LTC3708_15 Datasheet, PDF (2/32 Pages) Linear Technology – Fast 2-Phase, No RSENSE Buck Controller with Output Tracking

LTC3708
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V_CC, DRV_CC)............. 7V to –0.3V
Boosted Topside Driver Supply Voltage
BOOST1, 2 ............................................ 42V to –0.3V
Switch Voltage (SW1, 2) .............................. 36V to –5V
SENSE1⁺, SENSE2⁺ Voltages ....................... 36V to –5V
SENSE1^–, SENSE2^– Voltages .................... 10V to –0.3V
I_ON1, I_ON2 Voltages.................................... 21V to –0.3V
(BOOST – SW) Voltages .............................. 7V to –0.3V
RUN/SS, PGOOD Voltages .......................... 7V to –0.3V
PGOOD DC Current ................................................. 5mA
TRACK1, TRACK2 Voltages..............V_CC + 0.3V to –0.3V
V_RNG1, V_RNG2 Voltages.................... V_CC + 0.3V to –0.3V
I_TH1, I_TH2 Voltages.................................... 2.7V to –0.3V
V_FB1, V_FB2 Voltages .................................. 2.7V to –0.3V
INTLPF, EXTLPF Voltages ......................... 2.7V to –0.3V
FCB Voltages ............................................... 7V to –0.3V
Operating Temperature Range (Note 5).... –40°C to 85°C
Junction Temperature (Note 2) ........................... 125°C
Storage Temperature Range................... –65°C to 125°C
Reflow Peak Body Temperature ........................... 260°C
PIN CONFIGURATION
TOP VIEW
32 31 30 29 28 27 26 25
RUN/SS 1
24 SENSE1^–
I_TH1 2
V_FB1 3
TRACK1 4
SGND 5
23 PGND1
22 BG1
21 DRV_CC
33
20 BG2
TRACK2 6
V_FB2 7
I_TH2 8
19 PGND2
18 SENSE2^–
17 V_CC
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 (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3708EUH#PBF
LTC3708EUH#TRPBF 3708
32-Lead (5mm × 5mm) Plastic QFN
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3708EUH
LTC3708EUH#TR
3708
32-Lead (5mm × 5mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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 85°C
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 5V, DRV_CC = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Main Control Loop
I_Q
Input DC Supply Current
Normal
Shutdown
2.4
3
mA
250
400
μA
I_FB1,2
V_REF
Feedback Pin Input Current
Internal Reference Voltage
V_FB1,2
Feedback Voltage
ΔV_{FB(LINEREG)1,2} Feedback Voltage Line Regulation
I_TH = 1.2V (Notes 3, 4)
I_TH = 1.2V, 0°C to 85°C (Notes 3, 4)
I_TH = 1.2V (Notes 3, 4)
I_TH = 1.2V (Note 3)
V_CC = 4.5V to 6.5V (Note 3)
0.594
l 0.591
0.594
–50
0.600
0.600
0.600
0.02
–100
0.606
0.609
0.606
nA
V
V
V
%/V
3708fb
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