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2-Channel PFM/PWM Synchronous Step-down DC/DC Converter IC

MB39A145

DESCRIPTION

MB39A145 is a N-ch/N-ch synchronous rectification type 2ch step-down DC/DC converter IC equipped with a bottom detection comparator for low output voltage ripple. It supports low on-duty operation to allow stable output of low voltages when there is a large difference between input and output voltages. This IC offers stable operations regardless of the ESR or type of the output smoothing capacitor. It also allows the high switching frequency setting, enabling the downsized peripheral circuits and low-cost configuration.

MB39A145 realizes ultra-rapid response and high efficiency with built-in enhanced protection features. It is most suitable for securing the power supply for ASIC or FPGA core, input/output devices, or memory.

FEATURES

• Fast transient response
• Requires no phase compasator circuit
• PFM function : Energy efficient in low current ranges
• Low on-duty operation
• Input voltage range : 6 V to 28 V
• Output voltage setting range : 0.7 V to 5.5 V

Press Release

• Fujitsu Announces Fast-Response DC/DC Converter IC for Consumer Electronics (November 16, 2009)

2-Channel Synchronous Step-down DC/DC Converter IC

MB39A138

By adopting the bottom detection comparator method, this product is capable of stable operation and rapid response even with large difference between input and output voltages and rapid load changes. It does not require phase compensation to prevent oscillation. System construction with a small number of parts is enabled through the use of a built-in bootstrap diode, which is required for FET operation.
This product has an output capacity of low voltage of approximately 1.0V with current at 10A or larger. It is capable of providing simultaneous power management to two destinations such as a LSI of core and I/O or a memory.
Its soft-start discharge function also enables simple power management sequence control when multiple voltages are used.

MB39A130A is 1-channel DC/DC converter IC adapting the bottom detection comparator method. Please see the corresponding specifications as well as 2-channel DC/DC converter IC, MB39A138.

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