MIC28512 Series

70V/2A Synchronous Buck Regulator w/Hyper Speed Control™

Catalog

70V/2A Synchronous Buck Regulator w/Hyper Speed Control™

Part	Frequency - Switching [Min]	Frequency - Switching [Max]	Voltage - Output (Max) [Max]	Number of Outputs	Package / Case	Mounting Type	Supplier Device Package	Current - Output	Function	Output Configuration	Voltage - Input (Min) [Min]	Output Type	Voltage - Output (Min/Fixed)	Topology	Voltage - Input (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Utilized IC / Part	Main Purpose	Voltage - Input [Max]	Voltage - Input [Min]	Board Type	Outputs and Type	Outputs and Type	Frequency - Switching	Regulator Topology	Supplied Contents
Microchip Technology MIC28512-1YFL-T5	200 kHz	680 kHz	59.5 V	1	24-VFQFN Exposed Pad	Surface Mount	24-FCQFN (3x4)	2 A	Step-Down	Positive	4.6 V	Adjustable	0.8 V	Buck	70 V	-40 °C	125 ¯C
Microchip Technology MIC28512-2YFL-EV								2 A										MIC28512-2	DC/DC Step Down	70 V	4.6 V	Fully Populated	Non-Isolated	1	300 kHz	Buck	Board(s)
Microchip Technology MIC28512-1YFL-EV								2 A										MIC28512-1	DC/DC Step Down	70 V	4.6 V	Fully Populated	Non-Isolated	1	300 kHz	Buck	Board(s)

Catalog

70V/2A Synchronous Buck Regulator w/Hyper Speed Control™

Key Features

• * 4.6V to 70V operating input voltage supply

• * Up to 2A output current

• * Integrated high-side and low-side N-channel MOSFETs

• * HyperLight Load® (MIC28512-1) and Hyper Speed Control™ (MIC28512-2) architecture

• * Enable input and power good (PGOOD) output

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

• * Built-in 5V regulator for single-supply operation

• * Adjustable 200kHz to 680kHz switching frequency

• * Fixed 5ms soft-start

• * Internal compensation and thermal shutdown

• * Thermally enhanced 24-pin 3mm — 4mm FCQFN package

• * Junction temperature range of -40°C to +125°C

Description

The MIC28512 is a synchronous step-down switching regulator with internal power switches capable of providing up to 2A output current from a wide input supply range from 4.6V to 70V. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%. A constant switching frequency can be programmed from 200kHz to 680kHz. The Hyper Speed Control™ and HyperLight Load® architectures of the MIC28512 allow for high VIN (low VOUT) operation and ultra-fast transient response while reducing the required output capacitance and providing very good light load efficiency. The MIC28512 offers a full suite of protection features to ensure protections under fault conditions. These include under-voltage 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.