SLVSDG0B March   2016  – December 2017 TPS564208

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Adaptive On-Time Control and PWM Operation
      2. 7.3.2 Soft Start and Pre-Biased Soft Start
      3. 7.3.3 Current Protection
      4. 7.3.4 Undervoltage Lockout (UVLO) Protection
      5. 7.3.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Standby Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Output Voltage Resistors Selection
        3. 8.2.2.3 Output Filter Selection
        4. 8.2.2.4 Input Capacitor Selection
        5. 8.2.2.5 Bootstrap Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Development Support
      1. 11.1.1 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Input voltage VIN, EN –0.3 19 V
VBST –0.3 25 V
VBST (10 ns transient) –0.3 27 V
VBST (vs SW) –0.3 6.5 V
VFB –0.3 6.5 V
SW –2 19 V
SW (10 ns transient) –3.5 21 V
Operating junction temperature, TJ –40 150 °C
Storage temperature, Tstg –55 150 °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.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±4000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1500
(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.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
VIN Supply input voltage range 4.5 17 V
VI Input voltage range VBST –0.1 23 V
VBST (10 ns transient) –0.1 26
VBST (vs SW) –0.1 6.0
EN –0.1 17
VFB –0.1 5.5
SW –1.8 17
SW (10 ns transient) –3.5 20
TJ Operating junction temperature –40 125 °C

6.4 Thermal Information

THERMAL METRIC(1) TPS564208 UNIT
DDC (SOT)
6 PINS
RθJA Junction-to-ambient thermal resistance 86.3 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 39.4 °C/W
RθJB Junction-to-board thermal resistance 13.3 °C/W
ψJT Junction-to-top characterization parameter 1.8 °C/W
ψJB Junction-to-board characterization parameter 13.3 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

TJ = –40°C to 125°C, VIN = 12 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
IVIN Operating – non-switching supply current VIN current, EN = 5 V, VFB = 1 V 640 820 µA
IVINSDN Shutdown supply current VIN current, EN = 0 V 0.9 5 µA
LOGIC THRESHOLD
VENH EN high-level input voltage EN 1.6 V
VENL EN low-level input voltage EN 0.8 V
REN EN pin resistance to GND VEN = 12 V 225 425 900 kΩ
VFB VOLTAGE AND DISCHARGE RESISTANCE
VFBTH VFB threshold voltage VO = 1.05 V, continuous mode operation 745 760 775 mV
IVFB VFB input current VFB = 0.8 V 0 ±0.1 µA
MOSFET
RDS(on)h High-side switch resistance TA = 25°C, VBST – SW = 5.5 V 50 mΩ
RDS(on)l Low-side switch resistance TA = 25°C 22 mΩ
CURRENT LIMIT
Iocl Current limit(1) DC current, VOUT = 1.05 V, L1 = 1.5 µH 4.2 6 7.7 A
THERMAL SHUTDOWN
TSDN Thermal shutdown threshold(1) Shutdown temperature 172 °C
Hysteresis 38
ON-TIME TIMER CONTROL
tOFF(MIN) Minimum off time VFB = 0.68 V 220 280 ns
SOFT START
tSS Soft-start time Internal soft-start time 1 ms
FREQUENCY
Fsw Switching frequency VIN = 12 V, VO = 1.05 V, FCCM mode 560 kHz
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VUVP Output UVP threshold Hiccup detect (H > L) 65%
THICCUP_WAIT Hiccup on time 1.9 ms
THICCUP_RE Hiccup time before restart 15.5 ms
UVLO
UVLO UVLO threshold Wake up VIN voltage 4 4.3 V
Shutdown VIN voltage 3.3 3.6
Hysteresis VIN voltage(1) 0.4
(1) Not production tested.

6.6 Typical Characteristics

VIN = 12 V (unless otherwise noted)
TPS564208 D001_SLVSDG0.gif
Figure 1. TPS564208 Supply Current vs Junction Temperature
TPS564208 D003_SLVSDG0.gif
Figure 3. EN Pin UVLO Low Voltage vs Junction Temperature
TPS564208 D005_SLVSDG0.gif
Figure 5. High-Side Rds-On vs Junction Temperature
TPS564208 D007_SLVSDG0.gif
IOUT = 1 A
Figure 7. TPS564208 Switching Frequency vs Input Voltage
TPS564208 D009_SLVSDG0.gif
Figure 9. TPS564208 VOUT = 1.05 V Efficiency, L = 2.2 µH
TPS564208 D011_SLVSDG0.gif
Figure 11. TPS564208 VOUT = 1.8 V Efficiency, L = 2.2 µH
TPS564208 D013_SLVSDG0.gif
Figure 13. TPS564208 VOUT = 5 V Efficiency, L = 3.3 µH
TPS564208 D002_SLVSDG0.gif
Figure 2. VFB Voltage vs Junction Temperature
TPS564208 D004_SLVSDG0.gif
Figure 4. TPS564208 EN Pin UVLO High Voltage vs Junction Temperature
TPS564208 D006_SLVSDG0.gif
Figure 6. Low-Side Rds-On vs Junction Temperature
TPS564208 D008_SLVSDG0.gif
VIN = 12 V
Figure 8. TPS564208 Switching Frequency vs Output Current
TPS564208 D010_SLVSDG0.gif
Figure 10. TPS564208 VOUT = 1.5 V Efficiency, L = 2.2 µH
TPS564208 D012_SLVSDG0.gif
Figure 12. TPS564208 VOUT = 3.3 V Efficiency, L = 2.2 µH