SLVSBM7A March   2013  – January 2016 TPS54061-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Fixed Frequency PWM Control
      2. 7.3.2  Slope Compensation Output Current
      3. 7.3.3  Error Amplifier
      4. 7.3.4  Voltage Reference
      5. 7.3.5  Adjusting the Output Voltage
      6. 7.3.6  Enable and Adjusting Undervoltage Lockout (UVLO)
      7. 7.3.7  Internal Slow-Start
      8. 7.3.8  Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
      9. 7.3.9  Selecting the Switching Frequency
      10. 7.3.10 Synchronization to RT/CLK Pin
      11. 7.3.11 Overvoltage Protection
      12. 7.3.12 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation Near Minimum Input Voltage
      2. 7.4.2 Operation With Enable Control
  8. Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Continuous Conduction Mode Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Selecting the Switching Frequency
          2. 8.2.1.2.2 Output Inductor Selection (LO)
          3. 8.2.1.2.3 Output Capacitor
          4. 8.2.1.2.4 Input Capacitor
          5. 8.2.1.2.5 Bootstrap Capacitor Selection
          6. 8.2.1.2.6 Undervoltage Lockout Set Point
          7. 8.2.1.2.7 Output Voltage and Feedback Resistors Selection
          8. 8.2.1.2.8 Closing the Loop
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Discontinuous Conduction Mode Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Closing the Feedback Loop
        3. 8.2.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    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
Voltage VIN –0.3 62 V
EN(2) –0.3 8 V
BOOT-PH 8 V
BOOT 70 V
VSENSE –0.3 6 V
COMP –0.3 3 V
PH –0.6 62 V
PH, 10-ns transient –2 62 V
RT/CLK –0.3 6 V
Current VIN Internally limited A
BOOT 100 mA
PH Internally limited A
Operating junction temperature –40 150 ºC
Storage temperature, Tstg –65 150 ºC
(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 QSS 009-105 (JESD22-A114A) and AEC-Q100 Classification Level H2(1) ±2000 V
Charged-device model (CDM), per QSS 009-147 (JESD22-C101B.01) and AEC-Q100 500V Classification Level C3B(2) ±750
(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 MAX UNIT
Input voltage, VIN 4.7 60 V
Output current 200 mA
Switching frequency set by RT/CLK resistor 50 1100 kHz
Switching frequency synchronized to external clock 300 1100 kHz

6.4 Thermal Information

THERMAL METRIC(1) TPS54061-Q1 UNIT
DRB (SON)
8 PINS
RθJA Junction-to-ambient thermal resistance 42.9 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 46.0 °C/W
RθJB Junction-to-board thermal resistance 18.1 °C/W
ψJT Junction-to-top characterization parameter 0.5 °C/W
ψJB Junction-to-board characterization parameter 18.3 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 3.0 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics

TJ = –40°C to 150°C, VIN = 4.7 to 60 V (unless otherwise noted)(1)
PARAMETER CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage 4.7 60 V
Shutdown supply current EN = 0 V 1.4 µA
IQ operating; non-switching VSENSE = 0.9 V, VIN = 12 V 90 110 µA
ENABLE AND UVLO (EN PIN)
Enable threshold Rising 1.23 1.4 V
Falling 1 1.18 V
Input current Enable threshold 50 mV –4.7 µA
Enable threshold –50 mV –1.2 µA
Hysteresis –3.5 µA
Enable high to start switching time 450 µs
VIN
VIN start voltage VIN rising 4.5 V
VOLTAGE REFERENCE
Voltage reference TJ = 25°C, VIN = 12 V 0.792 0.8 0.808 V
1 mA < IOUT < Minimum current limit 0.784 0.8 0.816
HIGH-SIDE MOSFET
Switch resistance BOOT-PH = 5.7 V 1.5 3 Ω
LOW-SIDE MOSFET
Switch resistance VIN = 12 V 0.8 1.5 Ω
ERROR AMPLIFIER
Input current VSENSE pin 20 nA
Error-amplifier gm –2 µA < I(COMP) < 2 µA, V(COMP) = 1 V 108 µMhos
EA gm during slow-start –2 µA < I(COMP) < 2 µA, V(COMP) = 1 V, VSENSE = 0.4 V 27 µMhos
Error amplifier DC gain VSENSE = 0.8 V 1000 V/V
Minimum unity-gain bandwidth 0.5 MHz
Error amplifier source and sink V(COMP) = 1 V, 100-mV overdrive ±8 µA
Start-switching threshold 0.57 V
COMP to Iswitch gm 1 A/V
CURRENT LIMIT
High-side sourcing current-limit threshold BOOT-PH = 5.7 V 250 350 500 mA
Zero-cross detect current –1.1 mA
THERMAL SHUTDOWN
Thermal shutdown 176 C
RT/CLK
Operating frequency using RT mode 50 1100 kHz
Switching frequency R(RT/CLK) = 120 kΩ 425 472 520 kHz
Minimum CLK pulse duration 40 ns
RT/CLK voltage R(RT/CLK) = 120 kΩ 0.53 V
RT/CLK high threshold 1.8 V
RT/CLK low threshold 0.5 V
RT/CLK falling-edge to PH rising-edge delay Measure at 500 kHz with RT resistor 67 ns
PLL lock-in time Measure at 500 kHz 100 µs
PLL frequency range 300 1100 kHz
PH
Minimum ON-time Measured at 50% to 50%, IOUT = 200 mA 120 ns
Dead time VIN = 12 V, IOUT = 200 mA, one transition 30 ns
BOOT
BOOT-to-PH regulation voltage VIN = 12 V 6 V
BOOT-PH UVLO 2.9 V
INTERNAL SLOW-START TIME
Slow-start time fSW = 472 kHz, RT = 120 kΩ, 10% to 90% 2.36 ms
(1) The electrical ratings specified in this section apply to all specifications in this document unless otherwise noted. These specifications are interpreted as conditions that do not degrade the parametric or functional specifications of the device for the life of the product containing it.

6.6 Typical Characteristics

TPS54061-Q1 01_HS_res_tj_lvsbm7.gif
VIN = 12 V
Figure 1. High-Side rDS(on) vs Temperature
TPS54061-Q1 03_vref_tj_lvsbm7.gif
Figure 3. VREF Voltage vs Temperature
TPS54061-Q1 05_ofreq_jtemp_lvsbm7.gif
VIN = 12 V RT = 120 kΩ
Figure 5. Frequency vs Temperature
TPS54061-Q1 07_trans_jtemp_lvsbm7.gif
VIN = 12 V
Figure 7. Error Amplifier Transconductance vs Temperature
TPS54061-Q1 09_hyst_jtemp_lvsbm7.gif
VIN = 12 V
Figure 9. Enable-Pin Hysteresis Current
vs Temperature
TPS54061-Q1 11_EN_pullup_vinput_lvsbm7.gif
VIN = 12 V TJ = 25°C
Figure 11. Enable-Pin Pullup Current vs Input Voltage
TPS54061-Q1 13_sply_vin_lvsbm7.gif
EN = Open VSENSE = 0.83 V
Figure 13. Supply Current (VIN Pin) vs Input Voltage
TPS54061-Q1 15_vin_EN_lvsbm7.gif
EN = Open
Figure 15. Supply Current (VIN Pin) vs
Input Voltage (0 V to VSTART), EN Pin Open
TPS54061-Q1 17_currlmt_vin_lvsbm7.gif
Figure 17. Current Limit vs Input Voltage
TPS54061-Q1 02_LS_res_tj_lvsbm7.gif
VIN = 12 V
Figure 2. Low-Side rDS(on) vs Temperature
TPS54061-Q1 04_sw_vsense_lvsbm7.gif
VIN = 12 V RT = 120 kΩ TJ = 25°C
Figure 4. Frequency vs VSENSE Voltage
TPS54061-Q1 06_freq_clk_res_lvsbm7.gif
VIN = 12 V TJ = 25°C
Figure 6. Frequency vs RT/CLK Resistance
TPS54061-Q1 08_vEN_jtemp_lvsbm7.gif
VIN = 12 V
Figure 8. Enable-Pin Voltage vs Temperature
TPS54061-Q1 10_vinput_jtemp_lvsbm7.gif
Figure 10. Input Voltage (UVLO) vs Temperature
TPS54061-Q1 12_shutdn_vin_lvsbm7.gif
EN = 0 V
Figure 12. Shutdown Supply Current (VIN Pin)
vs Input Voltage
TPS54061-Q1 14_sply_lvsbm7.gif
EN = 0 V
Figure 14. Supply Current (VIN Pin)
vs Input Voltage (0 V to VSTART), EN Pin Low
TPS54061-Q1 16_sstime_jtemp_lvsbm7.gif
VIN = 12 V fsw = 472 kHz
Figure 16. Slow-Start Time vs Temperature