LTC1876
36
1876fa
PART NUMBER DESCRIPTION COMMENTS
LTC1625/LTC1775 No R
SENSE
TM
Current Mode Synchronous Step-Down Controllers Burst Mode Operation, GN-16
LTC1628/LTC1628-PG High Efficiency, Dual, 2 Phase Synchronous Step-Down Controllers Constant Frequency, Standby, 5V and 3.3V LDO
LTC1708-PG Dual, 2 Phase Synchronous Controller with Mobile VID Control 36V Input; V
OUT1
for CPU Core Voltage;
V
OUT2
for Memory, Chipset I/O
LTC1709 2 Phase, 5-Bit Adustable, High Efficiency, Synchronous Step-Down Controller Constant Frequency, VID, up to 42A
LTC1735 High Efficiency Synchronous Step-Down Switching Regulator Output Fault Protection, GN-16
LTC1736 High Efficiency Synchronous Controller with Mobile VID Control Output Fault Protection, G-24
LTC1772 SOT-23 Step-Down Controller 2.5V ≤ V
IN
≤ 9.8V; I
OUT
Up to 4.5A; 550kHz
Operation for Smallest PCB Area
LTC1778 No R
SENSE
Wide Input Range Synchronous Step-Down Controller Up to 97% Efficiency; 4V␣ ≤ V
IN
≤ 36V
0.8V ≤ V
OUT
≤ (0.9)(V
IN
); Input up to 20A
LTC3713 Low Input Voltage Synchronous Step-Down Controller 1.5V ≤ V
IN
, No R
SENSE
, Standard 5V-Logic Level
MOSFETs
LTC3714 No R
SENSE
DC/DC Controller for Mobile Pentium Processors Supports up to 25A; Sense Resistor Optional
LTC3716 2-Phase DC/DC Controller for Mobile Pentium Processors Small, Low Profile Design; Supports up to 30A
LTC3728 Dual, 2-Phase 550kHz Synchronous Step-Down Controller Phase-Lockable from 250kHz to 550kHz,
5mm × 5mm QFN and SSOP-28, 3.5V ≤ V
IN
≤ 36V
Adaptive Power and No R
SENSE
are trademarks of Linear Technology Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2000
LT/TP 1002 1K REV A • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
U
High Efficiency Triple 5V/ 3.3V/12V Power Supply
4.7µF
10V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
+
33µF
35V
10µF
35V
D1
M1 M2
M3
M4
D2
+
3.3V
RUN/SS1
SENSE1
+
SENSE1
–
V
OSENSE1
FREQSET
STBYMD
FCB
I
TH1
SGND
3.3V
OUT
I
TH2
V
OSENSE2
SENSE2
–
SENSE2
+
AUXSGND
AUXV
FB
AUXSW
AUXSW
PGOOD
TG1
SW1
BOOST1
V
IN
BG1
EXTV
CC
INTV
CC
PGND
BG2
BOOST2
SW2
TG2
RUN/SS2
AUXSD
AUXV
IN
AUXPGND
AUXPGND
LTC1876
L1
4.6µH
L2
4.6µH
47µF
6.3V
SP
56µF
4V
SP
V
OUT1
3.3V
5A
V
OUT2
5V
5A
1876 TA03
+ +
R
SENSE
0.008Ω
R
SENSE
0.008Ω
SHUTDOWN
V
OUT3
12V
200mA
10µF
20V
D5
L3, 10µH
0.1µF
0.1µF
1µF
0.1µF
0.01µF
0.01µF
0.1µF
0.1µF
V
PULL-UP
(<7V)
100k
D3
D4
10Ω
+
86.6k
10.2k
20k
1%
20k
1%
63.4k
1%
105k
1%
6.8k
6.8k
1000pF
1000pF
470pF
220pF
220pF
470pF
M1, M2, M3, M4: FDS6912A
L1, L2: SUMIDA CEP123-4R6
L3: TOKO A920CY-100M
D1, D2: MBRM140T3
D3, D4: BAT54A
D5: CMDSH-3
INTV
CC
V
IN
5.2V TO 28V
43
21
43
21
