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LTC3407

Features: High Efficiency: Up to 96% Very Low Quiescent Current: Only 40µA 1.5MHz Constant Frequency Operation High Switch Current: 1A on Each Channel No Schottky Diodes Required Low RDS(ON) Internal Switches: 0.35Ω Current Mode Operation for Excellent Line and Load Transient Response...

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SeekIC No. : 004402217 Detail

LTC3407: Features: High Efficiency: Up to 96% Very Low Quiescent Current: Only 40µA 1.5MHz Constant Frequency Operation High Switch Current: 1A on Each Channel No Schottky Diodes Required Low RDS(ON) ...

LTC3407 Data Sheet

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Part Number:
LTC3407
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 96%
Very Low Quiescent Current: Only 40µA
1.5MHz Constant Frequency Operation
High Switch Current: 1A on Each Channel
No Schottky Diodes Required
Low RDS(ON) Internal Switches: 0.35Ω
Current Mode Operation for Excellent Line and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Ultralow Shutdown Current: IQ < 1µA
Output Voltages from 5V down to 0.6V
Power-On Reset Output
Externally Synchronizable Oscillator
Small Thermally Enhanced MSOP and 3mm * 3mm DFN Packages


Application

PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
Wireless and DSL Modems


Pinout

Connection Diagram


Specifications

VIN Voltages.....................................................0.3V to 6V
VFB1, VFB2, RUN1, RUN2
Voltages ............................................ 0.3V to VIN + 0.3V
MODE/SYNC Voltage .......................... 0.3V to VIN + 0.3V
SW1, SW2 Voltage ............................ 0.3V to VIN + 0.3V
POR Voltage ...................................................0.3V to 6V
Ambient Operating Temperature
Range (Note 2) ...................................... 40°C to 85°C
Junction Temperature (Note 5) ............................. 125°C
Storage Temperature Range
LTC3407EMSE .................................... 65°C to 150°C
LTC3407EDD ...................................... 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
LTC3407EMSE only ............................................... 300°C


Description

The LTC®3407 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 1.5MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 1A power switches provide high efficiency without the need for external Schottky diodes.

A user selectable mode input of LTC3407 is provided to allow the user to trade-off ripple noise for low power efficiency. Burst Mode® operation provides high efficiency at light loads, while Pulse Skip Mode provides low ripple noise at light loads.

To further maximize battery life, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40µA. In shutdown, the device draws <1µA.




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