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LT3042 - 20V, 200mA, Ultralow Noise, Ultrahigh PSRR RF ...

LT304213042fbFor more information APPLICATION FEATURESDESCRIPTION20V, 200ma , Ultralow noise , Ultrahigh PSRR RF linear RegulatorThe LT 3042 is a high performance low dropout linear regulator featuring LTC s Ultralow noise and Ultrahigh PSRR architecture for powering noise sensitive RF applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3042 can be easily paralleled to further reduce noise , increase output current and spread heat on the device supplies 200ma at a typical 350mV dropout voltage. Operating quiescent current is nominally 2mA and drops to <<1 A in shutdown. The LT3042 s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise , PSRR, bandwidth and load regulation, independent of the programmed output voltage.

20V, 200mA, Ultralow Noise, Ultrahigh PSRR RF Linear Regulator The LT®3042 is a high performance low dropout linear regulator featuring LTC’ s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive RF applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3042 can be ...

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  Linear, Noise, Ultralow, Regulators, 200ma, Rsrp, Ultralow noise, Ultrahigh, Ultrahigh psrr, Ultrahigh psrr rf linear regulator, Ultrahigh psrr rf

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Transcription of LT3042 - 20V, 200mA, Ultralow Noise, Ultrahigh PSRR RF ...

1 LT304213042fbFor more information APPLICATION FEATURESDESCRIPTION20V, 200ma , Ultralow noise , Ultrahigh PSRR RF linear RegulatorThe LT 3042 is a high performance low dropout linear regulator featuring LTC s Ultralow noise and Ultrahigh PSRR architecture for powering noise sensitive RF applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3042 can be easily paralleled to further reduce noise , increase output current and spread heat on the device supplies 200ma at a typical 350mV dropout voltage. Operating quiescent current is nominally 2mA and drops to <<1 A in shutdown. The LT3042 s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise , PSRR, bandwidth and load regulation, independent of the programmed output voltage.

2 Additionally, the regulator features programmable current limit, fast start-up capa-bility and programmable power good to indicate output voltage LT3042 is stable with a minimum F ceramic output capacitor. Built-in protection includes reverse bat-tery protection, reverse current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3042 is available in thermally enhanced 10-Lead MSOP and 3mm 3mm DFN Supply Ripple RejectionAPPLICATIONS nUltralow RMS noise : VRMS (10Hz to 100kHz) nUltralow Spot noise : 2nV/ Hz at 10kHz nUltrahigh PSRR: 79dB at 1 MHz nOutput Current: 200ma nWide Input Voltage Range: to 20V nSingle Capacitor Improves noise and PSRR n100 A SET Pin Current: 1% Initial Accuracy nSingle Resistor Programs Output Voltage nHigh Bandwidth: 1 MHz nProgrammable Current Limit nLow Dropout Voltage: 350mV nOutput Voltage Range.

3 0V to 15V nProgrammable Power Good nFast Start-Up Capability nPrecision Enable/UVLO nParallelable for Lower noise and Higher Current nInternal Current Limit with Foldback nMinimum Output Capacitor: F Ceramic nReverse Battery and Reverse Current Protection n10-Lead MSOP and 3mm 3mm DFN Packages nRF Power Supplies: PLLs, VCOs, Mixers, LNAs nVery Low noise Instrumentation nHigh Speed/High Precision Data Converters nMedical Applications: Imaging, Diagnostics nPrecision Power Supplies nPost-Regulator for Switching SuppliesAll registered trademarks and trademarks are the property of their respective owners. Patents Pending. FREQUENCY (Hz)40 PSRR (dB)80120601001010010k100k1M10M3042 TA01b201k30701105090 VIN = 5 VRSET = CSET = FCOUT = FIL = 200ma + 100 AINEN/UVPGGNDOUTLT3042 ILIMPGFB453k1% FVIN5V 5% (MAX) TA01a499 more information CONFIGURATIONABSOLUTE MAXIMUM RATINGSIN Pin Voltage.

4 22 VEN/UV Pin Voltage .. 22 VIN-to-EN/UV 22 VPG Pin Voltage (Note 10) .. , 22 VILIM Pin Voltage (Note 10) .. , 1 VPGFB Pin Voltage (Note 10) .. , 22 VSET Pin Voltage (Note 10) .. , 16 VSET Pin Current (Note 7) .. 20mAOUTS Pin Voltage (Note 10) .. , 16 VOUTS Pin Current (Note 7) .. 20mAOUT Pin Voltage (Note 10) .. , 16V(Note 1)TOP VIEW11 GNDDD PACKAGE10-LEAD (3mm 3mm) PLASTIC DFN10967845321 OUTOUTSGNDSETPGFBININEN/UVPGILIM TJMAX = 150 C, JA = 34 C/W, JC = C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB12345 ININEN/UVPGILIM109876 OUTOUTSGNDSETPGFBTOP VIEW11 GNDMSE PACKAGE10-LEAD PLASTIC MSOP TJMAX = 150 C, JA = 33 C/W, JC = 8 C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCBORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELT3042 EDD#PBFLT3042 EDD#TRPBFLGSJ10-Lead (3mm 3mm) Plastic DFN 40 C to 125 CLT3042 IDD#PBFLT3042 IDD#TRPBFLGSJ10-Lead (3mm 3mm)

5 Plastic DFN 40 C to 125 CLT3042 HDD#PBFLT3042 HDD#TRPBFLGSJ10-Lead (3mm 3mm) Plastic DFN 40 C to 150 CLT3042 MPDD#PBFLT3042 MPDD#TRPBFLGSJ10-Lead (3mm 3mm) Plastic DFN 55 C to 150 CLT3042 EMSE#PBFLT3042 EMSE#TRPBFLTGSH10-Lead Plastic MSOP 40 C to 125 CLT3042 IMSE#PBFLT3042 IMSE#TRPBFLTGSH10-Lead Plastic MSOP 40 C to 125 CLT3042 HMSE#PBFLT3042 HMSE#TRPBFLTGSH10-Lead Plastic MSOP 40 C to 150 CLT3042 MPMSE#PBFLT3042 MPMSE#TRPBFLTGSH10-Lead Plastic MSOP 55 C to 150 CConsult ADI Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping ADI Marketing for information on nonstandard lead based finish more information on lead free part marking, go to: For more information on tape and reel specifications, go to: Some packages are available in 500 unit reels through designated sales channels with #TRMPBF Differential (Note 14).

6 Differential .. 22 VIN-to-OUTS Differential .. 22 VOutput Short-Circuit Duration ..IndefiniteOperating Junction Temperature Range (Note 9) E-, I-Grade .. 40 C to 125 C H-Grade .. 40 C to 150 C MP-Grade .. 55 C to 150 CStorage Temperature Range .. 65 C to 150 CLead Temperature (Soldering, 10 Sec) MSE Package ..300 #orderinfoLT304233042fbFor more information CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 IN Pin Voltage (Note 2)ILOAD = 200ma , VIN UVLO Rising VIN UVLO 752V mVSET Pin Current (ISET)VIN = 2V, ILOAD = 1mA, VOUT = 2V < VIN < 20V, 0V < VOUT < 15V, 1mA < ILOAD < 200ma (Note 3)

7 L99 98100 100101 102 A AFast Start-Up Set Pin CurrentVPGFB = 289mV, VIN = , VSET = Offset Voltage VOS (VOUT VSET) (Note 4)VIN = 2V, ILOAD = 1mA, VOUT = 2V < VIN < 20V, 0V < VOUT < 15V, 1mA < ILOAD < 200ma (Note 3) l 1 21 2mV mVLine Regulation: ISET Line Regulation: VOSVIN = 2V to 20V, ILOAD = 1mA, VOUT = VIN = 2V to 20V, ILOAD = 1mA, VOUT = (Note 4)l 2 3nA/V V/VLoad Regulation: ISET Load Regulation: VOSILOAD = 1mA to 200ma , VIN = 2V, VOUT = ILOAD = 1mA to 200ma , VIN = 2V, VOUT = (Note 4) l3 mVChange in ISET with VSET Change in VOS with VSET Change in ISET with VSET Change in VOS with VSETVSET = to 15V, VIN = 20V, ILOAD = 1mA VSET = to 15V, VIN = 20V, ILOAD = 1mA (Note 4) VSET = 0V to , VIN = 20V, ILOAD = 1mA VSET = 0V to , VIN = 20V, ILOAD = 1mA (Note 4)l l l l30 150 600 2nA mV nA mVDropout VoltageILOAD = 1mA, 50mA l220270 300mV mVILOAD = 150mA (Note 5)270mVILOAD = 200ma (Note 5)350mVGND Pin Current VIN = VOUT(NOMINAL) (Note 6)

8 ILOAD = 10 A ILOAD = 1mA ILOAD = 50mA ILOAD = 100mA ILOAD = 200ma l l l 2 5 7 13mA mA mA mA mAOutput noise Spectral Density (Notes 4, 8)ILOAD = 200ma , Frequency = 10Hz, COUT = F, CSET = F, VOUT = ILOAD = 200ma , Frequency = 10Hz, COUT = F, CSET = F, VOUT 15V ILOAD = 200ma , Frequency = 10kHz, COUT = F, CSET = F, VOUT 15V ILOAD = 200ma , Frequency = 10kHz, COUT = F, CSET = F, 0V VOUT < 60 2 5nV/ Hz nV/ Hz nV/ Hz nV/ HzOutput RMS noise (Notes 4, 8)ILOAD = 200ma , BW = 10Hz to 100kHz, COUT = F, CSET = F, VOUT = ILOAD = 200ma , BW = 10Hz to 100kHz, COUT = F, CSET = F, VOUT 15V ILOAD = 200ma , BW = 10Hz to 100kHz, COUT = F, CSET = F, 0V VOUT < VRMS VRMS VRMSR eference Current RMS Output noise (Notes 4, 8)BW = 10Hz to 100kHz6nARMSR ipple Rejection VOUT 15V VIN VOUT = 2V (Avg) (Notes 4, 15)

9 VRIPPLE = 500mVP-P, fRIPPLE = 120Hz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 150mVP-P, fRIPPLE = 10kHz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 150mVP-P, fRIPPLE = 100kHz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 150mVP-P, fRIPPLE = 1 MHz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 80mVP-P, fRIPPLE = 10 MHz, ILOAD = 200ma , COUT = F, CSET = F95117 91 78 79 56dB dB dB dB dBRipple Rejection 0V VOUT < VIN VOUT = 2V (Avg) (Notes 4, 8)VRIPPLE = 500mVP-P, fRIPPLE = 120Hz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 10kHz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 100kHz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 1 MHz, ILOAD = 200ma , COUT = F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 10 MHz, ILOAD = 200ma , COUT = F, CSET = F104 85 73 72 57dB dB dB dB dBEN/UV Pin ThresholdEN/UV Trip Point Rising (Turn-On)

10 , VIN = Pin HysteresisEN/UV Trip Point Hysteresis, VIN = 2V170mVEN/UV Pin CurrentVEN/UV = 0V, VIN = 20V VEN/UV = , VIN = 20V VEN/UV = 20V, VIN = 0Vl l 8 1 15 A A ALT304243042fbFor more information CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 Current in Shutdown (VEN/UV = 0V)VIN = 6V 10 A AInternal Current Limit (Note 12)VIN = 2V, VOUT = 0V VIN = 12V, VOUT = 0V VIN = 20V, VOUT = 0Vl l220 130270 300 180320 250mA mA mAProgrammable Current LimitProgramming Scale Factor.