Datasheet

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 2010 Microchip Technology Inc. DS22053C-page 1

MCP1802

Features:

• 300 mA Maximum Output Current

• Low Dropout Voltage, 200 mV typical @ 100 mA

• 25 µA Typical Quiescent Current

• 0.01 µA Typical Shutdown Current

• Input Operating Voltage Range: 2.0V to10.0V

• Standard Output Voltage Options:

- (0.9V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V, 6.0V)

• Output voltage accuracy:

-±2% (V

> 1.5V), ±30 mV (V

 1.5V)

• Stable with Ceramic output capacitors

• Current Limit Protection

• Shutdown pin

• High PSRR: 70 dB typical @ 10 kHz

Applications:

• Battery-powered Devices

• Battery-powered Alarm Circuits

• Smoke Detectors

•CO

Detectors

• Pagers and Cellular Phones

• Wireless Communications Equipment

• 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 SOT23 Can Dissipate in an Application”,

DS00792, Microchip Technology Inc., 2001

Description:

The MCP1802 is a family of CMOS low dropout (LDO)

voltage regulators that can deliver up to 300 mA of

current while consuming only 25 µA of quiescent

current (typical). The input operating range is specified

from 2.0V to 10.0V, 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 MCP1802 is capable of delivering 100 mA with

only 200 mV (typical) of input to output voltage

differential (V

OUT

= 3.0V). The output voltage tolerance

of the MCP1802 at +25°C is typically ±0.4% with a

maximum of ±2%. Line regulation is ±0.01% typical at

+25°C.

The LDO output is stable with a minimum of 1 µF of

output capacitance. Ceramic, tantalum or aluminum

electrolytic capacitors can all be used for input and

output. Overcurrent limit with current foldback provides

short-circuit protection. A shutdown (SHDN

) function

allows the output to be enabled or disabled. When

disabled, the MCP1802 draws only 0.01 µA of current

(typical).

The MCP1802 is available in a SOT-23-5 package.

Package Types

SOT-23-5

123

OUT

SHDNV

300 mA, High PSRR, Low Quiescent Current LDO

Summary of content (28 pages)

PAGE 1
MCP1802 300 mA, High PSRR, Low Quiescent Current LDO Features: Description: • • • • • • The MCP1802 is a family of CMOS low dropout (LDO) voltage regulators that can deliver up to 300 mA of current while consuming only 25 µA of quiescent current (typical). The input operating range is specified from 2.0V to 10.0V, 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.
PAGE 2
MCP1802 Functional Block Diagram MCP1802 +VIN VOUT VIN SHDN +VIN Shutdown Control Voltage Reference + Current Limiter Error Amplifier GND Typical Application Circuit MCP1802 VIN 1 VIN VOUT 5 3.3V @ 40 mA COUT mA 1 µF Ceramic SOT-23-5 9V Battery 2 GND 3 SHDN NC VOUT + CIN 4 1 µF Ceramic DS22053C-page 2  2010 Microchip Technology Inc.
PAGE 3
MCP1802 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 † Input Voltage ..............................................
PAGE 4
MCP1802 ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise specified, all limits are established for VIN = VR + 1.0V, Note 1, COUT = 1 µF (X7R), CIN = 1 µF (X7R), VSHDN = VIN, TA = +25°C Parameters Sym Min Typ Max Units Conditions Logic High Input VSHDN-HIGH 1.6 — — V — Logic Low Input VSHDN-LOW — — 0.25 V — Shutdown Input Note 1: 2: 3: 4: 5: The minimum VIN must meet two conditions: VIN2.0V and VIN (VR + 1.0V).
PAGE 5
MCP1802 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 = 3.
PAGE 6
MCP1802 Note: Unless otherwise indicated: VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VR + 1.0V, SOT-23-5. VOUT = 0.9V ILOAD = 1 mA 0.920 0.915 -45°C 0.910 0°C +25°C 0.905 0.900 0.920 0°C 0.915 Output Voltage (V) Output Voltage (V) 0.925 0.910 0.905 +25 0.900 -45°C 0.895 +90°C 0.890 0.885 +90°C 0.895 0.880 2 3 4 5 6 7 8 9 0 10 25 50 Output Voltage vs. Input 3.34 Output Voltage (V) VOUT = 3.3V ILOAD = 1 mA 0°C 3.
PAGE 7
MCP1802 Note: Unless otherwise indicated: VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VR + 1.0V, SOT-23-5. Dropout Voltage (V) 0.30 VOUT = 3.3V 0.25 0.20 +90°C 0.15 +25°C 0.10 -45°C 0.05 +0°C 0.00 0 25 50 75 100 125 150 Load Current (mA) FIGURE 2-13: Current. FIGURE 2-16: Dynamic Line Response. 160 0.30 VOUT = 6.0V Short Circuit Current (mA) Dropout Voltage (V) Dropout Voltage vs. Load 0.25 0.20 +90°C +25°C 0.15 0.10 -45°C 0.
PAGE 8
MCP1802 Note: Unless otherwise indicated: VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VR + 1.0V, SOT-23-5. VOUT = 3.3V IOUT = 0.1 mA to 150 mA -0.10 -0.20 VIN = 8V VIN = 6V VIN = 10V -0.30 -0.40 VIN = 4.3V -0.50 0.020 Line Regulation (%/V) Load Regulation (%) 0.00 -0.60 0.015 VOUT = 3.3V VIN = 4.3V to 10V 150 mA 100 mA 0.010 10 mA 0.005 0.000 -0.005 1 mA -0.010 -45 -22.5 0 22.5 45 67.5 90 -45 -22.
PAGE 9
MCP1802 PSRR (dB) Note: Unless otherwise indicated: VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 100 µA, TA = +25°C, VIN = VR + 1.0V, SOT-23-5. 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 0.01 VR= 6.0V VIN= 7.0V VINAC = 100 mV p-p CIN= 0 μF IOUT= 100 µA 0.1 1 10 Frequency (KHz) 100 1000 FIGURE 2-25: PSRR vs Frequency. FIGURE 2-28: Dynamic Load Response. FIGURE 2-26: Power Up Timing. FIGURE 2-29: SHDN. Power Up Timing From Noise ( µV/Hz) 10 Dynamic Load Response.
PAGE 10
MCP1802 NOTES: DS22053C-page 10  2010 Microchip Technology Inc.
PAGE 11
MCP1802 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin No. SOT-23-5 Name 1 VIN 2 GND 3 SHDN 3.1 4 NC 5 VOUT Function Unregulated Supply Voltage Ground Terminal Shutdown No connection Regulated Voltage Output Unregulated Input Voltage (VIN) Connect VIN to the input unregulated source voltage. Like all low dropout linear regulators, low source impedance is necessary for the stable operation of the LDO.
PAGE 12
MCP1802 NOTES: DS22053C-page 12  2010 Microchip Technology Inc.
PAGE 13
MCP1802 4.0 DETAILED DESCRIPTION 4.1 Output Regulation A portion of the LDO output voltage is fed back to the internal error amplifier and compared with the precision internal bandgap 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 14
MCP1802 MCP1802 +VIN VOUT VIN SHDN Shutdown Control +VIN Voltage Reference + Current Limiter Error Amplifier GND FIGURE 4-1: DS22053C-page 14 Block Diagram.  2010 Microchip Technology Inc.
PAGE 15
MCP1802 5.0 FUNCTIONAL DESCRIPTION The MCP1802 CMOS low dropout linear regulator is intended for applications that need the low current consumption while maintaining output voltage regulation. The operating continuous load range of the MCP1802 is from 0 mA to 300 mA. The input operating voltage range is from 2.0V to 10.0V, making it capable of operating from three or more alkaline cells or single and multiple Li-Ion cell batteries. 5.1 5.
PAGE 16
MCP1802 NOTES: DS22053C-page 16  2010 Microchip Technology Inc.
PAGE 17
MCP1802 6.0 APPLICATION CIRCUITS & ISSUES 6.1 The MCP1802 is most commonly used as a voltage regulator. Its low quiescent current and low dropout voltage make it ideal for many battery-powered applications. MCP1802 SHDN GND VOUT 1.8V IOUT 50 mA COUT 1 µF Ceramic FIGURE 6-1: 6.1.1 VIN VOUT VIN 2.4V to 5.
PAGE 18
MCP1802 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 Junction Temperature Estimate To estimate the internal junction temperature, the calculated temperature rise is added to the ambient or offset temperature.
PAGE 19
MCP1802 7.0 PACKAGING INFORMATION 7.1 Package Marking Information Example: 5-Lead SOT-23 Standard Options for SOT-23 XXNN Symbol Voltage * Symbol 9X_8# 0.9 9X_Z# 3.0 9X_B# 1.2 9B_2# 3.3 9X_K# 1.8 9B_M# 5.0 9X_T# 2.5 9B_Z# 6.0 * Custom output voltages available upon request. Contact your local Microchip sales office for more information. 1 Legend: XX...
PAGE 20
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PAGE 21
MCP1802 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
MCP1802 NOTES: DS22053C-page 22  2010 Microchip Technology Inc.
PAGE 23
MCP1802 APPENDIX A: REVISION HISTORY Revision C (October 2010) The following is the list of modifications: 1. 2. Removed Note 1 reference from the Dropout Voltage Parameter in the Electrical Characteristics table. Added Land Pattern package outline drawing C04-2091A. Revision B (January 2009) The following is the list of modifications: 1. 2. Added Shutdown Input information to the “Electrical characteristics” table. Added Figure 2-30. Revision A (June 2007) • Original Release of this Document.
PAGE 24
MCP1802 NOTES: DS22053C-page 24  2010 Microchip Technology Inc.
PAGE 25
MCP1802 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: MCP1802: 150 mA, Low Quiescent Current LDO Tape and Reel: T Output Voltage *: 09 = 0.9V “Standard” 12 = 1.2V “Standard” 18 = 1.8V “Standard” 25 = 2.5V “Standard” 30 = 3.0V “Standard” 33 = 3.3V “Standard” 50 = 5.0V “Standard” 60 = 6.
PAGE 26
MCP1802 NOTES: DS22053C-page 26  2010 Microchip Technology Inc.
PAGE 27
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 28
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