LTC1709EG-85#TR Linear Technology, LTC1709EG-85#TR Datasheet - Page 28

• Manufacturer Part Number: LTC1709EG-85#TR
• Description: IC SW REG SYNC STEP-DWN 36-SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1709EG-85#TR

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.3 ~ 3.5 V
• Current - Output: 3A
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -
• Other names: LTC1709EG-85TR; LTC1709EG85TR

LTC1709-85
TYPICAL APPLICATIO
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PART NUMBER
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LTC1736
LTC1778
LTC3729
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Adaptive Power and No R
28
Figure 10. 5V to 15V Input, 1.05V to 1.825V/30A Pentium
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
INTV
6.98k
DESCRIPTION
Dual High Efficiency Low Noise Synchronous Step-Down Switching Regulators POR, Auxiliary Regulator
Dual High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
Dual High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
with 5-Bit VID and Power Good Indication
High Efficiency Synchronous Step-Down Controller
High Efficiency Synchronous Step-Down Controller with 5-Bit VID
No R
550kHz PolyPhase Step-Down Synchronous Controller
3-Phase, 5-Bit Intel Mobile VID Synchronous Step-Down Controller
3-Phase Step-Down Synchronous Controller (VRM 9.0/9.1)
6.81k
SENSE
CC
0.1 F
2.7k
470pF
1000pF
SENSE
10
FAX: [phone] www.linear.com
are trademarks of Linear Technology Corporation.
10
100pF
26.8k
TM
10k
1000pF
INTV
10
470pF
Step-Down Synchronous Controller
10
CC
U
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
RUN/SS
SENSE1
SENSE1
EAIN
PLLFLTR
PLLIN
FCB
I
SGND
V
V
V
SENSE2
SENSE2
ATTENOUT
ATTENIN
VID25mV
VID0
TH
DIFFOUT
OS
OS
LTC1709-85
–
+
VID INPUTS
+
–
–
+
BOOST1
BOOST2
EXTV
PGOOD
INTV
PGND
V
VID3
VID2
VID1
SW1
SW2
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
III Processor Power Supply with Active Voltage Positioning
PGOOD
10
0.1 F
M1
M3
+
L1
C
L2
IN
M2
M4
0.002
0.002
COMMENTS
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
VID Tables; Mobile, VRM 8.4 and VRM 9.0
Burst Mode Operation, 16-Pin Narrow SSOP,
Fault Protection, 3.5V V
Output Fault Protection, Power Good, GN-24,
3.5V V
4V V
550kHz per Phase, Up to 12-Phase Operation,
I
600kHz per Phase, 0.6V V
IMVP-3, Integrated MOSFET Drivers
600kHz per Phase, 5-Bit VID, 5% Accurate
Current Sharing, I
D1
MBRS140T3
D2
MBRS140T3
OUT
C
170985 F11
SWITCHING FREQUENCY = 200kHz
C
C
L1 TO L2: SUMIDA CEP125-1R0MC-H 1 H
M1, M3: IRF7811W OR Si7860DP
M2, M4: IRF7811W 2 OR Si7856DP
PENTIUM IS A REGISTERED TRADEMARK OF
INTEL CORPORATION
OUT
IN
OUT
+
: 5A RIPPLE CURRENT RATING REQUIRED
= 20A per Phase
: 5 270 F/2V PANASONIC SP
IN
OUT
IN
36V, 0.8V V
36V, 0.925V V
LINEAR TECHNOLOGY CORPORATION 2001
3.5V, Current Mode Ensures
V
5V TO 15V
V
1.05V TO 1.825V
30A MAX
IN
OUT
OUT
LT/TP 1202 2K • PRINTED IN USA
60A
OUT
IN
OUT
OUT
36V
V
IN
1.75V,
, SSOP-16
IN
2V
36V
170985f