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Part Number: LTC3526B
Description: The LTC®3526/LTC3526B are synchronous, fi xed frequency step-up DC/DC converters with output...
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LTC3526B
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DataSheet
General Description
LTC3526B General Description
The LTC®3526/LTC3526B are synchronous, fi xed frequency step-up DC/DC converters with output disconnect. Synchronous rectifi cation enables high effi ciency in the low profi le 2mm * 2mm DFN package. Battery life in single AA/AAA powered products is extended further with an 850mV start-up voltage and operation down to 500mV once started.
A switching frequency of 1MHz minimizes solution footprint by allowing the use of tiny, low profi le inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The LTC3526 features automatic Burst Mode operation at light load conditions, while the LTC3526B features continuous switching at light loads. Anti-ringing control circuitry also reduces EMI concerns by damping the inductor in discontinuous mode.
Additional features include a low shutdown current of under 1A and thermal shutdown. The LTC3526/LTC3526B are housed in a 2mm * 2mm * 0.75mm DFN package.
LTC3526B Maximum Ratings
VIN Voltage .............................................. 0.3V to 6V
SW Voltage
DC ............................................................ 0.3V to 6V
Pulsed <100ns ......................................... 0.3V to 7V
SHDN, FB Voltage ..................................... 0.3V to 6V
VOUT ......................................................... 0.3V to 6V
Operating Temperature Range (Note 2)...40 to 85
Storage Temperature Range ................. 65 to 150
SW Voltage
DC ............................................................ 0.3V to 6V
Pulsed <100ns ......................................... 0.3V to 7V
SHDN, FB Voltage ..................................... 0.3V to 6V
VOUT ......................................................... 0.3V to 6V
Operating Temperature Range (Note 2)...40 to 85
Storage Temperature Range ................. 65 to 150
LTC3526B Features
` Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
` VIN Start-Up Voltage: 850mV
` 1.6V to 5.25V VOUT Range
` Up to 94% Effi ciency
` Output Disconnect
` 1MHz Fixed Frequency Operation
` VIN > VOUT Operation
` Integrated Soft-Start
` Current Mode Control with Internal Compensation
` Automatic Burst Mode® Operation with 9A Quiescent Current (LTC3526)
` Low Noise PWM Operation (LTC3526B)
` Internal Synchronous Rectifi er
` Logic Controlled Shutdown (IQ < 1A)
` Anti-Ringing Control
` Low Profi le (2mm * 2mm * 0.75mm) DFN Package
` VIN Start-Up Voltage: 850mV
` 1.6V to 5.25V VOUT Range
` Up to 94% Effi ciency
` Output Disconnect
` 1MHz Fixed Frequency Operation
` VIN > VOUT Operation
` Integrated Soft-Start
` Current Mode Control with Internal Compensation
` Automatic Burst Mode® Operation with 9A Quiescent Current (LTC3526)
` Low Noise PWM Operation (LTC3526B)
` Internal Synchronous Rectifi er
` Logic Controlled Shutdown (IQ < 1A)
` Anti-Ringing Control
` Low Profi le (2mm * 2mm * 0.75mm) DFN Package
LTC3526B Typical Application
· Medical Instruments
· Flash-Based MP3 Players
· Noise Canceling Headphones
· Wireless Mice
· Bluetooth Headsets
· Flash-Based MP3 Players
· Noise Canceling Headphones
· Wireless Mice
· Bluetooth Headsets
LTC3526B Connection Diagram
LTC0157
PDF/DataSheet Download
- Datasheet: LTC0157
- File Size: 163926 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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The LTC®3526/LTC3526B are synchronous, fi xed frequency step-up DC/DC converters with output disconnect. Synchronous rectifi cation enables high effi ciency in the low profi le 2mm * 2mm DFN package. Battery life in single AA/AAA ...
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