MCP1726 Data Sheet - Microchip Technology

1 MCP1726 . 1A, Low-Voltage, Low Quiescent Current LDO Regulator Features: Description: 1A Output Current Capability The MCP1726 is a 1A Low Dropout (LDO) linear Input Operating Voltage Range: to regulator that provides high current and low output Adjustable Output Voltage Range: to voltages in a very small package. The MCP1726 . comes in fixed or adjustable output voltage versions, Standard Fixed Output Voltages: with an output voltage range of to The 1A. - , , , , , , output current capability and low output voltage Low Dropout Voltage: 220 mV typical at 1A capability make the MCP1726 a good choice for new Typical Output Voltage Tolerance: output voltage LDO applications that have Stable with F Ceramic Output Capacitor high current demands. Fast Response to Load Transients The MCP1726 is stable using ceramic output Low Supply Current: 140 A (typical) capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator Low Shutdown Supply Current: A (typical).

2 Solution. Only 1 F of output capacitance is needed to Adjustable Delay on Power Good Output stabilize the LDO. Short-Circuit Current Limiting and Using CMOS construction, the quiescent current Overtemperature Protection consumed by the MCP1726 is typically less than 3x3 DFN-8 and SOIC-8 Package Options 140 A over the entire input voltage range, making it attractive for portable computing applications that Applications: demand high output current. When the MCP1726 is shut down, the quiescent current is reduced to less High-Speed Driver Chipset Power than A. Networking Backplane Cards The scaled-down output voltage is internally monitored Notebook Computers and a Power Good (PWRGD) output is provided when Network Interface Cards the output is within 92% of regulation (typical). An Palmtop Computers external capacitor can be used on the CDELAY pin to to Regulators adjust the delay from 1 ms to 300 ms.

3 The overtemperature and short-circuit current limiting provide additional protection for the LDO during system fault conditions. Package Types MCP1726 -ADJ MCP1726 -xx MCP1726 -ADJ MCP1726 -xx SOIC SOIC 3x3 DFN 3x3 DFN. VIN 1 8 VOUT VIN 1 8 VOUT VIN 1 8 VOUT VIN 1 8 VOUT. VIN 2 7 ADJ VIN 2 7 VOUT VIN 2 EP 7 ADJ VIN 2 EP 7 VOUT. SHDN 3 6 CDELAY SHDN 3 6 CDELAY SHDN 3 9 9. 6 CDELAY SHDN 3 6 CDELAY. GND 4 5 PWRGD GND 4 5 PWRGD GND 4 5 PWRGD GND 4 5 PWRGD. 2005-2014 Microchip Technology Inc. DS20001936D-page 1. MCP1726 . Typical Application MCP1726 Fixed Output Voltage VIN = to VOUT = @ 1A. 1 VIN VOUT 8. 2 VIN VOUT 7. C1 C2. F 1 F. 3 SHDN CDELAY 6. R1. 4 GND PWRGD 5 100 k . C3. On 1000 pF. Off PWRGD. MCP1726 Adjustable Output Voltage VIN = to VOUT = @ 1A. 1 VIN VOUT 8. R1. 2 VIN ADJ 7 40 k . C1 C2. F 1 F. 3 SHDN CDELAY 6.

4 R3. 4 GND PWRGD 5 100 k . On C3 R2. Off 1000 pF 20 k . PWRGD. DS20001936D-page 2 2005-2014 Microchip Technology Inc. MCP1726 . Functional Block Diagram PMOS. VIN VOUT. Undervoltage Lockout (UVLO). ISNS Cf Rf SHDN ADJ. Driver w/ Limit +. and SHDN EA. Overtemperature Sensing . SHDN. VREF. VIN. SHDN Reference Soft-Start PWRGD. Comp TDELAY. GND. 92% of VREF. CDELAY. 2005-2014 Microchip Technology Inc. DS20001936D-page 3. MCP1726 . ELECTRICAL Notice: Stresses above those listed under Maximum Ratings may cause permanent damage to the device. This is CHARACTERISTICS a stress rating only and functional operation of the device at those or any other conditions above those indicated in the Absolute Maximum Ratings operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods VIN.

5 May affect device reliability. Maximum Voltage on Any Pin .. (GND ) to (VDD + )V. Maximum Junction Temperature, TJ .. +150 C. Maximum Power Dissipation .. Internally-Limited (Note 6). Storage C to +150 C. DC CHARACTERISTICS. Electrical Specifications: Unless otherwise noted, VIN = (VR + ) or , whichever is greater, IOUT = 1 mA, CIN = COUT = F (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 Conditions Input Operating Voltage VIN V Note 1. Input Quiescent Current Iq 140 220 A IL = 0 mA, VIN = VR + , VOUT = to Input Quiescent Current for ISHDN 3 A SHDN = GND. SHDN Mode Maximum Output Current IOUT 1 A VIN = to (Note 1). Line Regulation VOUT/ %/V (VR + )V VIN 6V. (VOUT x VIN). Load Regulation VOUT/VOUT % IOUT = 1 mA to 1A, VIN = (VR + )V (Note 4).

6 Output Short-Circuit Current IOUT_SC A VIN = (VR + )V, RLOAD < , Peak Current Adjust Pin Characteristics Adjust Pin Reference Voltage VADJ V VIN = to VIN = , IOUT = 1 mA. Adjust Pin Leakage Current IADJ -10 +10 nA VIN = , VADJ = 0V to 6V. Adjust Temperature Coefficient TCVOUT 40 ppm/ C Note 3. Fixed-Output Characteristics Voltage Regulation VOUT VR VR VR + V Note 2. Dropout Characteristics Dropout Voltage VIN VOUT 220 500 mV IOUT = 1A, VIN(MIN) = (Note 5). Note 1: The minimum VIN must meet two conditions: VIN and VIN VR + VDROPOUT. 2: VR is the nominal regulator output voltage for the fixed cases. VR = , , etc. VR is the desired set point output voltage for the adjustable cases. VR = VADJ x ((R1/R2) + 1). See Figure 4-1. 3: TCVOUT = (VOUT-HIGH VOUT-LOW) x 106/(VR x Temperature). VOUT-HIGH is the highest voltage measured over the temperature range.

7 VOUT-LOW is the lowest voltage measured over the temperature range. 4: 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. 5: 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 = VR + 6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. ( , TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum 150 C rating. Sustained junction temperatures above 125 C can impact device reliability.

8 7: 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. DS20001936D-page 4 2005-2014 Microchip Technology Inc. MCP1726 . DC CHARACTERISTICS (CONTINUED). Electrical Specifications: Unless otherwise noted, VIN = (VR + ) or , whichever is greater, IOUT = 1 mA, CIN = COUT = F (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 Conditions Power Good Characteristics Input Voltage Operating Range VPWRGD_VIN V TA = +25 C. for Valid PWRGD. TA = -40 C to +125 C. ISINK = 100 A. PWRGD Threshold Voltage PWRGD_THF 88 92 96 % VOUT < , Falling Edge (Referenced to VOUT).

9 89 92 95 % VOUT > , Falling Edge PWRGD_THR 89 94 98 % VOUT < , Rising Edge 90 93 96 % VOUT > , Rising Edge PWRGD Output Voltage Low VPWRGD_L V IPWRGD SINK = mA. PWRGD Leakage PWRGD_LK A VPWRGD = VIN = PWRGD Time Delay TPG 200 s CDELAY = OPEN. 10 30 55 ms CDELAY = F. 300 ms CDELAY = F. Detect Threshold to PWRGD TVDET-PWRGD 170 s Active Time Delay Shutdown Input Logic-High Input VSHDN-HIGH 45 %VIN VIN = to Logic-Low Input VSHDN-LOW 15 %VIN VIN = to SHDN Input Leakage Current SHDNILK + A VIN = 6V, SHDN = VIN, SHDN = GND. AC Performance Output Delay from SHDN TOR 100 s SHDN = GND to VIN. VOUT = GND to 95% VR. Output Noise eN V/ Hz IOUT = 200 mA, f = 1 kHz, COUT = 1 F (X7R Ceramic), VOUT = Power Supply Ripple Rejection PSRR 54 dB f = 100 Hz, COUT = 10 F, Ratio IOUT = 100 mA, VINAC = 30 mV pk-pk, CIN = 0 F. Thermal Shutdown Temperature TSD 150 C IOUT = 100 A, VOUT = , VIN = Thermal Shutdown Hysteresis TSD 10 C IOUT = 100 A, VOUT = , VIN = Note 1: The minimum VIN must meet two conditions: VIN and VIN VR + VDROPOUT.

10 2: VR is the nominal regulator output voltage for the fixed cases. VR = , , etc. VR is the desired set point output voltage for the adjustable cases. VR = VADJ x ((R1/R2) + 1). See Figure 4-1. 3: TCVOUT = (VOUT-HIGH VOUT-LOW) x 106/(VR x Temperature). VOUT-HIGH is the highest voltage measured over the temperature range. VOUT-LOW is the lowest voltage measured over the temperature range. 4: 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. 5: 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 = VR + 6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air.