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

LTC3708
TYPICAL APPLICATION
Area = 650mm², Height = 3mm
V_OUT1
2.5V
5A
C16
100μF
6.3V
V_IN
7V TO 24V
5V
BAT54A
+ C1
150μF
4V
20k
10k
SGND
RUN/SS
BOOST1
C9
10μF
25V
Q1A
Si4816BDY
L1
1.8μH
Q1B
Si4816BDY
220pF
31.6k
1M
100k ^VIN
V_CC
10k
20k
220pF
2.2μF
5V
BOOST2
6.3V
10Ω
V_CC
1μF
V_CC TRACK1 FCB DRV_CC
TG1
TG2
BOOST1
BOOST2
0.1μF
LTC3708EUH
SW1
SW2
SENSE1⁺
SENSE2⁺
BG1
SENSE1^–
BG2
SENSE2^–
PGND1
V_RNG1
PGND2
V_RNG2
1000pF
I_ON1
V_FB1
TRACK2
EXTLPF
I_ON2
V_FB2
PGOOD
INTLPF
150pF
I_TH1
I_TH2
RUN/SS SGND SGND
560pF
20k
0.1μF
V_IN
BAT54W
1μF
1μF
BOOST2
0.1μF
C11
10μF
25V
Q2A
Si4816BDY
L2
1.8μH
Q2B
Si4816BDY
C13 +
150μF
4V
V_OUT2
1.8V
5A
C15
100μF
6.3V
1000pF
750k
V_IN
V_CC
100k
20k
220pF ^5V
100k
PGOOD
150pF
560pF
15k
5.11k
20k
10k
470pF
220pF
22nF
3708 TA06
C1, C13: SANYO 4TPE150MAZB
C9, C11: TAIYO YUDEN TMK325BJ106KM
C15, C16: TDK C3225X5R0J107M
L1, L2: TOKO FDV0630-1R8M
RELATED PARTS
PART NUMBER DESCRIPTION
LTC1778
LTC3709
LTC3728
Wide Operating Range, No R_SENSE Step-Down Controller
2-Phase, No R_SENSE Step-Down Controller with Tracking/Sequencing
Dual, 550kHz, 2-Phase Synchronous Step-Down Switching Regulator
LTC3729
550kHz, PolyPhase^®, High Efficiency, Synchronous Step-Down
Switching Regulator
LTC3731
3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller
LTC3778
Wide Operating Range, No R_SENSE Step-Down Controller
PolyPhase is a registered trademark of Linear Technology Corporation
COMMENTS
Single Channel, GN16 Package
Single Output, Remote Sensing
Fixed Frequency, Dual Output
Fixed Frequency, Single Output, Up to 12-Phase Operation
3-Phase, Single Output
Single Channel, Separate V_ON Programming
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3708fb
LT 1207 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2006