MIC26950 Series

28V/12A Synchronous DC-DC Regulator w/Hyper Speed Control™

Catalog

28V/12A Synchronous DC-DC Regulator w/Hyper Speed Control™

Part	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Output Configuration	Frequency - Switching	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Max) [Max]	Function	Topology	Mounting Type	Current - Output	Package / Case	Number of Outputs	Supplier Device Package	Synchronous Rectifier	Voltage - Output (Min/Fixed)	Output Type
Microchip Technology MIC26950YJL-TR	4.5 V	26 V	Positive	300 kHz	-40 °C	125 ¯C	5.5 V	Step-Down	Buck	Surface Mount	12 A	28-PowerVQFN	1	28-QFN (5x6)		0.8 V	Adjustable

Catalog

28V/12A Synchronous DC-DC Regulator w/Hyper Speed Control™

Key Features

• * Hyper Speed Control™ architecture enables

• * High delta V operation (VIN = 26V and VOUT = 0.8V)

• * Small output capacitance

• * 4.5V to 26V input voltage

• * Adjustable output from 0.8V to 5.5V (±1% accuracy)

• * Any Capacitor™ Stable

• * Zero ESR to high-ESR output capacitance

• * 12A output current capability

• * 300kHz switching frequency

• * Internal compensation

• * Up to 95% efficiency

• * 6ms Internal soft-start

• * Foldback current-limit and "hiccup" mode short-circuit protection

• * Thermal shutdown

• * Supports safe start-up into a pre-biased load

• * -40°C to +125°C junction temperature range

Description

The MIC26950 is a constant-frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture. The MIC26950 operates over an input supply range of 4.5V to 26V and provides a regulated output at up to 12A of output current. The output voltage is adjustable down to 0.8V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300kHz. 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 digitally modified adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device. The MIC26950 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, internal soft-start to reduce inrush current, fold-back current limit, "hiccup" mode short-circuit protection and thermal shutdown.