LTC3731H_15 Datasheet, PDF (2/34 Pages) Linear Technology – 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller

LTC3731H
Absolute Maximum Ratings
(Note 1)
Topside Driver Voltages (BOOST_N)............. 38V to –0.3V
Switch Voltage (SW_N)................................... 32V to –5V
Boosted Driver Voltage (BOOST_N – SW_N).... 7V to –0.3V
Peak Output Current <1ms (TG_N, BG_N)........................5A
Supply Voltages (V_CC, V_DR), PGOOD
Pin Voltage................................................... 7V to –0.3V
RUN/SS, PLLFLTR, PLLIN, UVADJ,
FCB Voltages ..............................................V_CC to –0.3V
SENSE⁺, SENSE^– Voltages......................... 5.5V to –0.3V
I_TH Voltage ................................................ 2.4V to –0.3V
Operating Junction
Temperature Range (Note 2).................. –40°C to 140°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature G Package (Soldering, 10sec).. 300°C
Pin Configuration
TOP VIEW
V_CC 1
PLLIN 2
PLLFLTR 3
FCB 4
NC 5
NC 6
NC 7
EAIN 8
SGND 9
SENSE1⁺ 10
SENSE1^– 11
SENSE2⁺ 12
SENSE2^– 13
SENSE3^– 14
SENSE3⁺ 15
RUN/SS 16
I_TH 17
UVADJ 18
36 CLKOUT
35 PGOOD
34 BOOST1
33 TG1
32 SW1
31 BOOST2
30 TG2
29 SW2
28 V_DR
27 BG1
26 PGND
25 BG2
24 BG3
23 SW3
22 TG3
21 BOOST3
20 PHASMD
19 SGND
G PACKAGE
36-LEAD PLASTIC SSOP
T_JMAX = 140°C, θ_JA = 70°C/W, θ_JC = 25°C/W
PINS 5 AND 6 CAN BE GROUNDED OR NC
PIN 7 MUST BE LEFT AS NC
TOP VIEW
32 31 30 29 28 27 26 25
NC 1
24 BOOST2
NC 2
23 TG2
EAIN 3
SENSE1⁺ 4
SENSE1^– 5
SENSE2⁺ 6
SENSE2^– 7
SENSE3^– 8
33
SGND
22 SW2
21 V_CC
20 BG1
19 PGND
18 BG2
17 BG3
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm s 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W, θ_JC = 3°C/W
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
PINS 1, 2 AND 32 MUST BE LEFT AS NC
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3731HG#PBF
LTC3731HG#TRPBF
LTC3731HG
36-Lead Plastic SSOP
LTC3731HUH#PBF
LTC3731HUH#TRPBF 3731
32-Lead (5mm × 5mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/

TEMPERATURE RANGE
–40°C to 140°C
–40°C to 140°C
3731Hfb