LTC3878 Linear Technology Corporation, LTC3878 Datasheet - Page 24

• Manufacturer Part Number: LTC3878
• Description: Wide Operating Range No RSENSE Step-Down Controller
• Manufacturer: Linear Technology Corporation

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LTC3878
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24
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PolyPhase is a registered trademark fo Linear Technology Corporation. No R
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
DESCRIPTION
8A/6A Monolithic Synchronous Step-Down DC/DC Converters Optimized for High Step-Down Ratios, V
12A/10A Monolithic Synchronous Step-Down DC/DC
Converters
Dual, 2-Phase, Constant On-Time No R
Step-Down Controller with Output Tracking
2-Phase 550kHz, Dual Synchronous Step-Down Controller
No R
Margining, PLL and Tracking
No R
Controller
Dual, PolyPhase
20A to 200A
Constant On-Time Synchronous No R
Controller with Differential Output Sensing
Low I
Cycle, Programmable Operating Frequency
Controllers
Dual, 2-Phase Synchronous Step-Down Controller with
Tracking
Low I
Programmable Operating Frequency
Low I
DC/DC Controller
Dual 2-Phase, High Effi ciency Synchronous Step-Down
Controllers
Triple Output, Multiphase Synchronous Step-Down Controller R
No R
Controller
10A Complete Switch Mode Power Supply
12A Complete Switch Mode Power Supply
●
SENSE
SENSE
SENSE
SENSE
Q
Q
Q
FAX: [phone]
, High Voltage Current Mode Controller, 100% Duty
, High Voltage Current Mode Controller with
, High Voltage Single Output Synchronous Step-Down
Q
Q
Synchronous Step-Down Controller with Voltage
Constant On-Time Synchronous Step-Down
Wide Input Range Step-Down Controllers
Constant On-Time Synchronous Step-Down
, Dual, 2-Phase Synchronous Step-Down
, Synchronous Step-Down Controller
®
Synchronous Step-Down Controller,
●
www.linear.com
SENSE
SENSE
Step-Down
Synchronous
SENSE
is a trademark of Linear Technology Corporation.
COMMENTS
Optimized for High Step-Down Ratios, V
Fast Transient Response Reduces C
0.6V ≤ V
QFN and SSOP Packages
0.6V ≤ V
Extremely Fast Transient Response, t
4V ≤ V
Differential Remote Sense Amplifi er, R
Fast Transient Response, 4.5V ≤ V
Tracking and PLL Synchronization
V
Operation, 40μA I
30μA I
Up to Six Phases, 0.8V ≤ V
30μA I
V
Operation, 120μA I
1.23V ≤ V
R
Frequency, 4V ≤ V
4V ≤ V
Sense, MSOP-16, SSOP-16, 3mm × 3mm QFN-16
Extremely Fast Transient Response, t
4V ≤ V
92% Effi ciency, V
Ultrafast™ Transient Response
92% Effi ciency, V
Ultrafast Transient Response
IN
IN
SENSE
SENSE
Up to 60V, I
Up to 60V, I
Q
Q
IN
IN
IN
or DCR Current Sense, 250kHz to 780kHz Fixed Operating
or DCR Current Sensing, Tracking and Synchronizable
, 0.8V ≤ V
, 0.8V ≤ V
OUT
OUT
≤ 36V, 0.8V Reference
≤ 38V, Very Low Dropout with Tracking, DCR Current
≤ 38V, 0.6V Reference
OUT
≤ 6V, t
≤ (0.9)V
≤ 36V, 4V ≤ V
OUT
OUT
IN
IN
Q
OUT
OUT
IN
, MSOP-10 Package
ON(MIN)
Q
: 4.5V to 28V, True Current Mode Control,
: 4.5V to 28V, True Current Mode Control,
≤ 5A, Onboard Bias Regulator, Burst Mode
≤5V Onboard Bias Regulator, Burst Mode
, Sync Capability, 16-Lead TSSOP Package
≤ 30V, 0.8V ≤ V
IN
≤ 10V, 4V ≤ V
≤ 10V, 4V ≤ V
, 4V ≤ V
< 83ns
OUT
IN
≤ 60V, 120μA I
© LINEAR TECHNOLOGY CORPORATION 2009
IN
≤ 5.25V, 4.5V ≤ V
≤ 36V, I
IN
IN
IN
OUT
OUT
≤ 36V, 0.6V ≤ V
ON(MIN)
ON(MIN)
≤ 36V
≤ 36V
SENSE
, 4V ≤ V
≤ 5.25V
IN
IN
OUT
Up to 18V/32V
Up to 24V/32V
or DCR Current Sense
≤ 100ns,
Q
= 43ns,
Up to 20A
LT 0109 • PRINTED IN USA
IN
IN
≤ 36V,
≤ 28V
OUT
≤ 0.9V
IN
,
3878f