ltc3728legn-trpbf Linear Technology Corporation, ltc3728legn-trpbf Datasheet - Page 2

• Manufacturer Part Number: ltc3728legn-trpbf
• Description: Dual, 550khz, 2-phase Synchronous Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

ABSOLUTE MAXIMUM RATINGS
LTC3728
Input Supply Voltage (V
Top Side Driver Voltages
(BOOST1, BOOST2) ................................... 42V to –0.3V
Switch Voltage (SW1, SW2) ......................... 36V to –5V
INTV
(BOOST2-SW2), PGOOD .............................. 7V to –0.3V
SENSE1
SENSE2
PLLIN, PLLFLTR, FCB, Voltage ............. INTV
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LTC3728EG#PBF
LTC3728EUH#PBF
LEAD BASED FINISH
LTC3728EG
LTC3728EUH
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
CC,
EXTV
+
–
, SENSE2
Voltages .........................(1.1)INTV
CC
V
V
RUN/SS1
SENSE1
SENSE1
SENSE2
SENSE2
PLLFLTR
, RUN/SS1, RUN/SS2, (BOOST1-SW1),
OSENSE1
3.3V
OSENSE2
PLLIN
SGND
I
I
FCB
OUT
+
TH1
TH2
, SENSE1
+
–
–
+
T
JMAX
TAPE AND REEL
LTC3728EG#TRPBF
LTC3728EUH#TRPBF
TAPE AND REEL
LTC3728EG#TR
LTC3728EUH#TR
28-LEAD PLASTIC SSOP
10
11
12
13
14
1
2
3
4
5
6
7
8
9
IN
= 125°C, θ
) .........................36V to – 0.3V
G PACKAGE
TOP VIEW
–
,
JA
= 95°C/W
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
http://www.linear.com/leadfree/
CC
CC
PART MARKING
3728
3728
PART MARKING
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
32-Lead (5mm × 5mm) Plastic QFN
PACKAGE DESCRIPTION
28-Lead Plastic SSOP
32-Lead (5mm × 5mm) Plastic QFN
CC
I
TH2
V
Peak Output Current ................................. 50mA
PLLFLTR
OSENSE1
3.3V
, V
PLLIN
SGND
EXPOSED PAD IS SGND (MUST BE SOLDERED TO PCB)
I
I
FCB
OUT
TH1
TH2
OSENSE1
1
2
3
4
5
6
7
8
32-LEAD (5mm × 5mm) PLASTIC QFN
32
9 10 11 12 13
T
JMAX
, V
31 30 29 28 27 26 25
OSENSE2
= 125°C, θ
UH PACKAGE
TOP VIEW
33
JA
= 34°C/W
Voltages ... 2.7V to –0.3V
14 15 16
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
TEMPERATURE RANGE
–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
3728fd