LOW DROPOUT (LDO) LINEAR REGULATORS SELECTION GUIDE

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1 LOW DROP (LDO) LEAR REGULATORS SELECTI GUIDE Visit analog.com

2 2 Introduction Analog Devices Power by Linear product group produces a broad line of high performance low dropout (LDO) linear regulators. These LDOs offer very low dropout, fast transient response, excellent line and load regulation, and feature a very wide input voltage range from.9 V to 8 V. Output currents range from 1 ma to 1 A, with positive, negative and multiple outputs. Many devices offer output voltage operation <.8 V and some feature operation down to as low as V even with single-supply operation. Many are stable with ceramic output capacitors. These devices can be designed into virtually any end application and market segment. Contents. Positive LDOs UltraLow Noise (<2 µv RMS ) Positive Linear Regulators. 3 Low Noise (<1 µv RMS ) Low Power Positive Linear Regulators. 4 Positive Linear Regulators. 6 Chip Scale Package Linear Regulators. 8 Very Low Dropout Low (VLDO) Linear Regulators 9 Low, Low Noise, High Current Linear Regulators. 1 Low Linear Regulators. 11 High Voltage Linear Regulators. 12 Current-Based Reference Linear Regulators. 13 Negative LDOs Low Noise Negative Linear Regulators. 5 Current Sources Current Sources. 13 Multi-Channel LDOs Multi-Channel Output Linear Regulators. 14 Radiation-Hardened LDOs Radiation Hardened (RH) Linear Regulators. 15

3 Visit analog.com 3 UltraLow Noise (<2 µv RMS ) Positive Linear Regulators LT345/LT345-1: 2 V, 5 ma, Ultralow Noise, Ultrahigh PSRR Linear Regulator ADM7154: 6 ma, Ultralow Noise, High PSRR, RF Linear Regulator 1.8 V to 2 V /UV PG.8 µv RMS Output Noise 2 nv/ Hz Spot Noise LT345 S Down to V at 5 ma = 3.8 V C 1 µf C BYP C REG 1 µf V BYP V REG ADM7154 V REF REF_SSE = 3.3 V C 1 µf C REF SET I LIM PGFB RMS PUT NOISE ) Integrated RMS Output Noise (1 Hz to 1 khz) = 5 V R SET = 33.2 k C = 1 µf C SET = 4.7 µf LOAD CURRT (ma) NOISE SPECTRAL DSITY (nv/ Hz) 1 k 1 k Noise Spectral Density for Various Values of C BYP FREQUCY (Hz) NOISE FLOOR 1. µf 3.3 µf 1 µf 33 µf 1 µf 33 µf 1 µf k 1 k 1 k 1 M UltraLow Noise (<2 µv RMS ) Linear Regulators Range Range ) Noise Density, 1 khz (nv/ Hz) Typ PSRR at 1 MHz, (db) (ma) LT to 2 to 15.8* LT345/ LT345-1 ADM7154 ADM to 5.5 ADM715 ADM to 16 ADP7156 ADP to 5.5 ADP7158 ADP to 5.5 *1 Hz to 1 khz **1 Hz to 1 khz to 2 to 15.8* to 3.3 Fixed/ 1.2 to 3.4 Adj 1.8 to 5 Fixed/ 1.5 to 5.1 Adj 1.2 to 3.3 Fixed/ 1.2 to 3.3 Adj 1.2 to 3.3 Fixed/ 1.2 to 3.3 Adj.9** ** ** 1.7 6/ ** 1.7 5/ DFN-1, MSOP-1E 3 3 DFN-1, MSOP-12E 3 3 LFCSP-8, 3 3 LFCSP-8, 3 3 LFCSP-1, 3 3 LFCSP-1,

4 4 Low Noise (<1 µv RMS ) Low Power Positive Linear Regulators ADM7172: 6.5 V, 2 A, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO ADM716: 6 ma, Ultralow Noise, High PSRR, RF Linear Regulator = 5 V C 4.7 µf ADM7172 V SSE SS = 3.3 V C SS 1 nf C 4.7 µf = 2.9 V C 4.7 µf ADM NC 5 4 NC = NO CNECT = 2.5 V C 4.7 µf 2.5 V to 5 V Transient Response (Trace 2), 1 ma to 1.5 A Load Step in 4 ns (Trace 1) V TO V REF V DD V REF DVDD 16-Bit/18-Bit ADC V DD DIGITAL PUT 1.8 V to 5 V T 1 vs Load Current, 1 Hz to 1 khz 1 2 = 3.3 V = 2.5 V = 1.8 V CH1 1.A Ω B W CH2 2mV B W M4ns A CH3 1mV T.% NOISE ) I LOAD (ma) Low Noise (<1 µv RMS ) Low Power Positive Linear Regulators Range Range )* Noise Density, 1 khz (nv/ Hz) Typ PSRR at 1 MHz, (db) ADM to to µa 2 2 LFCSP-6, TSOT-5 ADM to to 5 5^ µa 3 3 LFCSP-8 ADM to to 5 5^ µa 3 3 LFCSP-8 ADM to to 5 5^ µa 3 3 LFCSP-8 ADP to 1.98 Fixed 3^ ma 3 3 LFCSP-16 ADP to 1.98 Fixed 3^ ma 3 3 LFCSP-16 ^1 Hz to 1 khz

5 Visit analog.com 5 Low Noise Negative Linear Regulators LT394: 2 V, 5 ma UltraHigh PSRR, UltraLow Noise Linear Regulator ADP7185: 5 ma, Ultralow Noise, High PSRR, Low Dropout Linear Regulator 3.3 V PG /UV SET I LIM PGFB S LT394 V to 19.5 V at 5 ma = 3 V 1.3 V C 4.7 µf 1.25 V V V REG EP SSE ADP7185 VA VAFB R1 1 kω C 4.7 µf R kω = 2.5 V C AFB 1 nf C A 1 µa Only.85 µv (1 Hz-1 khz) C REG 2 V to 2 V RMS PUT NOISE ) Integrated RMS Output Noise (1 Hz to 1 khz) = 5 V R SET = 33.2 k C = 1 µf C SET = 4.7 µf NSD (nv/ Hz) 1k 1k Noise Spectral Density (NSD) vs Frequency at Various Output Voltages 1.2 V 2.5 V 3.3 V 4.5 V 4.5 V ADJ LOAD CURRT (ma) k 1 k 1 k 1 M 1 M FREQUCY (Hz) Low Noise Negative Linear Regulators Range Range ) ADP to to 27 18** µa 2 2 LFCSP-6, 3 3 LFCSP-8, TSOT-5 LT to to 2 3* 34 3 µa 3 3 DFN-8 SOT-23 ADP to to 5 4 (Indep of )** 13 6 µa 2 2 LFCSP-8 ADP to to 5 4 (Indep of )** 19 6 µa 2 2 LFCSP-8 LT to 2 to * ma 3 3 DFN-12 MSOP-12E LT to to 2 No Spec 5 45 µa DDPAK-5, N-8,, SOT-223, TO-22 LT to 36 to 32 18* 3 1 ma 3 3 DFN-1, MSOP-12E, DDPAK-7, TO-22, TSSOP-16 LT to 36 to 32 18* 3 1 ma 3 3 DFN-1, 4 3 DFN-14, DDPAK-7, TO-22, TSSOP-16 LT to to 35 No Spec ma DDPAK-5 TO-22 *1 Hz to 1 khz **1 Hz to 1 khz

6 Positive Linear Regulators ADP7142: 4 V, 2 ma, Low Noise, CMOS LDO Linear Regulator LT365: 45, 5 ma Low Noise, Linear Regulator with Programmable Current Limit and Power Good = 7 V C 2.

6 6 Positive Linear Regulators ADP7142: 4 V, 2 ma, Low Noise, CMOS LDO Linear Regulator LT365: 45, 5 ma Low Noise, Linear Regulator with Programmable Current Limit and Power Good = 7 V C 2.2 µf ADP7142 SSE/ADJ SS = 6 V 2 kω 1 kω C SS 1 nf C 2.2 µf 1.8 V to 45 V LT365 SHDN PWRGD REF/BYP ADJ I MAX Down to.6 V at 5 ma Only 25 µv RMS Noise (1 Hz-1 khz) 2 Power Supply Rejection Ratio (PSRR) vs Frequency, = 3.3 V, for Various Headroom Voltages Precision Current Limit, R IMAX = 1.5 k (NOMAL) = 5 V PSRR (db) V 2. V V 1.4 V 1.2 V 1. V 1 8 mv 7 mv 6 mv 5 mv k 1k 1k 1M 1M FREQUCY (Hz) CURRT LIMIT (ma) = 1 V 24 2 = 5.6 V TEMPERATURE ( C) Positive Linear Regulators Range Range ) LT314/LT314B.2 3 to 8 Adj (1.22 to 6) 115/15* 35 7 µa 3 3 DFN-8, SOT-23 LT31/LT31B LT to 8 Adj (1.275 to 6), 5 Adj (1.24 to 6) 1* 3 3 µa 45 µa MSOP-8E 3 3 DFN-1, MSOP-12E LT to 2 Adj (1.22 to 19.5), Fixed 2* 3 2 µa TSOT-5 LT to 45.6 to * µa 2 3 DFN-12, MSOP-12E LT to 45.6 to * 3 4 µa 2 2 DFN-8, TSOT-8 LT361^ to 45.6 to * µa 2 3 DFN-8, MSOP-8E LT to 2 Adj (1.22 to 19.5), Fixed 2* µa MSOP-8 LT1121/LT1121A/ LT1121HV to 3/ to 29/35, Fixed N/A 42 3 µa ADP to 4 Adj (1.2 to 39) 11** 2 5 µa ADP to 2 ADP to 2 Adj (1.22 to 19) Fixed 1.2 to 5 Adj (1.22 to 19) Fixed 1.2 to 5 11** 2 5 µa SOT-223, TO-92, PDIP LFCSP-6, E, TSOT LFCSP-6,, TSOT-5 11** 2 5 µa WLCSP-6 LT to 45.6 to * 3 45 µa 2 2 DFN-8, MSOP-8E LT363^ to 45.6 to * 3 45 µa 2 3 DFN-8, MSOP-8E LT312/LT312B LT to 8 Adj (1.24 to 6) 1* 4 4 µa 65 µa 4 3 DFN-12, TSSOP-16

7 Visit analog.com 7 Positive Linear Regulators Positive Linear Regulators (continued) Range Range ) LT to 2 Adj (3.75 to 19), Fixed N/A 5 12 µa SOT-223 MSOP-8 LT to 2 Adj (1.22 to 19.5), Fixed 2* 27 3 µa MSOP-8 ADP to 2 Adj (1.22 to 19) Fixed 1.5 to 9 15** 2 75 µa 3 3 LFCSP-8, ADP17, ADP to 3.6 Fixed µa TSOT-5 LT to 2 Adj (1.22 to 19.5), Fixed 2* 3 3 µa 3 4 DFN-12 ADP to 2 Adj (1.22 to 19) 3 3 LFCSP-8, 15** 35 9 µa Fixed 1.5 to 1 ADP to 2 Adj (1.22 to 19) Fixed 1.8, 3.3, 5 15** 35 9 µa LT to 45.6 to * µa LT to 45.6 to * 3 55 µa LT366^.5 2 to 45.6 to * 3 64 µa LT to 3 Adj (3.75 to 29), Fixed 93* 4 5 µa LT to 15 Adj (1.25 to 14), Fixed N/A 12 5 µa LT1118.4/.8 3 to 15 Adj (1.225 to 14), Fixed N/A 1 6 µa LT to 2 Adj (1.2 to 19.5), Fixed 4* 31 5 µa LT1963/LT1963A to 2 Adj (1.21 to 19.5), Fixed 4* 34 1 ma LT to 25 Adj (1.25 to 23.5), Fixed.3 % of *** 13 5 ma LT1764/A to 2 Adj (1.21 to 19.5), Fixed 4* 34 1 ma LT to 3 Adj (1.25 to 28.5), Fixed.3 % of *** 13 5 ma LT to 15 Adj (3.75 to 14), 3.3, 5 N/A 6 5 µa LT to 7 Adj (1.25 to 5.5), Fixed LT1585/LT1585A 4.6/5 2.7 to 7 Adj (1.25 to 5.5), Fixed LT to 3 Adj (1.25 to 28.5), Fixed LT to 7 Adj (1.25 to 5.5), Fixed.3 % of ***.3 % of ***.3 % of ***.3 % of *** 12 8 ma 11/12 8 ma 13 5 ma 3 3 LFCSP-8, 3 4 DFN-16, MSOP-16E 3 3 DFN-1, MSOP-12E 3 4 DFN-12, MSOP-12E SOT-223 TO-22 TSSOP-2 SOT-223 SOT DFN-8 MSOP-8E TO-22 SOT-223 TO-22 TSSOP-16E TO-22 TO-22 TSSOP-16E TO-22 TO-22 TO-22 TO-22 TO-22 TO-3P ma TO-22 LT to 6 Adj (1.25 to 5.4), 2.5 N/A 54 1 ma TO-22 LT to 6 Adj (1.25 to 5.5), 2.5 N/A 43 1 ma TO-22 ^ Active Output Discharge * 1 Hz to 1 khz ** 1 Hz to 1 khz *** 1 Hz to 1 khz

8 8 Chip Scale Package Linear Regulators ADP151: Ultralow Noise, 2 ma CMOS Linear Regulator = 2.3 V C 1 2 ADP151 A B = 1.8 V C ADP121: 15 ma, Low, CMOS Linear Regulator in 5-Lead TSOT or 4-Ball WLCSP = 2.3 V C ADP121 = 1.8 V C NOISE (µv rms) Output Noise vs Load Current and Output Voltage, = 5 V, C = 1 μf 3.3 V 2.8 V 1.2 V 1.1 V k LOAD CURRT (ma) PSRR (db) Power Supply Rejection Ratio vs Frequency V RIPPLE = 5 mv = 5 V = 1.2 V C = 15 ma 1 ma 1 ma 1 ma 1 µa µa k 1 k 1 k 1 M 1 M FREQUCY (Hz) Chip Scale Package Linear Regulators Range Range Range )* (µa) ADP16 to ADP to 5.5 Fixed WLCSP-4, 2 2 LFCSP-6, TSOT-4 ADP to 5.5 Fixed WLCSP-4 TSOT-5, 2 2 LFCSP-6 ADP to 2 Fixed WLCSP, 2 2 LFCSP-6, TSOT-5, ADP to 2 Fixed WLCSP, 2 2 LFCSP-6, TSOT-5, ADP to 5.5 Fixed WLCSP-4 TSOT-5, 2 2 LFCSP-6 ADM to 5.5 Fixed WLCSP-4 TSOT-5, 2 2 LFCSP-6 ADP12 to ADP to to 5.5 Fixed 25~ WLCSP-4 TSOT-5, 2 2 LFCSP-6 ADP to 3.6 Fixed WLCSP-4 ADP22 to ADP225.2 to to 5.5 Fixed WLCSP, 2 2 LFCSP-8 *1 Hz to 1 khz

Visit analog.com 9 Very Low Dropout Low (VLDO) Linear Regulators ADP1761: 1 A, Low, Low Noise, CMOS Linear Regulator LT333: 3 A,.95 V to 1 V Very Low Dropout Linear Regulator PG = 1.

9 Visit analog.com 9 Very Low Dropout Low (VLDO) Linear Regulators ADP1761: 1 A, Low, Low Noise, CMOS Linear Regulator LT333: 3 A,.95 V to 1 V Very Low Dropout Linear Regulator PG = 1.7 V C 1 µf R PULL-UP 1 kω PG ADP1761 SSE = 1.5 V C 1 µf.95 V to 1 V VLDO: 95 mv Dropout SHDN LT333 ADJ PWRGD.2 V to 9.7 V at up to 3 A SS VADJ C SS 1 nf C REG V REG REFCAP C REF R ADJ 1 kω IM REF/BYP I LIM DROP VOLTAGE vs Load Current, = 1.3 V.1 1 LOAD MIMUM PUT VOLTAGE Minimum Input Voltage vs Temperature TEMPERATURE ( C) I L = 3 A Very Low Dropout Low (VLDO) Linear Regulators Range Range )* LT to 1 Adj (.9 to 9.5), Fixed µa 3 3 DFN-8 MSOP-8 LTC to 6.5 Adj (1.25 to 6), Fixed µa TSOT-5 LTC to 5.5 Adj (.4 to 3.6), Fixed µa 2 2 DFN-6 LTC to 5.5 Adj (.4 to 3.6) µa 2 2 DFN-6 LT to 1 Adj (.9 to 9.5), Fixed µa 5 5 DFN-16 LTC325-x.5.9 to 5.5 Adj (.4 to 3.6), Fixed µa 2 2 DFN-6 LT to 1 Adj (.2 to 9.5), Fixed µa 3 5 DFN-16 TSSOP-16E ADP to 1.98 Adj (.5 to 1.5), Fixed ma 3 3 LFCSP LTC to 5.5 Adj (.4 to 2.6) µa 3 3 DFN-1 MSOP-1E ADP to 1.98 Adj (.5 to 1.5), Fixed ma 3 3 LFCSP ADP to 1.98 Adj (.5 to 1.5), Fixed ma 3 3 LFCSP LT to 1.2 to ma 3 4 QFN-2 ADP to 1.98 Adj (.5 to 1.5), Fixed ma 3 3 LFCSP ADP to 1.98 Adj (.5 to 1.5), Fixed ma 3 3 LFCSP LT to 3. V BIAS : 2.2 to 3.6 Adj (.8 to 18) ma 4 5 QFN-28 LT to 3. V BIAS : 2.2 to 3.6 Adj (.8 to 1.8) ma 4 5 QFN-28 *1 Hz to 1 khz

1 Low, Low Noise, High Current Linear Regulators ADP1765: 5 A, Low, Low Noise, CMOS Linear Regulator LT371: 5 A, Low Noise, Programmable Output, 85 mv Dropout Linear Regulator with Analog Margining

10 1 Low, Low Noise, High Current Linear Regulators ADP1765: 5 A, Low, Low Noise, CMOS Linear Regulator LT371: 5 A, Low Noise, Programmable Output, 85 mv Dropout Linear Regulator with Analog Margining PG = 1.8 V R PULL-UP 1 kω C SS 1 nf C 22 µf C REG PG SS V REG ADP1765 SSE (V DROP ) vs Load Current (I LOAD ), = 1.3 V VADJ REFCAP = 1.5 V C 22 µf C REF R ADJ 1 kω.95 V to 3. V V BIAS 2.2 V to 3.6 V Tie High, Low or Float Analog Margining ±1% V V 1 V 2 MARGA VIOC BIAS PWRGD LT371 SSE I M REF/BYP PGOOD - Dropout Voltage Only 85 mv.8 V to 1.8 V Up to 5 A Digitally Programmable Output.1.9 V DROP LOAD CURRT DROP VOLTAGE = (NOMAL) = 1.8 V V BIAS = 3.3 V =.8 V V BIAS = 2.5 V PUT CURRT Low, Low Noise, High Current Linear Regulators Range Range )* (ma) ADP to 3.6 Fixed.75 to LFCSP-16 ADP to 3.6 Adj (.75 to 3.3) LFCSP-16 ADP to 1.98 Fixed LFCSP-16 ADP to 3.6 Fixed.75 to LFCSP-16 ADP to 3.6 Adj (.75 to 3.3) LFCSP-16 ADP to 1.98 Fixed LFCSP-16 ADP to 3.6 Fixed.75 to LFCSP-16 ADP to 3.6 Adj (.75 to 3.3) LFCSP-16 ADP to 1.98 Fixed LFCSP-16 ADP to 1.98 Fixed LFCSP-16 ADP to 1.98 Fixed LFCSP-16 LT to 3. Adj (.8 to 1.8) QFN-28 LT371^ 5.95 to 3. Adj (.8 to 1.8) QFN-28 ^ Margining *1 Hz to 1 khz

Visit analog.com 11 Low Linear Regulators LT38: 3 μa I Q, 2 ma, 45 V Low Dropout Linear Regulator ADP165/ADP166: Very Low, 15 ma, with Output Discharge LDO Regulators 2 V to 45 V LT38 Down to.

11 Visit analog.com 11 Low Linear Regulators LT38: 3 μa I Q, 2 ma, 45 V Low Dropout Linear Regulator ADP165/ADP166: Very Low, 15 ma, with Output Discharge LDO Regulators 2 V to 45 V LT38 Down to.6 V at 2 ma = 2.3 V A 1 2 ADP165/ADP166 = 1.8 V High Ultralow I Q = 3 µa SHDN ADJ B Ground Current vs Junction Temperature 1 / DROP VOLTAGE I LOAD = 2mA I Q DROP VOLTAGE QUIESCT CURRT (µa) GROUND CURRT (µa) 1 1 NO LOAD 1 µa 1 µa 1 ma 1 ma 1 ma 15 ma JUNCTI TEMPERATURE ( C) TEMPERATURE ( C) Low Linear Regulators (ma) Range Range Supply Current (µa) LT37^ 2 2 to 45 Adj (.6 to 44.5), Fixed LT to 45 Adj (.6 to 44.5), Fixed )* LT to 2 Adj (.6 to 19), Fixed LT314/LT314B 2 3 to 8 Adj (1.22 to 6) /15 ADP16 to ADP to 5.5 Adj (1. to 4.2), Fixed ^FMEA Fault Tolerant *1 Hz to 1 khz SOT-23, 2 2 DFN-6 SOT-23, 2 2 DFN DFN-6, SC DFN-8, SOT WLCSP-4, 2 2 LFCSP-6, TSOT-4

12 High Voltage Linear Regulators LT31: 5 ma, 3 V to 8 V Low Dropout Micropower Linear Regulator LT312/LT313: 25 ma, 4 V to 8 V Low Dropout Micropower Linear Regulators 3 V to 8 V I Q = 3 µa LT31 5 V

12 12 High Voltage Linear Regulators LT31: 5 ma, 3 V to 8 V Low Dropout Micropower Linear Regulator LT312/LT313: 25 ma, 4 V to 8 V Low Dropout Micropower Linear Regulators 3 V to 8 V I Q = 3 µa LT31 5 V at 5 ma Thermally Enhanced MSOP-8 Package = 3 V to 8 V Micropower; I Q = 4 µa Low Dropout; 4 mv Power Good Flag (LT313) LT312/LT313 SHDN ADJ V to 6 V 3.3 µf Input Ripple Rejection RIPPLE REJECTI (db) = 7V 5 mv RMS RIPPLE I L = 5 ma C = C = 1 µf 1 1k 1k 1k 1M FREQUCY (Hz) DROP VOLTAGE PUT CURRT (ma) High Voltage Linear Regulators (ma) Range Range )* (µa) LT314/LT314B 2 3 to 8 Adj (1.22 to 6) 115/ LT31/LT31B 5 3 to 8 Adj (1.275 to 6), /45 LT311^ 5 3 to 8 Adj (1.24 to 6), /45 LT312/LT312B 25 4 to 8 Adj (1.24 to 6) 1 4 4/65 LT313^ 25 4 to 8 Adj (1.24 to 6) 1 4 4/65 ^Power Good *1 Hz to 1 khz 3 3 DFN-8, SOT-23 MSOP-8E, 3 3 DFN DFN-1, MSOP-12E 4 3 DFN-12, TSSOP DFN-12, TSSOP-16

Visit analog.com 13 Current-Based Reference Linear Regulators LT381: 1.5 A Single Resistor Rugged Linear Regulator with Monitors LT38/LT38-1: Adjustable 1.

2 V to 4 V V CTROL SET 1 µa LT38 1 mω PCB Trace Ballast Output Adjustable Down to V SET 165 k 1 µf 5.5 5.4 5.3 SET Pin Current I L = 5mA SET Pin Current Distribution N = 13792 SET P CURRT (µa) 5.2 5.

13 Visit analog.com 13 Current-Based Reference Linear Regulators LT381: 1.5 A Single Resistor Rugged Linear Regulator with Monitors LT38/LT38-1: Adjustable 1.1 A Single Resistor Low Dropout Regulator LT V to 4 V V CTROL 1 µa LT38 TEMP I SET 5 µa SET I M I LIM Wide Safe Operating Area (SOA) V to 38.5 V 1 ma to 1.5 A 1.2 V to 4 V V CTROL SET 1 µa LT38 1 mω PCB Trace Ballast Output Adjustable Down to V SET 165 k 1 µf SET Pin Current I L = 5mA SET Pin Current Distribution N = SET P CURRT (µa) TEMPERATURE ( C) SET P CURRT DISTRIBUTI (µa) Current-Based Reference Linear Regulators Range Range )* LT to 4 Adj ( to 38.5) V 5 µa 3 3 DFN-8/TSOT23-8/SOT-223 LT to 36 Adj ( to 35.7) mv# 1 ma 2 3 DFN-6/MSOP-8E LT to 36 Adj ( to 34.5) V 4 µa 3 3 DFN-8/SOT-223/ LT to 36 Adj ( to 34.5) V 1.1 ma 4 4 DFN-12/TSSOP-16/ LT38/LT38-1@ to 36 Adj ( to 35.7) 4 35 mv# 1.3 V (SOT-223) 1 ma 3 3 DFN-8/MSOP-8E/SOT-223/TO-22/ LT to 36 Adj ( to 34.5) V 1.1 ma 4 4 DFN-12 /TSSOP-16E/TO-22/ LT to 4 Adj (.4 to 32) 4 33 mv 1.2 ma 4 5 DFN-16/TSSOP-16E/TO-22/ LT to 8/18 ^ Adj ( to 7.5 or to 17.5^) 4 3 mv 1 ma 4 4 DFN-12 Integrated Ballast Resistor ^ and TO-22 Packages *1 Hz to 1 khz #Dual-Supply Operation Current Sources Part Number Range Initial Accuracy (%) Current Regulation (ppm/v) Reverse Protection V/I Quiescent Current (µa) Current Limiting Thermal Protection LT392.5 ma to 2 ma 1.2 to 4 1 <1 Yes/Yes 3 Yes Yes 3 x 3 DFN-8/TSOT23-8/SOT-223 LM334 1 µa to 1 ma.8 to No/Yes 28 No No TO-92/

14 14 Multi-Channel Output Linear Regulators LT329: Dual 5 ma/5 ma Low Dropout, Low Noise, Micropower Linear Regulator ADP323: Triple, 2 ma, Low Noise, High PSRR Voltage Regulator 1.8 V to 2 V 3.3 µf Independent Enable Pins Only 2 µv RMS Output Noise LT SHDN1 SHDN2 BYP1 ADJ1 1 Down to 1.22 V at 5 ma 3.3 µf 2 Down to V at 5 ma BYP2 3.3 µf ADJ2 2.5 V to 5.5 V 1.8 V to 5.5 V 1.8 V to 5.5 V V BIAS 1 / ADP323 V BIAS LDO 1 LD1 V BIAS LDO 2 LD2 V BIAS LDO 3 LD3 FB1 FB2 FB DROP VOLTAGE vs Load Current T J = 25 C PUT CURRT (ma) PSRR (db) Power Supply Rejection Ratio vs Frequency, = 1.5V, = 2.5 V, V RIPPLE = 5 mv, C = 1 ma 1 ma 2 ma k 1k 1k 1M 1M FREQUCY (Hz) Multi-Channel Output Linear Regulators # Channels Range Range )* Quiescent Current (µa) Positive: 5.5 V MAX ADP22 to ADP /.2 to WLCSP, 2.5 to 5.5 Fixed / LFCSP ADP32 to ADP /.2/ to 5.5 Fixed LFCSP-16 Positive: 2 V MAX LT DFN-1, 2.1/ to 2 Adj (1.22 to 2) LT327 MSOP-1E 3 4 DFN-12, LT324 TSSOP-16 / 2.1/ to 2 Adj (1.22 to 2) LT DFN-16, TSSOP-16 LT / to 2 Adj (1.215 to 19.5) DFN-16, MSOP-16E LT / to 2 Adj (1.22 to 19.5) QFN-28, TSSOP-2 Positive/Negative LT /.15 ±2.3 to ±2 Adj, ±3, ±5, ±12, ±15 2/3 3/ DFN-14 *1 Hz to 1 khz

15 Visit analog.com 15 Radiation-Hardened (RH) Linear Regulators Radiation-Hardened (RH) Linear Regulators Range V REF /I REF Polarity RH186M.5/1.5 Up to V Positive DICE TO-3 TO-39 RH117.5/1.5 Up to V Positive DICE TO-3 TO-39 RH38^ 1 Up to 35 1 µa Positive DICE RH137.5/1.5 Down to V Negative DICE TO-3 TO-39 RH to V Positive DICE RH383^ 3 Up to 23 1 µa Positive DICE RH Down to V Negative DICE RH Up to V Positive DICE RH184 5 Up to V Positive TO-3 ^Current Source Reference References Robert Dobkin, New Linear Regulators Solve Old Problems, Linear Technology Corporation, Application Note 142, August 213 Jim Williams, Load Transient Response Testing for Voltage Regulators, Linear Technology Corporation, Application Note 14, October 26. Jim Williams, Minimizing Switching Regulator Residue in Linear Regulator Outputs, Linear Technology Corporation, Application Note 11, July 25. Todd Owen and Jim Williams, Performance Verification of Low Noise, Low Dropout Regulators, Linear Technology Corporation, Application Note 83, March 2. Craig Varga, LT1575 Ultrafast Linear Controller Makes Fast Transient Response Power Supplies, Linear Technology Corporation, Application Note 69, September 1996 (see Appendix A, Using PCB Material as Low Value Resistors). Goran Perica, Ceramic Input Capacitors Can Cause Overvoltage Transients, Linear Technology Corporation, Application Note 88, March 21. Bill Roehr, Mounting Considerations for Power Semiconductors, Semiconductor, Application Note 14/D, May 21. Tom Gross, LDO Linear Regulators Rival Switchers for Efficiency, Linear Technology Corporation, Linear Technology Magazine, May 25. LT1963A 1.5 A, Low Noise, Fast Transient Response LDO Regulator data sheet, Linear Technology Corporation. All reference materials listed above are available at Videos/Video Product Briefs LT39 LT315 LT342 LT37/71 LT38 LT381 LT386 LT39 LT392 LT394 All videos listed above are available at

LT38/LT38-1 ADJUSTABLE 1.1A SGLE RESISTOR LOW DROP REGULATOR Outputs Can Be Paralleled Output Current: 1.1A Low : 3mV @ 1.

16 LT38/LT38-1 ADJUSTABLE 1.1A SGLE RESISTOR LOW DROP REGULATOR Outputs Can Be Paralleled Output Current: 1.1A Low : 1.1A Low Noise: 4µV RMS Wideband (1kHz) Stable 1µA Current Source Reference Single Resistor Programs EASILY PARALLELED: HIGH PUT CURRT WITH HOT SPOTS 1.2V TO 36V 1µF V CTROL V CTROL LT38 SET LT38 SET Output Adjustable Down to V 1µF 1mΩ PCB Trace Ballast DATA SHEET Analog Devices, Inc. Worldwide Headquarters Analog Devices, Inc. One Technology Way P.O. Box 916 Norwood, MA U.S.A. Tel: ( , U.S.A. only) Fax: Analog Devices, Inc. Europe Headquarters Analog Devices GmbH Otl-Aicher-Str München Germany Tel: Fax: Analog Devices, Inc. Japan Headquarters Analog Devices, KK New Pier Takeshiba South Tower Building Kaigan, Minato-ku, Tokyo, Japan Tel: Fax: Analog Devices, Inc. Asia Pacific Headquarters Analog Devices 5F, Sandhill Plaza 229 Zuchongzhi Road Zhangjiang Hi-Tech Park Pudong New District Shanghai, China 2123 Tel: Fax: Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Ahead of What s Possible is a trademark of Analog Devices. GLDO-1/18 analog.com

PRECISION DAC SELECTOR GUIDE

PRECISION DAC SELECTOR GUIDE High Accuracy Low Power High Density 1011000111 Precision DAC 150 + db Low Noise Fast Settling Ease of Use Visit analog.com 2 Precision DAC Selector Guide CONTENTS Introduction