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
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Fixed Frequency PWM Control
- 7.3.2 Slope Compensation Output Current
- 7.3.3 Error Amplifier
- 7.3.4 Voltage Reference
- 7.3.5 Adjusting the Output Voltage
- 7.3.6 Enable and Adjusting Undervoltage Lockout (UVLO)
- 7.3.7 Internal Slow-Start
- 7.3.8 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
- 7.3.9 Selecting the Switching Frequency
- 7.3.10 Synchronization to RT/CLK Pin
- 7.3.11 Overvoltage Protection
- 7.3.12 Thermal Shutdown
- 7.4 Device Functional Modes
-
8 Applications and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1
Continuous Conduction Mode Application
- 8.2.1.1 Design Requirements
- 8.2.1.2
Detailed Design Procedure
- 8.2.1.2.1 Selecting the Switching Frequency
- 8.2.1.2.2 Output Inductor Selection (LO)
- 8.2.1.2.3 Output Capacitor
- 8.2.1.2.4 Input Capacitor
- 8.2.1.2.5 Bootstrap Capacitor Selection
- 8.2.1.2.6 Undervoltage Lockout Set Point
- 8.2.1.2.7 Output Voltage and Feedback Resistors Selection
- 8.2.1.2.8 Closing the Loop
- 8.2.1.3 Application Curves
- 8.2.2 Discontinuous Conduction Mode Application
- 8.2.1
Continuous Conduction Mode Application
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
- DRB|8
Thermal pad, mechanical data (Package|Pins)
- DRB|8
Orderable Information
1 Features
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device HBM ESD Classification Level H2
- Device CDM ESD Classification Level C3B
- Integrated High-Side and Low-Side MOSFETs
- Diode Emulation for Light-Load Efficiency
- Peak-Current Mode Control
- 90-µA Operating Quiescent Current
- 1.4-µA Shutdown Supply Current
- 50-kHz to 1.1-MHz Adjustable Switching Frequency
- Synchronizes to External Clock
- 0.8 V ±1% Voltage Reference
- Stable With Ceramic Output Capacitors or Low-Cost Aluminum Electrolytic
- Cycle-by-Cycle Current Limit, Thermal, OVP, and Frequency Foldback Protection
- 3-mm x 3-mm, 8-Pin SON Package With Thermal Pad
- –40°C to 150°C Operating Junction Temperature
2 Applications
- Low-Power Standby or Bias Voltage Supplies
- High-Efficiency Replacement for High-Voltage Linear Regulators
3 Description
The TPS54061-Q1 device is a 60-V, 200-mA, synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs. Current-mode control provides simple external compensation and flexible component selection. The non-switching supply current is 90 µA. Using the enable pin reduces the shutdown supply current to 1.4 µA.
To increase light-load efficiency, the low-side MOSFET emulates a diode when the inductor current reaches zero.
The internal undervoltage lockout setting is 4.5 V, but using two resistors on the enable pin can increase the setting. The internal slow-start time controls the output-voltage start-up ramp.
The adjustable switching-frequency range allows optimization of efficiency and external component size. Frequency foldback and thermal shutdown protect the part during an overload condition.
The TPS54061-Q1 enables small designs by integrating the MOSFETs and boot recharge diode, and by minimizing the IC footprint with a small 3-mm × 3-mm thermally-enhanced SON package.
The TPS54061-Q1 is supported in the WEBENCH™ Designer at www.ti.com.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS54061-Q1 | SON (8) | 3.00 mm × 3.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic
Efficiency
