ltc3850gn-2 Linear Technology Corporation, ltc3850gn-2 Datasheet - Page 36

• Manufacturer Part Number: ltc3850gn-2
• Description: Dual, 2-phase Synchronous Step-down Switching Controller
• Manufacturer: Linear Technology Corporation

LTC3850-2
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER DESCRIPTION
LTC1625/
LTC1775
LTC1735
LTC1778
LTC3727A-1
LTC3728
LTC3729L-6
LTC3731
LTC3810
LTC3826
LTC3828
LTC3834/
LTC3834-1
LT3845
LTC3851
PolyPhase is a registered trademark of Linear Technology Corporation. No R
36
L1, L2: VISHAY IHLP4040DZ-01 0.56μH
C
FOR SINGLE OUTPUT, DUAL PHASE OPERATION, TIE THE FOLLOWING PINS TOGETHER:
V
ITH1 TO ITH2
OUT
FB1
: SANYO 2R5TPE330M9
TO V
2.2nF
FB1
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
220pF
2.55k
1nF
20k
2.74k
0.1μF
No R
Synchronous Step-Down Switching Regulator Controller
No R
Dual, 2-Phase Synchronous Controller
2-Phase 550kHz, Dual Synchronous Step-Down Controller
20A to 200A PolyPhase
3-Phase, Single Output From 250kHz to 600kHz Synchronous
Step-Down Controller
100V Current Mode Synchronous Step-Down Switching Controller 0.8V ≤ V
Low I
Dual, 2-Phase Synchronous Step-Down Controller with Tracking
Low I
Low I
DC/DC Controller
High Effi ciency Synchronous Step-Down Switching
Regulator Controller
TK/SS1 TO TK/SS2
RUN1 TO RUN2
RUN
SENSE
SENSE
Q
Q
Q
7.5k
, Dual, 2-Phase Synchronous Step-Down Controller
, Synchronous Step-Down Controller
, High Voltage Single Output Synchronous Step-Down
●
™ Current Mode Synchronous Step-Down Controllers
Wide Input Range Synchronous Step-Down Controller
FAX: [phone]
0.1μF
20k
TK/SS1
I
V
V
I
TK/SS2
SENSE2
SENSE2
SENSE1
TH1
TH2
FB1
FB2
0.1μF
–
+
20k
–
SENSE1
SGND
®
Figure 21. 1.1V/30A Dual Phase Core Converter, F
Synchronous Controller
+
RUN2
RUN1 FREQ
RUN
LTC3850-2
●
www.linear.com
EXTV
PGOOD
CC
10k
MODE SW1 TG1
PGOOD
SW2 TG2
BOOST1
BOOST2
100k
INTV
PGND
BG1
BG2
V
CC
IN
SENSE
CMDSH-3
CMDSH-3
0.1μF
4.7μF
0.1μF
is a trademark of Linear Technology Corporation.
COMMENTS
97% Effi ciency, No Sense Resistor, 16-Pin SSOP
Programmable Fixed Frequency from 200kHz to 550kHz
Up to 97% Effi ciency, 4V ≤ V
I
Very Low Dropout; V
QFN and SSOP Packages
Expandable from 2-Phase to 12-Phase,
4V ≤ V
0.6V ≤ V
Expandable PolyPhase from 3-Phase to 12-Phase
30μA I
Up to Six Phases, 0.8V ≤ V
30μA I
1.23V ≤ V
Single Output Version of LTC3850-2
4V ≤ V
OUT
2.2Ω
Up to 20A, Extremely Fast Transient Response
1μF
IN
Q
Q
IN
, 0.8V ≤ V
, 0.8V ≤ V
OUT
OUT
≤ 30V, 0.6V ≤ V
≤ 38V, 0.8V ≤ V
OUT
SW
≤ 6V, 4.5V ≤ V
≤ 0.93V
≤ 36V, 4V ≤ V
RJK0305DPB
RJK0301DPB
RJK0305DPB
RJK0301DPB
= 400kHz
OUT
OUT
IN
OUT
≤ 10V, 4V ≤ V
≤ 10V, 4V ≤ V
, 6.2V ≤ V
OUT
OUT
≤ 14V, 4V ≤ V
IN
OUT
IN
≤ 7V
≤ 5.5V
IN
2.21k
2.21k
≤ 32V,
© LINEAR TECHNOLOGY CORPORATION 2007
≤ 60V, 120μA I
0.56μH
≤ 7V, 4.5V ≤ V
0.56μH
≤ 36V, 0.8V ≤ V
L2
IN
L1
38502 TA02
≤ 100V, No R
IN
IN
≤ 36V
≤ 36V
IN
≤ 36V
10μF
2x
100μF
2x
Q
IN
LT 0908 • PRINTED IN USA
OUT
SENSE
≤ 28V
+
+
≤ (0.9)(V
180μF
C
330μF
2.5V
4x
OUT1
V
7V TO 14V
V
1.1V/30A
IN
OUT
IN
),
38502f