LTC3727LX-1_15 Datasheet, PDF (2/28 Pages) Linear Technology – High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator

LTC3727LX-1
ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage (V_IN).........................32V to – 0.3V
Top Side Driver Voltages
(BOOST1, BOOST2) ...................................40V to – 0.3V
Switch Voltage (SW1, SW2) .........................32V to – 5V
INTV_CC, EXTV_CC, (BOOST1-SW1),
(BOOST2-SW2) ........................................8.5V to – 0.3V
RUN/SS1, RUN/SS2, PGOOD ..................... 7V to – 0.3V
SENSE1⁺, SENSE2 ⁺, SENSE1^–,
SENSE2 ^– Voltages .....................................14V 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 2)..... – 40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature
(Soldering, 10 sec, G Package)............................. 300°C
Solder Reflow Temperature (UH Package) ........... 265°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
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
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 = 95°C/W
ORDER PART
NUMBER
TOP VIEW
ORDER PART
NUMBER
LTC3727LXEG-1
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
21 EXTV_CC
33
20 INTV_CC
19 PGND
3.3V_OUT 7
I_TH2 8
18 BG2
17 BOOST2
9 10 11 12 13 14 15 16
LTC3727LXEUH-1
UH PART
MARKING
727LX1
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD (PIN 33) IS SGND
(MUST BE SOLDERED TO PCB)
Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 15V, V_{RUN/SS1, 2} = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Main Control Loops
V_{OSENSE1, 2}
I_{VOSENSE1, 2}
V_REFLNREG
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
(Note 4); I_{TH1, 2} Voltage = 1.2V
(Note 4)
V_IN = 3.6V to 30V (Note 4)
● 0.788 0.800 0.812
V
–5
– 50
nA
0.002 0.02
%/V
2
3727lx1fa