LTC3728LEUH#TRPBF Linear Technology, LTC3728LEUH#TRPBF Datasheet - Page 2

• Manufacturer Part Number: LTC3728LEUH#TRPBF
• Description: IC REG SW DUAL 2PH STPDWN 32QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3728LEUH#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: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

ABSOLUTE MAXIMUM RATINGS
LTC3728L/LTC3728LX
Input Supply Voltage (V
Topside Driver Voltages
Switch Voltage (SW1, SW2) ........................ 30V to –5V
INTV
(BOOST1-SW1), (BOOST2-SW2), PGOOD .... 7V to –0.3V
SENSE1
SENSE2
PLLIN, PLLFLTR, FCB Voltages ............ INTV
PIN CONFIGURATION
2
(BOOST1, BOOST2) .............................. 36V to –0.3V
CC,
EXTV
+
–
, SENSE2
Voltages ........................ (1.1)INTV
CC
V
V
RUN/SS1
SENSE1
PLLFLTR
SENSE2
SENSE2
OSENSE1
3.3V
OSENSE2
, RUN/SS1, RUN/SS2,
SENSE
PLLIN
SGND
I
I
FCB
OUT
TH1
TH2
+
28-LEAD NARROW PLASTIC SSOP
, SENSE1
+
–
–
+
T
JMAX
10
11
12
13
14
1
2
3
4
5
6
7
8
9
IN
= 125°C, θ
GN PACKAGE
) ........................ 30V to – 0.3V
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
CC
CC
CC
CC
to –0.3V
to –0.3V
(Note 1)
I
Peak Output Current <10μs (TG1, TG2, BG1, BG2) .... 3A
INTV
Operating Temperature Range (Note 7)
Junction Temperature (Note 2) ............................ 125°C
Storage Temperature Range .................. –65°C to 125°C
Refl ow Peak Body Temperature (UH Package) ..... 260°C
Lead Temperature (Soldering, 10 sec)
TH1,
LTC3728LC/LTC3728LXC ........................ 0°C to 85°C
LTC3728LE/LTC3728LI ........................ –40°C to 85°C
(GN Package) .................................................... 300°C
CC
I
TH2
V
PLLFLTR
Peak Output Current ................................. 40mA
OSENSE1
3.3V
EXPOSED PAD IS SGND (PIN 33), MUST BE SOLDERED TO PCB
, V
PLLIN
SGND
I
I
FCB
OUT
TH1
TH2
OSENSE1
1
2
3
4
5
6
7
8
32-LEAD (5mm × 5mm) PLASTIC QFN
32 31 30 29 28 27 26 25
9 10 11 12 13
T
, V
JMAX
OSENSE2
= 125°C, θ
UH PACKAGE
TOP VIEW
33
JA
14 15 16
= 34°C/W
Voltages ... 2.7V to –0.3V
24
23
22
21
20
19
18
17
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
IN
CC
CC
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