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LTC3405A-1.8

Features: *High Efficiency: Up to 93%* Very Low Quiescent Current: Only 20mA During Operation* 300mA Output Current at VIN = 3V* 2.5V to 5.5V Input Voltage Range* 1.5MHz Constant Frequency Operation* No Schottky Diode Required* Low Dropout Operation: 100% Duty Cycle* Stable with Ceramic Capacitors...

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SeekIC No. : 004402204 Detail

LTC3405A-1.8: Features: *High Efficiency: Up to 93%* Very Low Quiescent Current: Only 20mA During Operation* 300mA Output Current at VIN = 3V* 2.5V to 5.5V Input Voltage Range* 1.5MHz Constant Frequency Operation...

LTC3405A-1.8 Data Sheet

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Part Number:
LTC3405A-1.8
Supply Ability:
5000

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

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Product Details

Description



Features:

* High Efficiency: Up to 93%
* Very Low Quiescent Current: Only 20mA
   During Operation
* 300mA Output Current at VIN = 3V
* 2.5V to 5.5V Input Voltage Range
* 1.5MHz Constant Frequency Operation
* No Schottky Diode Required
* Low Dropout Operation: 100% Duty Cycle
* Stable with Ceramic Capacitors
* Shutdown Mode Draws <1mA Supply Current
* ±3% Output Voltage Accuracy
* Current Mode Operation for Excellent Line and
   Load Transient Response
* Overtemperature Protected
* Low Profile (1mm) ThinSOTTM Package


Application

* Cellular Telephones
* Personal Information Appliances
* Wireless and DSL Modems
* Digital Still Cameras
* MP3 Players
* Portable Instruments


Pinout

Connection Diagram


Specifications

Input Supply Voltage ...................................... 0.3V to 6V
MODE, RUN, VOUT Voltages............................ 0.3V to VIN
SW Voltage ...................................... 0.3V to (VIN + 0.3V)
P-Channel Switch Source Current (DC) .................... 400mA
N-Channel Switch Sink Current (DC) ........................ 400mA
Peak SW Sink and Source Current ........................... 630mA
Operating 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®3405A-1.5/LTC3405A-1.8 are high efficiency monolithic synchronous buck regulators using a constant frequency, current mode architecture. Supply current during operation is only 20mA and drops to <1mA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3405A-1.5/LTC3405A-1.8 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 1.5MHz, allowing the use of small surface mount inductors and capacitors.

The LTC3405A-1.5/LTC3405A-1.8 are specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The LTC3405A-1.5/LTC3405A-1.8 are available in a low profile (1mm) ThinSOT package.

For adjustable output voltage, refer to the LTC3405A data sheet.




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