SLUS859C October 2008 – January 2015 TPS54233
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Simplified Schematic
- 5 Revision History
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2
Feature Description
- 8.2.1 Fixed Frequency PWM Control
- 8.2.2 Voltage Reference (Vref)
- 8.2.3 Bootstrap Voltage (BOOT)
- 8.2.4 Enable and Adjustable Input Under-Voltage Lockout (VIN UVLO)
- 8.2.5 Programmable Slow Start Using SS PIN
- 8.2.6 Error Amplifier
- 8.2.7 Slope Compensation
- 8.2.8 Current Mode Compensation Design
- 8.2.9 Overcurrent Protection and Frequency Shift
- 8.2.10 Overvoltage Transient Protection
- 8.2.11 Thermal Shutdown
- 8.3 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2 Detailed Design Procedure
- 9.2.3 Application Curves
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
1 Features
- 3.5 V to 28 V Input Voltage Range
- Adjustable Output Voltage Down to 0.8 V
- Integrated 80 mΩ High Side MOSFET Supports up to 2A Continuous Output Current
- High Efficiency at Light Loads with a Pulse Skipping Eco-mode™
- Fixed 300 kHz Switching Frequency
- Typical 1 μA Shutdown Quiescent Current
- Adjustable Slow Start Limits Inrush Currents
- Programmable UVLO Threshold
- Overvoltage Transient Protection
- Cycle by Cycle Current Limit, Frequency Fold Back and Thermal Shutdown Protection
- Available in Easy-to-Use SOIC8 Package
- Supported by WEBENCH® Software Tool (www.TI.com/WEBENCH)
2 Applications
- Consumer Applications such as Set-Top Boxes, CPE Equipment, LCD Displays, Peripherals, and Battery Chargers
- Industrial and Car Audio Power Supplies
- 5V, 12V and 24V Distributed Power Systems
3 Description
The TPS54233 is a 28 V, 2 A non-synchronous buck converter that integrates a low RDS(on) high side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode™ feature is automatically activated. Furthermore, the 1 μA shutdown supply current allows the device to be used in battery powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the Hysteresis of the input under-voltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle by cycle current limit scheme, frequency fold back and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54233 is available in an 8-pin SOIC package that has been internally optimized to improve thermal performance.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS54233 | SOIC (8) | 4.90 mm x 3.90 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
