Document
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 batterypowered 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
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.
MCP1703A
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
VDD..................................................................................+18V All inputs and outputs w.r.t. .............(VSS-0.3V) to (VIN+0.3V) Peak Output Current ...................................................500 mA Storage temperature .....................................-65°C to +150°C Maximum Junction Temperature ................................. +150°C ESD protection on all pins (HBM; MM) ............. ≥ 4 kV; ≥ 400V
† Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits are established for VIN = VOUT(MAX) + VDROPOUT(MAX), Note 1, ILOAD = 1 mA, COUT = 1 µF (X7R), CIN = 1 µF (X7R), TA = +25°C. Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C.
Parameters
Symbol Min Typ Max Units
Conditions
Input / Output Characteristics
Input Operating Voltage
VIN 2.7 — 16.0 V Note 1
Input Quiescent Current
Iq — 2.0 5 µA IL = 0 mA
Maximum Output Current
IOUT
250 —
— mA For VR ≥ 2.5V
50 100 — mA For VR < 2.5V, VIN ≥ 2.7V
100 130 — mA For VR < 2.5V, VIN ≥ 2.95V
150 200 — mA For VR < 2.5V, VIN ≥ 3.2V
200 230 — mA For VR < 2.5V, VIN ≥ 3.45V
Output Short Circuit Current
IOUT_SC
—
400
—
mA VIN = VIN(MIN) (Note 1),
VOUT = GND,
Current (average current) measured
10 ms after short is applied.
Output Voltage Regulation
VOUT VR-3.0% VR±0.4% VR+3.0% V Note 2
VR-2.0% VR±0.4% VR+2.0%
V
VR-1.0% VR±0.4% VR+1.0% V 1% .