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LTC3405A-1.375

Features: High Efficiency: Up to 90% Very Low Quiescent Current: Only 20µA 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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LTC3405A-1.375: Features: High Efficiency: Up to 90% Very Low Quiescent Current: Only 20µA During Operation 300mA Output Current at VIN = 3V 2.5V to 5.5V Input Voltage Range 1.5MHz Constant Frequency Operati...

LTC3405A-1.375 Data Sheet

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Part Number:
LTC3405A-1.375
Supply Ability:
5000

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

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Product Details

Description



Features:

High Efficiency: Up to 90%
Very Low Quiescent Current: Only 20µA 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 <1µA 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°C to 85°C
Junction Temperature (Note 3) ................................ 125°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec)...................... 300°C


Description

The LTC®3405A-1.375 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20µA and drops to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3405A-1.375 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-1.375 is 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-1.375 is available in a low profile (1mm) ThinSOT package.

For other output voltages, refer to the LTC3405A and LTC3405A-1.5/LTC3405A-1.8 data sheets.




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