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LTC3770 Datasheet, PDF (2/24 Pages) Linear Technology – Synchronous Controller with Margining, Tracking and PLL
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LTC3770
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (VIN, VINSNS) ............32V to – 0.3V
Boosted Topside Driver Supply Voltage
(BOOST) ................................................38V to – 0.3V
SENSE+, SW Voltage ....................................32V to – 5V
DRVCC, (BOOST – SW) Voltages .................7V to – 0.3V
VON, VRNG, PGOOD Voltages .... INTVCC + 0.3V to – 0.3V
PLLFLTR, ITH, VFB, VREFIN Voltages ..........2.7V to – 0.3V
TRACK/SS, FCB, Z0, Z1, Z2, RUN, PLLIN, MARGIN0,
MARGIN1 Voltages ............... INTVCC + 0.3V to – 0.3V
INTVCC, ZVIN Voltages .................................7V to – 0.3V
TG, BG, INTVCC Peak Currents ................................... 4A
TG, BG, INTVCC RMS Currents ............................. 50mA
Operating Ambient Temperature
Range (Note 4) ................................... – 40°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range ................. – 65°C to 125°C
QFN Reflow Peak Body Temperature .................... 245°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RUN 1
VON 2
PGOOD 3
VRNG 4
VFB 5
ITH 6
SGND 7
MARGIN1 8
MARGIN0 9
ION 10
VREFIN 11
VREFOUT 12
MPGM 13
TRACK/SS 14
28 FCB
27 Z0
26 BOOST
25 TG
24 SW
23 PGND
22 BG
21 INTVCC
20 Z2
19 Z1
18 ZVIN
17 VIN
16 PLLIN
15 PLLFLTR
G PACKAGE
28-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 130°C/ W
ORDER PART
NUMBER
LTC3770EG
G PART
MARKING
LTC3770EG
TOP VIEW
VRNG 1
VFB 2
32 31 30 29 28 27 26 25
24
23
SENSE+
SENSE–
ITH 3
22 PGND
SGND 4
MARGIN1 5
21 BG
33
20 DRVCC
MARGIN0 6
19 INTVCC
ION 7
18 Z2
VREFIN 8
17 Z1
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/ W
EXPOSED PAD IS SGND (PIN 33)
MUST BE SOLDERED TO THE PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC3770EUH
UH PART
MARKING
3770
3770f
2
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