MIC24055 Series

29V/12A DC-DC Buck Regulator w/Hyper Speed Control™

Catalog

29V/12A DC-DC Buck Regulator w/Hyper Speed Control™

Part	Voltage - Input (Max) [Max]	Package / Case	Voltage - Output (Max) [Max]	Current - Output	Topology	Frequency - Switching	Operating Temperature [Min]	Operating Temperature [Max]	Output Type	Output Configuration	Number of Outputs	Supplier Device Package	Voltage - Input (Min) [Min]	Function	Voltage - Output (Min/Fixed)	Mounting Type	Synchronous Rectifier
Microchip Technology MIC24055YJL-TR	19 V	28-PowerVQFN	5.5 V	12 A	Buck	600 kHz	-40 °C	125 ¯C	Adjustable	Positive	1	28-QFN (5x6)	4.5 V	Step-Down	0.8 V	Surface Mount

Catalog

29V/12A DC-DC Buck Regulator w/Hyper Speed Control™

Key Features

• * 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 12A

• * Up to 95% efficiency

• * Adjustable output voltage from 0.8V to 5.5V

• * ±1% feedback accuracy

• * Any Capacitor™ stable - zero-to-high ESR

• * 600kHz 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 28-pin 5mm — 6mm QFN package

Description

The MIC24055 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture. The MIC24055 operates over an input supply range of 4.5V to 19V and provides a regulated output of up to 12A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 600kHz. Hyper Speed Control™ architecture allows for ultra-fast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device. The MIC24055 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include under voltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, foldback current limit, "hiccup mode" short-circuit protection and thermal shutdown. An open-drain power good (PG) pin is provided. Also see the 12A HyperLight Load® part, MIC24056.