Datasheet

LTC3866
36
3866fb
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2012
LT 1012 REV B • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LTC3833 Fast Accurate Step-Down DC/DC Controller with
Differential Output Sensing
Very Fast Transient Response, t
ON(MIN)
= 20ns, 4.5V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 5.5V, TSSOP-20E, 3mm × 4mm QFN-20
LTC3878/LTC3879 No R
SENSE
™ Constant On-Time Synchronous Step-Down
DC/DC Controllers
Very Fast Transient Response, t
ON(MIN)
= 43ns, 4V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 0.9V
IN
, SSOP-16, MSOP-16E, 3mm × 3mm QFN-16
LTC3775 High Frequency Synchronous Voltage Mode Step-Down
DC/DC Controller
Very Fast Transient Response, t
ON(MIN)
= 30ns, 4V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 0.8V
IN
, MSOP-16E, 3mm × 3mm QFN-16
LTC3854 Small Footprint 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 Controllers
PLL Fixed Frequency 250kHz to 750kHz, 4V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 5.25V, MSOP-16E, 3mm × 3mm QFN-16, SSOP-16
LTC3891 60V, Low I
Q
Synchronous Step-Down DC/DC Controller PLL Capable Fixed Frequency 50kHz to 900kHz, 4V ≤ V
IN
≤ 60V,
0.8V ≤ V
OUT
≤ 24V, I
Q
= 50µA
LTC3856 2-Phase, Single Output Synchronous Step-
Down DC/DC
Controller with Diff Amp and DCR Temp Compensation
PLL Fixed 250kHz to 770kHz Frequency, 4.5V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 5.25V
LTC3829 3-Phase, Single Output Synchronous Step-Down DC/DC
Controller with Diff Amp and DCR Temp Compensation
PLL Fixed 250kHz to 770kHz Frequency, 4.5V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 5.25V
LTC3855 2-Phase, Dual Output Synchronous Step-Down DC/DC
Controller with Differential
Remote Sense
PLL Fixed Frequency 250kHz to 770kHz, 4.5V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 12.5V
LTC3860 Dual, Multiphase, Synchronous Step-Down DC/DC
Controller with Diff Amp and Three-State Output Drive
Operates with Power Blocks, DRMOS Devices or External Drivers/
MOSFETs, 3V ≤ V
IN
≤ 24V, t
ON(MIN)
= 20ns
LTC3869/LTC3869-2 2-Phase, Dual Output Synchronous Step-Down DC/DC
Controllers, with Accurate Multiphase Current Matching
PLL
Fixed Frequency 250kHz to 780kHz, 4V ≤ V
IN
≤ 30V,
0.6V ≤ V
OUT
≤ 12.5V, 4mm × 5mm QFN-28, SSOP-28
LTC3867 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
High Efficiency Step-Down Converter with Power Block
CMDSH-3
100k
1µF
100k
10k
20k
30.1k
4.75k
INTV
CC
0.1µF
0.1µF
1500pF
220pF
47nF
47nF
25 7 8 9 10 11
24 23 22 21 20 19
INTV
CC
4.7µF
V
IN
V
IN
V
OUT
INTV
CC
2.2Ω
ACBEL POWER BLOCK
VRA001-4C1G
18
17
16
15
14
13
1
2
3
4
5
6
12
ITH
V
FB
DIFFOUT
DIFFN
DIFFP
SNSD
+
EXTV
CC
V
IN
INTV
CC
BOOST
TG
SW
BG
V
IN1
V
IN2
PWMH
PWML
V
GATE
GND
GND
GND
GND
V
OUT1
V
OUT2
1
7
5
4
3
2
6
9
13
11
12
15
14
10
8
TEMP
+
TEMP
–
CS
–
CS
+
TK/SS
RUN
FREQ
MODE/PLLIN
PGOOD
ITEMP
SNS– SNSA+ ILIM CLKOUT PGND
SGND
LTC3866EUF
100µF
330µF 330µF
470µF
10µF
+ +
V
OUT
1.5V
40A
GND
3866 TA03
10Ω
10Ω