Step-Down Converters offer flexible control from small CSP.
Press Release Summary:
Supplied in 2 x 2 x 0.7 mm CSP, MAX8884Y/MAX8884Z have dual 300 mA LDOs and individual logic on/off controls for each output. On-board, hysteretic, PWM-controlled step-down converter provides 2 switching-frequency options, letting designers optimize for efficiency (2 MHz) or solution size (4 MHz). Features such as individual enables for step-down converter and 2 LDO outputs as well as pin-selectable output voltages for step-down converter and one LDO further extend flexibility.
Original Press Release:
700mA Step-Down Converters Provide Flexible Control in a Tiny CSP
PWM step-down converters have dual 300mA LDOs in 2mm x 2mm chip-scale packages.
SUNNYVALE, CA-October 27, 2009-Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX8884Y/MAX8884Z 700mA step-down converters with dual 300mA LDOs in a 2mm x 2mm CSP (chip-scale package). The on-board, hysteretic, PWM-controlled step-down converter provides two switching-frequency options to allow designers to optimize for highest efficiency (2MHz) or smallest solution size (4MHz). The individual logic on/off controls for each output allow the user full control over output sequencing. To further enhance flexibility, the MAX8884Y/MAX8884Z have individual enables for the step-down converter and two LDO outputs, as well as pin-selectable output voltages for the step-down converter (1.2V/1.8V) and one LDO (1.8V/2.8V). Combining flexible control with high efficiency (> 90%) and a compact footprint, the MAX8884Y/MAX8884Z are well suited for powering multiload applications in portable devices such as cell phones, smartphones, MP3 and DVD players, and digital cameras/camcorders.
These buck converter ICs integrate three discrete devices into one chip to reduce pick-and-place and inventory costs, while saving board space for other value-added features. The two low-quiescent-current LDOs operate from an input voltage as low as 2.7V, generate only 26µVRMS (typ) output noise, and have a 65dB (typ) PSRR. The step-down converter guarantees 700mA output current with low output-voltage ripple ranging from 15mVP-P to 20mVP-P. This converter also integrates a synchronous rectifier to eliminate the need for an external Schottky diode, while its high-frequency switching allows the use of tiny external components to minimize solution size.
The MAX8884Y/MAX8884Z offer a very-low-power (0.1µA, typ) shutdown mode. Both devices feature thermal-overload and overcurrent protection, and are fully specified to operate over the -40°C to +85°C extended temperature range. The MAX8884Y/MAX8884Z are available in a lead-free, 2mm x 2mm x 0.7mm, 16-bump CSP. Prices start at $1.45 (2500-up, FOB USA).
Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 6100 products serving the industrial, communications, consumer, and computing markets.
Maxim reported revenue in excess of $1.6 billion for fiscal 2009. A Fortune 1000 company, Maxim is included in the Nasdaq 100, the Russell 1000, and the MSCI USA indices. For more information, go to www.maxim-ic.com.
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