LTC3728_15 Datasheet, PDF (2/36 Pages) Linear Technology – Dual, 550kHz, 2-Phase Synchronous Step-Down Switching Regulator

LTC3728
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (V_IN) .........................36V to – 0.3V
Topside Driver Voltages
(BOOST1, BOOST2) ............................... 42V to –0.3V
Switch Voltage (SW1, SW2) ......................... 36V to –5V
INTV_CC, EXTV_CC, RUN/SS1, RUN/SS2,
(BOOST1-SW1), (BOOST2-SW2), PGOOD ..... 7V to –0.3V
SENSE1⁺, SENSE2⁺, SENSE1^–,
SENSE2^– Voltages .........................(1.1)INTV_CC to –0.3V
PLLIN, PLLFLTR, FCB Voltages ............ INTV_CC to –0.3V
I_TH1, I_TH2, V_OSENSE1, V_OSENSE2 Voltages ... 2.7V to –0.3V
Peak Output Current <10μs (TG1, TG2, BG1, BG2).....3A
INTV_CC Peak Output Current ................................. 50mA
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
PIN CONFIGURATION
RUN/SS1 1
SENSE1⁺ 2
SENSE1^– 3
V_OSENSE1 4
PLLFLTR 5
PLLIN 6
FCB 7
I_TH1 8
SGND 9
3.3V_OUT 10
I_TH2 11
V_OSENSE2 12
SENSE2^– 13
SENSE2⁺ 14
TOP VIEW
28 PGOOD
27 TG1
26 SW1
25 BOOST1
24 V_IN
23 BG1
22 EXTV_CC
21 INTV_CC
20 PGND
19 BG2
18 BOOST2
17 SW2
16 TG2
15 RUN/SS2
G PACKAGE
28-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 90°C/W - SINGLE LAYER BOARD
68º C/W - 4 LAYER
TOP VIEW
32 31 30 29 28 27 26 25
V_OSENSE1 1
PLLFLTR 2
PLLIN 3
24 BOOST1
23 V_IN
22 BG1
FCB 4
I_TH1 5
SGND 6
33
21 EXTVCC
20 INTV_CC
19 PGND
3.3V_OUT 7
I_TH2 8
18 BG2
17 BOOST2
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD IS SGND (MUST BE SOLDERED TO PCB)
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3728EG#PBF
LTC3728EG#TRPBF
LTC3728EG
28-Lead Plastic SSOP
–40°C to 85°C
LTC3728IG#PBF
LTC3728IG#TRPBF
LTC3728IG
28-Lead Plastic SSOP
–40°C to 85°C
LTC3728EUH#PBF
LTC3728EUH#TRPBF 3728
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3728IUH#PBF
LTC3728IUH#TRPBF
3728
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 85°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3728EG
LTC3728EG#TR
LTC3728EG
28-Lead Plastic SSOP
–40°C to 85°C
LTC3728IG
LTC3728IG#TR
LTC3728IG
28-Lead Plastic SSOP
–40°C to 85°C
LTC3728EUH
LTC3728EUH#TR
3728
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3728IUH
LTC3728IUH#TR
3728
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
3728fg
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