Product specifications
The MxL76503 is a fully integrated, high-efficiency
synchronous step-down converter that requires a minimum
number of external components. It offers a very compact
solution with up to 3A continuous output current over a wide
input range.
The MxL76503 uses a proprietary constant on-time (COT)
control scheme that provides a superior transient response
and maintains a constant switching frequency during
continuous conduction mode (CCM) operation. The external
ramp compensation network enables stable operation
with ultra-low equivalent series resistance (ESR) output
ceramic capacitors. An internal compensated error amplifier
in the control loop provides excellent line and load regulation.
The MxL76503 integrates extensive protection functions,
including under-voltage lockout (UVLO), over-current
protection (OCP), under-voltage protection (UVP),
and thermal shutdown.
The MxL76503 offers two modes of operation, PFM
(MxL76503N) and forced PWM—FPWM—(MxL76503A),
to suit different applications. PFM mode provides high
efficiency at light loads and low standby power. FPWM mode
provides low ripple voltage and fast transient, even at light
loads.
The converter is available in a small 6-pin SOT23-6L
package.
