characteristics
    8. 7.8 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
      1. 8.2.1 Control Scheme
    3. 8.3 Feature Description
      1. 8.3.1 RESET Flag Output
      2. 8.3.2 Enable and Start-Up
      3. 8.3.3 Soft-Start Function
      4. 8.3.4 Current Limit
      5. 8.3.5 Hiccup Mode
      6. 8.3.6 Synchronizing Input
      7. 8.3.7 Undervoltage Lockout (UVLO) and Thermal Shutdown (TSD)
      8. 8.3.8 Input Supply Current
    4. 8.4 Device Functional Modes
      1. 8.4.1 AUTO Mode
      2. 8.4.2 FPWM Mode
      3. 8.4.3 Dropout
      4. 8.4.4 Input Voltage Frequency Foldback
    5. 8.5 Spread-Spectrum Operation
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 General Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 External Components Selection
            1. 9.2.1.2.1.1 Input Capacitors
              1. 9.2.1.2.1.1.1 Input Capacitor Selection
            2. 9.2.1.2.1.2 Output Inductors and Capacitors Selection
              1. 9.2.1.2.1.2.1 Inductor Selection
              2. 9.2.1.2.1.2.2 Output Capacitor Selection
          2. 9.2.1.2.2 Setting the Output Voltage
            1. 9.2.1.2.2.1 FB for Adjustable Versions
          3. 9.2.1.2.3 VCC
          4. 9.2.1.2.4 BIAS
          5. 9.2.1.2.5 CBOOT
          6. 9.2.1.2.6 Maximum Ambient Temperature
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Fixed 5-V Output for USB-Type Applications
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Fixed 3.3-V Output
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
        3. 9.2.3.3 Application Curves
      4. 9.2.4 Adjustable Output
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
        3. 9.2.4.3 Application Curves
    3. 9.3 Do's and Don't's
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, 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)
  • RNL|22
散热焊盘机械数据 (封装 | 引脚)
订购信息

Electrical Characteristics

Limits apply over the recommended operating junction temperature range of –40°C to +150°C, unless otherwise noted. 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 = 13.5 V.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VFB Initial output voltage accuracy VIN = 3.8 V to 36 V, TJ = 25°C –1% 1%
VIN = 3.8 V to 36 V –1.5% 1.5%
IQ Operating quiescent current; measured at VIN pin when enabled and not switching(1) VIN = 13.5 V, VBIAS = 5 V 6 µA
VIN = 13.5 V, VBIAS = 5 V, TJ = 85°C 16
IB Bias current into BIAS pin, enabled, not switching VIN = 13.5 V, VBIAS = 5 V, FPWM = 0 V 35 µA
VIN = 13.5 V, VBIAS = 3.3 V, FPWM = 0 V 35
ISD Shutdown quiescent current; measured at VIN pin EN ≤ 0.4 V, TJ = 25°C 2 µA
EN ≤ 0.4 V, TJ = 85°C 3
EN ≤ 0.4V, TJ = 150°C 5
VIN-OPERATE Minimum input voltage to operate Rising 3.2 3.55 3.95 V
Falling 2.95 3.25 3.55
Hysteresis 0.28 0.3 0.4
VRESET RESET upper threshold voltage Rising, % of VOUT 105% 107% 110%
RESET lower threshold voltage Falling, % VOUT 92% 94% 96.5%
Magnitude of RESET lower threshold from steady state output voltage Steady-state output voltage and RESET threshold read at the same TJ and VIN 96%
VRESET_HYST RESET hysteresis as a percent of output voltage setpoint ±1
VRESET_VALID Minimum input voltage for proper RESET function 50-µA pullup to RESET pin, EN = 0 V, TJ= 25°C 1.5 V
VOL Low level RESET function output voltage 50-µA pullup to RESET pin, VIN =1.5 V, EN = 0 V 0.4 V
0.5-mA pullup to RESET pin, VIN =13.5 V, EN=0 V 0.4
1-mA pullup to RESET pin, VIN =13.5 V, EN=3.3 V 0.4
FSW Switching frequency VIN = 13.5 V, center frequency with spread spectrum, PWM operation 1.85 2.1 2.35 MHz
VIN = 13.5 V, without spread spectrum, PWM operation 1.85 2.1 2.35
FSYNC Sync frequency range 1.9 2.1 2.3 MHz
DSYNC Sync input duty cycle range High state input < 5.5 V and > 2.3 V 25% 75%
VFPWM FPWM input threshold voltage FPWM input high (MODE = FPWM) 1.5 V
FPWM input low (MODE = AUTO with diode emulation) 0.4
FPWM input hysteresis 0.15 1
FSSS Frequency span of spread spectrum operation ±3%
FPSS Spread-spectrum pattern frequency(2) 9 Hz
FSW-SS Switching Frequency while in spread spectrum VIN = 13.5 V, PWM operation 1.81 MHz
IFPWM FPWM leakage current VIN = 13.5 V, VFPWM = 3.3 V 1 µA
VIN = VFPWM = 13.5 V 5
ISYNC SYNC leakage current VIN = 13.5 V, VSYNC = 3.3 V 1 µA
VIN = VSYNC = 13.5 V 5
IL-HS High-side switch current limit LM53625 3.5 5 6.5 A
LM53635 4.5 6 7.5
IL-LS Low-side switch current limit LM53625 2.5 3.5 4.1 A
LM53635 3.5 4.5 5.1
IL-ZC Zero-cross current limit FPWM = low –0.02 A
IL-NEG Negative current limit FPWM = high –1.5
RDSON Power switch on-resistance High-side MOSFET RDSON, VIN = 13 V, IL=1A 60 130
Low-side MOSFET RDSON, VIN = 13 V, IL=1A 40 80
VEN Enable input threshold voltage - rising Enable rising 1.7 2 V
VEN_HYST Enable threshold hysteresis 0.45 0.55 V
VEN_WAKE Enable wake-up threshold 0.4 V
IEN EN pin input current VIN = VEN = 13.5 V 2 5 µA
VCC Internal VCC voltage VIN 13.5 V, VBIAS = 0 V 3.05 V
VIN = 13.5 V, VBIAS = 3.3 V 3.15
VCC_UVLO Internal VCC input undervoltage lockout VIN rising 2.7 V
Hysteresis below VCC-UVLO 185 mV
IFB Input current from FB to AGND Adjustable LM53625/35-Q1, FB=1 V 20 nA
VREF Reference voltage for adjustable option only TJ = 25°C 0.993 1 1.007 V
TJ = –40°C to 125°C 0.99 1 1.01
TJ = –40°C to 150°C 0.985 1 1.015
RRESET RDSON of RESEToutput Pull FB pin low. Sink 1-mA at RESET pin 50 85 Ω
VSYNC VIH 1.5 V
VIL 0.4
VHYST 0.15 1
TSD Thermal shutdown thresholds(2) Rising 155 175 °C
Hysteresis 15
DMAX Maximum switch duty cycle Fsw = 2.1 MHz 80%
While in dropout(2) 98%
This is the current used by the device while not switching, open loop on the ATE. It does not represent the total input current from the regulator system.
Ensured by Design, Not tested at production.