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 2012-2013 Microchip Technology Inc. DS20005122B-page 1

MCP1703A

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 V

=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

•CO

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 (V

OUT

= 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

GND V

OUT

GND V

OUT

SOT-23A

SOT-89

SOT-223

GND

OUT

GND

OUT

* Includes Exposed Thermal Pad (EP); see Table 3-1.

2x3 DFN*

250 mA, 16V, Low Quiescent Current LDO Regulator

Summary of content (31 pages)

PAGE 1
MCP1703A 250 mA, 16V, Low Quiescent Current LDO Regulator Features: 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.
PAGE 2
MCP1703A Functional Block Diagrams MCP1703A VOUT VIN Error Amplifier +VIN Voltage Reference + Overcurrent Overtemperature GND Typical Application Circuits MCP1703A VOUT 3.3V VOUT VIN 9V Battery DS20005122B-page 2 + CIN 1 µF Ceramic VIN VIN COUT 1 µF Ceramic IOUT 50 mA GND  2012-2013 Microchip Technology Inc.
PAGE 3
MCP1703A 1.0 † 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. ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † VDD........................................................
PAGE 4
MCP1703A DC CHARACTERISTICS (CONTINUED) 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 Dropout Voltage Note 1, Note 5 Symbol VDROPOUT Output Delay Time 5: 6: 7: Units Conditions 330 650 mV IL = 250 mA, VR = 5.0V 525 725 mV IL = 250 mA, 3.3V ≤ VR < 5.
PAGE 5
MCP1703A 2.0 TYPICAL PERFORMANCE CURVES The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
PAGE 6
MCP1703A Note: Unless otherwise indicated: COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX) or 2.7V, whichever is greater. 1.24 VOUT = 1.2V ILOAD = 1 mA 1.23 -45°C 0°C 1.22 VIN = 3.0V VOUT = 1.2V 1.23 1.21 +130°C 1.20 +90°C +25°C 1.19 Output Voltage (V) Output Voltage (V) 1.24 -45°C 1.22 1.21 1.20 1.19 1.18 1.16 2 4 6 8 10 12 14 16 0 18 20 40 Input Voltage (V) FIGURE 2-7: Voltage. Output Voltage vs.
PAGE 7
MCP1703A Note: Unless otherwise indicated: COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX) or 2.7V, whichever is greater. - 45°C 2.00 1.50 - 45°C, 0°C 0°C, +25°C, +90°C, +130°C 1.00 0.50 0.00 0 25 50 4 3 200 2 0 1 -200 0 75 100 125 150 175 200 225 250 0 500 1000 1500 Time (µs) FIGURE 2-16: -400 2500 Dynamic Line Response. 400 VIN VOUT = 2.5V +130°C +90°C +25°C 0°C - 45°C 0 25 50 75 100 125 150 175 200 225 250 VOUT = 2.
PAGE 8
MCP1703A 1.00 0.80 0.60 0.40 0.20 0.00 -0.20 -0.40 -0.60 -0.80 -1.00 VIN = 5V V = 3.45V IN 0.20 VOUT = 1.2V IOUT = 1 mA to 200 mA Line Regulation (%/V) Load Regulation (%) Note: Unless otherwise indicated: COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX) or 2.7V, whichever is greater. VIN = 14V VIN = 8V 0.16 VIN = 3.45 to 16.0V VOUT = 1.2V -20 5 30 55 80 105 0.08 0.
PAGE 9
MCP1703A 0 0 -10 -10 -20 -20 -30 -30 PSRR (dB) PSRR (dB) Note: Unless otherwise indicated: COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX) or 2.7V, whichever is greater. -40 -50 VR = 1.2V VIN = 2.9V VINAC = 200 mV p-p CIN = 0 μF IOUT = 10 mA -60 -70 -80 -90 0.01 0.1 1 10 Frequency (kHz) 100 -90 0.01 1000 PSRR vs. Frequency. Output Noise (μV/¥Hz) -30 -40 -50 VR = 1.2V VIN = 3.
PAGE 10
MCP1703A Note: Unless otherwise indicated: COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX) or 2.7V, whichever is greater. VOUT = 2.5V Step 100µ to 100 mA 1000 25 20 500 VOUT (ac) 15 0 10 -500 100 mA 5 -1000 100 µA Ground Current (µA) Output Voltage (mV) 20 30 1500 12 8 4 0 -1500 0 500 1000 1500 2000 VOUT = 5.0V IOUT = 10 mA 16 0 2500 18 16 14 Time (µs) Dynamic Load Response. Output Voltage (mV) 1500 VOUT = 2.
PAGE 11
MCP1703A 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: MCP1703A PIN FUNCTION TABLE 2x3 DFN SOT-223 SOT-23A SOT-89 Name Function 4 2,Tab 1 1 GND Ground Terminal 1 3 2 3 VOUT Regulated Voltage Output 8 1 3 2,Tab VIN Unregulated Supply Voltage 2, 3, 5, 6, 7 — — — NC No Connection 9 — — — EP Exposed Thermal Pad (EP); must be connected to VSS 3.1 Ground Terminal (GND) Regulator ground.
PAGE 12
MCP1703A 4.0 DETAILED DESCRIPTION 4.1 Output Regulation 4.3 A portion of the LDO output voltage is fed back to the internal error amplifier and compared with the precision internal band gap reference. The error amplifier output adjusts the amount of current that flows through the PChannel pass transistor, thus regulating the output voltage to the desired value.
PAGE 13
MCP1703A 5.0 FUNCTIONAL DESCRIPTION The MCP1703A CMOS low dropout linear regulator is intended for applications that need the lowest current consumption while maintaining output voltage regulation. The operating continuous load range of the MCP1703A is from 0 mA to 250 mA (VR ≥ 2.5V). The input operating voltage ranges from 2.7V to 16.0V, making it capable of operating from two or more alkaline cells or single and multiple Li-Ion cell batteries. 5.
PAGE 14
MCP1703A 6.0 APPLICATION CIRCUITS AND ISSUES 6.1 The MCP1703A is most commonly used as a voltage regulator. Its low quiescent current and low dropout voltage make it ideal for many battery-powered applications. MCP1703A GND VIN COUT 1 µF Ceramic FIGURE 6-1: 6.1.1 VIN 2.7V to 4.8V VOUT IOUT 50 mA T J ( MAX ) = P TOTAL × Rθ JA + T A ( MAX ) Where: Typical Application VOUT 1.
PAGE 15
MCP1703A 6.3 Voltage Regulator Internal power dissipation, junction temperature rise, junction temperature and maximum power dissipation are calculated in the following example. As a result of ground current, the power dissipation is small enough to be neglected. 6.3.1 Junction Temperature Estimate To estimate the internal junction temperature, the calculated temperature rise is added to the ambient or offset temperature. For this example, the worst-case junction temperature is estimated below.
PAGE 16
MCP1703A 6.5 Pulsed Load Applications For some applications, there are pulsed load current events that may exceed the specified 250 mA maximum specification of the MCP1703A. The internal current limit of the MCP1703A prevents high peak load demands from causing non-recoverable damage. The 250 mA rating is a maximum average continuous rating. As long as the average current does not exceed 250 mA, pulsed higher load currents can be applied to the MCP1703A.
PAGE 17
MCP1703A 7.0 PACKAGING INFORMATION 7.1 Package Marking Information 3-Lead SOT-23A Example: Standard Options for SOT-23A Symbol Voltage* Symbol Voltage* JGNN JMNN JFNN JHNN JNNN 1.2 1.5 1.8 2.5 2.8 JJNN JKNN JPNN JLNN — 3.0 3.3 4.0 5.0 — JG25 * Custom output voltages available upon request. Contact your local Microchip sales office for more information. Example: 3-Lead SOT-89 Standard Options for SOT-89 Symbol Voltage* Symbol Voltage* PA PF MZ PB PG 1.2 1.5 1.8 2.5 2.8 PC PD PH PE — 3.
PAGE 18
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MCP1703A Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2012-2013 Microchip Technology Inc.
PAGE 20
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MCP1703A Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2012-2013 Microchip Technology Inc.
PAGE 22
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PAGE 25
MCP1703A Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2012-2013 Microchip Technology Inc.
PAGE 26
MCP1703A NOTES: DS20005122B-page 26  2012-2013 Microchip Technology Inc.
PAGE 27
MCP1703A APPENDIX A: REVISION HISTORY Revision B (September 2013) The following is the list of modifications: 1. 2. Updated Figure 2-10, Figure 2-16, Figure 2-17, Figure 2-27, Figure 2-28, Figure 2-29 and Figure 2-30. Minor grammatical and editorial corrections. Revision A (March 2012) • Original Release of this Document.  2012-2013 Microchip Technology Inc.
PAGE 28
MCP1703A NOTES:  2012-2013 Microchip Technology Inc.
PAGE 29
MCP1703A PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. Device X- XX X X X/ XX Tape Output Feature Tolerance Temp. Package and Reel Voltage Code Device: MCP1703A: 250 mA, 16V Low Quiescent Current LDO Tape and Reel: T Output Voltage*: 12 = 1.2V “Standard” 15 = 1.5V “Standard” 18 = 1.8V “Standard” 25 = 2.5V “Standard” 28 = 2.8V “Standard” 30 = 3.0V “Standard” 33 = 3.3V “Standard” 40 = 4.
PAGE 30
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 31
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