The MCP1602 is a high efficient, fully integrated
500 mA synchronous buck regulator with a powergood
monitor. The 2.7V to 5.5V input voltage range and
low quiescent current (45 μA, typical) makes the
MCP1602 ideally suited for applications powered from
1-cell Li-Ion or 2-cell/3-cell NiMH/NiCd batteries.
At heavy loads, the MCP1602 operates in the 2.0 MHz
fixed frequency PWM mode which provides a low
noise, low output ripple, small-size solution. When the
load is reduced to light levels, the MCP1602
automatically changes operation to a PFM mode to
minimize quiescent current draw from the battery. No
intervention is necessary for a smooth transition from
one mode to another. These two modes of operation
allow the MCP1602 to achieve the highest efficiency
over the entire operating current range.
The open-drain power-good feature of the MCP1602
monitors the output voltage and provides indication
when the output voltage is within 94% (typical) of the
regulation value. The typical 2% hystereses in the
power-good transition threshold as well as a
262 ms (typical) delay time ensures accurate powergood
signaling.
The MCP1602 is available in either the 8-pin DFN or
MSOP package. It is also available with either an
adjustable or fixed output voltage. The available fixed
output voltage options are 1.2V, 1.5V, 1.8V, 2.5V, and
3.3V.
Additional protection features include: UVLO,
overtemperature, and overcurrent protection.