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LTC3404

Features: `High Efficiency: Up to 95%` Very Low Quiescent Current: Only 10A During Operation` 600mA Output Current at VIN = 3.3V` 2.65V to 6V Input Voltage Range` 1.4MHz Constant Frequency Operation` Synchronizable from 1MHz to 1.7MHz` Selectable Burst ModeTM Operation or Pulse Skipping Mode` No S...

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SeekIC No. : 004402199 Detail

LTC3404: Features: `High Efficiency: Up to 95%` Very Low Quiescent Current: Only 10A During Operation` 600mA Output Current at VIN = 3.3V` 2.65V to 6V Input Voltage Range` 1.4MHz Constant Frequency Operation...

LTC3404 Data Sheet

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Part Number:
LTC3404
Supply Ability:
5000

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

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Product Details

Description



Features:

`High Efficiency: Up to 95%
` Very Low Quiescent Current: Only 10A During Operation
` 600mA Output Current at VIN = 3.3V
` 2.65V to 6V Input Voltage Range
` 1.4MHz Constant Frequency Operation
` Synchronizable from 1MHz to 1.7MHz
` Selectable Burst ModeTM Operation or Pulse Skipping Mode
` No Schottky Diode Required
` Low Dropout Operation: 100% Duty Cycle
` 0.8V Reference Allows Low Output Voltages
` Shutdown Mode Draws < 1A Supply Current
` ±2% Output Voltage Accuracy
` Current Mode Control for Excellent Line and Load Transient Response
` Overcurrent and Overtemperature Protected
` Available in 8-Lead MSOP Package


Application

· Cellular Telephones
· Wireless and DSL Modems
· Personal Information Appliances
· Portable Instruments
· Distributed Power Systems
· Battery-Powered Equipment


Pinout

Connection Diagram


Specifications

Input Supply Voltage (VIN)..........................0.3V to 7V
ITH, PLL LPF Voltage ...............................0.3V to 2.7V
RUN, VFB Voltages .................................... 0.3V to VIN
SYNC/MODE Voltage ................................. 0.3V to VIN
SW Voltage ................................. 0.3V to (VIN + 0.3V)
P-Channel MOSFET Source Current (DC) ............ 800mA
N-Channel MOSFET Sink Current (DC) ................ 800mA
Peak SW Sink and Source Current ......................... 1.5A
Operating Ambient Temperature Range
(Note 2) ................................................... 40 to 85
Junction Temperature (Note 3) ............................. 125
Storage Temperature Range ..................65 to 150
Lead Temperature (Soldering, 10 sec)................... 300


Description

The LTC®3404 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 10mA and drops to < 1A in shutdown. The 2.65V to 6V input voltage range makes the LTC3404 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.

Switching frequency is internally set at 1.4MHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications the LTC3404 can be externally synchronized from 1MHz to 1.7MHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low, preventing low frequency ripple from interfering with audio circuitry.

The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.8V feedback reference voltage. The LTC3404 is available in a space saving 8-lead MSOP package.

For higher input voltage (11V abs max) applications, refer to the LTC1877 data sheet.




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