MCP1827/MCP1827S 1.5A, Low Voltage, Low Quiescent Current LDO Regulator Features Description • 1.5A Output Current Capability • Input Operating Voltage Range: 2.3V to 6.0V • Adjustable Output Voltage Range: 0.8V to 5.0V (MCP1827 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: 330 mV Typical at 1.5A • 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) (MCP1827 only) • Fixed Delay on Power Good Output (MCP1827 only) • Short Circuit Current Limiting and Overtemperature Protection • 5-Lead Plastic DDPAK, 5-Lead TO-220 Package Options (MCP1827) • 3-Lead Plastic DDPAK, 3-Lead TO-220 Package Options (MCP1827S) The MCP1827/MCP1827S is a 1.5A Low Dropout (LDO) linear regulator that provides high current and low output voltages. The MCP1827 comes in a fixed or adjustable output voltage version, with an output voltage range of 0.8V to 5.0V. The 1.5A output current capability, combined with the low output voltage capability, make the MCP1827 a good choice for new sub-1.8V output voltage LDO applications that have high current demands. The MCP1827S is a 3-pin fixed voltage version. The MCP1827/MCP1827S is based upon the MCP1727 LDO device. The overtemperature and short circuit current-limiting provide additional protection for the LDO during system fault conditions. Package Types 5-LD DDPAK 5-LD TO-220 Fixed/Adjustable 3-LD DDPAK MCP1827S MCP1827 MCP1827 1 2 VOUT VIN GND(TAB) SHDN VIN GND(TAB) VOUT ADJ SHDN VIN GND(TAB) VOUT PWRGD © 2007 Microchip Technology Inc. MCP1827S 3 1 2 3 4 5 1 2 3 4 5 3-LD TO-220 1 2 3 VOUT High-Speed Driver Chipset Power Networking Backplane Cards Notebook Computers Network Interface Cards Palmtop Computers 2.5V to 1.XV Regulators On the MCP1827 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). VIN • • • • • • Using CMOS construction, the quiescent current consumed by the MCP1827/MCP1827S 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 MCP1827 versions have a Shutdown (SHDN) pin. When shut down, the quiescent current is reduced to less than 0.1 µA. GND(TAB) Applications The MCP1827/MCP1827S 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. DS22001C-page 1 MCP1827/MCP1827S Typical Application MCP1827 Fixed Output Voltage PWRGD R1 100 kΩ On SHDN Off VIN = 2.3V to 2.8V 1 2 3 4 5 VOUT = 1.8V @ 1A VOUT VIN GND C1 4.7 µF C2 1 µF MCP1827 Adjustable Output Voltage VADJ R1 40 kΩ On SHDN Off VIN = 2.3V to 2.8V C1 4.7 µF DS22001C-page 2 R2 20 kΩ 1 2 3 4 5 VOUT VIN VOUT = 1.2V @ 1A GND C2 1 µF © 2007 Microchip Technology Inc. MCP1827/MCP1827S Functional Block Diagram - Adjustable Output PMOS VIN VOUT Undervoltage Lock Out (UVLO) ISNS Cf Rf SHDN ADJ Overtemperature Sensing + Driver w/limit and SHDN EA – SHDN VREF V IN SHDN Reference Soft-Start Comp TDELAY GND 92% of VREF © 2007 Microchip Technology Inc. DS22001C-page 3 MCP1827/MCP1827S Functional Block Diagram - Fixed Output (5 pin) 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 DS22001C-page 4 © 2007 Microchip Technology Inc. MCP1827/MCP1827S Functional Block Diagram - Fixed Output (3-Pin) PMOS VIN VOUT Undervoltage Lock Out (UVLO) Sense ISNS Cf Rf SHDN Overtemperature Sensing + Driver w/limit and SHDN EA – SHDN VREF VIN SHDN Reference Soft-Start Comp TDELAY GND 92% of VREF © 2007 Microchip Technology Inc. DS22001C-page 5 MCP1827/MCP1827S 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. Exposure to maximum rating conditions for extended periods may affect device reliability. Maximum Voltage on Any Pin .. (GND – 0.3V) to (VDD + 0.3)V Maximum Power Dissipation......... Internally-Limited (Note 6) Output Short Circuit Duration ................................Continuous Storage temperature .....................................-65°C to +150°C Maximum Junction Temperature, TJ ........................... +150°C ESD protection on all pins (HBM/MM) ........... ≥ 2 kV; ≥ 200V AC/DC CHARACTERISTICS 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 Input Operating Voltage VIN 2.3 Input Quiescent Current Iq — Input Quiescent Current for SHDN Mode ISHDN Maximum Output Current Max Units 6.0 V Note 1 120 220 µA IL = 0 mA, VIN = Note 1, VOUT = 0.8V to 5.0V — 0.1 3 µA SHDN = GND IOUT 1.5 — — A VIN = 2.3V to 6.0V VR = 0.8V to 5.0V, Note 1 Line Regulation ΔVOUT/ (VOUT x ΔVIN) — 0.05 0.16 %/V Load Regulation ΔVOUT/VOUT -1.0 ±0.5 1.0 % IOUT = 1 mA to 1.5A, VIN = Note 1, (Note 4) IOUT_SC — 2.2 — A VIN = Note 1, RLOAD < 0.1Ω, Peak Current Output Short Circuit Current Typ Conditions (Note 1) ≤ VIN ≤ 6V Adjust Pin Characteristics (Adjustable Output Only) Adjust Pin Reference Voltage VADJ 0.402 0.410 0.418 V VIN = 2.3V to VIN = 6.0V, IOUT = 1 mA Adjust Pin Leakage Current IADJ -10 ±0.01 +10 nA VIN = 6.0V, VADJ = 0V to 6V TCVOUT — 40 — ppm/°C Adjust Temperature Coefficient Note 3 Fixed-Output Characteristics (Fixed Output Only) Note 1: 2: 3: 4: 5: 6: 7: The minimum VIN must meet two conditions: VIN ≥ 2.3V and VIN ≥ VOUT(MAX) + VDROPOUT(MAX). VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output voltage for the adjustable cases. VR = VADJ * ((R1/R2)+1). Figure 4-1. TCVOUT = (VOUT-HIGH – VOUT-LOW) *106 / (VR * ΔTemperature). VOUT-HIGH is the highest voltage measured over the temperature range. VOUT-LOW is the lowest voltage measured over the temperature range. Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested over a load range from 1 mA to the maximum specified output current. Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its nominal value that was measured with an input voltage of VIN = VOUTMAX + VDROPOUT(MAX). The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. (i.e., TA, TJ, θJA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above 150°C can impact device reliability. The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient temperature is not significant. DS22001C-page 6 © 2007 Microchip Technology Inc. MCP1827/MCP1827S 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 Voltage Regulation Sym Min Typ Max Units VOUT VR - 2.5% VR ±0.5% VR + 2.5% V VIN-VOUT — 330 600 mV VPWRGD_VIN 1.0 — 6.0 V 1.2 — 6.0 Conditions Note 2 Dropout Characteristics Dropout Voltage Note 5, IOUT = 1.5A, VIN(MIN) = 2.3V Power Good Characteristics PWRGD Input Voltage Operating Range TA = +25°C TA = -40°C to +125°C For VIN < 2.3V, ISINK = 100 µA %VOUT Falling Edge PWRGD Threshold Voltage (Referenced to VOUT) VPWRGD_TH 90 92 94 PWRGD Threshold Hysteresis VPWRGD_HYS 1.0 2.0 3.0 %VOUT PWRGD Output Voltage Low VPWRGD_L — 0.2 0.4 V IPWRGD SINK = 1.2 mA, ADJ = 0V PWRGD Leakage PWRGD_LK — 1 — nA VPWRGD = VIN = 6.0V TPG — 200 — µs Rising Edge RPULLUP = 10 kΩ TVDET-PWRGD — 200 — µs VADJ or VOUT = VPWRGD_TH + 20 mV to VPWRGD_TH - 20 mV Logic High Input VSHDN-HIGH 45 %VIN VIN = 2.3V to 6.0V Logic Low Input VSHDN-LOW 15 %VIN VIN = 2.3V to 6.0V +0.1 µA VIN = 6V, SHDN =VIN, SHDN = GND µs SHDN = GND to VIN VOUT = GND to 95% VR PWRGD Time Delay Detect Threshold to PWRGD Active Time Delay 89 92 VOUT < 2.5V Fixed, VOUT = Adj. 95 VOUT >= 2.5V Fixed Shutdown Input SHDN Input Leakage Current SHDNILK -0.1 ±0.001 AC Performance Output Delay From SHDN Output Noise Note 1: 2: 3: 4: 5: 6: 7: TOR eN 100 — 2.0 — µV/√Hz IOUT = 200 mA, f = 1 kHz, COUT = 10 µF (X7R Ceramic), VOUT = 2.5V The minimum VIN must meet two conditions: VIN ≥ 2.3V and VIN ≥ VOUT(MAX) + VDROPOUT(MAX). VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output voltage for the adjustable cases. VR = VADJ * ((R1/R2)+1). Figure 4-1. TCVOUT = (VOUT-HIGH – VOUT-LOW) *106 / (VR * ΔTemperature). VOUT-HIGH is the highest voltage measured over the temperature range. VOUT-LOW is the lowest voltage measured over the temperature range. Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested over a load range from 1 mA to the maximum specified output current. Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its nominal value that was measured with an input voltage of VIN = VOUTMAX + VDROPOUT(MAX). The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. (i.e., TA, TJ, θJA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above 150°C can impact device reliability. The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient temperature is not significant. © 2007 Microchip Technology Inc. DS22001C-page 7 MCP1827/MCP1827S 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 = 10 µF, IOUT = 10 mA, VINAC = 30 mV pk-pk, CIN = 0 µF Thermal Shutdown Temperature TSD — 150 — °C IOUT = 100 µA, VOUT = 1.8V, VIN = 2.8V ΔTSD — 10 — °C IOUT = 100 µA, VOUT = 1.8V, VIN = 2.8V Thermal Shutdown Hysteresis Note 1: 2: 3: 4: 5: 6: 7: Conditions The minimum VIN must meet two conditions: VIN ≥ 2.3V and VIN ≥ VOUT(MAX) + VDROPOUT(MAX). VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output voltage for the adjustable cases. VR = VADJ * ((R1/R2)+1). Figure 4-1. TCVOUT = (VOUT-HIGH – VOUT-LOW) *106 / (VR * ΔTemperature). VOUT-HIGH is the highest voltage measured over the temperature range. VOUT-LOW is the lowest voltage measured over the temperature range. Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested over a load range from 1 mA to the maximum specified output current. Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its nominal value that was measured with an input voltage of VIN = VOUTMAX + VDROPOUT(MAX). The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. (i.e., TA, TJ, θJA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above 150°C can impact device reliability. The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient temperature is not significant. TEMPERATURE SPECIFICATIONS Electrical Specifications: Unless otherwise indicated, all limits apply for VIN = 2.3V to 6.0V. Parameters Sym Min Typ Max Units Conditions Operating Junction Temperature Range TJ -40 — +125 °C Steady State Maximum Junction Temperature TJ — — +150 °C Transient Storage Temperature Range TA -65 — +150 °C Thermal Resistance, 5LD DDPAK θJA — 31.2 — °C/W 4-Layer JC51 Standard Board Thermal Resistance, 3LD DDPAK θJA — 31.4 — °C/W 4-Layer JC51 Standard Board Thermal Resistance, 5LD TO-220 θJA — 29.3 — °C/W 4-Layer JC51 Standard Board Thermal Resistance, 3LD TO-220 θJA — 29.4 — °C/W 4-Layer JC51 Standard Board Temperature Ranges Thermal Package Resistances DS22001C-page 8 © 2007 Microchip Technology Inc. MCP1827/MCP1827S 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, VOUT = 1.8V (Adjustable), VIN = 2.8V, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, RPWRGD = 10 kΩ To VIN. Note: Junction Temperature (TJ) is approximated by soaking the device under test to an ambient temperature equal to the desired Junction temperature. The test time is small enough such that the rise in Junction temperature over the Ambient temperature is not significant. Line Regulation (%/V) Quiescent Current (μA) 150 140 130 130°C 90°C 120 25°C 110 -45°C 100 VOUT = 1.2V Adj IOUT = 0 mA 90 2 3 4 5 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 VOUT = 1.2V adj VIN = 2.3V to 6.0V IOUT = 1 mA IOUT = 1000 mA IOUT = 100 mA IOUT = 500 mA -45 6 -20 5 30 0.15 200 190 180 170 160 150 140 130 120 110 100 80 105 130 FIGURE 2-4: Line Regulation vs. Temperature (1.2V Adjustable). VIN=5.0V VIN=3.3V VOUT = 1.2V Adj VIN=2.3V Load Regulation (%) Ground Current (µA) FIGURE 2-1: Quiescent Current vs. Input Voltage (1.2V Adjustable). VOUT = 3.3V 0.10 IOUT = 1.0 mA to 1500 mA 0.05 0.00 VOUT = 0.8V -0.05 VOUT = 1.8V VOUT = 5.0V -0.10 -0.15 0 250 500 750 1000 1250 1500 -45 -20 5 Load Current (mA) 30 55 80 105 130 Temperature (°C) FIGURE 2-2: Ground Current vs. Load Current (1.2V Adjustable). FIGURE 2-5: Load Regulation vs. Temperature (Adjstable Version). 0.411 140 IOUT = 0 mA VOUT = 1.2V Adj 135 Adjust Pin Voltage (V) Quiescent Current (μA) 55 Temperature (°C) Input Voltage (V) 130 125 120 VIN=5.0V 115 VIN=2.5V 110 VIN=4.0V 105 VIN = 6.0V 0.410 VIN = 5.0V 0.410 VIN = 2.3V 0.409 0.409 IOUT = 1.0 mA 0.408 100 -45 -20 5 30 55 80 105 130 -45 © 2007 Microchip Technology Inc. 5 30 55 80 105 130 Temperature (°C) Temperature (°C) FIGURE 2-3: Quiescent Current vs. Junction Temperature (1.2V Adjustable). -20 FIGURE 2-6: Temperature. Adjust Pin Voltage vs. DS22001C-page 9 MCP1827/MCP1827S Note: Unless otherwise indicated, VOUT = 1.8V (Adjustable), VIN = 2.8V, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, RPWRGD = 10 kΩ To VIN. 150 VOUT = 5.0V Adj 0.30 Quiescent Current (μA) Dropout Voltage (V) 0.35 0.25 0.20 VOUT = 2.5V Adj 0.15 0.10 0.05 VOUT = 0.8V IOUT = 0 mA 140 +130°C 130 +85°C 120 +25°C 110 -45°C 100 90 80 0.00 0 250 500 750 1000 1250 2 1500 3 FIGURE 2-7: Dropout Voltage vs. Load Current (Adjustable Version). 0.36 VOUT = 3.3V Adj VOUT = 2.5V Adj 0.32 Quiescent Current (μA) Dropout Voltage (V) 150 VOUT = 5.0V Adj 0.34 VOUT = 2.5V IOUT = 0 mA 140 +130°C 130 +90°C 120 +25°C 110 -45°C 100 90 80 0.30 -45 -20 5 30 55 80 105 3 130 3.5 FIGURE 2-8: Dropout Voltage vs. Temperature (Adjustable Version). 370 340 330 VIN = 5.0V 320 5 5.5 6 250.00 Ground Current (μA) VIN = 4.5V 350 4.5 FIGURE 2-11: Quiescent Current vs. Input Voltage (2.5V Fixed). VOUT = 3.3V Fixed VIN = 3.9V 360 4 Input Voltage (V) Temperature (°C) Power Good Time Delay (µs) 6 FIGURE 2-10: Quiescent Current vs. Input Voltage (0.8V Fixed). IOUT = 1.5A 0.40 0.38 5 Input Voltage (V) Load Current (mA) 0.42 4 310 300 200.00 VOUT=0.8V 150.00 VOUT=2.5V 100.00 50.00 VIN = 2.3V for VR=0.8V VIN = 3.1V for VR=2.5V 0.00 -45 -20 5 30 55 80 105 130 0 Temperature (°C) FIGURE 2-9: Power Good (PWRGD) Time Delay vs. Temperature (Adjustable Version). DS22001C-page 10 250 500 750 1000 1250 1500 Load Current (mA) FIGURE 2-12: Current. Ground Current vs. Load © 2007 Microchip Technology Inc. MCP1827/MCP1827S Note: Unless otherwise indicated, VOUT = 1.8V (Adjustable), VIN = 2.8V, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, RPWRGD = 10 kΩ To VIN. 0.045 IOUT = 0 mA 125 Line Regulation (%/V) Quiescent Current (μA) 130 120 115 110 VOUT = 0.8V 105 100 VOUT = 2.5V 95 -45 -20 5 VR = 2.5V VIN = 3.1 to 6.0V 0.040 IOUT = 1 mA 0.035 0.030 IOUT = 100 mA 0.025 IOUT = 1000 mA IOUT = 1500 mA 0.015 30 55 80 105 -45 130 -20 5 0.30 0.20 Load Regulation (%) Ishdn (μA) 80 0.30 VR = 0.8V VIN = 6.0V 0.15 VIN = 4.0V 0.10 VIN = 2.3V 0.05 105 130 VIN = 2.3V VOUT = 0.8V 0.20 0.10 0.00 -0.10 IOUT = 1 mA to 1500 mA -0.20 -0.30 0.00 -45 -20 5 30 55 80 105 -45 130 -20 5 ISHDN vs. Temperature. FIGURE 2-14: 30 0.00 105 130 IOUT = 1 mA to 1500 mA 0.08 IOUT = 1 mA IOUT = 1A IOUT = 100 mA IOUT = 500mA VOUT = 0.8V VIN = 2.3V to 6.0V 0.00 Load Regulation (%) -0.05 0.04 80 FIGURE 2-17: Load Regulation vs. Temperature (VOUT < 2.5V Fixed). 0.10 0.06 55 Temperature (°C) Temperature (°C) Line Regulation (%/V) 55 FIGURE 2-16: Line Regulation vs. Temperature (2.5V Fixed). Quiescent Current vs. 0.25 0.02 30 Temperature (°C) Temperature (°C) FIGURE 2-13: Temperature. IOUT = 500 mA 0.020 -0.10 VOUT = 2.5V -0.15 -0.20 -0.25 VOUT = 5.0V -0.30 -0.35 -0.40 -0.45 -45 -20 5 30 55 80 105 Temperature (°C) FIGURE 2-15: Line Regulation vs. Temperature (0.8V Fixed). © 2007 Microchip Technology Inc. 130 -45 -20 5 30 55 80 105 130 Temperature (°C) FIGURE 2-18: Load Regulation vs. Temperature (VOUT ≥ 2.5V Fixed). DS22001C-page 11 MCP1827/MCP1827S Note: Unless otherwise indicated, VOUT = 1.8V (Adjustable), VIN = 2.8V, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, RPWRGD = 10 kΩ To VIN. 0.40 VR=0.8V, VIN=2.3V VOUT = 2.5V 0.30 Noise (µV/ √Hz) Dropout Voltage (V) 10.000 Temperature = 25°C 0.35 0.25 VOUT = 5.0V 0.20 0.15 0.10 COUT=1 μF ceramic X7R CIN=10 μF ceramic 1.000 IOUT=200 mA VR=3.3V, VIN=4.1V 0.100 0.05 0.00 0 250 500 750 1000 1250 0.010 0.01 1500 0.1 Load Current (mA) FIGURE 2-19: Current. Dropout Voltage vs. Load 1000 0 IOUT = 1.5A -10 0.40 -20 0.35 VOUT = 5.0V 0.30 -45 -20 -30 -40 VR=1.2V Adj COUT=10 μF ceramic X7R VIN=3.1V CIN=0 μF IOUT=10 mA -50 -60 VOUT = 2.5V -70 0.25 5 30 55 80 105 -80 0.01 130 0.1 Temperature (°C) FIGURE 2-20: Temperature. Dropout Voltage vs. 1 10 Frequency (kHz) 100 1000 FIGURE 2-23: Power Supply Ripple Rejection (PSRR) vs. Frequency (VOUT = 1.2V Adj.). 0 3.00 -10 2.50 -20 PSRR (dB) Short Circuit Current (A) 100 FIGURE 2-22: Output Noise Voltage Density vs. Frequency. PSRR (dB) Dropout Voltage (V) 0.45 1 10 Frequency (kHz) 2.00 1.50 1.00 VOUT = 2.5V Temperature = 25°C 0.50 0.00 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage (V) FIGURE 2-21: Input Voltage. DS22001C-page 12 Short Circuit Current vs. -30 -40 VR=1.2V Adj COUT=22 μF ceramic X7R VIN=3.1V CIN=0 μF IOUT=10 mA -50 -60 -70 -80 0.01 0.1 1 10 Frequency (kHz) 100 1000 FIGURE 2-24: Power Supply Ripple Rejection (PSRR) vs. Frequency (VOUT = 1.2V Adj.). © 2007 Microchip Technology Inc. MCP1827/MCP1827S Note: Unless otherwise indicated, VOUT = 1.8V (Adjustable), VIN = 2.8V, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, RPWRGD = 10 kΩ To VIN. 0 -10 PSRR (dB) -20 -30 -40 VR=3.3V Fixed COUT=10 μF ceramic X7R VIN=3.9V CIN=0 μF IOUT=10 mA -50 -60 -70 -80 0.01 0.1 1 10 Frequency (kHz) 100 1000 FIGURE 2-25: Power Supply Ripple Rejection (PSRR) vs. Frequency (VOUT = 3.3V Fixed). FIGURE 2-28: Shutdown. 2.5V (Adj.) Startup from FIGURE 2-29: Timing. Power Good (PWRGD) FIGURE 2-30: (3.3V Fixed). Dynamic Line Response 0 -10 PSRR (dB) -20 -30 -40 VR=3.3V Fixed COUT=22 μF ceramic X7R VIN=3.9V CIN=0 μF IOUT=10 mA -50 -60 -70 -80 0.01 0.1 1 10 Frequency (kHz) 100 1000 FIGURE 2-26: Power Supply Ripple Rejection (PSRR) vs. Frequency (VOUT = 3.3V Fixed). FIGURE 2-27: 2.5V (Adj.) Startup from VIN. © 2007 Microchip Technology Inc. DS22001C-page 13 MCP1827/MCP1827S Note: Unless otherwise indicated, VOUT = 1.8V (Adjustable), VIN = 2.8V, COUT = 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), IOUT = 1 mA, Temperature = +25°C, VIN = VOUT + 0.6V, RPWRGD = 10 kΩ To VIN. FIGURE 2-31: Dynamic Load Response (3.3V Fixed, 10 mA to 1500 mA). DS22001C-page 14 FIGURE 2-32: Dynamic Load Response (3.3V Fixed, 100 mA to 1500 mA). © 2007 Microchip Technology Inc. MCP1827/MCP1827S 3.0 PIN DESCRIPTION The descriptions of the pins are listed in Table 3-1. TABLE 3-1: 3-Pin Fixed Output 3.1 PIN FUNCTION TABLE 5-Pin Fixed Output Adjustable Output Name Description Shutdown Control Input (active-low) — 1 1 SHDN 1 2 2 VIN 2 3 3 GND Ground Regulated Output Voltage 3 4 4 VOUT — 5 — PWRGD — — 5 ADJ Voltage Adjust/Sense Input Pad Pad Pad EP Exposed Pad of the Package (ground potential) Input Voltage Supply (VIN) Connect the unregulated or regulated input voltage source to VIN. If the input voltage source is located several inches away from the LDO, or the input source is a battery, it is recommended that an input capacitor be used. A typical input capacitance value of 1 µF to 10 µF should be sufficient for most applications. 3.2 Input Voltage Supply Shutdown Control Input (SHDN) Power Good Output 3.4 The PWRGD output is an open-drain output used to indicate when the LDO output voltage is within 92% (typically) of its nominal regulation value. The PWRGD threshold has a typical hysteresis value of 2%. The PWRGD output is delayed by 200 µs (typical) from the time the LDO output is within 92% + 3% (max hysteresis) of the regulated output value on power-up. This delay time is internally fixed. The SHDN input is used to turn the LDO output voltage on and off. When the SHDN input is at a logic-high level, the LDO output voltage is enabled. When the SHDN input is pulled to a logic-low level, the LDO output voltage is disabled. When the SHDN input is pulled low, the PWRGD output also goes low and the LDO enters a low quiescent current shutdown state where the typical quiescent current is 0.1 µA. 3.5 3.3 3.6 Ground (GND) Connect the GND pin of the LDO to a quiet circuit ground. This will help the LDO power supply rejection ratio and noise performance. The ground pin of the LDO only conducts the quiescent current of the LDO (typically 120 µA), so a heavy trace is not required. For applications have switching or noisy inputs tie the GND pin to the return of the output capacitor. Ground planes help lower inductance and voltage spikes caused by fast transient load currents and are recommended for applications that are subjected to fast load transients. © 2007 Microchip Technology Inc. Power Good Output (PWRGD) Output Voltage Adjust Input (ADJ) For adjustable applications, the output voltage is connected to the ADJ input through a resistor divider that sets the output voltage regulation value. This provides the user the capability to set the output voltage to any value they desire within the 0.8V to 5.0V range of the device. Regulated Output Voltage (VOUT) The VOUT pin is the regulated output voltage of the LDO. A minimum output capacitance of 1.0 µF is required for LDO stability. The MCP1827/MCP1827S is stable with ceramic, tantalum and aluminum-electrolytic capacitors. See Section 4.3 “Output Capacitor” for output capacitor selection guidance. 3.7 Exposed Pad (EP) The DDPAK and TO-220 package have an exposed tab on the package. A heat sink may be mount to the tab to aid in the removal of heat from the package during operation. The exposed tab is at the ground potential of the LDO. DS22001C-page 15 MCP1827/MCP1827S 4.0 DEVICE OVERVIEW EQUATION 4-2: The MCP1827/MCP1827S is a high output current, Low Dropout (LDO) voltage regulator. The low dropout voltage of 330 mV typical at 1.5A of current makes it ideal for battery-powered applications. Unlike other high output current LDOs, the MCP1827/MCP1827S only draws a maximum of 220 µA of quiescent current. The MCP1827 has a shutdown control input and a power good output. 4.1 The 5-pin MCP1827 LDO is available with either a fixed output voltage or an adjustable output voltage. The output voltage range is 0.8V to 5.0V for both versions. The 3-pin MCP1827S LDO is available as a fixed voltage device. 4.1.1 ADJUST INPUT The adjustable version of the MCP1827 uses the ADJ pin (pin 5) to get the output voltage feedback for output voltage regulation. This allows the user to set the output voltage of the device with two external resistors. The nominal voltage for ADJ is 0.41V. Figure 4-1 shows the adjustable version of the MCP1827. Resistors R1 and R2 form the resistor divider network necessary to set the output voltage. With this configuration, the equation for setting VOUT is: EQUATION 4-1: VOUT = LDO Output Voltage VADJ = ADJ Pin Voltage (typically 0.41V) MCP1827-ADJ VOUT On SHDN 1 R1 2 3 4 5 ADJ C2 1 µF VIN C1 4.7 µF GND R2 FIGURE 4-1: Typical adjustable output voltage application circuit. The allowable resistance value range for resistor R2 is from 10 kΩ to 200 kΩ. Solving the equation for R1 yields the following equation: DS22001C-page 16 = LDO Output Voltage VADJ = ADJ Pin Voltage (typically 0.41V) Output Current and Current Limiting The MCP1827/MCP1827S LDO is tested and ensured to supply a minimum of 1.5A of output current. The MCP1827/MCP1827S has no minimum output load, so the output load current can go to 0 mA and the LDO will continue to regulate the output voltage to within tolerance. The MCP1827/MCP1827S also incorporates an output current limit. If the output voltage falls below 0.7V due to an overload condition (usually represents a shorted load condition), the output current is limited to 2.2A (typical). If the overload condition is a soft overload, the MCP1827/MCP1827S will supply higher load currents of up to 3A. The MCP1827/MCP1827S should not be operated in this condition continuously as it may result in failure of the device. However, this does allow for device usage in applications that have higher pulsed load currents having an average output current value of 1.5A or less. 4.3 Off VOUT Output overload conditions may also result in an over-temperature shutdown of the device. If the junction temperature rises above 150°C, the LDO will shut down the output voltage. See Section 4.8 “Overtemperature Protection” for more information on overtemperature shutdown. R1 + R2 V OUT = V ADJ ⎛ ------------------⎞ ⎝ R2 ⎠ Where: Where: 4.2 LDO Output Voltage V OUT – V ADJ R 1 = R 2 ⎛ --------------------------------⎞ ⎝ ⎠ V ADJ Output Capacitor The MCP1827/MCP1827S requires a minimum output capacitance of 1 µF for output voltage stability. Ceramic capacitors are recommended because of their size, cost and environmental robustness qualities. Aluminum-electrolytic and tantalum capacitors can be used on the LDO output as well. The Equivalent Series Resistance (ESR) of the electrolytic output capacitor must be no greater than 1 ohm. The output capacitor should be located as close to the LDO output as is practical. Ceramic materials X7R and X5R have low temperature coefficients and are well within the acceptable ESR range required. A typical 1 µF X7R 0805 capacitor has an ESR of 50 milli-ohms. Larger LDO output capacitors can be used with the MCP1827/MCP1827S 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. © 2007 Microchip Technology Inc. MCP1827/MCP1827S 4.4 Input Capacitor Low input source impedance is necessary for the LDO output to operate properly. When operating from batteries, or in applications with long lead length (> 10 inches) between the input source and the LDO, some input capacitance is recommended. A minimum of 1.0 µF to 4.7 µF is recommended for most applications. For applications that have output step load requirements, the input capacitance of the LDO is very important. The input capacitance provides the LDO with a good local low-impedance source to pull the transient currents from in order to respond quickly to the output load step. For good step response performance, the input capacitor should be of equivalent (or higher) value than the output capacitor. The capacitor should be placed as close to the input of the LDO as is practical. Larger input capacitors will also help reduce any high-frequency noise on the input and output of the LDO and reduce the effects of any inductance that exists between the input source voltage and the input capacitance of the LDO. 4.5 Power Good Output (PWRGD) The 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 PWRGD output will be held low until the output voltage has exceeded the power good threshold plus the hysteresis value. Once this threshold has been exceeded, the power good time delay is started (shown as TPG in the Electrical Characteristics table). The power good time delay is fixed at 200 µs (typical). After the time delay period, the PWRGD output will go high, indicating that the output voltage is stable and within regulation limits. VPWRGD_TH VOUT TPG VOH TVDET_PWRGD PWRGD VOL FIGURE 4-2: VIN Power Good Timing. TOR 30 µs 70 µs TPG SHDN VOUT PWRGD FIGURE 4-3: Shutdown. Power Good Timing from If the output voltage of the LDO falls below the power good threshold, the power good output will transition low. The power good circuitry has a 170 µs delay when detecting a falling output voltage, which helps to increase noise immunity of the power good output and avoid false triggering of the power good output during fast output transients. See Figure 4-2 for power good timing characteristics. 4.6 When the LDO is put into Shutdown mode using the SHDN input, the power good output is pulled low immediately, indicating that the output voltage will be out of regulation. The timing diagram for the power good output when using the shutdown input is shown in Figure 4-3. The SHDN input will ignore low-going pulses (pulses meant to shut down the LDO) that are up to 400 ns in pulse width. If the shutdown input is pulled low for more than 400 ns, the LDO will enter Shutdown mode. This small bit of filtering helps to reject any system noise spikes on the shutdown input signal. The power good output is an open-drain output that can be pulled up to any voltage that is equal to or less than the LDO input voltage. This output is capable of sinking 1.2 mA (VPWRGD < 0.4V maximum). On the rising edge of the SHDN input, the shutdown circuitry has a 30 µs delay before allowing the LDO output to turn on. This delay helps to reject any false turn-on signals or noise on the SHDN input signal. After © 2007 Microchip Technology Inc. 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. DS22001C-page 17 MCP1827/MCP1827S the 30 µs delay, the LDO output enters its soft-start period as it rises from 0V to its final regulation value. If the SHDN input signal is pulled low during the 30 µs delay period, the timer will be reset and the delay time will start over again on the next rising edge of the SHDN input. The total time from the SHDN input going high (turn-on) to the LDO output being in regulation is typically 100 µs. See Figure 4-4 for a timing diagram of the SHDN input. TOR 400 ns (typ) 30 µs 70 µs SHDN 4.8 Overtemperature Protection The MCP1827/MCP1827S 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. If the internal power dissipation continues to be excessive, the device will again shut off. The junction temperature of the die is a function of power dissipation, ambient temperature and package thermal resistance. See Section 5.0 “Application Circuits/Issues” for more information on LDO power dissipation and junction temperature. VOUT FIGURE 4-4: Diagram. 4.7 Shutdown Input Timing Dropout Voltage and Undervoltage Lockout Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below the nominal value that was measured with a + 0.6V differential applied. The VR MCP1827/MCP1827S LDO has a very low dropout voltage specification of 330 mV (typical) at 1.5A of output current. See Section 1.0 “Electrical Characteristics” for maximum dropout voltage specifications. The MCP1827/MCP1827S LDO operates across an input voltage range of 2.3V to 6.0V and incorporates input Undervoltage Lockout (UVLO) circuitry that keeps the LDO output voltage off until the input voltage reaches a minimum of 2.18V (typical) on the rising edge of the input voltage. As the input voltage falls, the LDO output will remain on until the input voltage level reaches 2.04V (typical). Since the MCP1827/MCP1827S LDO undervoltage lockout activates at 2.04V as the input voltage is falling, the dropout voltage specification does not apply for output voltages that are less than 1.9V. For high-current applications, voltage drops across the PCB traces must be taken into account. The trace resistances can cause significant voltage drops between the input voltage source and the LDO. For applications with input voltages near 2.3V, these PCB trace voltage drops can sometimes lower the input voltage enough to trigger a shutdown due to undervoltage lockout. DS22001C-page 18 © 2007 Microchip Technology Inc. MCP1827/MCP1827S 5.0 APPLICATION CIRCUITS/ISSUES 5.1 Typical Application The MCP1827/MCP1827S is used for applications that require high LDO output current and a power good output. In addition to the LDO pass element power dissipation, there is power dissipation within the MCP1827/MCP1827S 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: EQUATION 5-2: P I ( GND ) = V IN ( MAX ) × I VIN VOUT = 2.5V @ 1.5A MCP1827-2.5 On Off 1 2 3 4 5 SHDN R1 10 kΩ C2 10 µF VIN 3.3V C1 4.7 µF GND FIGURE 5-1: 5.1.1 Typical Application Circuit. APPLICATION CONDITIONS Package Type = TO-220-5 VIN maximum = 3.465V VIN minimum = 3.135V VDROPOUT (max) = 0.550V VOUT (typical) = 2.5V IOUT = 1.5A maximum PDISS (typical) = 1.2W Temperature Rise = 35.2°C Power Calculations 5.2.1 PI(GND = Power dissipation due to the quiescent current of the LDO VIN(MAX) = Maximum input voltage IVIN = Current flowing in the VIN pin with no LDO output current (LDO quiescent current) PWRGD Input Voltage Range = 3.3V ± 5% 5.2 Where: POWER DISSIPATION The internal power dissipation within the MCP1827/MCP1827S is a function of input voltage, output voltage, output current and quiescent current. Equation 5-1 can be used to calculate the internal power dissipation for the LDO. The total power dissipated within the MCP1827/MCP1827S is the sum of the power dissipated in the LDO pass device and the P(IGND) term. Because of the CMOS construction, the typical IGND for the MCP1827/MCP1827S is 120 µA. Operating at a maximum of 3.465V results in a power dissipation of 0.49 milli-Watts. For most applications, this is small compared to the LDO pass device power dissipation and can be neglected. The maximum continuous operating junction temperature specified for the MCP1827/MCP1827S is +125°C. To estimate the internal junction temperature of the MCP1827/MCP1827S, the total internal power dissipation is multiplied by the thermal resistance from junction to ambient (RθJA) of the device. The thermal resistance from junction to ambient for the TO-220-5 package is estimated at 29.3° C/W. EQUATION 5-3: T J ( MAX ) = P TOTAL × Rθ JA + T AMAX TJ(MAX) = Maximum continuous junction temperature PTOTAL = Total device power dissipation RθJA = Thermal resistance from junction to ambient EQUATION 5-1: P LDO = ( V IN ( MAX ) ) – V OUT ( MIN ) ) × I OUT ( MAX ) ) TAMAX = Maximum ambient temperature Where: PLDO = LDO Pass device internal power dissipation VIN(MAX) = Maximum input voltage VOUT(MIN) = LDO minimum output voltage © 2007 Microchip Technology Inc. DS22001C-page 19 MCP1827/MCP1827S The maximum power dissipation capability for a package can be calculated given the junction-to-ambient thermal resistance and the maximum ambient temperature for the application. Equation 5-4 can be used to determine the package maximum internal power dissipation. EQUATION 5-4: P D ( MAX ) ( T J ( MAX ) – T A ( MAX ) ) = --------------------------------------------------Rθ JA PD(MAX) = Maximum device power dissipation TJ(MAX) = maximum continuous junction temperature TA(MAX) = maximum ambient temperature 5.3 Typical Application Internal power dissipation, junction temperature rise, junction temperature and maximum power dissipation is calculated in the following example. The power dissipation as a result of ground current is small enough to be neglected. 5.3.1 POWER DISSIPATION EXAMPLE Package Package Type = TO-220-5 Input Voltage VIN = 3.3V ± 5% LDO Output Voltage and Current VOUT = 2.5V RθJA = Thermal resistance from junction to ambient IOUT = 1.5A Maximum Ambient Temperature EQUATION 5-5: T J ( RISE ) = P D ( MAX ) × Rθ JA TA(MAX) = 60°C Internal Power Dissipation PLDO(MAX) = (VIN(MAX) – VOUT(MIN)) x IOUT(MAX) TJ(RISE) = Rise in device junction temperature over the ambient temperature PLDO = ((3.3V x 1.05) – (2.5V x 0.975)) x 1.5A PD(MAX) = Maximum device power dissipation PLDO = 1.54 Watts RθJA = Thermal resistance from junction to ambient EQUATION 5-6: T J = T J ( RISE ) + T A TJ = Junction temperature TJ(RISE) = Rise in device junction temperature over the ambient temperature TA = Ambient temperature 5.3.1.1 Device Junction Temperature Rise The internal junction temperature rise is a function of internal power dissipation and the thermal resistance from junction-to-ambient for the application. The thermal resistance from junction-to-ambient (RθJA) is derived from EIA/JEDEC standards for measuring thermal resistance. The EIA/JEDEC specification is JESD51. The standard describes the test method and board specifications for measuring the thermal resistance from junction to ambient. The actual thermal resistance for a particular application can vary depending on many factors such as copper area and thickness. Refer to AN792, “A Method to Determine How Much Power a SOT23 Can Dissipate in an Application” (DS00792), for more information regarding this subject. TJ(RISE) = PTOTAL x RθJA TJRISE = 1.54 W x 29.3° C/W TJRISE = 45.12°C DS22001C-page 20 © 2007 Microchip Technology Inc. MCP1827/MCP1827S 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 = TJRISE + TA(MAX) TJ = 45.12°C + 60.0°C TJ = 105.12°C As you can see from the result, this application will be operating within the maximum operating junction temperature of 125°C. 5.3.1.3 Maximum Package Power Dissipation at 60°C Ambient Temperature TO-220-5 (29.3° C/W RθJA): PD(MAX) = (125°C – 60°C) / 29.3° C/W PD(MAX) = 2.218W DDPAK-5 (31.2°C/Watt RθJA): PD(MAX) = (125°C – 60°C)/ 31.2° C/W PD(MAX) = 2.083W From this table you can see the difference in maximum allowable power dissipation between the TO-220-5 package and the DDPAK-5 package. © 2007 Microchip Technology Inc. DS22001C-page 21 MCP1827/MCP1827S 6.0 PACKAGING INFORMATION 6.1 Package Marking Information 3-Lead DDPAK (MCP1827S) XXXXXXXXX XXXXXXXXX YYWWNNN 1 2 Example: MCP1827S e3 0.8EEB^^ 0630256 3 1 2 3 3-Lead TO-220 (MCP1827S) Example: XXXXXXXXX XXXXXXXXX YYWWNNN MCP1827S 12EAB^^ e3 0630256 1 1 2 3 5-Lead DDPAK (Fixed) (MCP1827) 2 3 Example: XXXXXXXXX XXXXXXXXX YYWWNNN MCP1827 e3 1.0EET^^ 0630256 1 2 3 4 5 1 2 3 4 5 5-Lead TO-220 (Adj) (MCP1827) Example: XXXXXXXXX XXXXXXXXX YYWWNNN MCP1827 08EAT^^ e3 0630256 1 2 3 4 5 1 2 3 4 5 Legend: XX...X Y YY WW NNN e3 * Note: DS22001C-page 22 Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. © 2007 Microchip Technology Inc. MCP1827/MCP1827S 3-Lead Plastic (EB) [DDPAK] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging E E1 L1 D1 D H 1 N b e BOTTOM VIEW TOP VIEW b1 CHAMFER OPTIONAL A C2 φ c A1 L Units Dimension Limits Number of Pins INCHES MIN N NOM MAX 3 Pitch e Overall Height A .160 .100 BSC – .190 Standoff § A1 .000 – .010 Overall Width E .380 – .420 Exposed Pad Width E1 .245 – – Molded Package Length D .330 – .380 Overall Length H .549 – .625 Exposed Pad Length D1 .270 – – Lead Thickness c .014 – .029 Pad Thickness C2 .045 – .065 Lower Lead Width b .020 – .039 Upper Lead Width b1 .045 – .070 Foot Length L .068 – .110 Pad Length L1 – – .067 Foot Angle φ 0° – 8° Notes: 1. § Significant Characteristic. 2. Dimensions D and E do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .005" per side. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Microchip Technology Drawing C04-011B © 2007 Microchip Technology Inc. DS22001C-page 23 MCP1827/MCP1827S 3-Lead Plastic Transistor Outline (AB) [TO-220] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging CHAMFER OPTIONAL φP E A A1 Q H1 D D1 L1 L b2 1 2 N b c e A2 e1 Units Dimension Limits Number of Pins INCHES MIN N NOM MAX 3 Pitch e .100 BSC Overall Pin Pitch e1 .200 BSC Overall Height A .140 – .190 Tab Thickness A1 .020 – .055 Base to Lead A2 .080 – .115 Overall Width E .357 – .420 Mounting Hole Center Q .100 – .120 Overall Length D .560 – .650 Molded Package Length D1 .330 – .355 Tab Length H1 .230 – .270 Mounting Hole Diameter .156 φP .139 – Lead Length L .500 – .580 Lead Shoulder L1 – – .250 Lead Thickness c .012 – .024 Lead Width b .015 .027 .040 Shoulder Width b2 .045 .057 .070 Notes: 1. Dimensions D and E do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .005" per side. 2. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Microchip Technology Drawing C04-034B DS22001C-page 24 © 2007 Microchip Technology Inc. MCP1827/MCP1827S 5-Lead Plastic (ET) [DDPAK] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging E E1 L1 D1 D H 1 N b BOTTOM VIEW e TOP VIEW CHAMFER OPTIONAL C2 A φ c A1 L Units Dimension Limits Number of Pins INCHES MIN N NOM MAX 5 Pitch e Overall Height A .160 – .190 Standoff § A1 .000 – .010 Overall Width E .380 – .420 Exposed Pad Width E1 .245 – – Molded Package Length D .330 – .380 Overall Length H .549 – .625 Exposed Pad Length D1 .270 – – Lead Thickness c .014 – .029 Pad Thickness C2 .045 – .065 b .020 – .039 Foot Length L .068 – .110 Pad Length L1 – – .067 Lead Width .067 BSC Foot Angle φ 0° – 8° Notes: 1. § Significant Characteristic. 2. Dimensions D and E do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .005" per side. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Microchip Technology Drawing C04-012B © 2007 Microchip Technology Inc. DS22001C-page 25 MCP1827/MCP1827S 5-Lead Plastic Transistor Outline (AT) [TO-220] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging A E φP CHAMFER OPTIONAL A1 Q H1 D D1 L 1 N 2 3 e b e1 c A2 Units Dimension Limits Number of Pins INCHES MIN N NOM MAX 5 Pitch e .067 BSC Overall Pin Pitch e1 .268 BSC Overall Height A .140 – .190 Overall Width E .380 – .420 Overall Length D .560 – .650 Molded Package Length D1 .330 – .355 Tab Length H1 .204 – .293 Tab Thickness A1 .020 – .055 Mounting Hole Center Q .100 – .120 Mounting Hole Diameter φP .139 – .156 L .482 – .590 A2 .080 – .115 c .012 – .025 Lead Length Base to Bottom of Lead Lead Thickness Lead Width b .015 .027 .040 Notes: 1. Dimensions D and E do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .005" per side. 2. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Microchip Technology Drawing C04-036B DS22001C-page 26 © 2007 Microchip Technology Inc. MCP1827/MCP1827S APPENDIX A: REVISION HISTORY Revision C (February 2007) • Figure 2-22: Revised label on Y-axis. • Section 2.0 “Typical Performance Curves”: Added note on Junction Temperature. • Pages 9-14: Revised notes. Revision B (September 2006) • Correction to maximum Dropout Voltage in Section 1.0. • Added additional graphs in Section 2.0. • Added disclaimer to package outline drawings. Revision A (July 2006) • Original Release of this Document. © 2007 Microchip Technology Inc. DS22001C-page 27 MCP1827/MCP1827S NOTES: DS22001C-page 28 © 2007 Microchip Technology Inc. MCP1827/MCP1827S 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: MCP1827: 1.5A Low Dropout Regulator MCP1827T: 1.5A Low Dropout Regulator Tape and Reel MCP1827S: 1.5A Low Dropout Regulator MCP1827ST: 1.5A Low Dropout Regulator Tape and Reel Examples: a) b) c) d) e) f) Output Voltage *: 08 12 18 25 30 33 50 = = = = = = = 0.8V “Standard” 1.2V “Standard” 1.8V “Standard” 2.5V “Standard” 3.0V “Standard” 3.3V “Standard” 5.0V “Standard” g) h) i) *Contact factory for other output voltage options Extra Feature Code: 0 = Fixed Tolerance: 2 = 2.0% (Standard) Temperature: E = -40°C to +125°C c) Package Type: AB AT EB ET = = = = d) a) Plastic Transistor Outline, TO-220, 3-lead Plastic Transistor Outline, TO-220, 5-lead Plastic, DDPAK, 3-lead Plastic, DDPAK, 5-lead b) e) f) g) h) i) j) © 2007 Microchip Technology Inc. MCP1827-0802E/AT: 0.8V LDO Regulator 5LD TO-220 MCP1827-1002E/ET: 1.0V LDO Regulator 5LD DDPAK MCP1827-1202E/AT: 1.2V LDO Regulator 5LD TO-220 MCP1827-1802E/AT: 1.8V LDO Regulator 5LD TO-220 MCP1827-2502E/ET: 2.5V LDO Regulator 5LD DDPAK MCP1827-3002E/ET: 3.0V LDO Regulator 5LD DDPAK MCP1827-3302E/AT 3.3V LDO Regulator 5LD TO-220 MCP1827-5002E/ET: 5.0V LDO Regulator 5LD DDPAK MCP1827-ADJE/AT: ADJ LDO Regulator 5LD TO-220 MCP1827S-0802E/EB:0.8V LDO Regulator 3LD DDPAK MCP1827S-0802E/AB:0.8V LDO Regulator 3LD TO-220 MCP1827S-1002E/EB:1.0V LDO Regulator 3LD DDPAK MCP1827S-1202E/AB 1.2V LDO Regulator 3LD TO-220 MCP1827S-1802E/EB 1.8V LDO Regulator 3LD DDPAK MCP1827S-2502E/EB 2.5V LDO Regulator 3LD DDPAK MCP1827S-2502E/EB 3.0V LDO Regulator 3LD DDPAK MCP1827S-3302E/AB 3.3V LDO Regulator 3LD TO-220 MCP1827S-5002E/EB 5.0V LDO Regulator 3LD DDPAK MCP1827S-ADJE/AB ADJ LDO Regulator 3LD TO-220 DS22001C-page 29 MCP1827/MCP1827S NOTES: DS22001C-page 30 © 2007 Microchip Technology Inc. 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Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. AmpLab, FilterLab, Linear Active Thermistor, Migratable Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2007, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona, Gresham, Oregon and Mountain View, California. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. © 2007 Microchip Technology Inc. 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