Power Electronics

High Frequency DC-DC Converters Feature Load-Dump Protection

From Maxim Integrated Products, the MAX5098A/MAX5099 are dual-output dc-dc converters capable of delivering 2 A and 1 A of output current, while switching at frequencies as high as 2.2 MHz. Designed to operate directly from a car battery, these converters integrate load-dump protection circuitry to handle transients up to 80 V, and they operate down to 4.5 V to withstand cold-crank conditions.

Device type: dual-output dc-dc converters with integrated power MOSFETs
Input voltage range: 4.5 V to 5.5 V or 5.2 V to 19 V with 80-V load dump protection
Output voltage: adjustable 0.8 V to 0.85 x VIN in buck configuration and VIN to 28 V in boost configuration (MAX5098A) and adjustable 0.8 V to 0.9 VIN (MAX5099)
Output voltage accuracy: %
Output current: 2A (IOUT1) and 1 A (IOUT2) in buck configuration (MAX5098A)
Quiescent current: 7 µA in standby
Efficiency: see datasheet
Features: integration of an n-channel MOSFET that can be used in a high-side or low-side configuration and allows these devices can be configured either as boost or buck converters; MAX5099 also integrates two low-side MOSFET drivers for synchronous operation; other features include a 200-kHz to 2.2-MHz, programmable switching-frequency range, ability to operate 180 degrees out-of-phase with an adjustable switching frequency, voltage-mode control for stable operation, external compensation, sync input. clock output for four-phase master-slave operation (‘5098A)
Operating temperature range: -40ºC to +125ºC
Packaging: 5-mm x 5-mm, 32-pin TQFN package
RoHS compliant? lead-free packaging
Target applications: automotive applications such as head units, instrument-cluster displays, and car radios
Pricing: Prices start at $2.59 each in quantities of 1000
Availability: available now
Data sheet posted on web? yes, see www.maxim-ic.com/MAX5098A and www.maxim-ic.com/MAX5099

TAGS: Products
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