SLAA414A July   2009  – August 2017 LFC789D25 , LM1086 , LM1086-MIL , LM1117 , LM237 , LM317 , LM317L , LM317L-N , LM317M , LM317MQ , LM337 , LMS1585A , LMS1587 , LP2950 , LP2951 , LP2981 , LP2981A , LP2985 , MC79L , REG101 , REG102 , REG103 , REG104 , REG1117 , REG1117A , REG1118 , REG113 , SM72238 , SN105125 , TL1963A , TL317 , TL5209 , TL720M05-Q1 , TL750L , TL750M , TL750M-Q1 , TL751L , TL760M33-Q1 , TL780 , TL783 , TLE4275-Q1 , TLV1117 , TLV1117LV , TLV700-Q1 , TLV70012-Q1 , TPPM0110 , TPPM0111 , TPPM0301 , TPPM0302 , TPPM0303 , TPS51100 , TPS51103 , TPS51200 , TPS61100 , TPS61107 , TPS61120 , TPS61121 , TPS61122 , TPS65020 , TPS65021 , TPS65022 , TPS650231 , TPS65023B , TPS65050 , TPS657052 , TPS65708 , TPS657095 , TPS701 , TPS70175-Q1 , TPS702 , TPS703 , TPS70345-EP , TPS704 , TPS707 , TPS70751-EP , TPS708 , TPS71 , TPS71025 , TPS712 , TPS71202-EP , TPS713 , TPS715 , TPS715-Q1 , TPS71501-EP , TPS715A , TPS715A-NM , TPS718 , TPS719 , TPS71H01 , TPS72 , TPS720 , TPS721 , TPS72118-EP , TPS722 , TPS723 , TPS725 , TPS726 , TPS727 , TPS728 , TPS73 , TPS730 , TPS731 , TPS73101-EP , TPS731125-EP , TPS73115-EP , TPS73118-EP , TPS73125-EP , TPS73130-EP , TPS73132-EP , TPS73133-EP , TPS73150-EP , TPS732 , TPS732-Q1 , TPS73201-EP , TPS73215-EP , TPS73216-EP , TPS73218-EP , TPS73225-EP , TPS73230-EP , TPS73233-EP , TPS73250-EP , TPS734 , TPS735 , TPS736 , TPS73601-EP , TPS73615-EP , TPS73618-EP , TPS73625-EP , TPS73630-EP , TPS73632-EP , TPS73633-EP , TPS737 , TPS737-Q1 , TPS73HD3 , TPS74 , TPS74201 , TPS74301 , TPS74401 , TPS74701 , TPS74801 , TPS74901 , TPS751 , TPS75103 , TPS75105 , TPS75125-EP , TPS752 , TPS752-Q1 , TPS75201-EP , TPS75201M-EP , TPS75215-EP , TPS75218-EP , TPS75225-EP , TPS75233-EP , TPS753 , TPS75301-EP , TPS75318-EP , TPS75325-EP , TPS75333-EP , TPS754 , TPS755 , TPS756 , TPS757 , TPS758 , TPS759 , TPS760 , TPS76201 , TPS763-Q1 , TPS766 , TPS767 , TPS767-Q1 , TPS76701-EP , TPS76715-EP , TPS76718-EP , TPS76725-EP , TPS76733-EP , TPS767D3 , TPS767D3-Q1 , TPS767D301-EP , TPS768 , TPS768-Q1 , TPS76801-EP , TPS76815-EP , TPS76818-EP , TPS76825-EP , TPS76833-EP , TPS76850-EP , TPS769 , TPS769-Q1 , TPS76901-HT , TPS770 , TPS77101-Q1 , TPS773 , TPS774 , TPS77401-EP , TPS775 , TPS775-Q1 , TPS77501-EP , TPS77515-EP , TPS77518-EP , TPS77525-EP , TPS77533-EP , TPS776 , TPS776-Q1 , TPS77601-EP , TPS77615-EP , TPS77618-EP , TPS77625-EP , TPS77633-EP , TPS777 , TPS778 , TPS779 , TPS780 , TPS781 , TPS782 , TPS786 , TPS789 , TPS790 , TPS791-Q1 , TPS79101-EP , TPS79133-EP , TPS79147-EP , TPS793-Q1 , TPS79301-EP , TPS79318-EP , TPS79333-EP , TPS793475-EP , TPS794 , TPS797 , TPS797-Q1 , TPS79718-EP , TPS79730-EP , TPS799 , TPS799-Q1 , TPS7A45 , UA723 , UA78 , UA78L , UA78M , UA78M-Q1 , UA79 , UA79M , UC1832 , UC1832-SP , UC1834 , UC1834-SP , UC1836 , UC282 , UC2832 , UC2832-EP , UC2833 , UC2834 , UC2834M , UC2835 , UC2836 , UC285 , UC382 , UC3832 , UC3833 , UC3834 , UC3836 , UC385 , UCC281 , UCC283 , UCC2837 , UCC284 , UCC381 , UCC383 , UCC384

 

  1.   LDO PSRR Measurement Simplified
    1.     Trademarks
    2. 1 What is PSRR?
    3. 2 Measuring PSRR of LDO
    4. 3 Measuring PSRR Using Oscilloscope
    5. 4 Implications of the LDO Noise
  2.   Revision History

LDO PSRR Measurement Simplified

This application report explains different methods of measuring the Power Supply Rejection Ratio (PSRR) of a Low-Dropout (LDO) regulator and includes the pros and cons of these measuring methods.