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LTC1649

Features: ·High Power 3.3V to 1.xV-2.xV Switching Regulator Controller: Up to 20A Output·All N-Channel External MOSFETs·Provides 5V MOSFET Gate Drive with 3.3V Input·Constant Frequency Operation Minimizes Inductor Size·Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations·Hig...

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SeekIC No. : 004401770 Detail

LTC1649: Features: ·High Power 3.3V to 1.xV-2.xV Switching Regulator Controller: Up to 20A Output·All N-Channel External MOSFETs·Provides 5V MOSFET Gate Drive with 3.3V Input·Constant Frequency Operation Min...

LTC1649 Data Sheet

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Part Number:
LTC1649
Supply Ability:
5000

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

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Product Details

Description



Features:

·High Power 3.3V to 1.xV-2.xV Switching Regulator Controller: Up to 20A Output
·All N-Channel External MOSFETs
·Provides 5V MOSFET Gate Drive with 3.3V Input
·Constant Frequency Operation Minimizes Inductor Size
·Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations
·High Efficiency: Over 90% Possible
·No Low-Value Sense Resistor Needed
·Available in 16-Lead SO Package


Application

·3.3V Input Power Supply for Low Voltage Microprocessors and Logic
·Low Input Voltage Power Supplies
·High Power, Low Voltage Regulators
·Local Regulation for Multiple Voltage Distributed Power Systems


Pinout

Connection Diagram


Specifications

Supply Voltage
VIN ...................................................................................... 6V
VCC...................................................................................... 9V
PVCC1, 2 ........................................................................... 13V
Input Voltage
IFB ..................................................................... 0.3V to 18V
C+, C ................................................. 0.3V to (VIN + 0.3V)
All Other Inputs ................................... 0.3V to (VCC + 0.3V)
Operating Temperature Range ......................... 0°C to 70°C
Storage Temperature Range ..................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec)........................ 300°C


Description

The LTC®1649 is a high power, high efficiency switching  regulator controller optimized for use with very low supply voltages. It operates from 2.7V to 5V input, and provides a regulated output voltage from 1.26V to 2.5V at up to 20A load current. A typical 3.3V to 2.5V application features efficiency above 90% from 1A to 10A load. The LTC1649 uses a pair of standard 5V logic-level N-channel external MOSFETs, eliminating the need for expensive P-channel or super-low-threshold devices.

The LTC1649 shares its internal switching architecture with the LTC1430, and features the same ±1% line, load and temperature regulation characteristics. Current limit is user-adjustable without requiring an external low-value sense resistor. The LTC1649 uses a 200kHz switching frequency and voltage mode control, minimizing external component count and size. Shutdown mode drops the quiescent current to below 10A.

The LTC1649 is available in the 16-pin narrow SO package.




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