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LTC3458

Features: High Efficiency: Up to 93% Inrush Current Limiting and Output Disconnect Programmable Output Voltages up to 7.5V 1.5V to 6V Input Range Programmable/Synchronizable Fixed FrequencyOperation up to 1.5MHz Programmable Automatic Burst Mode®Operation Current Mode Control with Programmabl...

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LTC3458: Features: High Efficiency: Up to 93% Inrush Current Limiting and Output Disconnect Programmable Output Voltages up to 7.5V 1.5V to 6V Input Range Programmable/Synchronizable Fixed FrequencyOperatio...

LTC3458 Data Sheet

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Part Number:
LTC3458
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 Efficiency: Up to 93%
Inrush Current Limiting and Output Disconnect
Programmable Output Voltages up to 7.5V
1.5V to 6V Input Range
Programmable/Synchronizable Fixed FrequencyOperation up to 1.5MHz
Programmable Automatic Burst Mode®Operation
Current Mode Control with Programmable Soft-StartPeriod and Peak Current Limit
700mA at 7V from 5V Input
0.3Ω N-Channel and 0.4Ω P-Channel 1.4A Switches
at 5VOUT
Ultralow Quiescent Currents: 15µA Sleep, <1µA in
Shutdown
3mm * 4mm Thermally Enhanced DFN Package


Application

Point-of-Load Regulators
USB VBUS Power
LCD Bias
OLED Displays


Pinout

Connection Diagram


Specifications

VIN, SS, SYNC Voltages ................................. 0.3 to 7V
BURST, SHDN, VOUT Voltages ....................... 0.3 to 8V
Operating Temperature Range
(Notes 2, 3) ..........................................40°C to 85°C
Storage Temperature Range ..............65°C to 125°C
SW Voltage
DC .............................................................. 0.3V to 8V
Pulsed <100ns ......................................... 0.3V to 10V


Description

The LTC 3458 is a high efficiency, current mode, fixedfrequency, step up DC/DC converter with true outputdisconnect and inrush current limiting. The LTC3458 israted for a 7.5V output and includes a 0.3Ω N-channelMOSFET switch and a 0.4Ω P-channel MOSFET synchro-nous rectifier. The LTC3458 is well suited for batterypowered applications and includes programmable outputvoltage, switching frequency and loop compensation. Theoscillator frequency can be set up to 1.5MHz or synchro-nized to an external clock.

Quiescent current is only 15µA during Burst Mode opera-tion maximizing battery life in portable applications. TheBurst Mode current threshold, peak current limit, and soft-start are externally programmable. Other features include<1µA shutdown current, antiringing control, and thermallimit. The LTC3458 is available in a low profile (0.75mm),3mm × 4mm 12-pin DFN package.




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