TPS54541DPRR.B中文资料德州仪器数据手册PDF规格书

1 Features

1• High Efficiency at Light Loads with Pulse Skipping

Eco-mode™

• 87-mΩ High-Side MOSFET

• 152-μA Operating Quiescent Current and

2-μA Shutdown Current

• 100-kHz to 2.5-MHz Adjustable Switching

Frequency

• Synchronizes to External Clock

• Low Dropout at Light Loads with Integrated BOOT

Recharge FET

• Adjustable UVLO Voltage and Hysteresis

• UV and OV Power-Good Output

• 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 TPS54541 with

the WEBENCH® Power Designer

2 Applications

• Industrial Automation and Motor Control

• Vehicle Accessories: GPS (see SLVA412),

Entertainment

• USB-Dedicated Charging Ports and Battery

Chargers (see SLVA464)

• 12-V and 24-V Industrial, Automotive and

Communications Power Systems

3 Description

The TPS54541 device is a 42-V 5-A step-down

regulator with an integrated high-side MOSFET. The

device survives load dump pulses up to 45 V per ISO

7637. Current mode control provides simple external

compensation and flexible component selection. A

low-ripple pulse-skip mode reduces the no-load

supply current to 152 μA. When the enable pin is

pulled low, the shutdown supply current is reduced to

2 μA .

Undervoltage lockout is internally set at 4.3 V but can

increase using an external resistor divider at the

enable pin. The output voltage startup ramp is

controlled by the soft-start pin that can also be

configured for sequencing and tracking. An opendrain

power-good signal indicates the output is within

93% to 106% of the nominal voltage.

A wide adjustable switching-frequency range allows

for optimization of either efficiency or external

component size. Cycle-by-cycle current limit,

frequency foldback, and thermal shutdown protect

internal and external components during an overload

condition.

The TPS54541 device is available in a 10-pin 4-mm ×

4-mm WSON package.