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LTC3812-5

Features: High Voltage Operation: Up to 60VLarge 1 Gate DriversNo Current Sense Resistor RequiredDual N-Channel MOSFET Synchronous DriveExtremely Fast Transient Response±0.5% 0.8V Voltage ReferenceProgrammable Soft-StartGenerates 5.5V Driver SupplySelectable Pulse Skip Mode OperationPower Good Out...

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SeekIC No. : 004402365 Detail

LTC3812-5: Features: High Voltage Operation: Up to 60VLarge 1 Gate DriversNo Current Sense Resistor RequiredDual N-Channel MOSFET Synchronous DriveExtremely Fast Transient Response±0.5% 0.8V Voltage ReferenceP...

LTC3812-5 Data Sheet

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Part Number:
LTC3812-5
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

 High Voltage Operation: Up to 60V
 Large 1 Gate Drivers
 No Current Sense Resistor Required
 Dual N-Channel MOSFET Synchronous Drive
 Extremely Fast Transient Response
 ±0.5% 0.8V Voltage Reference
 Programmable Soft-Start
 Generates 5.5V Driver Supply
 Selectable Pulse Skip Mode Operation
 Power Good Output Voltage Monitor
 Adjustable On-Time/Frequency: tON(MIN) < 100ns
 Adjustable Cycle-by-Cycle Current Limit
 Undervoltage Lockout On Driver Supply
 Output Overvoltage Protection
 Thermally Enhanced 16-Pin TSSOP Package


Application

 48V Telecom and Base Station Power Supplies
 Networking Equipment, Servers
 Automotive and Industrial Control Systems


Pinout

Connection Diagram 


Specifications

Supply Voltages
INTVCC ................................................... 0.3V to 14V
(INTVCC PGND), (BOOST SW) ............. 0.3V to 14V
BOOST (Continuous) ............................... 0.3V to 85V
BOOST (400ms) .................................... 0.3V to 95V
EXTVCC .................................................... 0.3V to 15V
(EXTVCC INTVCC) .................................... 12V to 12V
(NDRV INTVCC) Voltage ......................... 0.3V to 10V
SW Voltage (Continuous) ............................ 1V to 70V
SW Voltage (400ms) .................................... 1V to 80V
ION Voltage (Continuous) ......................... 0.3V to 70V
ION Voltage (400ms) ................................. 0.3V to 80V
RUN/SS Voltage .......................................... 0.3V to 5V
PGOOD Voltage .......................................... 0.3V to 7V
VRNG, FCB Voltages .................................. 0.3V to 14V
FB Voltage ............................................... 0.3V to 2.7V
TG, BG, INTVCC, EXTVCC RMS Currents .................50mA
Operating Temperature Range (Note 2)
LTC3812E-5 ............................................. 40 to 85
LTC3812I-5 ............................................ 40 to 125
Junction Temperature (Notes 3, 7)........................ 125
Storage Temperature Range ...................65 to 150
Lead Temperature (Soldering, 10 sec) .................. 300


Description

The LTC3812-5 is a synchronous step-down switching regulator controller that can directly step down voltages from up to 60V input, making it ideal for telecom and automotive applications. The LTC3812-5 uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit without requiring a sense resistor.

A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifi er provides very fast line and load transient response. Large 1 gate drivers allow the LTC3812-5 to drive large power MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN. A shutdown pin allows the LTC3812-5 to be turned off reducing the supply current to <230A.

Integrated bias control generates gate drive power from the input supply during start-up and when an output shortcircuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher effi ciency.




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