LTC3770_15 Datasheet, PDF (2/24 Pages) Linear Technology – Fast No RSENSE Step-Down Synchronous Controller with Margining, Tracking and PLL

LTC3770
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V_IN, V_INSNS) ............ 32V to –0.3V
Boosted Topside Driver Supply Voltage
BOOST ................................................... 38V to –0.3V
SENSE⁺, SW Voltage..................................... 32V to –5V
DRV_CC, (BOOST – SW) Voltages.................. 7V to –0.3V
V_ON, V_RNG, PGOOD Voltages .....INTV_CC + 0.3V to – 0.3V
PLLFLTR, I_TH, V_FB, V_REFIN Voltages .......... 2.7V to –0.3V
TRACK/SS, FCB, Z0, Z1, Z2, RUN, PLLIN, MARGIN0,
MARGIN1 Voltages ....................INTV_CC + 0.3V to – 0.3V
INTV_CC, ZV_IN Voltages.................................. 7V to –0.3V
TG, BG, INTV_CC Peak Currents ....................................4A
TG, BG, INTV_CC 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
PIN CONFIGURATION
RUN 1
V_ON 2
PGOOD 3
V_RNG 4
V_FB 5
I_TH 6
SGND 7
MARGIN1 8
MARGIN0 9
I_ON 10
V_REFIN 11
V_REFOUT 12
MPGM 13
TRACK/SS 14
TOP VIEW
28 FCB
27 Z0
26 BOOST
25 TG
24 SW
23 PGND
22 BG
21 INTV_CC
20 Z2
19 Z1
18 ZV_IN
17 V_IN
16 PLLIN
15 PLLFLTR
G PACKAGE
28-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 130°C/W
TOP VIEW
V_RNG 1
V_FB 2
32 31 30 29 28 27 26 25
24
23
SENSE⁺
SENSE^–
I_TH 3
22 PGND
SGND 4
MARGIN1 5
21 BG
33
20 DRV_CC
MARGIN0 6
19 INTV_CC
I_ON 7
V_REFIN 8
18 Z2
17 Z1
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
EXPOSED PAD IS SGND (PIN 33)
MUST BE SOLDERED TO THE PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3770EG#PBF
LTC3770EG#TRPBF
LTC3770EG
28-Lead Plastic SSOP
LTC3770EUH#PBF
LTC3770EUH#TRPBF 3770
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/
2
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
3770fc