LTC3807_15 Datasheet, PDF (32/32 Pages) Linear Technology – Low IQ, Synchronous Step-Down Controller with 24V Output Voltage Capability

LTC3807
TYPICAL APPLICATION
V_IN
9V TO 38V
C_IN
22µF
INTV_CC
100k
350kHz
V_OUT
470pF
34.8k
0.1µF
V_IN
LTC3807
PGOOD
RUN
INTV_CC
PGND
I_LIM
EXTV_CC
PLLIN/MODE
TG
BOOST
FREQ
SW
BG
ITH
TRACK/SS
SGND
SGND
SENSE⁺
SENSE^–
V_FB
2.2µF
D1
0.1µF
MTOP
L1
8µH
MBOT
R_SENSE
10mΩ
1nF
MTOP, MBOT: Si7850DP
L1 COILCRAFT SER1360-802KL
C_OUT: SANYO 10TPE330M
D1: DFLS1100
Figure 14. High Efficiency 8.5V Step-Down Converter
+ _COUT
330µF
V_OUT
8.5V
3A
10µF
100k
10.5k
3807 F14
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC3857/LTC3857-1
LTC3858/LTC3858-1
LTC3868/LTC3868-1
LTC3834/LTC3834-1
LTC3859AL
LTC3867
Low I_Q, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 38V,
DC/DC Controllers with 99% Duty Cycle
0.8V ≤ V_OUT ≤ 24V, I_Q = 50µA
Low I_Q, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 38V,
DC/DC Controllers with 99% Duty Cycle
0.8V ≤ V_OUT ≤ 24V, I_Q = 170µA, Short-Circuit Latchoff
Low I_Q, Dual Output 2-Phase Synchronous Step-Down Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 24V,
DC/DC Controller with 99% Duty Cycle
0.8V ≤ V_OUT ≤ 14V, I_Q = 170µA, Short-Circuit Latchoff
Low I_Q, Single Output Synchronous Step-Down DC/DC Phase-Lockable Fixed Frequency 140kHz to 650kHz, 4V ≤ V_IN ≤ 36V,
Controller with 99% Duty Cycle
0.8V ≤ V_OUT ≤ 10V, I_Q = 30µA
Low I_Q, Triple Output Buck/Buck/Boost Synchronous All Outputs Remain in Regulation Through Cold Crank, 2.5V ≤ V_IN
DC/DC Controller
≤ 38V, V_OUT(BUCKS) Up to 24V, V_OUT(BOOST) Up to 60V, I_Q = 28µA
Synchronous Step-Down DC/DC Controller with
Nonlinear Control and Remote Sense
Fast Transient Response, t_ON(MIN) = 65ns, 4V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 14V, 4mm × 4mm QFN-24
LTC3864
LTC3891
Low I_Q, High Voltage Step-Down DC/DC Controller
with 100% Duty Cycle
60V, Low I_Q, Synchronous Step-Down DC/DC
Controller
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
PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 24V,
I_Q = 50µA
LTC3890/LTC3890-1/ 60V, Low I_Q, Dual Output 2-Phase Synchronous Step- Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V,
LTC3890-2/LTC3890-3 Down DC/DC Controller
0.8V ≤ V_OUT ≤ 24V, I_Q = 50µA
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC3807}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC3807
3807f
LT 0814 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2014