LTC1704/LTC1704B
28
1704bfa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2001
LT/TP 0303 1K REV A • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATIO
U
PART NUMBER DESCRIPTION COMMENTS
LTC1530 High Power Synchronous Step-Down Controller SO-8 with Current Limit, No R
SENSE
TM
Required
LTC1628 Dual High Efficiency 2-Pass Synchronous Step-Down Controller Constant Frequency, Standby 5V and 3.3V LDOs,
3.5V ≤ V
IN
≤ 36V
LTC1699 SMBus VID Voltage Programmers SMBus Interface, Intel 5-Bit Mobile, Intel Desktop VID Codes
VRM8.4 and VRM9.0
LTC1703 Dual 550kHz Synchronous 2-Phase Switching Regulator VID Control with 25MHz GBW Voltage Mode, V
IN
≤ 7V
Controller with VID
LTC1705 Dual 550kHz Synchronous Switching Regulator Controller VID Control with 20MHz GBW Voltage Mode, V
IN
≤ 6V
with 5-Bit VID Plus LDO
LTC1706-81 5-Bit Desktop VID Programmer Parallel Interface, 0.8V Reference Intel Desktop VID Codes
(VRM8.4)
LTC1706-82 VID Programmer for Intel VRM9.0 Parallel Interface, 0.8V Reference Intel Desktop VID Codes
(VRM9.0)
LTC1736 Synchronous Step-Down Controller with 5-Bit VID Control Output Fault Protection, Power Good Output, 3.5V to 36V Input
LTC1778 No R
SENSE
Current Mode Synchronous Step-Down Controller Up to 97% Efficiency, 4V ≤ V
IN
≤ 36V,
0.8V ≤ V
OUT
≤ (0.9)(V
IN
), I
OUT
Up to 20A
LTC3701 2-Phase, Low V
IN
, Dual Step-Down Controller 2.5V ≤ V
IN
≤ 9.8V, 550kHz Operation, Minimum C
IN
,
16-Lead SSOP Package
No R
SENSE
is a trademark of Linear Technology Corporation.
VID Controlled Power Supply
+
BOOST
TG
SW
PGOOD
REGILM
C
CP
1µF
10Ω
R
MAX
13.7k
R4
11k
R3
1.8k
V
IN
6
5
9
10
C3
1800pF
5k
R
REGILM
470k
10µF
+
10µF
D
CP
MBR0520LT1
16
1
2
QTB
1µF
L1
0.68µH
15 11
12
10
C
SS
0.1µF
C
DELAY
1000pF
QEXT
ON SEMICONDUCTOR
D44H11
R5
1.69k
R6
806Ω
RUN/SS
4
GND
8
REGDR
7
REGFB
9
1704 TA02
PV
CC
LTC1704
V
CC
QTA
BG
14
I
MAX
3
PGND
13
COMP
5
FB
6
QBAQBB
+
C
OUTREG
100µF
TANT
V
OUTREG
2.5V
2A
3.3V
1µF
C2
330pF
C
IN
: KEMET T510X337K010AS
C
OUTSW
: PANASONIC EEFUE0G181R
L1: SUMIDA CEP125-4712-T007
QTA, QTB, QBA, QBB: FAIRCHILD FDS6670A
C1
1800pF
+
+
C
OUTSW
180µF
4V
×6
C
IN
330µF
10V
×3
V
IN
5V
V
OUTSW
1.3V TO 3.5V
15A
FB
V
CC
GND
VID4VID3VID2
SENSE
LTC1706-81
FROM µP
VID1VID0
