POWER AND LINEAR IC SOLUTIONS

Highly Compact, Fully Integrated Synchronous Buck Regulator is 95% Efficient

First in a new family of all-in-one regulators from Fairchild Semiconductor, the Moulded Leadless Packaged (MLP) FAN2106 offers up to 95% efficiency to improve system thermal performance, while substantially simplifying designs.

Part of Fairchild Semiconductor’s TinyBuck series of DC/DC buck regulators, the FAN2106 integrates an advanced analogue IC, MOSFETs and a boot diode into an ultra-compact MLP measuring only 5mm x 6mm. Requiring approximately 50% less board space than discrete solutions, it replaces one buck controller, two gate drivers and two MOSFETs. Fairchild believes it to be the smallest 6A, 24V-input integrated synchronous buck regulator currently on the market.

The FAN2106 achieves up to 95% power efficiency, the high-side MOSFET featuring a drain-source on-resistance of 30mΩ, while the corresponding low-side specification is 14mΩ. The device accepts input across a wide voltage range of 3V to 24V and produces an output voltage as low as 0.8V, while delivering up to 6A output current.



The device is aimed at a broad range of Point-of-Load (PoL) applications, including set-top boxes, cable modems, in-cabin GPS, portable medical equipment, LED lighting and industrial instrumentation, ultra-mobile PCs, notebooks and blade servers. For increased design flexibility, the FAN2106 features a programmable switching frequency. Current limit and loop response parameters are externally controllable, giving designers more choice in their selection of output filter components and transient response. The device uses a summing current mode modulator with lossless current sensing for current feedback and overcurrent and includes voltage feedforward.

Additional features include UnderVoltage LockOut (UVLO), overvoltage, overcurrent and thermal protection circuitry. A selectable power-saving mode extends system battery life at light loads. The device is RoHS compliant.

Features

• 6A synchronous buck regulator
• Over 95% efficiency
• Integrates MOSFETs, analogue IC and boot diode
• High-side R_DS(ON) 30mΩ: Low-side R_DS(ON) 14mΩ
• Integrated low-side Schottky diode
• Wide input range: 3.0V to 24V
• Output voltage range: 0.8V to 90% V_IN
• Programmable frequency operation
• Power-good signal
• Input UnderVoltage LockOut (UVLO)
• Programmable overcurrent protection
• Overvoltage and thermal protection
• Selectable light-load power-saving mode
• 5x6mm, 25-pin, three-pad MLP
• Choice of -10°C to +85°C or -45°C to +85°C temperature range

Applications

• Point-of-load regulation
• Set-top boxes
• Cable modems
• In-cabin GPS
• Portable medical equipment
• LED lighting
• Industrial instrumentation
• Mobile PCs and notebooks
• Blade servers
• Graphics cards
• Battery-powered equipment

For further information, including the FAN2106 Datasheet and details on how to obtain samples, please click here