LTC3728LEGN-1#TRPBF Linear Technology, LTC3728LEGN-1#TRPBF Datasheet - Page 31

• Manufacturer Part Number: LTC3728LEGN-1#TRPBF
• Description: IC REG SYNC DUAL 28-SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3728LEGN-1#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 7 V
• Current - Output: 3A
• Frequency - Switching: 250kHz ~ 550kHz
• Voltage - Input: 4.5 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

PACKAGE DESCRIPTION
5.50 ±0.05
(4 SIDES)
4.10 ±0.05
3.50 REF
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
RECOMMENDED SOLDER PAD LAYOUT
.254 MIN
.0165 ± .0015
3.45 ± 0.05
.0075 – .0098
(0.19 – 0.25)
3.45 ± 0.05
RECOMMENDED SOLDER PAD LAYOUT
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
(0.406 – 1.270)
0.50 BSC
0.25 ± 0.05
.016 – .050
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.
0.70 ±0.05
(MILLIMETERS)
PACKAGE
OUTLINE
INCHES
0° – 8° TYP
28-Lead Plastic SSOP (Narrow .150 Inch)
(0.38 ± 0.10)
.015 ± .004
(Reference LTC DWG # 05-08-1693 Rev D)
32-Lead Plastic QFN (5mm × 5mm)
NOTE:
1. DRAWING PROPOSED TO BE A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
.045 ±.005
.150 – .165
M0-220 VARIATION WHHD-(X) (TO BE APPROVED)
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE
ON THE TOP AND BOTTOM OF PACKAGE
(Reference LTC DWG # 05-08-1641)
.0250 BSC
× 45°
PIN 1
TOP MARK
(NOTE 6)
GN Package
UH Package
5.00 ± 0.10
(4 SIDES)
(0.203 – 0.305)
(5.817 – 6.198)
.229 – .244
.008 – .012
TYP
.0532 – .0688
(1.35 – 1.75)
28
1
27
2 3
26
25
4
0.75 ± 0.05
24
5 6 7
(9.804 – 9.982)
23
.386 – .393*
(0.635)
.0250
22
BSC
(4-SIDES)
21
3.50 REF
8 9 10 11 12
0.00 – 0.05
0.200 REF
20
19 18 17
R = 0.05
TYP
1615
13 14
(0.102 – 0.249)
BOTTOM VIEW—EXPOSED PAD
.004 – .0098
R = 0.115
3.45 ± 0.10
(3.810 – 3.988)
TYP
LTC3728L-1
.150 – .157**
GN28 (SSOP) 0204
(0.838)
.033
REF
3.45 ± 0.10
31
PIN 1 NOTCH R = 0.30 TYP
OR 0.35 × 45° CHAMFER
0.50 BSC
(UH32) QFN 0406 REV D
0.25 ± 0.05
32
31
1
2
0.40 ± 0.10
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