LTC1709-9 Linear Technology, LTC1709-9 Datasheet - Page 28

• Manufacturer Part Number: LTC1709-9
• Description: 2-Phase/ 5-Bit VID/ Current Mode/ High Efficiency/ Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

LTC1709-8/LTC1709-9
TYPICAL APPLICATIO
RELATED PARTS
PART NUMBER
LTC1438/LTC1439
LTC1438-ADJ
LTC1538-AUX
LTC1539
LTC1436A-PLL
LTC1628/LTC1628-PG Dual High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators
LTC1629/LTC1629-PG PolyPhase High Efficiency Controllers
LTC1929
LTC1702/LTC1703
LTC1708-PG
LTC1709
LTC1735
LTC1736
Adaptive Power and Burst Mode are trademarks of Linear Technology Corporation.
28
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
INTV
47k
CC
2.7k
15k
3.3nF
1000pF
0.1 F
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 Low Noise Synchronous Step-Down Switching Regulator
2-Phase High Efficiency Controller
Dual High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators
Dual High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
with 5-Bit VID and Power Good Indication
High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
with 5-Bit VID and Fault Coupling Control
High Efficiency Synchronous Step-Down Controller
High Efficiency Synchronous Step-Down Controller with 5-Bit VID
100pF
51k
10k
Figure 12. 1.3V to 2.5V/20A CPU Power Supply with Active Voltage Positioning
1000pF
470pF
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
U
RUNN/SS
SENSE1
SENSE1
EAIN
PLLFLTR
PLLIN
NC
I
SGND
V
V
V
SENSE2
SENSE2
ATTENOUT
ATTENIN
VID0
VID1
TH
DIFFOUT
OS
OS
–
+
VID INPUTS
LTC1709-8
+
–
–
+
BOOST1
BOOST2
EXTV
PGOOD
INTV
PGND
V
SW1
SW2
VID4
VID3
VID2
TG1
BG1
BG2
TG2
BIAS
V
NC
CC
CC
IN
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
5V (OPT)
0.1 F
0.22 F
10 F
0.22 F
100k
10
PGOOD
10
0.1 F
M1
M3
47 F 35V
+
L1
C
L2
IN
0.004
M4
0.004
M2
COMMENTS
POR, External Feedback Divider
Auxiliary Regulator, 5V Standby
5V Standby, POR, Low-Battery, Aux Regulator
Adaptive Power
Constant Frequency, Standby, 5V and 3.3V LDOs
Expandable Up to 12 Phases, G-28, Up to 120A
Adjustable Output Up to 40A, G-28
500kHz, 25MHz GBW
1.3V V
Accurate Current Sharing, 3.5V V
1.3V V
Accurate Current Sharing, 3.5V V
Burst Mode
Fault Protection, 3.5V V
Output Fault Protection, Power Good, GN-24,
3.5V V
170989 F12
D1
MBRS140T3
D2
MBRS140T3
SWITCHING FREQUENCY = 200kHz
C
C
L1 TO L2: 1.5 H SUMIDA CEP125-1R5MC
M1 TO M4: FAIRCHILD FDS7760A
IN
OUT
C
OUT
: 5A RIPPLE CURRENT RATING REQUIRED
OUT
OUT
IN
: 4 180 F/4V PANASONIC SP
+
TM
36V, 0.925V V
LINEAR TECHNOLOGY CORPORATION 2000
Operation, 16-Pin Narrow SSOP,
3.5V, Current Mode Ensures
3.5V, Current Mode Ensures
170989i LT/TP 0500 4K • PRINTED IN USA
TM
Mode, 24-Pin SSOP
V
5V TO 28V
V
1.3V TO 3.5V
20A
IN
OUT
IN
OUT
36V
IN
IN
2V
36V
36V