1 Features

• 4.5V to 24V input voltage range

• 0.6V to 5.5V output voltage

• Integrated 9.2mΩ and 4.5mΩ FETs

• Support 12A continuous output current

• 90uA low quiescent current

• ± 1.0% reference voltage accuracy (25°C)

• D-CAP3™ control mode architecture control for fast

transient response

• Support POSCAP and all MLCC output capacitor

• Selectable Eco-mode and Out-of-Audio™ mode

with dynamic change

• ULQ™ extended battery life during system standby

• Built-in output discharge function

• Integrated power-good indicator

• 600kHz and 1MHz selectable switching frequency

• Fixed 1.0ms soft-start time

• Large duty cycle operation

• Cycle-by-cycle overcurrent and negative

overcurrent protection

• Latched output OV and UV protections

• Non-latched UVLO and OT protections

• –20°C to 125°C operating junction temperature

• 13-pin 3.0mm × 4.0mm HotRod™ VQFN package

• Create a custom design using the TPS51388 with

the WEBENCH® Power Designer

2 Applications

• Notebook and PC computers

• Ultrabook, handheld tablet computers

• Industrial PC, single-board computers

• Non-military drone

• Distributed power systems

3 Description

The device is a monolithic, 12A, synchronous buck

converter with integrated MOSFETs that enable

high efficiency and offer ease-of-use with minimum

external component count for space-conscious power

systems.

The TPS51388 employs D-CAP3 control mode that

provides fast transient response and excellent line

and load regulation with internal compensation.

The ULQ extended battery life feature is extremely

beneficial for long battery life in low power operation.

The large duty operation greatly improves the load

transient performance when input voltage is low.

The EN pin can be used to set Eco-mode or

Out-of-Audio (OOA) mode for light-load operation.

The Eco-mode maintains high efficiency during light

load operation. The OOA mode keeps the switching

frequency above audible frequency with minimum

reduction in efficiency. The EN pin can be toggled

dynamically, even when the converter is in operation.

The TPS51388 integrates a power-good indicator and

provides an output discharge function. The TPS51388

provides complete protection including OVP, UVP,

OCP, OTP, and UVLO. The device is available in

a 13-pin, 3.0mm × 4.0mm HotRod package, and

the junction temperature is specified from –20°C to

125°C.