LTC3899_15 Datasheet, PDF (38/38 Pages) Linear Technology – 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller

LTC3899
Typical Application
MTOP1, MTOP2: BSC057N08NS3
MBOT1, MBOT2: BSC036NE7NS3
MTOP3, MBOT3: BSC042NE7NS3
L1: WÜRTH 744325240
L2: WÜRTH 744325330
L3: WÜRTH 7443551370
C_OUT1A, C_OUT2A: 6TPB220ML
C_IN1, C_OUT3A: SUNCON 63HVP33M
V_OUT1
R_A1
68.1k
R_B1
215k
C_ITH1A 100pF
C_ITH1 1500pF
R_ITH1
10k
C_SS1 0.1µF
V_OUT2
R_A2
68.1k
C_ITH2 2.2nF
R_ITH2
12.7k
C_ITH2A 100pF
R_B2
357k
C_SS2 0.1µF
LTC3899
V_FB1
TG1
C_B1 0.1µF
BOOST1
SW1
ITH1
BG1
MTOP1
L1
2.4µH
MBOT1
TRACK/SS1 SENSE1⁺
SENSE1^–
RUN1
RUN2
V_FB2
RUN3
V_BIAS
ITH2
GND
TRACK/SS2
DRV_CC
EXTV_CC
C1
1nF
C_BIAS
0.1µF
C_DRVCC
4.7µF
V_OUT3
R_A3
12.1k
C_ITH3
4.7nF
R_ITH3
4.3k
C_ITH3A 220pF
R_B3
232k
V_FB3
ITH3
C_SS3 0.1µF
SS3
TG2
C_B2 0.1µF
BOOST2
SW2
BG2
MTOP2
L2
3.3µH
MBOT2
SENSE2⁺
C2
SENSE2^–
1nF
FREQ
PLLIN/MODE
TG3
C_B3 0.1µF
DRVSET
VPRG3
BOOST3
SW3
MTOP3
L3
3.7µH
C_INTVCC
0.1µF
BG3
MBOT3
INTV_CC
SENSE^–
C3
SENSE3⁺
1nF
R_SNS1
6mΩ
C_OUT1A
220µF
V_OUT1
3.3V
C_{OUT1B 8A}
47µF
×2
R_SNS2
6mΩ
C_OUT2A
220µF
V_OUT2
5V
C_{OUT2B 8A}
47µF
×2
R_SNS3
6mΩ
C_OUT3A
33µF
C_IN1
33µF
×2
V_OUT3
24V
C_{OUT3B 5A}
2.2µF
×6
C_IN2
2.2µF
×3
V_IN
12V TO 60V
3899 TA03
*V_OUT3 IS 24V WHEN V_IN < 24V,
FOLLOWS V_IN WHEN V_IN > 24V
Figure 13. High Efficiency Triple 24V/3.3V/5V Converter with 10V Gate Drive
Related Parts
PART NUMBER
DESCRIPTION
COMMENTS
LTC3859AL
Triple Output, Buck/Buck/Boost Synchronous
Controller with 28µA Burst Mode I_Q
4.5V (Down to 2.5V After Start-Up) ≤ V_IN ≤ 38V, V_OUT Up to 60V,
I_Q = 28µA, Buck V_OUT Range: 0.8V to 24V, Boost V_OUT Up to 60V
LTC3892/LTC3892-1
LTC3769
60V, Low I_Q, Dual 2-Phase Synchronous Step-Down PLL Fixed Frequency 50kHz to 900kHz, 4.5V ≤ V_IN ≤ 60V,
DC/DC Controller with 99% Duty Cycle
0.8V ≤ V_OUT ≤ 0.99V_IN, I_Q = 29µA
Low I_Q Synchronous Step-Up DC/DC Controller
4.5V (Down to 2.5V After Start-Up) ≤ V_IN ≤ 60V, V_OUT Up to 60V, I_Q = 28µA,
PLL Fixed Frequency 50kHz to 900kHz, 4mm × 4mm QFN-24, TSSOP-20E
LTC3784
Low I_Q, Multiphase, Dual Channel Single Output
Synchronous Step-Up DC/DC Controller
4.5V (Down to 2.5V After Start-Up) ≤ V_IN ≤ 60V, V_OUT Up to 60V,
PLL Fixed Frequency 50kHz to 900kHz , I_Q = 28µA
LTC3890/LTC3890-1 60V, Low I_Q, Dual 2-Phase Synchronous Step-Down PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V,
LTC3890-2/LTC3890-3 DC/DC Controller with 99% Duty Cycle
0.8V ≤ V_OUT ≤ 24V, I_Q = 50µA
LTC3891
60V, Low I_Q, Synchronous Step-Down 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
LTC3857/LTC3857-1
LTC3858/LTC3858-1
LTC3864
LT^®8705
Low I_Q, Dual Output 2-Phase Synchronous Step-
Down DC/DC Controller with 99% Duty Cycle
60V, Low I_Q, High Voltage DC/DC Controller with
100% Duty Cycle
80V V_IN and V_OUT Synchronous 4-Switch
Buck-Boost DC/DC Controller
Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 24V, I_Q = 50µA/170µA
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
V_IN Range: 2.8V (Need EXTV_CC > 6.4V) to 80V,
V_OUT Range: 1.3V to 80V; 4 Regulation Loops
3899f
38 Linear Technology Corporation
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LT 0215 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2015