The second generation of SupIRBuck™ family of integrated point-of-load (POL) voltage regulators features IR’s latest advantages in control IC, MOSFETs and package integration technologies to deliver up to 12A output current in a low-profile, thermally enhanced 5x6 mm Power-QFN package. The 4 Gen2 devices, IR3831MTRPBF, IR3840MTRPBF, IR3841MTRPBF and IR3842MTRPBF are fully featured for server, storage, netcom and telecom applications and are designed to offer benchmark efficiency over the entire load range and a very high switching frequency for significant overall system size reduction. While optimized for 12V input voltage, superior efficiencies are also achieved in applications with 9.6V, 5V or 3.3V input voltages. Moreover, the device’s common scalable footprint offer a high level of flexibility for easy on board implementation. Gen 1 SupIRBuck Products

FEATURES

	Wide input voltage range (1.5V to 16V with 5V bias)
	Pin compatible solutions for 4A, 8A and 12A
	Small footprint (5x6mm)
	Low height (0.9mm)
	Programmable frequency up to 1.5MHz
	1% accurate 0.7V reference voltage
	Programmable hiccup current limit
	Programmable soft start
	Enhanced pre-bias start up
	Thermal protection
	Enable pin with voltage monitoring capability
	Power Good output
	Optimized solutions for sequencing (IR3840/1/2) and DDR memory tracking (IR3831)
	-40oC to 125oC operating temperature

BENEFITS

	Integrated POL solution for up to 12Amps
	Delivers industry’s highest current rating in a 5x6mm QFN package
	Common footprint for 4A, 8A and 12A devices
	Provides design flexibility and allows cut-and-paste layout for fast time to market
	Eliminates the need for traditional dual stage POL conversion
	Saves energy, size and cost by operating directly from 12Vin
	Best in class efficiency over entire load range - greater than 96% peak
	Results in energy savings and very simple thermal management
	Excellent package thermal properties and low height
	Allows back-side board mounting for additional space saving
	Fully Featured for Server, Storage and Netcom applications
	Easy on-board implementation
	Small footprint and high switching frequency
	Smaller total solution size and cost

		NETCOM, SERVER, TELECOM, STORAGE
12A		IR3840
8A		IR3841		IR3831
4A
		IR3842
		OCP, TSD EN, PowerGood Sequencing	OCP, TSD EN, PowerGood DDR Tracking

Part Number	VIN Range (V)	VOUT Range (V)	Iout (A)	Switching Frequency (kHz)	Special Features
IR3831MPbF	1.5 - 16	0.7 - 0.9Vin	8	250KHz - 1.5MHz	DDR Tracking
IR3840MPbF	1.5 - 16	0.7 - 0.9Vin	12	250KHz - 1.5MHz	SEQ input
IR3841MPbF	1.5 - 16	0.7 - 0.9Vin	8	250KHz - 1.5MHz	SEQ input
IR3842MPbF	1.5 - 16	0.7 - 0.9Vin	4	250KHz - 1.5MHz	SEQ input

IR’s optimized power management system solutions deliver benchmark power density, efficiency and performance to meet the challenge of dramatically reducing annual kilowatt-per-hour savings and annual operating costs for data centers without the design trade-offs of technologies and performance versus cost and ease-of-design.