TPS54331-Q1中文资料德州仪器数据手册PDF规格书

1FEATURES

2• Qualified for Automotive Applications

• AEC-Q100 Test Guidance With the Following

Results:

– Device Temperature Grade1: –40°C to

+125°C Ambient Operating Temperature

Range

– Device HBM ESD Classification Level H2

– Device CDM ESD Classification Level C3B

• 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 2-A 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 the SOIC8 Package

• Supported by SwitcherPro™ Software Tool

(http://focus.ti.com/docs/toolsw/folders/print/s

witcherpro.html)

APPLICATIONS

• LCD Displays, Peripherals, and Battery

Chargers

• Car Audio Power Supplies

• 5V, 12V and 24V Distributed Power Systems

DESCRIPTION

The TPS54233-Q1 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-

Q1 is available in an 8-pin SOIC package that has

been internally optimized to improve thermal

performance.