LT1085CM-3.3#PBF Linear Technology, LT1085CM-3.3#PBF Datasheet - Page 11

• 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 DESCRIPTIO
HATCHED AREA IS SOLDER PLATED
(1.524)
.060
HATCHED AREA IS SOLDER PLATED
BOTTOM VIEW OF TO-3P
BOTTOM VIEW OF DD PAK
COPPER HEAT SINK
COPPER HEAT SINK
RECOMMENDED SOLDER PAD LAYOUT
(14.224)
(8.255)
.560
.325
(6.502)
(7.620)
.256
.300
.100
.420
(1.524)
(1.905)
.075
.060
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
(14.732)
(4.648)
(3.149)
.580
.124
.183
(17.780)
(2.489)
(6.985)
.070
.700
.098
.275
.090
U
.350
(1.524)
.060
TYP
(21.08 – 22.10)
(19.81 – 20.32)
(8.382 – 9.398)
(
3.632
.830 – .870
.780 – .800
.330 – .370
.143
.565
3-Lead Plastic TO-3P (Similar to TO-247)
+0.305
–0.508
+.012
–.020
(14.73 – 15.24)
.580 – .6OO
(1.07 – 1.32)
.042 – .052
(1.88 – 2.13)
(4.32)
.074 – .084
.170
MAX
)
NOTE:
1. DIMENSIONS IN INCH/(MILLIMETER)
2. DRAWING NOT TO SCALE
(LTC DWG # 05-08-1460)
3-Lead Plastic DD Pak
(LTC DWG # 05-08-1450)
M Package
P Package
(1.270)
.050
(15.75 – 16.26)
.620 – .64O
(2.54)
.100
BSC
(9.906 – 10.541)
.390 – .415
(2.87 – 3.12)
.080
15°
.113 – .123
LT1083/LT1084/LT1085 Fixed
FOR THICKER SOLDER PASTE APPLICATIONS
.205
.320
(5.46)
RECOMMENDED SOLDER PAD LAYOUT
.215
BSC
(4.32 – 5.08)
EJECTOR PIN MARKS
.170 – .2OO
.100
(2.67 – 3.18)
.105 – .125
MOUNTING HOLE
(4.191 – 4.572)
.165 – .180
(2.92 – 3.68)
.115 – .145
DIA
(0.330 – 0.584)
.420
.276
DIA
.013 – .023
(1.499)
.059
18° – 22°
.070
3° – 7°
.090
.325
(1.143 – 1.397)
M (DD3) 0204
(
0.102
(2.413 – 2.921)
.045 – .055
.004
(1.270 ± 0.305)
.565
.095 – .115
.050 ± .012
+.008
–.004
+0.203
–0.102
)
(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
11
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