LTC3728EUH#TR Linear Technology, LTC3728EUH#TR Datasheet - Page 2

• Manufacturer Part Number: LTC3728EUH#TR
• Description: IC SW REG SYNC STP-DN DUAL 32QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3728EUH#TR

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 5.5 V
• Current - Output: 3A
• Frequency - Switching: 250kHz ~ 550kHz
• Voltage - Input: 3.5 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LTC3728EUHTR

ABSOLUTE MAXIMUM RATINGS
LTC3728
Input Supply Voltage (V
Topside Driver Voltages
Switch Voltage (SW1, SW2) ......................... 36V to –5V
INTV
(BOOST1-SW1), (BOOST2-SW2), PGOOD ..... 7V to –0.3V
SENSE1
SENSE2
PLLIN, PLLFLTR, FCB Voltages ............ INTV
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LTC3728EG#PBF
LTC3728IG#PBF
LTC3728EUH#PBF
LTC3728IUH#PBF
LEAD BASED FINISH
LTC3728EG
LTC3728IG
LTC3728EUH
LTC3728IUH
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
(BOOST1, BOOST2) ............................... 42V to –0.3V
CC,
EXTV
+
–
, SENSE2
Voltages .........................(1.1)INTV
T
JMAX
CC
, RUN/SS1, RUN/SS2,
V
V
= 125°C, θ
RUN/SS1
SENSE1
SENSE1
PLLFLTR
SENSE2
SENSE2
OSENSE1
3.3V
OSENSE2
PLLIN
SGND
I
I
+
FCB
OUT
TH1
TH2
, SENSE1
+
–
–
+
28-LEAD PLASTIC SSOP
10
11
12
13
14
TAPE AND REEL
LTC3728EG#TRPBF
LTC3728IG#TRPBF
LTC3728EUH#TRPBF
LTC3728IUH#TRPBF
TAPE AND REEL
LTC3728EG#TR
LTC3728IG#TR
LTC3728EUH#TR
LTC3728IUH#TR
1
2
3
4
5
6
7
8
9
JA
68º C/W - 4 LAYER
IN
= 90°C/W - SINGLE LAYER BOARD
G PACKAGE
TOP VIEW
) .........................36V to – 0.3V
–
,
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PGOOD
TG1
SW1
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
SW2
TG2
RUN/SS2
IN
CC
CC
http://www.linear.com/leadfree/
PART MARKING*
LTC3728EG
LTC3728IG
3728
3728
PART MARKING*
LTC3728EG
LTC3728IG
3728
3728
CC
CC
http://www.linear.com/tapeandreel/
to –0.3V
to –0.3V
(Note 1)
I
Peak Output Current <10μs (TG1, TG2, BG1, BG2) .....3A
INTV
Operating Temperature Range (Note 7).... –40°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range ................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
(G Package Only) .................................................. 300°C
TH1,
PACKAGE DESCRIPTION
28-Lead Plastic SSOP
28-Lead Plastic SSOP
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
PACKAGE DESCRIPTION
28-Lead Plastic SSOP
28-Lead Plastic SSOP
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
CC
I
TH2
Peak Output Current ................................. 50mA
, V
EXPOSED PAD IS SGND (MUST BE SOLDERED TO PCB)
OSENSE1
V
PLLFLTR
OSENSE1
3.3V
PLLIN
SGND
I
I
FCB
OUT
TH1
TH2
1
2
3
4
5
6
7
8
32-LEAD (5mm × 5mm) PLASTIC QFN
T
JMAX
, V
32
9 10 11 12 13
31 30 29 28 27 26 25
OSENSE2
= 125°C, θ
UH PACKAGE
TOP VIEW
33
JA
= 34°C/W
14 15 16
Voltages ... 2.7V to –0.3V
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
24
23
22
21
20
19
18
17
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
IN
CC
CC
3728fg