LTC3728LCGN(RevA) Ver la hoja de datos (PDF) - Linear Technology
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LTC3728LCGN Datasheet PDF : 32 Pages
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LTC3728L/LTC3728LX
ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage (VIN)........................ 30V to – 0.3V
Top Side Driver Voltages
(BOOST1, BOOST2) .................................. 36V to – 0.3V
Switch Voltage (SW1, SW2) ........................ 30V to – 5V
INTVCC, EXTVCC, RUN/SS1, RUN/SS2, (BOOST1-SW1),
(BOOST2-SW2), PGOOD ............................ 7V to – 0.3V
SENSE1+, SENSE2 +, SENSE1–,
SENSE2 – Voltages ....................... (1.1)INTVCC to – 0.3V
PLLIN, PLLFLTR, FCB, Voltage ........... INTVCC to – 0.3V
ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ... 2.7V to – 0.3V
Peak Output Current <10µs (TG1, TG2, BG1, BG2) .. 3A
INTVCC Peak Output Current ................................ 40mA
Operating Temperature Range (Note 7)
LTC3728LC/LTC3728LXC ....................... 0°C to 85°C
LTC3728LE ........................................ – 40°C to 85°C
Junction Temperature (Note 2) ............................ 125°C
Storage Temperature Range ................ – 65°C to 125°C
Reflow Peak Body Temperature (UH Package) .... 260°C
Lead Temperature (Soldering, 10 sec)
(GN Package) ................................................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
RUN/SS1 1
SENSE1+ 2
SENSE– 3
VOSENSE1 4
PLLFLTR 5
PLLIN 6
FCB 7
ITH1 8
SGND 9
3.3VOUT 10
ITH2 11
VOSENSE2 12
SENSE2– 13
SENSE2+ 14
TOP VIEW
28 PGOOD
27 TG1
26 SW1
25 BOOST1
24 VIN
23 BG1
22 EXTVCC
21 INTVCC
20 PGND
19 BG2
18 BOOST2
17 SW2
16 TG2
15 RUN/SS2
GN PACKAGE
28-LEAD NARROW PLASTIC SSOP
TJMAX = 125°C, θJA = 95°C/W
ORDER PART
NUMBER
LTC3728LCGN
LTC3728LEGN
TOP VIEW
32 31 30 29 28 27 26 25
VOSENSE1 1
PLLFLTR 2
PLLIN 3
24 BOOST1
23 VIN
22 BG1
FCB 4
ITH1 5
SGND 6
21 EXTVCC
33
20 INTVCC
19 PGND
3.3VOUT 7
ITH2 8
18 BG2
17 BOOST2
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 PCB
ORDER PART
NUMBER
LTC3728LCUH
LTC3728LEUH
LTC3728LXCUH
UH PART
MARKING
3728L
3728LE
3728LX
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Main Control Loops
VOSENSE1, 2
IVOSENSE1, 2
VREFLNREG
VLOADREG
gm1, 2
Regulated Feedback Voltage
Feedback Current
(Note 3); ITH1, 2 Voltage = 1.2V (LTC3728LC)
q
(Note 3); ITH1, 2 Voltage = 1.2V (LTC3728LE/LTC3728LX) q
(Note 3)
Reference Voltage Line Regulation VIN = 3.6V to 30V (Note 3)
Output Voltage Load Regulation (Note 3)
Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V q
Measured in Servo Loop; ∆ITH Voltage = 1.2V to 2.0V q
Transconductance Amplifier gm ITH1, 2 = 1.2V; Sink/Source 5uA; (Note 3)
0.792
0.788
0.800
0.800
–5
0.002
0.1
– 0.1
1.3
0.808
0.812
– 50
0.02
0.5
– 0.5
V
V
nA
%/V
%
%
mmho
3728lxfa
2
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