LTC1702 Linear Technology, LTC1702 Datasheet - Page 36

• Manufacturer Part Number: LTC1702
• Description: Dual 550kHz Synchronous 2-Phase Switching Regulator Controller
• Manufacturer: Linear Technology

LTC1702
TYPICAL
RELATED PARTS
PART NUMBER
LTC1530
LTC1625
LTC1628
LTC1703
LTC1706-81
LTC1709
LTC1736
LTC1753
LTC1873
LTC1929
No R
36
STBY/ON
10%
V
SENSE
5V
IN
is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
C
C
C
L1: 1 H SUMIDA CEP125-1R0MC-H
L2: 2.2 H COILTRONICS UP2B-2R2
IN
OUT1
OUT2
= SANYO 10MV1200GX (6 IN PARALLEL)
0.1%
1k
1k
10k
APPLICATION
DESCRIPTION
High Power Synchronous Step-Down Controller
No R
Dual High Efficiency 2-Phase Synchronous Step-Down Controller
Dual 550kHz Synchronous 2-Phase Switching Regulator Controller LTC1702 with 5-Bit Mobile VID for Mobile Pentium
with Mobile VID
VID Voltage Programmer
2-Phase, 5-Bit Desktop VID Synchronous Step-Down Controller
Synchronous Step-Down Controller with 5-Bit Mobile VID Control
5-Bit Desktop VID Programmable Synchronous
Switching Regulator
Dual Synchronous Switching Regulator with 5-Bit Desktop VID
2-Phase, Synchronous High Efficiency Converter
= SANYO 6MV1500GX (8 IN PARALLEL)
= SANYO 6MV1500GX (3 IN PARALLEL)
20k
1%
SENSE
QSS1
TM
68k
16k
1%
Current Mode Synchronous Step-Down Controller
56k
4.75k
0.1%
330pF
QSS2
220pF
+
U
10 F
0.1 F
56pF
39pF
Low Cost Dual Supply with 2.5V Keepalive
FB2
COMP2
RUN/SS2
RUN/SS1
FB1
COMP1
FCB
SGND
V
CC
10
QSS1, QSS2: MOTOROLA MMBT3904LT1
QT1A, QT1B, QB1A, QB1B: FAIRCHILD FDS6670A
QT2, QB2: 1/2 SILICONIX Si4966
LTC1702
BOOST2
BOOST1
PGND
PV
FAULT
I
I
MAX2
MAX1
CC
SW2
SW1
TG2
BG2
TG1
BG1
+
47k
33k
C
IN
COMMENTS
SO-8 with Current Limit. No R
Above 95% Efficiency, Needs No R
Fits SO-8 Footprint
Constant Frequency, Standby 5V and 3.3V LDOs, 3.5V V
Systems
Adds 5-Bit Mobile VID to 0.8V Referenced Switching
Regulators
Current Mode, V
Fault Protection, PowerGood, 3.5V to 36V Input, Current Mode
1.3V to 3.5V Programmable Output Using Internal 5-Bit DAC
1.3V to 3.5V Programmable Core Output Plus I/O Output
Current Mode Ensures Accurate Current Sensing,
V
IN
QT2
QB2
Up to 36V, I
MBR0530T
QT1B
QB1B
1 F
OUT
IN
QT1A
QB1A
to 36V, I
Up to 40A
1 F
MBR0530T
1 F
OUT
IN
GND
L2
L1
LT1761
SENSE
LINEAR TECHNOLOGY CORPORATION 1999
Up to 42A
OUT
ADJ
SENSE
1702f LT/TP 0100 4K • PRINTED IN USA
Required
, 16-Lead SSOP Package
1702 TA04
16.2k
0.1%
16.9k
0.1%
+
+
C
®
C
OUT1
OUT2
Processor
V
2.5V/7A
2.45V/100mA
STANDBY
V
1.8V
20A
OUT2
OUT1
IN
36V