Features

• HyperLight Load® Efficiency: Up to 80% at 10 mA

• Hyper Speed Control® architecture enables

- High Delta V Operation (VIN = 19V and VOUT

= 0.8V)

- Small Output Capacitance

• Input Voltage Range: 4.5V to 19V

• Output Current Up to 9A

• Up to 95% Efficiency

• Adjustable Output Voltage from 0.8V to 5.5V

• ±1% FB Accuracy

• Any Capacitor™ stable: Zero-to-High ESR

• 600 kHz Switching Frequency

• Power Good (PG) Output

• Foldback Current-Limit and “Hiccup” Mode

Short-Circuit Protection

• Safe Start-Up into Pre-Biased Loads

• –40°C to +125°C Junction Temperature Range

• Available in a 28-lead 5 mm x 6 mm VQFN

Package

Applications

• Servers and Work Stations

• Routers, Switches, and Telecom Equipment

• Base Stations

General Description

The MIC24054 is a constant-frequency, synchronous

DC/DC buck regulator that features adaptive on-time

control architecture. The MIC24054 operates over a

supply range of 4.5V to 19V. It has an internal linear

regulator that provides a regulated 5V to power the

internal control circuitry. The MIC24054 operates at a

constant 600 kHz switching frequency in continuous

conduction mode and can be used to provide up to 9A

of output current. The output voltage is adjustable

down to 0.8V.

Microchip’s HyperLight Load® architecture provides

the same high-efficiency and ultra-fast transient

response as the Hyper Speed Control® architecture

under medium to heavy loads, but also maintains high

efficiency under light load conditions by transitioning to

variable frequency, discontinuous mode operation.

The MIC24054 offers a full suite of protection features

to ensure protection of the IC during fault conditions.

These include undervoltage lockout to ensure proper

operation under power-sag conditions, thermal

shutdown, internal soft-start to reduce the inrush

current, foldback current limit and “hiccup mode”

short-circuit protection. The MIC24054 includes a

power good (PG) output to allow simple sequencing.

The 9A Hyper Speed Control part, MIC24053, is also

available from Microchip.