Datasheet

ManualsBrandsMicrochip ManualsIntegrated Circuits (ICs)LDO Voltage Regulator 3.3V 300mA SOT-223

 2012 Microchip Technology Inc. DS25160A-page 1

Features:

• High PSRR: >70 dB @ 1 kHz, typical

• 68.0 µA Typical Quiescent Current

• Input Operating Voltage Range: 3.6V to 16.0V

• 300 mA Output Current for all Output Voltages

• Low Dropout Voltage, 300 mV typical @ 300 mA

• Standard Output Voltage Options (1.8V, 2.5V,

2.8V, 3.0V, 3.3V, 4.0V, 5.0V)

• Output Voltage Range 1.8V to 5.5V in 0.1V

Increments (tighter increments are also possible

per design)

• Output Voltage Tolerances of ±2.0% over entire

Temperature Range

• Stable with Minimum 1.0 µF Output Capacitance

• Power Good Output

• Shutdown Input

• True Current Foldback Protection

• Short-Circuit Protection

• Overtemperature Protection

Applications:

• Battery-powered Devices

• Battery-powered Alarm Circuits

• Smoke Detectors

•CO

Detectors

• Pagers and Cellular Phones

• Smart Battery Packs

• Portable Digital Assistant (PDA)

•Digital Cameras

• Microcontroller Power

• Consumer Products

• Battery-powered Data Loggers

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 SOT-23 Can Dissipate in an Application”

(DS00792), Microchip Technology Inc., 2001

Description:

The MCP1755/1755S is a family of CMOS low-dropout

(LDO) voltage regulators that can deliver up to 300 mA

of current while consuming only 68.0 µA of quiescent

current (typical). The input operating range is specified

from 3.6V to 16.0V, making it an ideal choice for four to

six primary cell battery-powered applications, 12V

mobile applications and one to three cell Li-Ion-

powered applications.

The MCP1755/1755S is capable of delivering 300 mA

with only 300 mV (typical) of input-to-output voltage

differential. The output voltage tolerance of the

MCP1755 is typically +0.85% at +25°C and ±2.0%

maximum over the operating junction temperature

range of -40°C to +125°C. Line regulation is ±0.01%

typical at +25°C.

Output voltages available for the MCP1755/1755S

range from 1.8V to 5.5V. The LDO output is stable when

using only 1 µF of output capacitance. Ceramic,

tantalum or aluminum electrolytic capacitors may all be

used for input and output. Overcurrent limit and

overtemperature shutdown provide a robust solution for

any application.

The MCP1755/1755S family has a true current foldback

feature. When the load impedance decreases beyond

the MCP1755/1755S load rating, the output current and

voltage will gracefully foldback towards 30 mA at about

0V output. When the load impedance increases and

returns to the rated load, the MCP1755/1755S will

follow the same foldback curve as the device comes out

of current foldback.

Package options for the MCP1755 include the

SOT-23-5, SOT-223-5 and 8-lead 2 x 3 DFN.

Package options for the MCP1755S device include the

SOT-223-3 and 8-lead 2 x 3 DFN.

300 mA, 16V, High-Performance LDO

MCP1755/1755S

Summary of content (40 pages)

PAGE 1
MCP1755/1755S 300 mA, 16V, High-Performance LDO Features: Description: • • • • • • The MCP1755/1755S is a family of CMOS low-dropout (LDO) voltage regulators that can deliver up to 300 mA of current while consuming only 68.0 µA of quiescent current (typical). The input operating range is specified from 3.6V to 16.0V, making it an ideal choice for four to six primary cell battery-powered applications, 12V mobile applications and one to three cell Li-Ionpowered applications.
PAGE 2
MCP1755/1755S Package Types – MCP1755 SOT23-5 VOUT PWRGD SOT-223-5 5 4 EP-6 1 2 1 3 2 3 2 x 3 DFN* VOUT 1 PWRGD 2 NC 3 GND 4 4 5 SHDN 5 SHDN VIN GND VOUT PWRGD VIN GND SHDN EP 9 8 VIN 7 NC 6 NC * Includes Exposed Thermal Pad (EP); see Table 3-1 Package Types – MCP1755S SOT-223-3 2 x 3 DFN* VOUT 1 NC 2 NC 3 EP-4 GND 4 DS25160A-page 2 1 2 VIN GND EP 9 8 VIN 7 NC 6 NC 5 NC 3 VOUT * Includes Exposed Thermal Pad (EP); see Table 3-2  2012 Microchip Technology Inc.
PAGE 3
MCP1755/1755S Functional Block Diagrams MCP1755S VOUT VIN Error Amplifier +VIN Voltage Reference + Over Current Over Temperature GND MCP1755 PMOS VIN VOUT Undervoltage Lock Out (UVLO) Sense ISNS Cf Rf SHDN Overtemperature Sensing + Driver w/limit and SHDN EA – SHDN VREF V IN SHDN Reference Soft-Start Comp TDELAY PWRGD GND 92% of VREF  2012 Microchip Technology Inc.
PAGE 4
MCP1755/1755S Typical Application Circuits + CIN 1 µF Ceramic VIN 12V MCP1755S VOUT GND VOUT 5.0V COUT 1 µF Ceramic DS25160A-page 4 IOUT 30 mA  2012 Microchip Technology Inc.
PAGE 5
MCP1755/1755S 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Input Voltage, VIN .........................................................+17.6V VIN, PWRGD, SHDN................. (GND – 0.3V) to (VIN + 0.3V) VOUT................................................. (GND – 0.3V) to (+5.5V) Internal Power Dissipation ............ Internally-Limited (Note 6) Output Short Circuit Current ................................. Continuous Storage temperature .....................................
PAGE 6
MCP1755/1755S AC/DC CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise specified, all limits are established for VIN = VR + 1V, Note 1, ILOAD = 1 mA, COUT = 1 µF (X7R), CIN = 1 µF (X7R), TA = +25°C, tr(VIN) = 0.5 V/µs, SHDN = VIN, PWRGD = 10K to VOUT. Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C. Parameters Sym. Min. Output Voltage Regulation VOUT VR – 2.0% TCVOUT — 35 Line Regulation VOUT/ (VOUT x VIN) -0.05 ±0.01 +0.
PAGE 7
MCP1755/1755S AC/DC CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise specified, all limits are established for VIN = VR + 1V, Note 1, ILOAD = 1 mA, COUT = 1 µF (X7R), CIN = 1 µF (X7R), TA = +25°C, tr(VIN) = 0.5 V/µs, SHDN = VIN, PWRGD = 10K to VOUT. Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C. Parameters Sym. Min. Typ. Max.
PAGE 8
MCP1755/1755S TEMPERATURE SPECIFICATIONS (Note 1) Parameters Sym. Min. Typ. Max. Units TA -40 — +125 °C Operating Temperature Range TJ -40 — +150 °C Storage Temperature Range TA -55 — +150 °C JA — 62 — JC — 15 — JA — 62 — JC — 15 — JA — 256 — JC — 81 — JA — 70 — JC — 13.
PAGE 9
MCP1755/1755S 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 10
MCP1755/1755S Note 1: Unless otherwise indicated VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VR + 1V or VIN = 3.6V (whichever is greater), SHDN = VIN, package = SOT-223 3.330 Outtput Voltage (V) 3.0 Ou utput Voltage (V) 3.5 -45°C 0°C +25°C +90°C +130°C 2.5 2.0 1.5 10 1.0 +130°C 3.320 VOUT = 3.3V IOUT = 1 mA 0.0 0 3.310 0°C 3.300 -45°C 3.290 2 4 6 8 10 12 14 VOUT = 3.3V VIN = 4.3V 3.270 0 16 50 FIGURE 2-7: Voltage. Output Voltage vs.
PAGE 11
MCP1755/1755S 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 VOUT = 5.0V Output Current (A) Drop pout Voltage (V) Note 1: Unless otherwise indicated VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VR + 1V or VIN = 3.6V (whichever is greater), SHDN = VIN, package = SOT-223 +25°C +90°C +130°C 0°C -45°C 0 50 100 150 200 250 300 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 VOUT = 3.3V Hard Short Circuit ROUT < 0.
PAGE 12
MCP1755/1755S 0.030 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0 05 0.05 0.00 -0.05 -0.10 VOUT = 3.3V VIN = 16V VIN = 12V VIN = 10V VIN = 6V VIN = 4.3V VOUT = 3.3V IOUT = 1 mA to 300 mA -40 -25 -10 5 Line Regulation (%/V) Load d Regulation (%) Note 1: Unless otherwise indicated VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VR + 1V or VIN = 3.6V (whichever is greater), SHDN = VIN, package = SOT-223 0.025 300 mA 0.020 150 mA 50 mA 0 mA 0.010 0 005 0.005 0.
PAGE 13
MCP1755/1755S PSRR (dB) Note 1: Unless otherwise indicated VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VR + 1V or VIN = 3.6V (whichever is greater), SHDN = VIN, package = SOT-223 0 VOUT = 5.0V -10 VIN = 6.5V V -20 INAC = 1Vpk-pk CIN = 0 µF -30 IOUT = 10 mA -40 -50 -60 IOUT = 300 mA 70 -70 -80 -90 -100 0.01 0.1 1 10 Frequency (kHz) SHDN 100 0.010 0.01 VOUT = 3.3V VIN = 4.3V 0.
PAGE 14
MCP1755/1755S Note 1: Unless otherwise indicated VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C, VIN = VR + 1V or VIN = 3.6V (whichever is greater), SHDN = VIN, package = SOT-223 5.0 Startup p Delay Time (µs) Ou utput Voltage (V) 6.0 4.0 VIN = 6.0V VOUT = 5.0V 3.0 2.0 1.0 Increasing Load Decreasing Load 0.0 0 0.1 FIGURE 2-31: Foldback. 0.2 0.3 Output Current (A) 0.4 0.5 Short Circuit Current 1000 900 800 700 600 500 400 300 200 100 0 VOUT = 5.
PAGE 15
MCP1755/1755S 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1 and Table 3-2.
PAGE 16
MCP1755/1755S 3.5 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. The amount of capacitance required to ensure low source impedance will depend on the proximity of the input source capacitors or battery type. For most applications, 1 µF of capacitance will ensure stable operation of the LDO circuit.
PAGE 17
MCP1755/1755S 4.0 DEVICE OVERVIEW 4.3 The MCP1755/1755S is a 300 mA output current, lowdropout (LDO) voltage regulator. The low-dropout voltage of 300 mV typical at 300 mA of current makes it ideal for battery-powered applications. The input voltage range is 3.6V to 16.0V. Unlike other high output current LDOs, the MCP1755/1755S typically draws only 300 µA of quiescent current for a 300 mA load. The MCP1755 adds a shutdown control input pin and a power good output pin.
PAGE 18
MCP1755/1755S 4.5 Power Good Output (PWRGD) The open drain PWRGD output is used to indicate when the output voltage of the LDO is within 92% (typical value, see Section 1.0 “Electrical Characteristics” for Minimum and Maximum specifications) of its nominal regulation value. As the output voltage of the LDO rises, the open-drain PWRGD output will actively be held low until the output voltage has exceeded the power good threshold plus the hysteresis value.
PAGE 19
MCP1755/1755S 4.8 TDELAY_SHDN 400 ns (typical) 135 µs SHDN VOUT CLOAD = 1.0 µF FIGURE 4-4: Diagram. 4.7 Overtemperature Protection The MCP1755/1755S LDO has temperature-sensing circuitry to prevent the junction temperature from exceeding approximately +150°C. If the LDO junction temperature does reach +150°C, the LDO output will be turned off until the junction temperature cools to approximately +140°C, at which point the LDO output will automatically resume normal operation.
PAGE 20
MCP1755/1755S NOTES: DS25160A-page 20  2012 Microchip Technology Inc.
PAGE 21
MCP1755/1755S 5.0 APPLICATION CIRCUITS AND ISSUES 5.1 Typical Application The MCP1755/1755S is most commonly used as a voltage regulator. The low quiescent current and low dropout voltage make it ideal for many battery-powered applications. GND VIN COUT 1 µF Ceramic FIGURE 5-1: 5.1.1 VIN 3.6V to 4.8V VOUT IOUT 50 mA CIN 1 µF Ceramic Typical Application Circuit. APPLICATION INPUT CONDITIONS Package Type = SOT-23 Input Voltage Range = 3.6V to 4.8V VIN maximum = 4.8V VOUT typical = 1.
PAGE 22
MCP1755/1755S 5.3 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. EXAMPLE 5-1: POWER DISSIPATION 5.3.2 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 23
MCP1755/1755S 5.5 Pulsed Load Applications For some applications, there are pulsed load current events that may exceed the specified 300 mA maximum specification of the MCP1755/1755S. The internal current limit of the MCP1755/1755S will prevent high peak load demands from causing nonrecoverable damage. The 300 mA rating is a maximum average continuous rating. As long as the average current does not exceed 300 mA, higher pulsed load currents can be applied to the MCP1755/1755S.
PAGE 24
MCP1755/1755S NOTES: DS25160A-page 24  2012 Microchip Technology Inc.
PAGE 25
MCP1755/1755S 6.0 PACKAGING INFORMATION 6.
PAGE 26
MCP1755/1755S Package Marking Information (Continued) Example: 8-Lead DFN (2x3) Part Number DS25160A-page 26 First Line Code MCP1755-1802E/MC ALZ MCP1755T-1802E/MC ALZ MCP1755-3302E/MC AKA MCP1755T-3302E/MC AKA MCP1755-5002E/MC AKB MCP1755T-5002E/MC AKB MCP1755S-1802E/MC AMA MCP1755ST-1802E/MC AMA MCP1755S-3302E/MC AMB MCP1755ST-3302E/MC AMB MCP1755S-5002E/MC AMC MCP1755ST-5002E/MC AMC ALZ 240 256  2012 Microchip Technology Inc.
PAGE 27
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MCP1755/1755S " ! # )RU WKH PRVW FXUUHQW SDFNDJH GUDZLQJV SOHDVH VHH WKH 0LFURFKLS 3DFNDJLQJ 6SHFLILFDWLRQ ORFDWHG DW KWWS ZZZ PLFURFKLS FRP SDFNDJLQJ DS25160A-page 30  2012 Microchip Technology Inc.
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PAGE 32
MCP1755/1755S Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS25160A-page 32  2012 Microchip Technology Inc.
PAGE 33
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PAGE 34
MCP1755/1755S Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS25160A-page 34  2012 Microchip Technology Inc.
PAGE 35
MCP1755/1755S APPENDIX A: REVISION HISTORY Revision A (December 2012) • Original Release of this Document.  2012 Microchip Technology Inc.
PAGE 36
MCP1755/1755S NOTES: DS25160A-page 36  2012 Microchip Technology Inc.
PAGE 37
MCP1755/1755S 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- Tape and Reel Device: X Output Feature Voltage Code MCP1755: MCP1755T: MCP1755S: MCP1755ST: X X/ XX Tolerance Temp.
PAGE 38
MCP1755/1755S NOTES: DS25160A-page 38  2012 Microchip Technology Inc.
PAGE 39
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 40
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