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LTC3633EUFD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
LTC3633
25
3633fd
For more information www.linear.com/LTC3633
TYPICAL APPLICATIONS
1.2V/1.8V Buck Regulator with Coincident Tracking and 6V Input UVLO
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
RUN1
RUN2
RT
LTC3633
BOOST2
3633 TA03
0.1µF
L2
0.47µH
R4
10k
R3
10k
SW2
V
ON2
V
IN2
V
IN1
V
FB2
BOOST1
SW1
V
ON1
V
FB1
C
OUT2
68µF
V
OUT2
1.2V AT 3A
0.1µF
L1
0.68µH
R6
4.99k
R1
10k
C
OUT1
47µF
V
OUT1
1.8V AT 3A
V
IN
3.6V TO 15V
C1
47µF
×2
R5
162k
R7
154k
R8
40k
TRACKSS2
R2
15k
MODE/SYNC
ITH1
ITH2
INTV
CC
C2
2.2µF
V2P5
PHMODE
PGNDSGND
FE28 (EB) TSSOP REV J 1012
0.09 – 0.20
(.0035 – .0079)
0° – 8°
0.25
REF
0.50 – 0.75
(.020 – .030)
4.30 – 4.50*
(.169 – .177)
1 3 4
5
6
7
8 9 10
11
12 13 14
192022 21 151618 17
9.60 – 9.80*
(.378 – .386)
4.75
(.187)
2.74
(.108)
28 27 26 2524 23
1.20
(.047)
MAX
0.05 – 0.15
(.002 – .006)
0.65
(.0256)
BSC
0.195 – 0.30
(.0077 – .0118)
TYP
2
RECOMMENDED SOLDER PAD LAYOUT
EXPOSED
PAD HEAT SINK
ON BOTTOM OF
PACKAGE
0.45 ±0.05
0.65 BSC
4.50 ±0.10
6.60 ±0.10
1.05 ±0.10
4.75
(.187)
2.74
(.108)
MILLIMETERS
(INCHES)
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
SEE NOTE 4
4. RECOMMENDED MINIMUM PCB METAL SIZE
FOR EXPOSED PAD ATTACHMENT
6.40
(.252)
BSC
FE Package
28-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663 Rev J)
Exposed Pad Variation EB
LTC3633
26
3633fd
For more information www.linear.com/LTC3633
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
4.00 ± 0.10
(2 SIDES)
2.50 REF
5.00 ± 0.10
(2 SIDES)
NOTE:
1. DRAWING PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220 VARIATION (WXXX-X).
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1
TOP MARK
(NOTE 6)
0.40 ±
0.10
27 28
1
2
BOTTOM VIEW—EXPOSED PAD
3.50 REF
0.75 ± 0.05
R = 0.115
TYP
R = 0.05
TYP
PIN 1 NOTCH
R = 0.20 OR 0.35
× 45° CHAMFER
0.25 ± 0.05
0.50 BSC
0.200 REF
0.00 – 0.05
(UFD28) QFN 0506 REV B
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
0.70 ±0.05
0.25 ±0.05
0.50 BSC
2.50 REF
3.50 REF
4.10 ± 0.05
5.50 ± 0.05
2.65 ± 0.05
3.10 ± 0.05
4.50
± 0.05
PACKAGE OUTLINE
2.65 ± 0.10
3.65 ± 0.10
3.65 ± 0.05
UFD Package
28-Lead Plastic QFN (4mm × 5mm)
(Reference LTC DWG # 05-08-1712 Rev B)
LTC3633
27
3633fd
For more information www.linear.com/LTC3633
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.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER
A 11/11 Updated Typical Application and Graph.
Updated Absolute Maximum Ratings section.
Updated • statement and Note 3 on Electrical Characteristics section.
Updated graphs G04, G05, G10 in Typical Performance Characteristics section.
Updated Block Diagram.
Updated Typical Application.
1
2
3, 4
5, 6
10
28
B 6/12 Clarified Absolute Maximum Ratings.
Clarified Parametric Table.
Clarified Pin Functions.
Clarified Block Diagram.
2
3, 4
8, 9
10
C 12/13 Clarified Absolute Maximum Ratings 2
D 5/15 Clarified I
LIM
limits.
Clarified Inductor Selection.
3
13
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28

LTC3633EUFD#PBF

Mfr. #:
Buy LTC3633EUFD#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Dual 3A, 15Vin, 4MHz, Monolithic Synchronous Step-Down Regulator
Lifecycle:
New from this manufacturer.
Delivery:
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