Datasheet
LTC3810
38
3810fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
LT 0111 REV C • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
LTC3891 60V, Low I
Q
, Synchronous Step-Down DC/DC Controller PLL Fixed Frequency 50kHz to 900kHz
4V ≤ V
IN
≤ 60V, 0.8 ≤ V
OUT
≤ 24V, TSSOP-20E, 3mm × 4mm QFN-20
LTC3890 60V, Low I
Q
, Dual Output 2-Phase Synchronous
Step-Down DC/DC Controller
PLL Fixed Frequency 50kHz to 900kHz
4V ≤ V
IN
≤ 60V, 0.8 ≤ V
OUT
≤ 24V, 5mm × 5mm QFN-32
LTC3810-5 60V Synchronous Step-Down DC/DC Controller Constant On-Time Valley Current Mode
4V ≤ V
IN
≤ 60V, 0.8 ≤ V
OUT
≤ 0.93V
IN
, 5mm × 5mm QFN-32
LT3812-5 60V Synchronous Step-Down DC/DC Controller Constant On-Time Valley Current Mode
4V ≤ V
IN
≤ 60V, 0.8 ≤ V
OUT
≤ 0.93V
IN
, TSSOP-16E
LTC3703 100V Synchronous Step-Down DC/DC Controller PLL Fixed Frequency 100kHz to 600kHz
4V ≤ V
IN
≤ 100V, 0.8 ≤ V
OUT
≤ 0.93V
IN
, SSOP-16, SSOP-28
LT3845A 60V, Low I
Q
, Single Output Synchronous
Step-Down DC/DC Controller
Adjustable Fixed Frequency 100kHz to 500kHz
4V ≤ V
IN
≤ 60V, 1.23 ≤ V
OUT
≤ 36V, TSSOP-16E
LTC3824 60V, Low I
Q
, Step-Down DC/DC Controller, 100% Duty Cycle Selectable Fixed Frequency 200kHz to 600kHz
4V ≤ V
IN
≤ 60V, 0.8V ≤ V
OUT
≤ V
IN
, I
Q
= 40μA, MSOP-10E
15V to 100V Input Voltage to 12V/5A with Trickle Charger Start-Up
RELATED PARTS
TYPICAL APPLICATION
PGOOD
MODE/SYNC
PGOOD
V
ON
V
RNG
I
TH
SGND
U
VIN
SHDN
V
FB
SGND PGND
PGND
SS/TRACK
I
ON
PLL/LPF
C
ON
100pF
C
SS
1000pF
V
IN
15V TO 100V
V
OUT
12V
5A
C
C2
47pF
R
C
200k
R
FB2
1k
R
FB1
14k
LTC3810
EXTV
CC
TG
SW
SENSE
–
BG
BGRTN
SENSE
+
DRV
CC
INTV
CC
NDRV
BOOST
3810 TA06
C
B
0.1μF
C
DRVCC
0.1μF
C
VCC1
1μF
R
UV2
28k
R
UV1
470k
R
ON
261k
R
NDRV
100k
DB
BAS19
M1
Si7456DP
M2
Si7456DP
C
VCC2
22μF
D1
B1100
C
OUT1
270μF
16V
C
OUT2
10μF
16V
L1
10
μH
SHDN
1
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
21
20
19
18
17
16
15
C
C1
5pF
C
IN1
68μF
100V
C
IN2
1μF
100V