LTC3812-5_15 Datasheet, PDF (34/34 Pages) Linear Technology – 60V Current Mode Synchronous Switching Regulator Controller

LTC3812-5
TYPICAL APPLICATION
15V to 60V Input Voltage to 12V/5A with Trickle Charger Start-Up
R_ON
261k
R_NDRV
250k
C_IN1
68μF
100V
V_IN
15V TO 60V
C_IN2
1μF
100V
PGOOD
C_ON
100pF
C_SS
1000pF
C_C2
47pF
R_C
C_C1
5pF
R_FB2 200k
1k
1 _ION
16
BOOST
2
3
4
5
6
LTC3812-5
V_RNG
TG
PGOOD
SW
FCB
I_TH
PGND
V_FB
15
14
13
12
BG
7
RUN/SS
INTV_CC ¹¹
8
SGND
10
EXTV_CC
9
NDRV
SGND
R_FB1
14k
D_B
BAS19
C_B
0.1μF
C_DRVCC
0.1μF
C_VCC
1μF
C5
22μF
PGND
M1
Si7850DP
L1
10μH
M2
Si7850DP
D1
B1100
PGND
C_OUT1
270μF
16V
V_OUT
12V
5A
C_OUT2
10μF
16V
38125 TA04
RELATED PARTS
PART NUMBER
LTC3891
LTC3890
LTC3810
LTC3810-5
LTC3703
LT3845A
LTC3824
DESCRIPTION
60V, Low I_Q, Synchronous Step-Down DC/DC Controller
60V, Low I_Q, Dual Output 2-Phase Synchronous
Step-Down DC/DC Controller
100V Synchronous Step-Down DC/DC Controller
60V Synchronous Step-Down DC/DC Controller
100V Synchronous Step-Down DC/DC Controller
60V, Low I_Q, Single Output Synchronous
Step-Down DC/DC Controller
60V, Low I_Q, Step-Down DC/DC Controller, 100% Duty Cycle
COMMENTS
PLL Fixed Frequency 50kHz to 900kHz
4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 24V, TSSOP-20E, 3 × 4 QFN-20
PLL Fixed Frequency 50kHz to 900kHz
4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 24V, 5 × 5 QFN-32
Constant On-time Valley Current Mode
4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 0.93V_IN, SSOP-28
Constant On-time Valley Current Mode
4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 0.93V_IN, 5 × 5 QFN-32
PLL Fixed Frequency 100kHz to 600kHz
4V ≤ V_IN ≤ 100V, 0.8V ≤ V_OUT ≤ 0.93V_IN, SSOP-16, SSOP-28
Adjustable Fixed Frequency 100kHz to 500kHz,
4V≤ V_IN ≤ 60V, 1.23V ≤ V_OUT ≤ 36V, TSSOP-16E
Selectable Fixed Frequency 200kHz to 600kHz
4V≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ V_IN, I_Q = 40μA, MSOP-10E
34 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
38125fc
LT 0111 REV C • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2007