LTC3784_15 Datasheet, PDF (38/38 Pages) Linear Technology – 60V PolyPhase Synchronous Boost Controller

LTC3784
Typical Application
I_IN
I₁
PHASMD
0°
BG1
TG1
LTC3784
I₂
CLKOUT
180°
BG2
TG2
+90°
90,270
I₃
90°
PLLIN/MODE BG1
PHASMD
TG1
LTC3784
I₄
270°
BG2
TG2
BOOST: 24V, 5A
BOOST: 24V, 5A
BOOST: 24V, 5A
BOOST: 24V, 5A
C_IN
12V
I₁
I₂
24V, 20A
I₃
I₄
C_OUT I_COUT
I*_IN
I*_COUT
REFER TO FIGURE 15 FOR APPLICATION CIRCUITS
* RIPPLE CURRENT CANCELLATION INCREASES THE RIPPLE
FREQUENCY AND REDUCES THE RMS INPUT/OUTPUT RIPPLE
CURRENT, THUS SAVING INPUT/OUTPUT CAPACITORS
3784 F16
Figure 16. PolyPhase Application
Related Parts
PART NUMBER
DESCRIPTION
COMMENTS
LTC3788/LTC3788-1 Multiphase, Dual Output Synchronous Step-Up
Controller
4.5V (Down to 2.5V After Start-Up) ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to
900kHz Fixed Operating Frequency, 5mm × 5mm QFN-32, SSOP-28
LTC3787
2-Phase Single Output Synchronous Boost Controller 4.5V ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to 900kHz, 4mm × 5mm
QFN-28 and SSOP-28 Packages
LTC3786
Low I_Q Synchronous Step-Up Controller
4.5V (Down to 2.5V After Start-Up) ≤ V_IN ≤ 38V, V_OUT Up to 60V, 50kHz to
900kHz Fixed Operating Frequency, 3mm × 3mm QFN-32, MSOP-16E
LTC3862/LTC3862-1/ Multiphase, Dual Channel Single Output Current
LTC3862-2
Mode Step-Up DC/DC Controller
4V ≤ V_IN ≤ 36V, 5V or 10V Gate Drive, 75kHz to 500kHz Fixed Operating
Frequency, SSOP-24, TSSOP-24, 5mm × 5mm QFN-24
LT3757/LT3758
Boost, Flyback, SEPIC and Inverting Controller
2.9V ≤ V_IN ≤ 40V/100V, 100kHz to 1MHz Fixed Operating Frequency,
3mm × 3mm DFN-10 and MSOP-10E
LTC3859AL
LTC3789
Low I_Q, Triple Output Buck/Buck/Boost Synchronous
DC/DC Controller
High Efficiency Synchronous 4-Switch Buck-Boost
DC/DC Controller
All Outputs Remain in Regulation Through Cold Crank, 4.5V (Down to
2.5V After Start-Up) ≤ V_IN ≤ 38V, V_OUT(BUCKS) Up to 24V, V_OUT(BOOST)
Up to 60V, I_Q = 28µA
4V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 38V, 4mm × 5mm QFN-28 and SSOP-28
LT8705
80V V_IN and V_OUT Synchronous 4-Switch Buck-Boost V_IN Range: 2.8V (Need EXTV_CC > 6.4V) to 80V, V_OUT Range: 1.3V to 80V,
DC/DC Controller
Four Regulation Loops
LTC3890/LTC3890-1/ 60V, Low I_Q, Dual 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V,
LTC3890-2/LTC3890-3 DC/DC Controller
0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA
38 ^{Linear Technology Corporation}
1630 McCarthy Blvd., Milpitas,
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3784fb
LT 0715 REV B • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2014