Datasheet

ManualsBrandsMicrochip ManualsIntegrated Circuits (ICs)LDO Voltage Regulator 3V 250mA SOT-23A

 2010 Microchip Technology Inc. DS22008E-page 1

MCP1702

Features:

• 2.0 µA Quiescent Current (typical)

• Input Operating Voltage Range: 2.7V to 13.2V

• 250 mA Output Current for Output Voltages  2.5V

• 200 mA Output Current for Output Voltages < 2.5V

• Low Dropout (LDO) Voltage

- 625 mV typical @ 250 mA (V

OUT

= 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)

• Stable with 1.0 µF to 22 µF Output Capacitor

• 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

• Battery Powered Data Loggers

Related Literature:

• AN765, “Using Microchip’s Micropower LDOs”,

DS00765, Microchip Technology Inc., 2002

• AN766, “Pin-Compatible CMOS Upgrades to

Bipolar LDOs”, DS00766,

Microchip Technology Inc., 2002

• AN792, “A Method to Determine How Much

Power a SOT-23 Can Dissipate in an Application”,

DS00792, Microchip Technology Inc., 2001

Description:

The MCP1702 is a family of CMOS low dropout (LDO)

voltage regulators 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 13.2V, 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 MCP1702 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 MCP1702 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 MCP1702 range from

1.2V to 5.0V. 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-23A, SOT-89-3, and

TO-92.

Package Types

GND V

OUT

MCP1702

GND V

OUT

MCP1702

3-Pin SOT-23A

3-Pin SOT-89

3-Pin TO-92

OUT

GND

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250 mA Low Quiescent Current LDO Regulator

Summary of content (26 pages)

PAGE 1
MCP1702 250 mA Low Quiescent Current LDO Regulator Features: Description: • • • • • The MCP1702 is a family of CMOS low dropout (LDO) voltage regulators 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 13.2V, 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. • • • • • • 2.
PAGE 2
MCP1702 Functional Block Diagrams MCP1702 VOUT VIN Error Amplifier +VIN Voltage Reference + Overcurrent Overtemperature GND Typical Application Circuits MCP1702 VOUT 3.3V VOUT VIN VIN 9V Battery DS22008E-page 2 + CIN 1 µF Ceramic GND COUT 1 µF Ceramic IOUT 50 mA  2010 Microchip Technology Inc.
PAGE 3
MCP1702 1.0 ELECTRICAL CHARACTERISTICS † 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. Absolute Maximum Ratings † VDD.........................................................
PAGE 4
MCP1702 DC CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise specified, all limits are established for VIN = VOUT(MAX) + VDROPOUT(MAX), Note 1, ILOAD = 100 µA, COUT = 1 µF (X7R), CIN = 1 µF (X7R), TA = +25°C. Boldface type applies for junction temperatures, TJ of -40°C to +125°C.
PAGE 5
MCP1702 TEMPERATURE SPECIFICATIONS (Note 1) Parameters Sym Min TJ Typ Max Units Conditions -40 +125 °C Steady State Transient Temperature Ranges Operating Junction Temperature Range Maximum Junction Temperature TJ — +150 °C Storage Temperature Range TA -65 +150 °C JA — 336 — °C/W JC — 110 — °C/W JA — 153.3 — °C/W JC — 100 — °C/W JA — 131.9 — °C/W JC — 66.
PAGE 6
MCP1702 2.0 TYPICAL PERFORMANCE CURVES Note: 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. Note: Unless otherwise indicated: VR = 2.
PAGE 7
MCP1702 Note: Unless otherwise indicated: VR = 2.8V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX). VOUT = 1.2V ILOAD = 0.1 mA 1.23 -45°C 0°C 1.22 1.21 1.20 +130°C +90°C +25°C 1.19 1.23 Output Voltage (V) Output Voltage (V) 1.24 1.18 VOUT = 1.2V 0°C 1.22 -45°C 1.21 +25°C 1.20 +90°C +130°C 1.19 1.18 2 4 6 8 10 12 14 0 20 Input Voltage (V) FIGURE 2-7: Voltage. 2.85 +130°C +90°C 2.81 2.80 2.
PAGE 8
MCP1702 Note: Unless otherwise indicated: VR = 2.8V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX). Dropout Voltage (V) 1.40 VOUT = 1.8V 1.30 +130°C +90°C 1.20 +25°C 1.10 1.00 0°C 0.90 -45°C 0.80 0.70 0.60 100 120 140 160 180 200 Load Current (mA) Dropout Voltage (V) FIGURE 2-13: Current. Dropout Voltage vs. Load 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 FIGURE 2-16: Dynamic Line Response.
PAGE 9
MCP1702 0.20 0.15 0.10 0.05 0.00 -0.05 -0.10 -0.15 -0.20 -0.25 -0.30 0.20 VIN = 6V VIN = 4V VIN = 10V Line Regulation (%/V) Load Regulation (%) Note: Unless otherwise indicated: VR = 2.8V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX). VIN = 12V VIN = 13.2V VOUT = 1.2V ILOAD = 0.1 mA to 200 mA VOUT = 1.2V VIN = 2.7V to 13.2V 0.16 0.12 1 mA 0.08 0 mA 0.04 100 mA 0.
PAGE 10
MCP1702 Note: Unless otherwise indicated: VR = 2.8V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VOUT(MAX) + VDROPOUT(MAX). 0 -10 PSRR (dB) -20 -30 -40 -50 -60 VR=1.2V COUT=1.0 μF ceramic X7R VIN=2.7V CIN=0 μF IOUT=1.0 mA -70 -80 -90 0.01 0.1 1 10 Frequency (kHz) 100 1000 FIGURE 2-25: Power Supply Ripple Rejection vs. Frequency. FIGURE 2-28: Power Up Timing. FIGURE 2-29: Dynamic Load Response. FIGURE 2-30: Dynamic Load Response.
PAGE 11
MCP1702 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin No. SOT-23A Pin No. SOT-89 Pin No. TO-92 Symbol 1 1 1 GND Ground Terminal 2 3 3 VOUT Regulated Voltage Output 3 2, Tab 2 VIN Unregulated Supply Voltage – – – NC No connection 3.1 Ground Terminal (GND) Regulator ground. Tie GND to the negative side of the output and the negative side of the input capacitor. Only the LDO bias current (2.
PAGE 12
MCP1702 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 will adjust the amount of current that flows through the P-Channel pass transistor, thus regulating the output voltage to the desired value.
PAGE 13
MCP1702 5.0 FUNCTIONAL DESCRIPTION The MCP1702 CMOS LDO linear regulator is intended for applications that need the lowest current consumption while maintaining output voltage regulation. The operating continuous load range of the MCP1702 is from 0 mA to 250 mA (VR  2.5V). The input operating voltage range is from 2.7V to 13.2V, making it capable of operating from two or more alkaline cells or single and multiple Li-Ion cell batteries. 5.
PAGE 14
MCP1702 6.0 APPLICATION CIRCUITS AND ISSUES 6.1 The MCP1702 is most commonly used as a voltage regulator. Its low quiescent current and low dropout voltage makes it ideal for many battery-powered applications. VIN (2.8V to 3.2V) GND VIN VOUT CIN 1 µF Ceramic COUT 1 µF Ceramic FIGURE 6-1: 6.1.1 TJ(MAX) = PTOTAL = Typical Application Circuit. Input Voltage Range = 2.8V to 3.2V VIN maximum = 3.2V VOUT typical = 1.
PAGE 15
MCP1702 6.3 Voltage Regulator Internal power dissipation, junction temperature rise, junction temperature and maximum power dissipation are calculated in the following example. The power dissipation, as a result of ground current, is small enough to be neglected. 6.3.1 POWER DISSIPATION EXAMPLE Package Package Type = SOT-23A = 2.8V to 3.2V Input Voltage VIN LDO Output Voltages and Currents VOUT = 1.
PAGE 16
MCP1702 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 MCP1702. The internal current limit of the MCP1702 will prevent 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 MCP1702.
PAGE 17
MCP1702 7.0 PACKAGING INFORMATION 7.1 Package Marking Information 3-Pin SOT-23A Example: Standard Extended Temp Symbol Voltage * Symbol Voltage * HA HB HC HD HE 1.2 1.5 1.8 2.5 2.8 HF HG HH HJ — 3.0 3.3 4.0 5.0 — XXNN HANN Custom GA 4.5 GC 2.1 GB 2.2 GD 4.1 * Custom output voltages available upon request. Contact your local Microchip sales office for more information. Standard 3-Lead SOT-89 Symbol Voltage * Symbol Voltage * HA HB HC HD HE 1.2 1.5 1.8 2.5 2.8 HF HG HK HH HJ 3.0 3.3 3.
PAGE 18
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PAGE 19
MCP1702 Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2010 Microchip Technology Inc.
PAGE 20
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PAGE 21
MCP1702 Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2010 Microchip Technology Inc.
PAGE 22
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PAGE 23
MCP1702 APPENDIX A: REVISION HISTORY Revision E (November 2010) The following is the list of modifications: 1. Updated the Thermal Resistance Typical value for the SOT-89 package in the Junction Temperature Estimate section. Revision D (June 2009) The following is the list of modifications: 1. 2. DC Characteristics table: Updated the VOUT Temperature Coefficient’s maximum value. Section 7.0 “Packaging Information”: Updated package outline drawings.
PAGE 24
MCP1702 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: MCP1702: 2 µA Low Dropout Positive Voltage Regulator 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 25
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 26
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