LTC1628 LINER [Linear Technology], LTC1628 Datasheet - Page 32

• Manufacturer Part Number: LTC1628
• Description: High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators
• Manufacturer: LINER [Linear Technology]

LTC1628/LTC1628-PG
RELATED PARTS
PART NUMBER
LTC1159
LTC1438/LTC1439
LTC1438-ADJ
LTC1538-AUX
LTC1539
LTC1530
LTC1625/LTC1775
LTC1629
LTC1702
LTC1703
LT1709
LTC1735
LTC1736
LTC1929
Adaptive Power, No R
32
TYPICAL APPLICATIO
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
V
V
IN
OUT
SENSE
0.1 F
27pF
27pF
: 5.2V TO 28V
33pF
33pF
20k
15k
15k
20k
DESCRIPTION
High Efficiency Synchronous Step-Down Switching Regulator
Dual High Efficiency Low Noise Synchronous Step-Down Switching Regulators POR, Auxiliary Regulator
Dual Synchronous Controller with Auxiliary Regulator
Dual High Efficiency Low Noise Synchronous Step-Down Switching Regulator
Dual High Efficiency Low Noise Synchronous Step-Down Switching Regulator
High Power Step-Down Synchronous DC/DC Controller in SO-8
No R
20A to 200A PolyPhase
No R
No R
with 5-Bit Mobile VID Control
High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
with 5-Bit VID
High Efficiency Synchronous Step-Down Switching Regulator
High Efficiency Synchronous Controller with 5-Bit Mobile VID Control
2-Phase Synchronous Controller
1%
1%
: 5V, 4A/3.3V, 4A
0.1 F
and PolyPhase are trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.
SENSE
SENSE
SENSE
0.01 F
63.4k
105k
1%
1%
TM
220pF
220pF
2-Phase Dual Synchronous Step-Down Controller
2-Phase Dual Synchronous Step-Down Controller
Current Mode Synchronous Step-Down Controller
INTV
1000pF
1000pF
3.3V
CC
SWITCHING FREQUENCY = 300kHz
MI, M2: FDS8936A
U
TM
10
11
12
13
14
Synchronous Controller
1
2
3
4
5
6
7
8
9
Figure 13. LTC1628 5V/4A, 3.3V/4A Regulator
RUN/SS1
SENSE1
SENSE1
V
FREQSET
STBYMD
FCB
I
SGND
3.3V
I
V
SENSE2
SENSE2
TH1
TH2
OSENSE1
OSENSE2
OUT
+
–
LTC1628
–
+
RUN/SS2
(PGOOD)
FLTCPL*
BOOST1
BOOST2
EXTV
INTV
PGND
SW1
SW2
TG1
BG1
BG2
TG2
V
CC
CC
IN
FLTCPL
L1, L2: 8 H SUMIDA CEP1238R0MC
OUTPUT CAPACITORS: PANASONIC SP SERIES
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1 F
10V
PGOOD
CMDSH-3TR
0.1 F
V
(<7V)
CMDSH-3TR
PULL-UP
0.1 F
4.7 F
0.1 F
10
M1A
M2A
COMMENTS
100% DC, Logic Level MOSFETs, V
POR, External Feedback Divider
Auxiliary Regulator, 5V Standby
5V Standby, POR, Low-Battery, Aux Regulator
High Efficiency 5V to 3.3V Conversion at Up to 15A
97% Efficiency, No Sense Resistor, 16-Pin SSOP
Expandable from 2-Phase to 12-Phase, Uses All
Surface Mount Components, No Heat Sink
550kHz, No Sense Resistor
Mobile Pentium
V
1.3V V
Accurate Current Sharing, 3.5V V
Output Fault Protection, 16-Pin SSOP
Output Fault Protection, 24-Pin SSOP,
3.5V V
Up to 42A, Uses All Surface Mount Components,
No Heat Sink, 3.5V V
M1B
M2B
IN
8 H
22 F
8 H
50V
L1
L2
*PGOOD ON THE LTC1628-PG
7V
OUT
IN
0.015
0.015
56 F, 4V
1628 F13
1628fa LT/TP 0300 2K REV A • PRINTED IN USA
47 F
6.3V
D1
MBRM
140T3
D2
MBRM
140T3
36V
3.5V, Current Mode Ensures
LINEAR TECHNOLOGY CORPORATION 1998
®
III Processors, 550kHz,
IN
V
5V
3A; 4A PEAK
GND
V
5.2V TO
28V
V
3.3V
3A; 4A PEAK
OUT1
IN
OUT2
36V
IN
IN
< 40V
36V