LTC1929 LINER [Linear Technology], LTC1929 Datasheet - Page 24

• Manufacturer Part Number: LTC1929
• Description: 2-Phase, High Efficiency, Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

LTC1929
TYPICAL APPLICATIO
RELATED PARTS
PART NUMBER
LTC1438/LTC1439
LTC1438-ADJ
LTC1538-AUX
LTC1539
LTC1435/LTC1435A
LTC1436A-PLL
LTC1628
LTC1629
LTC1702/LTC1703
LTC1735
LTC1736
Adaptive Power and Burst Mode are trademarks of Linear Technology Corporation.
24
V
V
SWITCHING FREQUENCY = 310kHz
IN
OUT
: 5V TO 28V
: 1.8V/20A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
10k
0.1 F
33pF
13.2k
DESCRIPTION
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 Efficiency Synchronous Step-Down Switching Regulator
High Efficiency Low Noise Synchronous Step-Down Switching Regulator
Dual High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
PolyPhase High Efficiency Controller
Dual High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
High Efficiency Synchronous Step-Down Controller
High Efficiency Synchronous Step-Down Controller with 5-Bit VID
100pF
220pF
16.5k
INTV
1000pF
1000pF
CC
MI – M4: FAIRCHILD FDS6680A
L1 – L2: 2 H SUMIDA CEE125-2R1NC
C
OUT
10
11
12
13
14
1
2
3
4
5
6
7
8
9
: PANASONIC EEFUEOD271R
U
RUN/SS
SENSE1
SENSE1
EAIN
PLLFLTR
PLLIN
NC
I
SGND
V
V
V
SENSE2
SENSE2
TH
DIFFOUT
OS
OS
–
+
LTC1929
+
–
–
+
Figure 13. 1.8V/20A CPU Power Supply
BOOST1
BOOST2
AMPMD
EXTV
INTV
PGND
SW1
SW2
BG1
BG2
TG1
TG2
V
NC
CC
CC
IN
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D4
0.22 F
0.22 F
1 F,25V
D3
D3, D4: CENTRAL CMDSH-3TR
4.7 F
6.3V
0.1 F
10
M1
M3
COMMENTS
POR, External Feedback Divider
Auxiliary Regulator, 5V Standby
5V Standby, POR, Low-Battery, Aux Regulator
Burst Mode
Adaptive Power
Constant Frequency, Standby, 5V and 3.3V LDOs
Expandable Up to 12 Phases, G-28, Up to 120A
500kHz, 25MHz GBW
Burst Mode Operation, 16-Pin Narrow SSOP,
Fault Protection, 3.5V V
Output Fault Protection, Power Good, GN-24,
3.5V V
L1
L2
22 F
50V
IN
TM
36V, 0.8V V
Operation, 16-Pin Narrow SO
LINEAR TECHNOLOGY CORPORATION 1999
TM
0.005
0.005
M2
M4
Mode, 24-Pin SSOP
1929i LT/TP 0899 4K • PRINTED IN USA
GND
IN
D1
MBRM
140T3
D2
MBRM
140T3
OUT
C
OUT
36V
6V
2X270 F
2V
1929 TA02
V
5V TO
28V
V
1.8V/20A
IN
OUT