LT3045 (Rev. C) - Analog Devices

1 LT30451 Rev. CFor more information APPLICATION FEATURESDESCRIPTION20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear RegulatorThe LT 3045 is a high performance low dropout linear regulator featuring LTC s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applica-tions. Designed as a precision current reference followed by a high performance voltage buffer, the LT3045 can be easily paralleled to further reduce noise, increase output current and spread heat on the device supplies 500mA at a typical 260mV dropout voltage. Operating quiescent current is nominally and drops to <<1 A in shutdown. The LT3045 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 LT3045 is stable with a minimum 10 F ceramic output capacitor. Built-in protection includes reverse-battery protection, reverse- current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3045 is available in thermally enhanced 12-Lead MSOP and 10-Lead 3mm 3mm DFN Supply Ripple RejectionAPPLICATIONS nUltralow RMS Noise: VRMS (10Hz to 100kHz) nUltralow Spot Noise: 2nV/ Hz at 10kHz nUltrahigh PSRR: 76dB at 1 MHz nOutput current : 500mA 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: 260mV 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: 10 F Ceramic nReverse-Battery and Reverse- current Protection n12-Lead MSOP and 10-Lead 3mm 3mm DFN Packages nAEC-Q100 Qualified for Automotive Applications nRF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs 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 = 5 VRSET = = FCOUT = 10 FIL = 500mAFREQUENCY (Hz)101001k10k100k1M10M20304050607080901 00110120 PSRR (dB)3045 TA01b+ 100 AINEN/UVPGGNDOUTLT3045 ILIMPGFB402k10 F**OPTIONAL, SEE APPLICATIONS INFORMATIONVIN5V 5% FVOUT3 VIOUT(MAX) TA01a249 FeedbackLT30452 Rev.

4 CFor more information CONFIGURATIONABSOLUTE MAXIMUM RATINGSIN Pin Voltage .. 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 DFNTJMAX = 150 C, JA = 34 C/W, JC = C/WEXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB10967845321 OUTOUTSGNDSETPGFBININEN/UVPGILIM123456 INININEN/UVPGILIM121110987 OUTOUTOUTSGNDSETPGFBTOP VIEWMSE PACKAGE12-LEAD PLASTIC MSOPTJMAX = 150 C, JA = 33 C/W, JC = 8 C/WEXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB13 GNDORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELT3045 EDD#PBFLT3045 EDD#TRPBFLGYP10-Lead (3mm 3mm) Plastic DFN 40 C to 125 CLT3045 IDD#PBFLT3045 IDD#TRPBFLGYP10-Lead (3mm 3mm)

5 Plastic DFN 40 C to 125 CLT3045 HDD#PBFLT3045 HDD#TRPBFLGYP10-Lead (3mm 3mm) Plastic DFN 40 C to 150 CLT3045 MPDD#PBFLT3045 MPDD#TRPBFLYGP10-Lead (3mm 3mm) Plastic DFN 55 C to 150 CLT3045 EMSE#PBFLT3045 EMSE#TRPBF304512-Lead Plastic MSOP 40 C to 125 CLT3045 IMSE#PBFLT3045 IMSE#TRPBF304512-Lead Plastic MSOP 40 C to 125 CLT3045 HMSE#PBFLT3045 HMSE#TRPBF304512-Lead Plastic MSOP 40 C to 150 CAUTOMOTIVE PRODUCTS** LT3045 EMSE#WPBFLT3045 EMSE#WTRPBF304512-Lead Plastic MSOP 40 C to 125 CLT3045 IMSE#WPBFLT3045 IMSE#WTRPBF304512-Lead Plastic MSOP 40 C to 125 CLT3045 HMSE#WPBFLT3045 HMSE#WTRPBF304512-Lead Plastic MSOP 40 C to 150 CContact the factory for parts specified with wider operating temperature ranges.

6 *The temperature grade is identified by a label on the shipping and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.**Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these Differential (Note 14) .. Differential .. 22 VIN-to-OUTS Differential.

7 22 VOutput Short-Circuit Duration ..IndefiniteOperating Junction Temperature Range (Note 9) E-Grade, I-Grade .. 40 C to 125 C H-Grade, .. 40 C to 150 CMP-Grade (Note 15) .. 55 C to 150 C Storage Temperature Range .. 65 C to 150 CLead Temperature (Soldering, 10 Sec) MSE Package ..300 CLT30453 Rev. CFor more information CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 Voltage Rangel220 VMinimum IN Pin Voltage (Note 2)ILOAD = 500mA, VIN UVLO Rising VIN UVLO 752V mVOutput Voltage RangeVIN > VOUTl015 VSET Pin current (ISET)VIN = 2V, ILOAD = 1mA, VOUT = 2V < VIN < 20V, 0V < VOUT < 15V, 1mA < ILOAD < 500mA (Note 3)

8 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 < 500mA (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 500mA, VIN = 2V, VOUT = ILOAD = 1mA to 500mA, 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 l220275 330mV mVILOAD = 300mA (Note 5) l220280 350mV mVILOAD = 500mA (Note 5) l260350 450mV mVGND Pin current VIN = VOUT(NOMINAL) (Note 6)

9 ILOAD = 10 A ILOAD = 1mA ILOAD = 50mA ILOAD = 100mA ILOAD = 500mA l l l 15 4 7 25mA mA mA mA mAOutput Noise Spectral Density (Notes 4, 8)ILOAD = 500mA, Frequency = 10Hz, COUT = 10 F, CSET = F, VOUT = ILOAD = 500mA, Frequency = 10Hz, COUT = 10 F, CSET = F, VOUT 15V ILOAD = 500mA, Frequency = 10kHz, COUT = 10 F, CSET = F, VOUT 15V ILOAD = 500mA, Frequency = 10kHz, COUT = 10 F, CSET = F, 0V VOUT < 70 2 5nV/ Hz nV/ Hz nV/ Hz nV/ HzOutput RMS Noise (Notes 4, 8)ILOAD = 500mA, BW = 10Hz to 100kHz, COUT = 10 F, CSET = F, VOUT = ILOAD = 500mA, BW = 10Hz to 100kHz, COUT = 10 F, CSET = F, VOUT 15V ILOAD = 500mA, BW = 10Hz to 100kHz, COUT = 10 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, 8)

10 VRIPPLE = 500mVP-P, fRIPPLE = 120Hz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 150mVP-P, fRIPPLE = 10kHz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 150mVP-P, fRIPPLE = 100kHz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 150mVP-P, fRIPPLE = 1 MHz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 80mVP-P, fRIPPLE = 10 MHz, ILOAD = 500mA, COUT = 10 F, CSET = F117 90 77 76 53dB dB dB dB dBRipple Rejection 0V VOUT < VIN VOUT = 2V (Avg) (Notes 4, 8)VRIPPLE = 500mVP-P, fRIPPLE = 120Hz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 10kHz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 100kHz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 1 MHz, ILOAD = 500mA, COUT = 10 F, CSET = F VRIPPLE = 50mVP-P, fRIPPLE = 10 MHz, ILOAD = 500mA, COUT = 10 F, CSET = F104 85 72 64 54dB dB dB dB dBEN/UV Pin ThresholdEN/UV Trip Point Rising (Turn-On), VIN = Pin HysteresisEN/UV Trip Point Hysteresis, VIN = 2V130mVLT30454 Rev.