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