5C, Viy = 8V (K Package Only) 3.270 3.300 3.330 V 0 < Igur < 5A, 4.8V < Vin < 15V (Note 8) e 3.235 3.300 3.365 V LT1085-3.3 Vin = 5V, loyt = OMA, Ty = 25C (K Package Only) 3.270 3.300 3.330 Vv 4.BV < Vin < 15V, 0 < lour < 3A (Note 8) @ | 3235 3300 3.365 V LT1085-3.6 Vin = 5V, Igur = OmA, Ty = 25C (K Package Only) 3.564 3.600 3.636 V 5V < Vin s 15V, 0 < Iqur < 3A (Note 8) e 3.500 3.672 Vv 5V < Vins 15V, 0 < four < 3A, TU > 0C (Note 8) 3.528 3.672 V 4-62 AT MM 5518468 0010073 762LT1083/LT1084/LT1085 Fixed ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX | UNITS Output Voltage LT1085-3.6 5V < Vin $ 15V, 0 < Ipur s 2.5A (Note 8) e 3.528 3.672 Vv Vin = 4.75V, lout = 3A, Ty = 0C 3.350 3.672 V Vin = 4.75V, lout = 2.5A, Ty 2 OC 3.450 3.672 V Vin = 4.75V, lout = 1.5A, Ty > 0C 3.528 3.672 V LT1083/4/5-5 lout = OMA, Ty = 25C, Vin = 8V (K Package Only) 4.950 5.000 5.050 v O< lout < Iructoap. 6.5V < Vin < 20V (Notes 3, 5, 6, 8} 4.900 5.000 5.100 V LT1083/4/5-12 Igyy = OMA, Ty = 25C, Vi
ER AREA OVER BACKSIDE GROUND PLANE OR INTERNAL POWER PLANE. JA CAN VARY FROM 20C/W TO > 40C/W DEPENDING ON MOUNTING TECHNIQUE. Consult factory for Industrial grade parts. ELECTRICAL CHARACTERISTICS PARAMETER Output Voltage CONDITIONS LT1084-3.3 LT1085-3.3 LT1085-3.6 2 IOUT = 0mA, TJ = 25C, VIN = 8V (K Package Only) 0 IOUT 5A, 4.8V VIN 15V (Note 8) VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 4.8V VIN 15V, 0 IOUT 3A (Note 8) VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 5V VIN 15V, 0 IOUT 3A (Note 8) 5V VIN 15V, 0 IOUT 3A, TJ 0C (Note 8) MIN 3.270 3.235 3.270 3.235 3.564 3.500 3.528 TYP 3.300 3.300 3.300 3.300 3.600 MAX 3.330 3.365 3.330 3.365 3.636 3.672 3.672 UNITS V V V V V V V LT1083/84/85 Fixed ELECTRICAL CHARACTERISTICS PARAMETER Output Voltage CONDITIONS LT1085-3.6 LT1084-3.3 5V VIN 15V, 0 IOUT 2.5A (Note 8) VIN = 4.75V, IOUT = 3A, TJ 0C VIN = 4.75V, IOUT = 2.5A, TJ 0C VIN = 4.75V, IOUT = 1.5A, TJ > 0C IOUT = 0mA, TJ = 25C, VIN = 8V (K Package Only) 0 IOUT IFULLOAD, 6.5V V
25C, Vin = 8V (K Package Only) 3.270 3.300 3.330 V 0 LT1085-3.6 Vin = 5V, lout = OmA, Ty = 25C (K Package Only) 3.564 3.600 3.636 V BV < Vin < 15V, 0 < lout < 3A (Note 8) e 3.500 3.672 V BV < Viy < 15V, 0 < Iqut < 3A, Td > 0C (Note 8) 3.528 3.672 VLT1083/84/85 Fixed ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX | UNITS Output Voltage LT1085-3.6 BV < Vin < 15V, 0 < Ioyr < 2.5A (Note 8) @ | 3528 3.672 V Viv = 4.75V, loyy = 3A, Ty 20C 3.350 3.672 V Vin = 4.75Y, loyr = 2.5A, Ty > 0C 3.450 3.672 V Viy = 4.75V, lout = 1.5A, Ty > 0C 3.528 3.672 V LT1083/4/5-5 Igy = OMA, Ty = 25C, Viy = BV (K Package Only) 4.950 5.000 5.050 V 0 < lout
ER AREA OVER BACKSIDE GROUND PLANE OR INTERNAL POWER PLANE. JA CAN VARY FROM 20C/W TO > 40C/W DEPENDING ON MOUNTING TECHNIQUE. Consult factory for Industrial grade parts. ELECTRICAL CHARACTERISTICS PARAMETER Output Voltage CONDITIONS LT1084-3.3 LT1085-3.3 LT1085-3.6 2 IOUT = 0mA, TJ = 25C, VIN = 8V (K Package Only) 0 IOUT 5A, 4.8V VIN 15V (Note 8) VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 4.8V VIN 15V, 0 IOUT 3A (Note 8) VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 5V VIN 15V, 0 IOUT 3A (Note 8) 5V VIN 15V, 0 IOUT 3A, TJ 0C (Note 8) MIN 3.270 3.235 3.270 3.235 3.564 3.500 3.528 TYP 3.300 3.300 3.300 3.300 3.600 MAX 3.330 3.365 3.330 3.365 3.636 3.672 3.672 UNITS V V V V V V V LT1083/84/85 Fixed ELECTRICAL CHARACTERISTICS PARAMETER Output Voltage CONDITIONS LT1085-3.6 LT1083/4/5-5 LT1083/4/5-12 Line Regulation LT1084-3.3 5V VIN 15V, 0 IOUT 2.5A (Note 8) VIN = 4.75V, IOUT = 3A, TJ 0C VIN = 4.75V, IOUT = 2.5A, TJ 0C VIN = 4.75V, IOUT = 1.5A, TJ > 0C IOUT = 0mA, TJ = 25C, VIN =
ar.com/LT1083 LT1083/LT1084/LT1085 Fixed Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. PARAMETER CONDITIONS Output Voltage LT1084-3.3 LT1085-3.3 LT1085-3.6 Line Regulation UNITS IOUT = 0mA, TJ = 25C, VIN = 8V (K Package Only) 4.8V VIN 15V, 0 IOUT IFULL_LOAD (Notes 3, 4, 9) l 3.270 3.235 3.300 3.300 3.330 3.365 V V VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 4.8V VIN 15V, 0 IOUT IFULL_LOAD (Notes 3, 4, 9) l 3.270 3.235 3.300 3.300 3.330 3.365 V V VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 5V VIN 15V, 0 IOUT IFULL_LOAD (Note 9) 5V VIN 15V, 0 IOUT IFULL_LOAD, TJ 0C (Notes 3, 4, 9) 3.564 3.500 3.528 3.600 l 3.636 3.672 3.672 V V V 3.672 3.672 3.672 3.672 V V V V LT1083/4/5-5 IOUT = 0mA, TJ = 25C, VIN = 8V (K Package Only) 0 IOUT IFULL_LOAD, 6.5V VIN 20V (Notes 4, 6, 7, 9) 4.950 4.900 5.000 5.000 5.050 5.100 V V LT1083/4/5-12 IOUT = 0mA, TJ = 25C, VIN = 15V (K Package Only) 0 IOUT IF
or The Power PC processor is bringing a new level of computing power to personal computers and workstations, but motherboard designers are faced with a new challenge: how to obtain a 3.6V regulated voltage to power the chip? The circuit shown here uses an LT1085-3.6 low dropout linear regulator to supply up to 3A of load current from a 5V supply. The LT1085-3.6 is fully specified for use with 5V logic inputs and will effectively regulate a 3.6V +2% output for these processor applications. All that is required is the LT1085-3.6 and an output capacitor to perform the step-down. 3.6V, 3A 5V INPUT in Our LT1086-3.6 tL joue tL. cour i [To L11085-3 6 + POT @ = o 1H A surface mount power DD package is available for on-card regulation without taking up much board space. The LT1085-3.6 can regulate from inputs as high as 28V, with a 3-lead TO-220 package offered to handle higher dissipation in these applications. The LT1086-3.6 is also available for 3.6V applications
.6 LT1085IM-3.6 LT1083/LT1084/LT1085 Fixed ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. PARAMETER CONDITIONS Output Voltage LT1084-3.3 LT1085-3.3 LT1085-3.6 3.300 3.300 3.330 3.365 V V VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 4.8V VIN 15V, 0 IOUT IFULLOAD (Notes 3, 4, 9) 3.270 3.235 3.300 3.300 3.330 3.365 V V 3.564 3.500 3.528 3.600 3.636 3.672 3.672 V V V 3.672 3.672 3.672 3.672 V V V V VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 5V VIN 15V, 0 IOUT IFULLOAD (Note 9) 5V VIN 15V, 0 IOUT IFULLOAD, TJ 0C (Notes 3, 4, 9) LT1083/4/5-5 IOUT = 0mA, TJ = 25C, VIN = 8V (K Package Only) 0 IOUT IFULLOAD, 6.5V VIN 20V (Notes 4, 6, 7, 9) LT1085-3.6 LT1083/4/5-5 UNITS 3.270 3.235 5V VIN 15V, 0 IOUT 2.5A (Notes 3, 4, 9) VIN = 4.75V, IOUT = 3A, TJ 0C VIN = 4.75V, IOUT = 2.5A, TJ 0C VIN = 4.75V, IOUT = 1.5A, TJ > 0C LT1085-3.3 MAX LT1085-3.6 LT1084-3.3 TYP IOUT = 0mA,
nges. 1083ffd 2 LT1083/LT1084/LT1085 Fixed ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. PARAMETER CONDITIONS Output Voltage LT1084-3.3 LT1085-3.3 LT1085-3.6 3.300 3.300 3.330 3.365 V V VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 4.8V VIN 15V, 0 IOUT IFULLOAD (Notes 3, 4, 9) 3.270 3.235 3.300 3.300 3.330 3.365 V V 3.564 3.500 3.528 3.600 3.636 3.672 3.672 V V V 3.672 3.672 3.672 3.672 V V V V VIN = 5V, IOUT = 0mA, TJ = 25C (K Package Only) 5V VIN 15V, 0 IOUT IFULLOAD (Note 9) 5V VIN 15V, 0 IOUT IFULLOAD, TJ 0C (Notes 3, 4, 9) LT1083/4/5-5 IOUT = 0mA, TJ = 25C, VIN = 8V (K Package Only) 0 IOUT IFULLOAD, 6.5V VIN 20V (Notes 4, 6, 7, 9) LT1085-3.6 LT1083/4/5-5 IOUT = 0mA, TJ = 25C, 4.8V VIN 15V 4.8V VIN 15V, IOUT = 0mA, TJ= 25C 4.8V VIN 15V, IOUT = 0mA, TJ= 25C IOUT = 0mA, TJ = 25C, 6.5V VIN 20V (Notes 2, 3) LT1083/4/5-12 IOUT = 0mA, TJ = 25C, 13.5V VIN 25V (Notes 2, 3) Load
Viy = 8V (K Package Only) 3.270 3.300 3.330 Vv 0 < lout < 5A, 4.8V < Vin s 15V (Note 8) e 3.235 3.300 3.365 Vv LT1085-3.3 Vin = 5V, lout = OmA, Ty = 25C (K Package Only) 3.270 3.300 3.330 Vv 4.BV < Vin < 15V, 0 < lou < 3A (Note 8) @ | 3235 3.300 3.365 Vv LT1085-3.6 Vin = 5V. lout = OMA, Ty = 25C (K Package Only) 3.564 3.600 3.636 v 5V < Vin < 15V, 0 < Igyr $ 3A (Note 8) e@ | 3.500 3.672 Vv 5V < Vin < 15V, 0 < Igyt < 3A, Td > 0C (Note 8) 3.528 3.672 v 4-62 LT Whee MB 5518468 0010073 762 aLT1083/LT1084/LT1085 Fixed ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX | UNITS Output Voltage LT1085-3.6 5V < Vin s 15V, 0 < Ipyt < 2.5A (Note 8) e 3.528 3.672 Vv Vin = 4.75V, lout = 3A, Ty > 0C 3.350 3.672 Vv Vin = 4.75V, lout = 2.5A, Ty > OC 3.450 3.672 Vv Vin = 4.75V, lout = 1.5A, Ty > 0C 3,528 3.672 Vv LT1083/4/5-5 lout = OMA, Ty = 25C, Vin = 8V (K Package Only) 4,950 5.000 5.050 Vv 0< lout S Iructoap, 6.5V < Vin < 20V (Notes 3, 5, 6, 8) 4.900 5.000 5.100 Vv L1083/4/5-12 Iqyy = OM
0.150A) LT1585-3.3 (4.6A)* LT1529-5 (3A) LT1129 (0.700A)*: ** LT1585A-3.3 (5A) LT1521 (0.3A) LT1587-3.3 (3A)* LT1529 (3A) reed 7A} Fixed 2.5V Fixed 3.0V Fixed 3.38V| | Fixed 3.6V Fixed 12V LT1585 (4.6A)* LT1118 (0.8A/-0.4A) LT1521-3 (0.3) L11584-3.38 (7A) LT1085-3.6 (3A)* LT1083-12 (7.54) LT1585A (5A) LT1580-2.5(7A) LT1585-3.38 (44}" LT1086-3.6.(1.5A)* - LT1084-12 (5A) LT1587 (3A) LT1584-3.6 (7A) LT1085-12 (3A) LT1585-3.6 (4A)* LT1086-12 (1.5A) wn LT1587-3.6 (3A) Qo co tr 3V Dropout | qo 5) mel Adjustable Fixed 5V Logic Controlled n iS LT123A/323A (3A) LT1005 (5V, 14) LM123/323 (3A) LT1035 (5V, 3A) LT1003 (5A) LT1036 (12V, 3A) 1%V REF A% Vere LT117A/917A (1.5) LM138/338 (5V) LT138A/338A (5A) LM150/350 (3A) * Available in surface mount DD package LT1083 (10A) LM117/317 (1.5A) ** Available in surface mount SOT223 package | | Low Dropout w/Remote Sense LT1087 (3A) | Negative Low Dropout 3V Dropout rid Adjustable Fixed -5V LT1185 (3A) LT1175-5 (500mA} Adjustable LT1175 (500mA) 1%V rer 4% Veer LT137A/
7. aa LT1585-3.38 (4A)* LT1585-3.45 (4A)* LT1084-12 (5A) LT1084 (5A LT1587-3.45 (3A) LT1085-12 (3A) LT1085 (3A LT1086-12 (1.5A) LT1086 (1. 3A) LTV117 (0.84) Fixed 3.6V Fixed 2.85V LTi120 (0.1258) Fixed 3.3V . Fixed 5V d 2. LT1120A (0.125A) LT1084-3.3 (5A) LT1085-3.6 (34)* LT1083-5 (7.5A) LT1086-2.85 (1.5A) [T1121 (0.1508) L11085-3.3 (3A LT1086-3.6 (1.5A)* LT1084-5 (5A) LT1117-2.85 (0.8A) LT1129 (0.700A)""** 1 14986-3.3 (1.5A LT1585-3.6 (4A)* LT1085-5 (3A) LT1584 (7A) LT1117-3.3 (0. BA)" LT1086-5 (1.5A) LT1585 (4.6) LT1421-3.3 (0.15A) LT1117-5 (0.8A)** LT1587 (3A) LT1129-3.3 (0. a LT1121-5 (0.15A)** LT1584-3.3 (7A L11123 (pnp Driver)** LT1585-3.3 (4. BA) LT1129-5 (0.7A)** LT1587-3.3 (3A)* 7 ~=3V Dropout Adjustable Fixed 5V Logic Controlled LT123A/323A (3A) LT1005 (5V, 1A) LM123/323 (3A) LT1035 (5V, 3A) LT1003 (5A) LT1036 (12V, 3A) 1%Vrer A% VREF LT117A/317A (1.5) LM138/338 (5V) LT138A/338A (5A) LM150/350 (3A) * Available in surface-mount DD package LT1083 (104) LM117/317 (1.5A) ** Available in sur
.3A) LT1763-5 (0.5A) LT1129-5 (0.7A)*, ** LT1117-5 (0.8A)** LT1118-5 (0.8A/-0.4A) LT1086-5 (1.5A) LT1085-5 (3A) LT1529-5 (3A)* LT1084-5 (5A) LT1083-5 (7.5A) LT1123 (PNP Driver)** Fixed 3.38V Fixed 3.6V LT1585-3.38 (4A)* LT1584-3.38 (7A) LT1086-3.6 (1.5A)* LT1085-3.6 (3A)* LT1587-3.6 (3A) LT1585-3.6 (4A)* LT1584-3.6 (7A) Fixed 3.0V Fixed 2.5V LT1587-3.45 (3A)* LT1585-3.45 (4A)* LT1584-3.45 (7A) Dual Input LT1579 (0.3A) LT1579-3 (0.3A) LT1579-3.3 (0.3A) LT1579-5 (0.3A) Fixed 12V LT1086-12 (1.5A) LT1085-12 (3A) LT1084-12 (5A) LT1083-12 (7.5A) Selection Guides LT1761 (0.1A) LT1762 (0.15A) LT1020 (0.125A) LT1120 (0.125A) LT1120A (0.125A) LT1121 (0.150A) LT1962 (0.3A) LT1521 (0.3A)** LT1579 (0.3A) LT1763 (0.5A) LT1129 (0.700A)*, ** LT1117 (0.8A)*, ** LT1963 (1.5A)*,** LT1086 (1.5A)* LT1085 (3A)* LT1528 (3A)* LT1529 (3A)* LT1587 (3A)* LT1764 (3A)* LT1585 (4.6A)* LT1084 (5A) LT1585A (5A) LT1580 (7A) LT1584 (7A) LT1083 (7.5A) LT1581 (10A) LT1761-2.8 (0.1A) LT1117-2.85 (0.8A) LT1118-2.85 (0.8A/- 0.4A) LT10
3A) LT1763-5 (0.5A) , LT1129-5 (0.7A)* ** LT1117-5 (0.8A)** LT1118-5 (0.8A/-0.4A) LT1086-5 (1.5A) LT1085-5 (3A) LT1529-5 (3A)* LT1084-5 (5A) LT1083-5 (7.5A) LT1123 (PNP Driver)** Fixed 3.38V Fixed 3.6V LT1585-3.38 (4A)* LT1584-3.38 (7A) LT1086-3.6 (1.5A)* LT1085-3.6 (3A)* LT1587-3.6 (3A) LT1585-3.6 (4A)* LT1584-3.6 (7A) Fixed 3.0V Fixed 2.5V Fixed 3.45V Fixed 12V LT1086-12 (1.5A) LT1085-12 (3A) LT1084-12 (5A) LT1083-12 (7.5A) Low Dropout w/Remote Sense LT1087 (5A) Positive UltraFastTM Transient Response Low Dropout, High Current Single Controllers LT1575 LT1575-1.5 LT1575-2.8 LT1575-3.3 LT1575-3.5 LT1575-5 LT1573 LT1573-2.5 LT1573-2.8 LT1573-3.3 Dual Controllers LT1577-Adj/Adj LT1577-3.3/Adj LT1577-3.3/2.8 Positive Standard Adjustable 4% VREF 1% VREF LT117A/317A (1.5A) LT138A/338A (5A) LT1083 (10A) Fixed 5V LT123A/323A (3A) LM123/323 (3A) LT1003 (5A) Logic Controlled LT1005 (5V, 1A) LT1035 (5V, 3A) LT1036 (12V, 3A) LM117/317 (1.5A) LM150/350 (3A) LM138/338 (5V) Negative Low Dropout Adjustable Fix