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LTC3542-1

Features: High Effi ciency: Up to 96% Fixed Output Voltage: 2.8V High Peak Switch Current: 1000mA Low Output Ripple (<20mVP-P Typical)Burst Mode Operation Very Low Quiescent Current: Only 26A2.5V to 5.5V Input Voltage Range2.25MHz Constant Frequency Operation 1MHz to 3MHz External Frequency Sy...

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SeekIC No. : 004402285 Detail

LTC3542-1: Features: High Effi ciency: Up to 96% Fixed Output Voltage: 2.8V High Peak Switch Current: 1000mA Low Output Ripple (<20mVP-P Typical)Burst Mode Operation Very Low Quiescent Current: Only 26A2.5...

LTC3542-1 Data Sheet

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Part Number:
LTC3542-1
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 Effi ciency: Up to 96%
Fixed Output Voltage: 2.8V
High Peak Switch Current: 1000mA
Low Output Ripple (<20mVP-P Typical)
Burst Mode Operation
Very Low Quiescent Current: Only 26A
2.5V to 5.5V Input Voltage Range
2.25MHz Constant Frequency Operation
1MHz to 3MHz External Frequency Synchronization
Low Dropout Operation: 100% Duty Cycle
No Schottky Diode Required
Internal Soft-Start Limits Inrush Current
Shutdown Mode Draws <1A Supply Current
±2% Output Voltage Accuracy
Current Mode Operation for Excellent Line and Load
Transient Response
Overtemperature Protected
 Available in 6-Lead 2mm * 2mm DFN


Application

Cellular Telephones
Wireless and DSL Modems
Digital Cameras
MP3 Players
PDAs and Other Handheld Devices


Pinout

Connection Diagram


Specifications

Input Supply Voltage (VIN) ........................... 0.3V to 6V
VOUT, RUN Voltages ......................................0.3V to VIN
MODE Voltage ................................0.3V to (VIN + 0.3V)
SW Voltage ....................................0.3V to (VIN + 0.3V)
Operating Temperature Range (Note 2).... 40 to 85
Junction Temperature (Note 7) ............................. 125
Storage Temperature Range ................... 65 to 150
Refl ow Peak Body Temperature ............................ 260


Description

The LTC®3542-1 is a high effi ciency, fi xed output voltage of 2.8V, monolithic synchronous buck converter using a constant frequency, current mode architecture. Supply current during operation is only 26A, dropping to <1A in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3542-1 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Internal power switches are optimized to provide high effi ciency and eliminate the need for an external Schottky diode.

Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors, and it can synchronize to an external clock signal with a frequency range of 1MHz to 3MHz through the MODE/SYNC pin. The LTC3542-1 is specifi cally designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The LTC3542-1 can be confi gured for the power saving Burst Mode® Operation. For reduced noise and RF interference, the MODE/SYNC pin can be confi gured for pulse skipping operation




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