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MCP1703A

Low Quiescent Current LDO Regulator



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MCP1703A pdf
MCP1703A
250 mA, 16V, Low Quiescent Current LDO Regulator
Features:
• Reduced Ground Current During Dropout
• Faster Startup Time
• 2.0 µA Typical Quiescent Current
• Input Operating Voltage Range: 2.7V to16.0V
• 250 mA Output Current for Output Voltages 2.5V
• 200 mA Output Current for Output Voltages < 2.5V
• Low Dropout Voltage, 625 mV Typical @ 250 mA
for VR = 2.8V
• 0.4% Typical Output Voltage Tolerance
• Standard Output Voltage Options:
- 1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V,
5.0V
• Output Voltage Range: 1.2V to 5.5V in 0.1V
Increments (50 mV increments available upon
request)
• A/D Friendly Voltage Options: 2.05V, 3.07V, 4.1V
• Stable with 1.0 µF to 22 µF Ceramic Output
Capacitance
• Short-Circuit Protection
• Overtemperature Protection
Applications:
• Battery-Powered Devices
• Battery-Powered Alarm Circuits
• Smoke Detectors
• CO2 Detectors
• Pagers and Cellular Phones
• Smart Battery Packs
• Low Quiescent Current Voltage Reference
• PDAs
• Digital Cameras
• Microcontroller Power
• Solar-Powered Instruments
• Consumer Products
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 SOT23 Can Dissipate in an Application”,
DS00792, Microchip Technology Inc., 2001
Description:
The MCP1703A is an improved version of the
MCP1703 low dropout (LDO) voltage regulator that can
deliver up to 250 mA of current while consuming only
2.0 µA of quiescent current (typical). The input
operating range is specified from 2.7V to 16.0V, making
it an ideal choice for two to six primary cell battery-
powered applications, 9V alkaline and one or two-cell
Li-Ion-powered applications.
The MCP1703A is capable of delivering 250 mA with
only 625 mV (typical) of input to output voltage
differential (VOUT = 2.8V). The output voltage tolerance
of the MCP1703A is typically ±0.4% at +25°C and ±3%
maximum over the operating junction temperature
range of -40°C to +125°C. Line regulation is ±0.1%
typical at +25°C.
Output voltages available for the MCP1703A range
from 1.2V to 5.5V. The LDO output is stable when using
only 1 µF of output capacitance. Ceramic, tantalum or
aluminum electrolytic capacitors can all be used for
input and output. Overcurrent limit and overtemperature
shutdown provide a robust solution for any application.
Package options include the SOT-223-3, SOT-23A,
2x3 DFN-8 and SOT-89-3.
Package Types
2x3 DFN*
VOUT 1
8 VIN
NC 2 EP 7 NC
NC 3 9 6 NC
GND 4
5 NC
SOT-89
VIN
SOT-23A
VIN
3
12
GND VOUT
SOT-223
123
GND VIN VOUT
1 23
VIN GND VOUT
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2012-2013 Microchip Technology Inc.
DS20005122B-page 1



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MCP1703A pdf
MCP1703A
Functional Block Diagrams
VIN
MCP1703A
Error Amplifier
Voltage
Reference
+VIN
-
+
Overcurrent
Overtemperature
VOUT
GND
Typical Application Circuits
9V
Battery
VIN
+ CIN
1 µF Ceramic
MCP1703A
VOUT
VIN VIN
GND
VOUT
3.3V
COUT
1 µF Ceramic
IOUT
50 mA
DS20005122B-page 2
2012-2013 Microchip Technology Inc.



Part Number MCP1703A
Description Low Quiescent Current LDO Regulator
Maker Microchip - Microchip
Total Page 30 Pages
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