Information
10
Portable Power Conversion Design Guide
DC/DC Conversion
Linear Regulators
MCP1710 Ultra-Low Quiescent Current LDO Regulator
The MCP1710 is low dropout (LDO) linear regulator that provides up to 200 mA of current to the load while maintaining an
ultra-low 20 nA of quiescent current consumption, and it comes in a tiny 2 × 2 DFN package.
MCP1710 Typical Application Circuit
MCP1755 300 mA, 16V, High-Performance LDO
The MCP1755 and MCP1755S are 16V, high PSRR voltage regulators with short-circuit current fold-back. These regulators
provide up to 300 mA of output current and accept a continuous input voltage from 3.6V to 16V, making them ideal for
automotive and commercial 12V DC systems. Delivering 80 dB of ripple rejection at 1 kHz, these devices are ideal for
AC-sensitive applications like GFCI and AFCI circuit breaker designs. The current fold-back feature gradually reduces the
device current down to 30 mA under short-circuit conditions to protect against damage. When the short is removed, the
device will recover and continue operating.
MCP1755 Typical Application Circuit
■ Ultra-low 20 nA (typical) quiescent current
■ Ultra-low 0.1 nA typical shutdown supply current
■ 200 mA output current capability for Vout < 3.5V
■ 100 mA output current capability for Vout > 3.5V
■ Wide 2.5V to 5.5V input operating voltage range
■ Standard output voltages: 1.2V, 1.8V, 2.5V, 3.3V, 4.2V
■ Low 450 mV (maximum) dropout voltage at 200 mA
■ Stable with a 1.0 µF ceramic output capacitor
■ Over-current protection
■ Space-saving, 8-lead plastic 8-pin 2 × 2 VDFN package
COUT
GND
V
IN
SHDN FB
V
OUT
CIN
MCP1710
■ High noise rejection, typical PSRR 80 dB at 1 kHz
■ Low 68 µA typical quiescent current
■ Wide 3.6V to 16.0V input operating voltage range
■ Supplies up to 300 mA output current for all
output voltages
■ Low 300 mV typical dropout voltage with a 300 mA load
■ High output accuracy, 0.85% typical output range
■ Standard output voltage options: 1.8V, 2.5V, 2.8V, 3.0V,
3.3V, 4.0V, 5.0V
■ Tight output tolerance ±2.0 % over entire operating
temperature range
■ Stable with minimum 1.0 µF output capacitance
■ Power good output
■ Shutdown input
■ Short-circuit protection with true output current fold-back
■ Over-temperature protection
GND
V
IN
VOUT
IOUT
30 mA
VOUT
5.0V
12V
C
IN
1 μF
Ceramic
COUT
1 μF
Ceramic
MCP1755S