Datasheet
LTC3823
26
3823fd
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
LT 1209 REV D • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
C
P
1000pF
V
OUTSENSE
–
V
RNG
V
FB
I
TH
SGND
I
ON
V
DIFFOUT
NC
V
OUTSENSE
+
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
SENSE
+
SENSE
–
PGND
BG
DRV
CC
INTV
CC
Z2
Z1/SS
ENABLE
NC TRACK/SS PLLFLTR PLLIN V
IN
V
INSNS
ZV
CC
PGOOD V
ON
32
R
ON
90k
1%
R
C
1.5k
1%
R4
5.11k
1%
R5
10.2k
1%
R
BOOST
0Ω
R
RUN
100k
R1
23.2k
1%
R
PG
100k
R2
27.1k
1%
C6
220pF
C
C2
100pF
C
PL
0.01μF
C
SS
0.1μF
R
VIN
10Ω
CV
IN
0.1μF
C
VCC
10μF
6.3V
C9
47μF
6.3V
s3
Q2
Si4874
Q1
Si4884
R6
11k
R3
39k
E4
PGOOD
E1
INTV
CC
INTV
CC
V
IN
E2
RUN
E10
TRACK/SS
E12
GND
300kHz
E13
GND
E11
PLLIN
C
C1
6800pF
31 30 29 28 27 26
DB
CMDSH-3-LTC
C5
0.22μF
91011 1213141516
RUN FCB
LTC3823UH
Z0 BOOST TG SW
R
PL
10k
D1
B320A
L1
1μH
IHLP-2525CZ-01
C7
180μF
+
R7
100Ω
1%
C2
10μF
16V
s3
R8
100Ω
1%
E9
V
OUTSENSE
–
E6
V
OUTSENSE
+
E8
GND
E5
GND
E7
V
OUT
1.8V/10A
E3
V
IN
4.5V TO 16V
E14
V
OUT
E15
GND
3823 TA03
Design Example: 1.8V/10A with Synchronization
PART NUMBER DESCRIPTION COMMENTS
LTC3854 Small Footprint Wide V
IN
Range Synchronous Step-Down
DC/DC Controller
Fixed 400kHz Operating Frequency, 4.5V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 5.25V, 2mm × 3mm QFN-12
LTC3851A/
LTC3851A-1
No R
SENSE
Wide V
IN
Range Synchronous Step-Down DC/DC
Controller
Phase-Lockable Fixed Operating Frequency 250kHz to 750kHz,
4V ≤ V
IN
≤ 38V, 0.8V ≤ V
OUT
≤ 5.25V, MSOP-16E, 3mm × 3mm
QFN-16, SSOP-16
LTC3878 No R
SENSE
Constant On-Time Synchronous Step-Down DC/DC
Controller
Very Fast Transient Response, t
ON(MIN)
= 43ns, 4V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 0.9V
IN
, SSOP-16
LTC3879 No R
SENSE
Constant On-Time Synchronous Step-Down DC/DC
Controller
Very Fast Transient Response, t
ON(MIN)
= 43ns, 4V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 0.9V
IN
, MSOP-16E, 3mm × 3mm QFN-16
LTC3850/LTC3850-1/
LTC3850-2
Dual 2-Phase, High Effi ciency Synchronous Step-Down DC/DC
Controllers, R
SENSE
or DCR Current Sensing and Tracking
Phase-Lockable Fixed Operating Frequency 250kHz to 780kHz,
4V ≤ V
IN
≤ 30V, 0.8V ≤ V
OUT
≤ 5.25V
LTC3855 Dual, Multiphase Synchronous Step-Down DC/DC with
Differential Remote Sense
Phase-Lockable Fixed Operating Frequency 250kHz to 770kHz,
4.5V ≤ V
IN
≤ 38V, 0.8V ≤ V
OUT
≤ 12.5V
LTM4600HV 10A DC/DC μModule
®
Complete Power Supply High Effi ciency, Compact Size, Ultrafast Transient Response,
4.5V ≤ V
IN
≤ 28V, 0.8V ≤ V
OUT
≤ 5V, 15mm × 15mm × 2.8mm
LTM4601AHV 12A DC/DC μModule Complete Power Supply High Effi ciency, Compact Size, Ultrafast Transient Response,
4.5V ≤ V
IN
≤ 28V, 0.8V ≤ V
OUT
≤ 5V, 15mm × 15mm × 2.8mm
LTC3610 12A, 1MHz, Monolithic Synchronous Step-Down DC/DC
Converter
High Effi ciency, Adjustable Constant On-Time, 4V ≤ V
IN
≤ 24V,
V
OUT(MIN)
0.6V, 9mm × 9mm QFN-64
LTC3611 10A, 1MHz, Monolithic Synchronous Step-Down DC/DC
Converter
High Effi ciency, Adjustable Constant On-Time, 4V ≤ V
IN
≤ 32V,
V
OUT(MIN)
0.6V, 9mm × 9mm QFN-64
μModule is a registered trademark of Linear Technology Corporation.