Datasheet

ManualsBrandsMicrochip ManualsIntegrated Circuits (ICs)LDO Voltage Regulator 3.3V 1A SOT-223

 2007-2013 Microchip Technology Inc. DS22057B-page 1

MCP1826/MCP1826S

Features:

• 1000 mA Output Current Capability

• Input Operating Voltage Range: 2.3V to 6.0V

• Adjustable Output Voltage Range: 0.8V to 5.0V

(MCP1826 only)

• Standard Fixed Output Voltages:

- 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V

• Other Fixed Output Voltage Options Available

Upon Request

• Low Dropout Voltage: 250 mV Typical at 1000 mA

• Typical Output Voltage Tolerance: 0.5%

• Stable with 1.0 µF Ceramic Output Capacitor

• Fast Response to Load Transients

• Low Supply Current: 120 µA (typ)

• Low Shutdown Supply Current: 0.1 µA (typ)

(MCP1826 only)

• Fixed Delay on Power Good Output

(MCP1826 only)

• Short Circuit Current Limiting and

Overtemperature Protection

• TO-263-5 (DDPAK-5), TO-220-5, SOT-223-5

Package Options (MCP1826).

• TO-263-3 (DDPAK-3), TO-220-3, SOT-223-3

Package Options (MCP1826S).

Applications:

• High-Speed Driver Chipset Power

• Networking Backplane Cards

• Notebook Computers

• Network Interface Cards

• Palmtop Computers

Description:

The MCP1826/MCP1826S is a 1000 mA Low Dropout

(LDO) linear regulator that provides high-current and

low-output voltages. The MCP1826 comes in a fixed or

adjustable output voltage version, with an output

voltage range of 0.8V to 5.0V. The 1000 mA output cur-

rent capability, combined with the low-output voltage

capability, make the MCP1826 a good choice for new

sub-1.8V output voltage LDO applications that have

high current demands. The MCP1826S is a 3-pin fixed

voltage version.

The MCP1826/MCP1826S is stable using ceramic

output capacitors that inherently provide lower output

noise and reduce the size and cost of the entire

regulator solution. Only 1 µF of output capacitance is

needed to stabilize the LDO.

Using CMOS construction, the quiescent current

consumed by the MCP1826/MCP1826S is typically

less than 120 µA over the entire input voltage range,

making it attractive for portable computing applications

that demand high-output current. The MCP1826

versions have a Shutdown (SHDN

) pin. When shut

down, the quiescent current is reduced to less than

0.1 µA.

On the MCP1826 fixed output versions the scaled-

down output voltage is internally monitored and a

power good (PWRGD) output is provided when the

output is within 92% of regulation (typical). The

PWRGD delay is internally fixed at 200 µs (typical).

The overtemperature and short circuit current-limiting

provide additional protection for the LDO during system

Fault conditions.

1000 mA, Low-Voltage, Low Quiescent Current

LDO Regulator

Summary of content (38 pages)

PAGE 1
MCP1826/MCP1826S 1000 mA, Low-Voltage, Low Quiescent Current LDO Regulator Features: Description: • 1000 mA Output Current Capability • Input Operating Voltage Range: 2.3V to 6.0V • Adjustable Output Voltage Range: 0.8V to 5.0V (MCP1826 only) • Standard Fixed Output Voltages: - 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V • Other Fixed Output Voltage Options Available Upon Request • Low Dropout Voltage: 250 mV Typical at 1000 mA • Typical Output Voltage Tolerance: 0.5% • Stable with 1.
PAGE 2
MCP1826/MCP1826S Package Types MCP1826 DDPAK-5 MCP1826S TO-220-5 Fixed/Adjustable DDPAK-3 1 2 TO-220-3 3 1 1 2 3 4 5 2 3 1 2 3 4 5 SOT-223-5 SOT-223-3 6 4 1 2 3 4 1 5 2 3 Pin Fixed Adjustable Pin 1 SHDN SHDN 1 VIN 2 VIN VIN 2 GND (TAB) 3 GND (TAB) GND (TAB) 4 VOUT VOUT 5 PWRGD ADJ 6 GND (TAB) GND (TAB) DS22057B-page 2 3 VOUT 4 GND (TAB)  2007-2013 Microchip Technology Inc.
PAGE 3
MCP1826/MCP1826S Typical Application MCP1826 Fixed Output Voltage PWRGD R1 100 k On SHDN Off VIN = 2.3V to 2.8V 1 VIN VOUT = 1.8V @ 1000 mA VOUT GND C1 4.7 µF C2 1 µF MCP1826 Adjustable Output Voltage VADJ R1 40 k On R2 20 k SHDN Off VIN = 2.3V to 2.8V VIN 1 VOUT C1 4.7 µF GND  2007-2013 Microchip Technology Inc. VOUT = 1.
PAGE 4
MCP1826/MCP1826S Functional Block Diagram – Adjustable Output PMOS VIN VOUT Undervoltage Lockout (UVLO) ISNS Cf Rf SHDN ADJ/SENSE Overtemperature Sensing + Driver w/limit and SHDN EA – SHDN VREF V IN SHDN Reference Soft-Start Comp TDELAY GND 92% of VREF DS22057B-page 4  2007-2013 Microchip Technology Inc.
PAGE 5
MCP1826/MCP1826S Functional Block Diagram – Fixed Output (3-Pin) PMOS VIN VOUT Undervoltage Lockout (UVLO) Sense ISNS Cf Rf SHDN Overtemperature Sensing + Driver w/limit and SHDN EA – SHDN VREF V IN SHDN Reference Soft-Start Comp TDELAY GND 92% of VREF  2007-2013 Microchip Technology Inc.
PAGE 6
MCP1826/MCP1826S Functional Block Diagram – Fixed Output (5-Pin) PMOS VIN VOUT Undervoltage Lockout (UVLO) Sense ISNS Cf Rf SHDN Overtemperature Sensing + Driver w/limit and SHDN EA – SHDN VREF V IN SHDN Reference Soft-Start Comp GND TDELAY PWRGD 92% of VREF DS22057B-page 6  2007-2013 Microchip Technology Inc.
PAGE 7
MCP1826/MCP1826S 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † VIN ....................................................................................6.5V † 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.
PAGE 8
MCP1826/MCP1826S AC/DC CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise noted, VIN = VOUT(MAX) + VDROPOUT(MAX), Note 1, VR=1.8V for Adjustable Output, IOUT = 1 mA, CIN = COUT = 4.7 µF (X7R Ceramic), TA = +25°C. Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C Parameters Sym. Min. Typ. Max. Units VDROPOUT — 250 400 mV VPWRGD_VIN 1.0 — 6.0 V 1.2 — 6.
PAGE 9
MCP1826/MCP1826S AC/DC CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise noted, VIN = VOUT(MAX) + VDROPOUT(MAX), Note 1, VR=1.8V for Adjustable Output, IOUT = 1 mA, CIN = COUT = 4.7 µF (X7R Ceramic), TA = +25°C. Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C Parameters Sym. Min. Typ. Max. Units Power Supply Ripple Rejection Ratio PSRR — 60 — dB f = 100 Hz, COUT = 4.
PAGE 10
MCP1826/MCP1826S 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.
PAGE 11
MCP1826/MCP1826S Note: Unless otherwise indicated, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, Fixed output. 150 0.25 0.20 Quiescent Current (μA) Dropout Voltage (V) 0.30 VOUT = 5.0V Adj 0.15 VOUT = 2.5V Adj 0.10 0.05 0.00 0 200 400 600 800 VOUT = 0.8V IOUT = 0 mA 140 130 +130°C 120 +90°C +25°C 110 0°C 100 -45°C 90 1000 2 3 4 Input Voltage (V) Load Current (mA) FIGURE 2-7: Dropout Voltage vs.
PAGE 12
MCP1826/MCP1826S Note: Unless otherwise indicated, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, Fixed output. 0.040 IOUT = 0 mA 125 Line Regulation (%/V) Quiescent Current (μA) 130 120 115 110 VOUT = 2.5V 105 100 95 VOUT = 0.8V 90 IOUT = 1 mA 0.035 0.030 VR = 2.5V VIN = 3.1 to 6.0V IOUT = 50 mA 0.025 IOUT = 250 mA 0.020 IOUT = 1000 mA IOUT = 500 mA 0.
PAGE 13
MCP1826/MCP1826S Note: Unless otherwise indicated, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, Fixed output. 10.000 VR=0.8V, VIN=2.3V 0.25 VOUT = 2.5V Noise (P PV/ Hz) Dropout Voltage (V) 0.30 0.20 0.15 VOUT = 5.0V 0.10 1.000 IOUT=200 mA VR=3.3V, VIN=4.1V 0.100 0.05 0.00 0 200 400 600 800 0.010 0.01 1000 0.1 Load Current (mA) FIGURE 2-19: Current. Dropout Voltage vs.
PAGE 14
MCP1826/MCP1826S Note: Unless otherwise indicated, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, Fixed output. FIGURE 2-25: VIN. 2.5V (Adj.) Start-up from FIGURE 2-28: FIGURE 2-26: Shutdown. 2.5V (Adj.) Start-up from FIGURE 2-29: Dynamic Load Response (10 mA to 1000 mA). FIGURE 2-27: Timing. Power Good (PWRGD) FIGURE 2-30: Dynamic Load Response (100 mA to 1000 mA). DS22057B-page 14 Dynamic Line Response.
PAGE 15
MCP1826/MCP1826S 3.0 PIN DESCRIPTION The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE 3-Pin Fixed Output 5-Pin Fixed Output Adjustable Output Name Description — 1 1 SHDN Shutdown Control Input (active-low) 1 2 2 VIN 2 3 3 GND Ground Regulated Output Voltage 3 4 4 VOUT — 5 — PWRGD — — 5 ADJ Voltage Adjust/Sense Input EP Exposed Pad of the Package (ground potential) Exposed Pad 3.
PAGE 16
MCP1826/MCP1826S 4.0 DEVICE OVERVIEW EQUATION 4-2: The MCP1826/MCP1826S is a high output current, Low Dropout (LDO) voltage regulator. The low dropout voltage of 300 mV typical at 1000 mA of current makes it ideal for battery-powered applications. Unlike other high output current LDOs, the MCP1826/MCP1826S only draws a maximum of 220 µA of quiescent current. The MCP1826 has a shutdown control input and a power good output. 4.
PAGE 17
MCP1826/MCP1826S Larger LDO output capacitors can be used with the MCP1826/MCP1826S to improve dynamic performance and power supply ripple rejection performance. A maximum of 22 µF is recommended. Aluminum-electrolytic capacitors are not recommended for low-temperature applications of  -25°C. 4.4 Input Capacitor Low input source impedance is necessary for the LDO output to operate properly.
PAGE 18
MCP1826/MCP1826S 4.6 Shutdown Input (SHDN) The SHDN input is an active-low input signal that turns the LDO on and off. The SHDN threshold is a percentage of the input voltage. The typical value of this shutdown threshold is 30% of VIN, with minimum and maximum limits over the entire operating temperature range of 45% and 15%, respectively. The SHDN input will ignore low-going pulses (pulses meant to shut down the LDO) that are up to 400 ns in pulse width.
PAGE 19
MCP1826/MCP1826S 5.0 APPLICATION CIRCUITS/ ISSUES 5.1 Typical Application In addition to the LDO pass element power dissipation, there is power dissipation within the MCP1826/ MCP1826S as a result of quiescent or ground current. The power dissipation as a result of the ground current can be calculated using the following equation: The MCP1826/MCP1826S is used for applications that require high LDO output current and a power good output. EQUATION 5-2: P I  GND  = VIN  MAX   I VIN Where: VOUT = 2.
PAGE 20
MCP1826/MCP1826S The maximum power dissipation capability for a package can be calculated given the junction-toambient thermal resistance and the maximum ambient temperature for the application. Equation 5-4 can be used to determine the package maximum internal power dissipation.
PAGE 21
MCP1826/MCP1826S 5.3.1.2 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: TJ = TJ(RISE) + TA(MAX) TJ = 30.12°C + 60.0°C TJ = 90.12°C 5.3.1.3 Maximum Package Power Dissipation at 60°C Ambient Temperature TO-220-5 (29.3° C/W RJA): PD(MAX) = (125°C – 60°C) / 29.3°C/W PD(MAX) = 2.218W DDPAK-5 (31.
PAGE 22
MCP1826/MCP1826S 6.0 PACKAGING INFORMATION 6.1 Package Marking Information 3-Lead DDPAK (MCP1826S) XXXXXXXXX XXXXXXXXX YYWWNNN 1 2 Example: MCP1826S e3 08EEB^^ 0730256 3 1 3-Lead SOT-223 (MCP1826S) 1826S08 EDB0730 256 3-Lead TO-220 (MCP1826S) Example: XXXXXXXXX XXXXXXXXX YYWWNNN MCP1826S e3 12EAB^^ 0730256 1 1 2 3 Legend: XX...
PAGE 23
MCP1826/MCP1826S Package Marking Information (Continued) 5-Lead DDPAK (MCP1826) XXXXXXXXX XXXXXXXXX YYWWNNN MCP1826 e3 10EET^^ 0730256 1 2 3 4 5 1 2 3 4 5 5-Lead SOT-223 (MCP1826) XXXXXXX XXXYYWW NNN 5-Lead TO-220 (MCP1826) Example: 1826-08 EDC0730 256 Example: XXXXXXXXX XXXXXXXXX YYWWNNN MCP1826 08EAT^^ e3 0730256 1 2 3 4 5 1 2 3 4 5 Legend: XX...
PAGE 24
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MCP1826/MCP1826S Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2007-2013 Microchip Technology Inc.
PAGE 26
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PAGE 30
MCP1826/MCP1826S Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS22057B-page 30  2007-2013 Microchip Technology Inc.
PAGE 31
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MCP1826/MCP1826S % !" " & ! ## )RU WKH PRVW FXUUHQW SDFNDJH GUDZLQJV SOHDVH VHH WKH 0LFURFKLS 3DFNDJLQJ 6SHFLILFDWLRQ ORFDWHG DW KWWS ZZZ PLFURFKLS FRP SDFNDJLQJ DS22057B-page 32  2007-2013 Microchip Technology Inc.
PAGE 33
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PAGE 34
MCP1826/MCP1826S NOTES: DS22057B-page 34  2007-2013 Microchip Technology Inc.
PAGE 35
MCP1826/MCP1826S APPENDIX A: REVISION HISTORY Revision B (February 2013) The following is the list of modifications: • Updated the value of VDROPOUT (max) in Section 5.1 “Typical Application”. Revision A (August 2007) • Original Release of this Document.  2007-2013 Microchip Technology Inc.
PAGE 36
MCP1826/MCP1826S 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 XX X X X/ XX Output Feature Tolerance Temp. Package Voltage Code Device: MCP1826: 1000 mA Low Dropout Regulator MCP1826T: 1000 mA Low Dropout Regulator Tape and Reel MCP1826S: 1000 mA Low Dropout Regulator MCP1826ST: 1000 mA Low Dropout Regulator Tape and Reel Output Voltage *: 08 12 18 25 30 33 50 ADJ = = = = = = = = 0.
PAGE 37
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 38
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