MCP1755_12 Datasheet, PDF (1/40 Pages) Microchip Technology – 300 mA, 16V, High-Performance LDO

MCP1755/1755S
300 mA, 16V, High-Performance LDO
Features:
• High PSRR: >70 dB @ 1 kHz, typical
• 68.0 µA Typical Quiescent Current
• Input Operating Voltage Range: 3.6V to 16.0V
• 300 mA Output Current for all Output Voltages
• Low Dropout Voltage, 300 mV typical @ 300 mA
• Standard Output Voltage Options (1.8V, 2.5V,
2.8V, 3.0V, 3.3V, 4.0V, 5.0V)
• Output Voltage Range 1.8V to 5.5V in 0.1V
Increments (tighter increments are also possible
per design)
• Output Voltage Tolerances of ±2.0% over entire
Temperature Range
• Stable with Minimum 1.0 µF Output Capacitance
• Power Good Output
• Shutdown Input
• True Current Foldback Protection
• Short-Circuit Protection
• Overtemperature Protection
Applications:
• Battery-powered Devices
• Battery-powered Alarm Circuits
• Smoke Detectors
• CO₂ Detectors
• Pagers and Cellular Phones
• Smart Battery Packs
• Portable Digital Assistant (PDA)
• Digital Cameras
• Microcontroller Power
• Consumer Products
• Battery-powered Data Loggers
Related Literature:
• AN765, “Using Microchip’s Micropower LDOs”
(DS00765), Microchip Technology Inc., 2007
• AN766, “Pin-Compatible CMOS Upgrades to
BiPolar LDOs” (DS00766), Microchip Technology
Inc., 2003
• AN792, “A Method to Determine How Much
Power a SOT-23 Can Dissipate in an Application”
(DS00792), Microchip Technology Inc., 2001
Description:
The MCP1755/1755S is a family of CMOS low-dropout
(LDO) voltage regulators that can deliver up to 300 mA
of current while consuming only 68.0 µA of quiescent
current (typical). The input operating range is specified
from 3.6V to 16.0V, making it an ideal choice for four to
six primary cell battery-powered applications, 12V
mobile applications and one to three cell Li-Ion-
powered applications.
The MCP1755/1755S is capable of delivering 300 mA
with only 300 mV (typical) of input-to-output voltage
differential. The output voltage tolerance of the
MCP1755 is typically +0.85% at +25°C and ±2.0%
maximum over the operating junction temperature
range of -40°C to +125°C. Line regulation is ±0.01%
typical at +25°C.
Output voltages available for the MCP1755/1755S
range from 1.8V to 5.5V. The LDO output is stable when
using only 1 µF of output capacitance. Ceramic,
tantalum or aluminum electrolytic capacitors may all be
used for input and output. Overcurrent limit and
overtemperature shutdown provide a robust solution for
any application.
The MCP1755/1755S family has a true current foldback
feature. When the load impedance decreases beyond
the MCP1755/1755S load rating, the output current and
voltage will gracefully foldback towards 30 mA at about
0V output. When the load impedance increases and
returns to the rated load, the MCP1755/1755S will
follow the same foldback curve as the device comes out
of current foldback.
Package options for the MCP1755 include the
SOT-23-5, SOT-223-5 and 8-lead 2 x 3 DFN.
Package options for the MCP1755S device include the
SOT-223-3 and 8-lead 2 x 3 DFN.
 2012 Microchip Technology Inc.
DS25160A-page 1