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Part Number: LTC3528B
Description: The LTC®3528/LTC3528B are synchronous, fi xed frequency step-up DC/DC converters with o...
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LTC3528B
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General Description
LTC3528B General Description
The LTC®3528/LTC3528B are synchronous, fi xed frequency step-up DC/DC converters with output disconnect. High effi ciency synchronous rectifi cation, in addition to a 700mV start-up voltage and operation down to 500mV once started, provides longer run-time for single or multiple cell battery-powered products.
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 is internally compensated, simplifying the design process. The LTC3528 enters Burst Mode operation at light loads, while the LTC3528B features continuous switching at light loads. Anti-ringing circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current, open-drain power good output, shortcircuit protection and thermal overload protection.
The LTC3528/LTC3528B are offered in an 8-lead 3mm × 2mm × 0.75mm DFN package.
LTC3528B 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
PGOOD ..................................................... 0.3V to 6V
Operating Temperature Range
(Notes 2, 5) ........................................... 40 to 85
Storage Temperature Range ................ 65to 125
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
PGOOD ..................................................... 0.3V to 6V
Operating Temperature Range
(Notes 2, 5) ........................................... 40 to 85
Storage Temperature Range ................ 65to 125
LTC3528B Features
Delivers 3.3V at 200mA from a Single Alkaline/NiMH Cell or 3.3V at 400mA from Two Cells
VIN Start-Up Voltage: 700mV
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
Burst Mode® Operation with 12A Quiescent Current (LTC3528)
Low Noise PWM Operation (LTC3528B)
Internal Synchronous Rectifi er
Logic Controlled Shutdown: <1A
Anti-Ringing Control
Low Profi le (3mm * 2mm * 0.75mm) DFN Package
VIN Start-Up Voltage: 700mV
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
Burst Mode® Operation with 12A Quiescent Current (LTC3528)
Low Noise PWM Operation (LTC3528B)
Internal Synchronous Rectifi er
Logic Controlled Shutdown: <1A
Anti-Ringing Control
Low Profi le (3mm * 2mm * 0.75mm) DFN Package
LTC3528B 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
LTC3528B Connection Diagram
LTC0157
PDF/DataSheet Download
- Datasheet: LTC0157
- File Size: 163926 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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