SNVSA24 October   2014 LMR16006

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Fixed Frequency PWM Control
      2. 8.3.2 Bootstrap Voltage (CB)
      3. 8.3.3 Output Voltage Setting
      4. 8.3.4 Enable SHDN and VIN Undervoltage Lockout
      5. 8.3.5 Current Limit
      6. 8.3.6 Overvoltage Transient Protection
      7. 8.3.7 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Continuous Conduction Mode
      2. 8.4.2 ECO Mode
  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 Custom Design with WEBENCH Tools
        2. 9.2.2.2 Output Inductor Selection
        3. 9.2.2.3 Output Capacitor Selection
        4. 9.2.2.4 Schottky Diode Selection
        5. 9.2.2.5 Input Capacitor Selection
        6. 9.2.2.6 Bootstrap Capacitor Selection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Custom Design with WEBENCH Tools
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Related Documentation
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings (1)

MIN MAX UNIT
Input Voltages VIN to GND -0.3 65 V
SHDN to GND -0.3 65
FB to GND -0.3 7
CB to SW -0.3 7
Output Voltages SW to GND -0.3 65
SW to GND less than 30 ns transients -2 65
TJ Operation Junction temperature -40 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

7.2 Handling Ratings

MIN MAX UNIT
Tstg Storage temperature range -55 165 °C
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) 2000 V
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) 500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

7.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted) (1)
MIN MAX UNIT
Buck Regulator VIN 4 60 V
CB 4 66
CB to SW -0.3 6
SW -0.3 60
FB 0 5.5
Control SHDN 0 60
Temperature Operating junction temperature range, TJ -40 125 °C

7.4 Thermal Information

over operating free-air temperature range (unless otherwise noted)
THERMAL METRIC (1) SOT
(6 PINS)		 UNIT
RθJA Junction-to-ambient thermal resistance 102 °C/W
RθJCtop Junction-to-case (top) thermal resistance 36.9
RθJB Junction-to board characterization parameter 28.4
(1) All numbers apply for packages soldered directly onto a 3" x 3" PC board with 2 oz. copper on 4 layers in still air in accordance to JEDEC standards. Thermal resistance varies greatly with layout, copper thickness, number of layers in PCB, power distribution, numberof thermal vias, board size, ambient temperature, and air flow.

7.5 Electrical Characteristics

Limits apply over the recommended operating junction temperature (TJ) range of -40°C to +125°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 specified, the following conditions apply: VIN = SHDN = 12V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN (Input Power Supply)
VIN Operating input voltage 4 60 V
ISHDN Shutdown supply current VEN = 0 V 1 3 µA
IQ Operating quiescent current (non-switching) no load, VIN = 12 V 28 µA
UVLO Undervoltage lockout thresholds Rising threshold 4 V
Falling threshold 3
SHDN
VSHDN_Thre Rising SHDN Threshold Voltage 1.05 1.25 1.38 V
ISHDN Input current SHDN = 2.3 V -4.2 µA
SHDN = 0.9 V -1
ISHDN_HYS Hysteresis current -3 µA
HIGH-SIDE MOSFET
RDS_ON On-resistance VIN = 12 V, CB to SW = 5.8 V 900 mΩ
VOLTAGE REFERENCE (FB PIN)
VFB Feedback voltage 0.747 0.765 0.782 V
CURRENT LIMIT
ILIMIT Peak Current limit VIN = 12 V, TJ = 25°C 1200 mA
1700
THERMAL PERFORMANCE
TSHDN (1) Thermal shutdown threshold 170 ºC
THYS (1) Hysteresis 10 ºC
(1) Ensured by design

7.6 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SW (SW PIN)
fSW Switching frequency LMR16006X 595 700 805 kHz
LMR16006Y 1785 2100 2415
TON_MIN (1) Minimum turn-on time fSW = 2.1 MHz 80 ns
DMAX Maximum duty cycle LMR16006X 96%
LMR16006Y 97%
(1) Ensured by design.

7.7 Typical Characteristics

Unless otherwise specified the following conditions apply: VIN = 12 V, fSW = 700 kHz, L1 = 22 µH, Cout = 10 µF, TA = 25°C.
LMR16006 D001_SNVSA24.gif
VOUT = 12 V fSW = 700 kHz
Figure 1. Efficiency vs. Load Current
LMR16006 D003_SNVSA24.gif
VIN = 12 V fSW = 2.1 MHz
Figure 3. Efficiency vs. Load Current
LMR16006 D005_SNVSA24.gif
VOUT = 5 V
Figure 5. Shut-Down Current and Quiescent Current
LMR16006 D008_SNVSA24.gif
VOUT = 5 V IOUT = 600 mA
Figure 7. Line Regulation
LMR16006 D002_SNVSA24.gif
VOUT = 5 V fSW = 700 kHz
Figure 2. Efficiency vs. Load Current
LMR16006 D004_SNVSA24.gif
VIN = 12 V VOUT = 5V
Figure 4. Load Regulation
LMR16006 D006_SNVSA24.gif
Figure 6. UVLO Threshold
LMR16006 D009_SNVSA24.gif
VOUT=5 V
Figure 8. Dropout Curve