lt3781 Linear Technology Corporation, lt3781 Datasheet - Page 20

• Manufacturer Part Number: lt3781
• Description: Bootstrap Start Dual Transistor Synchronous Forward Controller
• Manufacturer: Linear Technology Corporation

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LT3781
PART NUMBER
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LTC
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No R
20
®
1530
SENSE
, ThinSOT and Hot Swap are trademarks of Linear Technology Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
DESCRIPTION
Half-Bridge N-Channel MOSFET Driver
Half-Bridge N-Channel MOSFET Driver
Dual Half-Bridge N-Channel MOSFET Driver
Half-Bridge N-Channel MOSFET Driver
High Power Synchronous DC/DC Controller
High Power Step-Down Switching Regulator Controller
No R
Negative Voltage Hot Swap
High Power DC/DC Current Mode Step-Up Controller
Dual Transistor Synchronous Foward Controller
Overvoltage Protection Controller in ThinSOT
Secondary Synchronous Rectifier Controller
Synchronous Step-Down Controller
Synchronous Phase Modulated Full-Bridge Controller
2-Phase 42A Synchronous Controller
Secondary Side Synchronous Post Regulator
550kHz, Dual 2-Phase Synchronous Controller
SENSE
FAX: [phone] www.linear.com
TM
Synchronous Controller
TM
Controller
TM
Package
COMMENTS
Current Limit Protection, 100% of Duty Cycle
Up to 60V Input Supply, No Shoot-Through
V
Smooth Operation at High Duty Cycle (95% to 100%)
60V Dual N-Channel MOSFET Controller
Excellent for 5V to 3.x Up to 50A
97% Efficient, 1.19V V
Allows Safe Board Insertion and Removal from a Live –48V Backplane,
Operates from –10V to –80V
High Side Current Sense, Up to 60V Input
Operation up to 72V Maximum
Crowbar or External N-Channel MOSFET Disconnect,
Monitors Two Output Voltages
Use with the LT1681, Isolated Power Supplies, Contains Voltage Merging,
Optocoupler Driver, Synchronization Circuit with the Primary Side
Current Mode, 3.5V V
50W to 2kW Power Supply Design, Adaptive Direct Sense ZVS
Minimizes C
Generates Auxiliary Output in Isolated DC/DC Converters,
Programmable Current Limit Protection, 0.8V 1.5% Reference
High Frequency Reduces Size of Inductors, Minimum C
I
OUT1, 2
2% Overvoltage Threshold Protection Accuracy, Gate Drive for SCR
IN
to 60V, Good for Full-Bridge Applications
up to 20A
IN
and C
OUT
IN
, 4V V
IN
36V, 0.5V V
36V, 1.19V V
IN
36V, 300kHz
LINEAR TECHNOLOGY CORPORATION 2001
OUT
OUT
5V
LT/TP 0303 2K • PRINTED IN USA
V
IN
IN
, 4V V
IN
36V,
3781f