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MAX5066]
The MAX5066 is a two-phase, configurable single- or
dual-output buck controller with an input voltage range of
4.75V to 5.5V or from 5V to 28V. Each phase of the
MAX5066 is designed for 180° operation. A mode pin
allows for a dual-output supply or connecting two phases
together for a single-output, high-current supply. Each
output channel of the MAX5066 drives n-channel
MOSFETs and is capable of providing more than 25A of
load current. The MAX5066 uses average current-mode
control with a switching frequency up to 1MHz per phase
where each phase is 180° out of phase with respect to
the other. Out-of-phase operation results in significantly
reduced input capacitor ripple current and output voltage
ripple in dual-phase, single-output voltage applications.
Each buck regulator output has its own high-performance
current and voltage-error amplifier that can
be compensated for optimum output filter L-C values and
transient response.
The MAX5066 offers two enable inputs with accurate turn-on thresholds to allow for output voltage sequencing of the two outputs. The device's switching frequency can be programmed
from 100kHz to 1MHz with an external resistor. The
MAX5066 can be synchronized to an external clock. Each
output voltage is adjustable from 0.61V to 5.5V. Additional
features include thermal shutdown, "hiccup mode" short-circuit
protection. Use the MAX5066 with adaptive voltage
positioning for applications that require a fast transient
response, or accurate output voltage regulation.
The MAX5066 is available in a thermally enhanced 28-pin
TSSOP package capable of dissipating 1.9W. The device
is rated for operation over the -40°C to +85°C extended,
or -40°C to +125°C automotive temperature range.
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