LTC3892_15 Datasheet, PDF (36/36 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

LTC3892/LTC3892-1
Typical Application
C_OUT1A
150µF
VIN
16V TO 60V
C_INA
100µF
R_SNS1
3mΩ
C_INB
2.2µF
x5 _MTOP1
x2
L1
10µH
C_B1
0.1µF
RUN1 VIN RUN2
TG1
BOOST1
TG2
BOOST2
SW1
SW2
C_OUT1B
10µF
R_A1
100k
R_B1
7.15k
MBOT1
x2
C_SNS1
1nF
BG1
BG2
LTC3892-1
SENSE1+
SENSE2+
SENSE1–
V_FB1
ITH1
TRACK/SS1
SENSE2–
V_FB2
ITH2
TRACK/SS2
R_ITH1
9.78k
C_ITH1A
4.7nF
C_ITH1B
47pF
C_SS1
0.1µF
DRVSET
EXTV_CC
FREQ
PLLIN/MODE
C_B2
0.1µF
MTOP2
x2
L2
10µH
R_SNS2
3mΩ
MBOT2
x2
C_SNS2
1nF
VOUT
C_ITH2A
47pF
C_OUT2B
10µF
VOUT
12V
30A
C_OUT2A
150µF
DRVUV
INTV_CC GND
C_INTVCC
0.1µF
DRV_CC
C_DRVCC
4.7µF
R_FREQ
29.4k
TOP1, TOP2: BSC123N08NS3G
BOT1, BOT2: BSC047N08NS3G
L1, L2: COILCRAFT SER2918H-103KL
3892 TA04
Figure 14. High Current Dual-Phase Single Output Step-Down 12V Converter
Related Parts
PART NUMBER
DESCRIPTION
COMMENTS
LTC3890/LTC3890-1 60V, Low I_Q, Dual 2-Phase Synchronous Step-Down
LTC3890-2/LTC3890-3 DC/DC Controller with 99% Duty Cycle
PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V,
0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA
LTC3891
60V, Low I_Q, Synchronous Step-Down DC/DC Controller PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V,
with 99% Duty Cycle
0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA
LTC3864
60V, Low I_Q, High Voltage DC/DC Controller
with 100% Duty Cycle
Fixed Frequency 50kHz to 850kHz, 3.5V ≤ V_IN ≤ 60V,
0.8V ≤ V_OUT ≤ V_IN, I_Q = 40μA, MSOP-12E, 3mm × 4mm DFN-12
LTC3899
60V, Triple Output, Buck/Buck/Boost Synchronous
Controller with 29µA Burst Mode I_Q
4.5V (Down to 2.2V after Start-Up) ≤ V_IN ≤ 60V, V_OUT Up to 60V,
Buck V_OUT Range: 0.8V to 60V, Boost V_OUT Up to 60V
LTC3859AL
38V, Low I_Q, Triple Output, Buck/Buck/Boost Synchronous 4.5V (Down to 2.5V after Start-Up) ≤ V_IN ≤ 38V, V_OUT Up to 60V,
Controller with 28µA Burst Mode I_Q
Buck V_OUT Range: 0.8V to 24V, Boost V_OUT Up to 60V,
LTC3857/LTC3857-1 38V, Low I_Q, Dual Output 2-Phase Synchronous
LTC3858/LTC3858-1 Step-Down DC/DC Controller with 99% Duty Cycle
PLL Fixed Operating Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 38V,
0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA/170μA
LTC3807
38V, Low I_Q, Synchronous Step-Down Controller with
24V Output Voltage Capability
PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 38V,
0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA
36 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC3892}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC3892
38921f
LT 0315 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2015