LT1085CM-3.3#PBF Linear Technology, LT1085CM-3.3#PBF Datasheet - Page 17

• Manufacturer Part Number: LT1085CM-3.3#PBF
• Description: IC LDO REG FIXED 3.3V 3A DDPAK-3
• Manufacturer: Linear Technology

Specifications of LT1085CM-3.3#PBF

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 25V
• Voltage - Dropout (typical): 1.3V @ 3A
• Number Of Regulators: 1
• Current - Output: 3A
• Current - Limit (min): 3.2A
• Operating Temperature: 0°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-2, D⊃2Pak (2 leads + Tab), TO-263AB
• Primary Input Voltage: 20V
• Output Voltage Fixed: 3.3V
• Dropout Voltage Vdo: 1.3V
• No. Of Pins: 3
• Output Current: 3A
• Operating Temperature Range: 0°C To +125°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Voltage Regulator Type: Linear
• Topology: LDO
• Regulator Output Type: Fixed
• Polarity Type: Positive
• Number Of Outputs: Single
• Input Voltage (min): 4.3V
• Input Voltage (max): 25V
• Output Voltage: 3.3V
• Package Type: DDPAK
• Power Dissipation: 30W
• Load Regulation: 0.1%
• Line Regulation: 0.015%
• Output Voltage Accuracy: ±1%
• Operating Temp Range: 0C to 150C
• Operating Temperature Classification: Commercial
• Dropout Voltage@current (max): 1.5@3A
• Dropout Voltage@current (typ): 1.3@3A
• Pin Count: 3 +Tab
• Mounting: Surface Mount
• Quiescent Current (max): 10mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PACKAGE DESCRIPTION
HATCHED AREA IS SOLDER PLATED
BOTTOM VIEW OF TO-3P
COPPER HEAT SINK
(14.224)
(8.255)
.560
.325
(24.892 – 27.178)
.980 – 1.070
(14.732)
(3.149)
.580
.124
(9.906 – 10.541)
(11.684 – 12.700)
(13.208 – 14.478)
(17.780)
(2.489)
.390 – .415
(6.985)
.520 – .570
.460 – .500
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
.700
.098
.275
(2.540)
.100
BSC
(0.711 – 0.965)
(21.08 – 22.10)
(19.81 – 20.32)
.028 – .038
.830 – .870
.780 – .800
3-Lead Plastic TO-3P (Similar to TO-247)
(14.73 – 15.24)
.580 – .6OO
(1.07 – 1.32)
.042 – .052
(1.88 – 2.13)
(4.32)
.074 – .084
.170
MAX
(Reference LTC DWG # 05-08-1420)
(Reference LTC DWG # 05-08-1450)
3-Lead Plastic TO-220
(5.842 – 6.858)
(8.382 – 9.398)
(5.537 – 6.401)
(1.270)
.050
.230 – .270
.330 – .370
.218 – .252
TYP
T Package
P Package
(3.734 – 3.937)
(15.75 – 16.26)
.147 – .155
.620 – .64O
(14.478 – 15.748)
DIA
.570 – .620
(2.87 – 3.12)
.113 – .123
(5.46)
.215
BSC
(4.191 – 4.572)
(0.330 – 0.584)
(4.32 – 5.08)
EJECTOR PIN MARKS
.170 – .2OO
.165 – .180
LT1083/LT1084/LT1085
.013 – .023
(2.67 – 3.18)
.105 – .125
MOUNTING HOLE
(2.92 – 3.68)
.115 – .145
DIA
DIA
18° – 22°
(1.143 – 1.397)
(2.413 – 2.921)
3° – 7°
.095 – .115
.045 – .055
T3 (TO-220) 0801
(4.75 – 5.26)
(2.21 – 2.59)
(0.51 – 1.02)
.187 – .207
.087 – .102
.020 – .040
(1.52 – 2.03)
.060 – .080
P3 0801
17
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