SLVSC60A September 2014 – January 2017 TPS54561-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 Pulse-Skipping Eco-mode Control Scheme
- 7.3.4 Low-Dropout Operation and Bootstrap Voltage (BOOT)
- 7.3.5 Error Amplifier
- 7.3.6 Adjusting the Output Voltage
- 7.3.7 Enable and Adjust Undervoltage Lockout
- 7.3.8 Soft-Start and Tracking Pin (SS/TR)
- 7.3.9 Sequencing
- 7.3.10 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
- 7.3.11 Accurate Current-Limit Operation and Maximum Switching Frequency
- 7.3.12 Synchronization to RT/CLK Pin
- 7.3.13 Power Good (PWRGD Pin)
- 7.3.14 Overvoltage Protection
- 7.3.15 Thermal Shutdown
- 7.3.16 Small-Signal Model for Loop Response
- 7.3.17 Simplified Small-Signal Model for Peak-Current-Mode Control
- 7.3.18 Small-Signal Model for Frequency Compensation
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Custom Design with WEBENCH® Tools
- 8.2.2.2 Selecting the Switching Frequency
- 8.2.2.3 Output Inductor Selection (L(O))
- 8.2.2.4 Output Capacitor
- 8.2.2.5 Catch Diode
- 8.2.2.6 Input Capacitor
- 8.2.2.7 Soft-Start Capacitor
- 8.2.2.8 Bootstrap Capacitor Selection
- 8.2.2.9 Undervoltage Lockout Set Point
- 8.2.2.10 Output Voltage and Feedback Resistor Selection
- 8.2.2.11 Compensation
- 8.2.2.12 Discontinuous Conduction Mode and Eco-mode Boundary
- 8.2.2.13 Power Dissipation Estimate
- 8.2.3 Safe Operating Area
- 8.2.4 Application Curves
- 8.2.5 Inverting Power Supply
- 8.2.6 Split-Rail Power Supply
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
- DPR|10
Thermal pad, mechanical data (Package|Pins)
- DPR|10
Orderable Information
1 Features
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
- Device HBM ESD Classification H1C
- Device CDM ESD Classification C5
- High Efficiency at Light Loads With Pulse-Skipping Eco-mode™ Control
- 87-mΩ High-Side MOSFET
- 152-µA Operating Quiescent Current and
2-µA Shutdown Current - 100-kHz to 2.5-MHz Switching Frequency
- Synchronizes to External Clock
- Low-Dropout Operation at Light Loads With Integrated BOOT Recharge FET
- Adjustable UVLO Voltage and Hysteresis
- Power-Good Output Monitor for Undervoltage and Overvoltage
- Adjustable Soft-Start and Sequencing
- 0.8-V 1% Internal Voltage Reference
- 10-Pin WSON With Thermal Pad Package
- –40°C to 150°C TJ Operating Range
- Create a Custom Design using the TPS54561-Q1 with the WEBENCH® Power Designer
2 Applications
3 Description
The TPS54561-Q1 device is a 60-V, 5-A, step-down regulator with an integrated high-side MOSFET. The device survives load dump pulses up to 65 V per ISO7637. Current-mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode and 152-µA supply current enables high efficiency at light loads. Pulling the enable pin low reduces shutdown supply current to 2 µA .
Undervoltage lockout has an internal 4.3-V setting. Use of an external resistor divider at the EN pin can increase the setting. The soft-start pin controls the output-voltage start-up ramp and also configures sequencing or tracking. An open-drain power-good signal indicates the output is within 93% to 106% of its nominal voltage.
A wide adjustable switching-frequency range allows optimization for either efficiency or external component size. Cycle-by-cycle current limit, frequency foldback, and thermal shutdown protect the device during an overload condition.
The TPS54561-Q1 is available in a 10-pin, 4-mm × 4-mm WSON package.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS54561-Q1 | WSON (10) | 4.00 mm × 4.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Space
Simplified Schematic
Efficiency vs Load Current
