Datasheet

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MCP1701A

Features

• 2.0 µA Typical Quiescent Current

• Input Operating Voltage Range up to 10.0V

• Low-Dropout Voltage (LDO):

- 120 mV (typical) @ 100 mA

- 380 mV (typical) @ 200 mA

• High Output Current: 250 mA (V

OUT

= 5.0V)

• High-Accuracy Output Voltage: ±2% (max)

• Low Temperature Drift: ±100 ppm/°C (typical)

• Excellent Line Regulation: 0.2%/V (typical)

• Package Options: 3-Pin SOT-23A, 3-Pin SOT-89,

and 3-Pin TO-92

• Short Circuit Protection

• Standard Output Voltage Options:

- 1.8V, 2.5V, 3.0V, 3.3V, 5.0V

Applications

• Battery-Powered Devices

• Battery-Powered Alarm Circuits

• Smoke Detectors

•CO

Detectors

• Smart Battery Packs

•PDAs

• Low-Quiescent Current Voltage Reference

• Cameras and Portable Video Equipment

• Pagers and Cellular Phones

• Solar-Powered Instruments

• Consumer Products

• Microcontroller Power

General Description

The MCP1701A is a family of CMOS low-dropout,

positive voltage regulators that can deliver up to

250 mA of current while consuming only 2.0 µA of

quiescent current (typ.). The input operating range is

specified up to 10V, making it ideal for lithium-ion (one

or two cells), 9V alkaline and other two and three

primary cell battery-powered applications.

The MCP1701A is capable of delivering 250 mA with

an input-to-output voltage differential (dropout voltage)

of 650 mV. The low-dropout voltage extends the battery

operating lifetime. It also permits high currents in small

packages when operated with minimum V

– V

OUT

differentials. The MCP1701A offers improved startup

and transient response.

The MCP1701A has a tight tolerance output voltage

regulation of ±0.5% (typ.) and very good line regulation

at ±0.2%. The LDO output is stable when using only

1 µF of output capacitance of either tantalum or

aluminum-electrolytic style capacitors. The MCP1701A

LDO also incorporates short circuit protection to ensure

maximum reliability.

Package options include the 3-pin SOT-23A, 3-pin

SOT-89 and 3-Pin TO-92.

Package Types

GND V

OUT

MCP1701A

GND V

OUT

123

MCP1701A

3-Pin SOT-23A

3-Pin SOT-89

Note: 3-Pin SOT-23A is equivalent to the EIAJ

SC-59.

3-Pin TO-92

OUT

GND

Bottom

View

2 µA Low-Dropout Positive Voltage Regulator

Summary of content (22 pages)

PAGE 1
MCP1701A 2 µA Low-Dropout Positive Voltage Regulator Features General Description • 2.0 µA Typical Quiescent Current • Input Operating Voltage Range up to 10.0V • Low-Dropout Voltage (LDO): - 120 mV (typical) @ 100 mA - 380 mV (typical) @ 200 mA • High Output Current: 250 mA (VOUT = 5.0V) • High-Accuracy Output Voltage: ±2% (max) • Low Temperature Drift: ±100 ppm/°C (typical) • Excellent Line Regulation: 0.
PAGE 2
MCP1701A Functional Block Diagram MCP1701A VOUT VIN Short-Circuit Protection + – Voltage Reference GND Typical Application Circuits MCP1701A GND VOUT 3.3V IOUT 50 mA DS21991C-page 2 VIN VOUT VIN 9V Alkaline Battery CIN 1 µF Tantalum COUT 1 µF Tantalum © 2007 Microchip Technology Inc.
PAGE 3
MCP1701A 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Input Voltage ........................................................+12V Output Current (Continuous)..........PD/(VIN – VOUT)mA Output Current (peak) ..................................... 500 mA Output Voltage ............... (GND – 0.3V) to (VIN + 0.3V) Continuous Power Dissipation: 3-Pin SOT-23A ............................................ 150 mW 3-Pin SOT-89............................................... 500 mW 3-Pin TO-92 ...........
PAGE 4
MCP1701A TEMPERATURE CHARACTERISTICS Electrical Specifications: Unless otherwise specified, TA = +25°C.
PAGE 5
MCP1701A 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. 3 2.8 2.6 2.4 2.2 2 1.8 1.6 1.4 1.2 1 1.
PAGE 6
MCP1701A Note: Unless otherwise indicated, VOUT = 1.8V, 3.3V, 5.0V, TA = +25°C, CIN = 1 µF Tantalum, COUT = 1 µF Tantalum. 1.88 Output Voltage (V) Output Voltage (V) VR = 1.8V IOUT = 0.1 mA 1.86 1.84 +25°C 1.82 1.8 1.78 +90°C 1.76 1.74 -45°C 1.72 3 4 5 6 7 8 9 10 11 1.82 1.81 1.8 1.79 1.78 1.77 1.76 1.75 1.74 1.73 1.72 1.71 12 +90°C -45°C 0 20 Input Voltage (V) 3.4 +90°C +25°C 3.3 -45°C 3.28 3.26 100 3.31 +25°C 3.3 3.29 3.28 -45°C 3.27 3.26 3.
PAGE 7
MCP1701A Note: Unless otherwise indicated, VOUT = 1.8V, 3.3V, 5.0V, TA = +25°C, CIN = 1 µF Tantalum, COUT = 1 µF Tantalum. 0.7 VR = 1.8V Dropout Voltage (V) 0.6 +25°C 0.5 +90°C 0.4 -45°C 0.3 0.2 0.1 0.0 0 20 40 60 80 Load Current (mA) 100 FIGURE 2-13: Dropout Voltage vs. Load Current (VR = 1.8V). FIGURE 2-16: (VR = 1.8V). Start-up From VIN FIGURE 2-17: (VR = 3.3V). Start-up From VIN FIGURE 2-18: (VR = 5.0V). Start-up From VIN 0 Dropout Voltage (V) 0.50 VR = 3.3V 0.40 0.
PAGE 8
MCP1701A Note: Unless otherwise indicated, VOUT = 1.8V, 3.3V, 5.0V, TA = +25°C, CIN = 1 µF Tantalum, COUT = 1 µF Tantalum. 0.18 VR = 1.8V IOUT = 1 to 30 mA VIN = 6.0V -0.10 Line Regulation (%/V) Load Regulation (%) 0.00 -0.05 VIN = 3.0V -0.15 VIN = 8.0V -0.20 -0.25 VIN = 10.0V -0.30 -0.35 VIN = 12.0V -0.40 0.14 0.12 IOUT = 1.0 mA 0.10 0.08 IOUT = 10 mA 0.06 IOUT = 100 mA 0.04 0.02 0.00 -45 -30 -15 0 15 30 45 60 75 90 -45 -30 -15 Temperature (°C) VR = 3.
PAGE 9
MCP1701A 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 Name 1 1 1 GND Ground Terminal 3.1 2 3 3 VOUT Regulated Voltage Output 3 2 2 VIN Unregulated Supply Input 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 µA, typ.) flows out of this pin, there is no high current.
PAGE 10
MCP1701A 4.0 DETAILED DESCRIPTION 4.2 The MCP1701A is a low-quiescent current, precision, fixed-output voltage LDO. Unlike bipolar regulators, the MCP1701A supply current does not increase proportionally with load current. 4.1 Output Capacitor A minimum of 1 µF output capacitor is required. The output capacitor should have an ESR greater than 0.1Ω and less than 5Ω, plus a resonant frequency above 1 MHz. Larger output capacitors can be used to improve supply noise rejection and transient response.
PAGE 11
MCP1701A 5.0 THERMAL CONSIDERATIONS 5.1 Power Dissipation The amount of power dissipated internal to the LDO linear regulator is the sum of the power dissipation within the linear pass device (P-channel MOSFET) and the quiescent current required to bias the internal reference and error amplifier. The internal linear pass device power dissipation is calculated as shown in Equation 5-1.
PAGE 12
MCP1701A 6.0 PACKAGING INFORMATION 6.1 Package Marking Information 3-Pin SOT-23A 2 1 1 2 3 3-Pin TO-92 3-Pin SOT-89 1 2 3 4 5 6 7 8 Line 1 4 Line 2 3 1 4 1 , 2 , 3 & 4 represents first voltage digit 1V, 2V, 3V, 4V, 5V, 6V Ex: 3.xV = 2 9 10 11 12 5 represents first voltage digit (1-6) 6 represents first voltage decimal (0-9) 7 represents extra feature code: fixed: 0 8 represents regulation accuracy 2 = ±2.0% (standard) 3 represents first decimal place voltage (x.0 - x.9) Ex: 3.
PAGE 13
MCP1701A 3-Lead Plastic Small Outline Transistor (CB) [SOT-23A] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D e1 e 2 1 E E1 N b A c A2 φ L A1 Units Dimension Limits Number of Pins MILLIMETERS MIN NOM MAX N 3 Lead Pitch e 0.95 BSC Outside Lead Pitch e1 Overall Height A 0.89 – Molded Package Thickness A2 0.90 – 1.30 Standoff A1 0.00 – 0.15 Overall Width E 2.10 – 3.
PAGE 14
MCP1701A 3-Lead Plastic Small Outline Transistor Header (MB) [SOT-89] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D D1 E H L 1 N 2 b b1 b1 e E1 e1 A C Units Dimension Limits Number of Leads MILLIMETERS MIN N MAX 3 Pitch e 1.50 BSC Outside Lead Pitch e1 3.00 BSC Overall Height A 1.40 1.60 Overall Width H 3.94 4.25 Molded Package Width at Base E 2.29 2.
PAGE 15
MCP1701A 3-Lead Plastic Transistor Outline (TO) [TO-92] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging E A N 1 L 1 2 3 b e c D R Units Dimension Limits Number of Pins INCHES MIN N MAX 3 Pitch e Bottom to Package Flat D .125 .050 BSC .165 Overall Width E .175 .205 Overall Length A .170 .210 Molded Package Radius R .080 .105 Tip to Seating Plane L .500 – Lead Thickness c .014 .
PAGE 17
MCP1701A APPENDIX A: REVISION HISTORY Revisions C (February 2007) • Updated Packaging Information Revision B (September 2006) • Numerous changes to Section 1.0. Electrical Characteristics • Added disclaimer to package outline drawings. Revision A (February 2006) • Original Release of this Document. © 2007 Microchip Technology Inc.
PAGE 19
MCP1701A 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: MCP1701A: 2 µA Low-Dropout Positive Voltage Regulator Tape and Reel: T Output Voltage: 18 = 1.8V “Standard” 25 = 2.5V “Standard” 30 = 3.0V “Standard” 33 = 3.3V “Standard” 50 = 5.0V “Standard” *Contact factory for other output voltage options.
PAGE 21
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 22
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