LTC3530 - Wide Input Voltage Synchronous Buck-Boost DC/DC Converter

The LTC3530 is pin compatible with the LTC3440 buckboost DC/DC converter but adds programmable automatic Burst Mode operation and extends the VIN/VOUT range to 1.8V. Switching frequencies up to 2MHz are programmed with an external resistor. Automatic Burst Mode operation allows the user to program the load current threshold for Burst Mode operation using a single resistor from the BURST pin to GND.

Other features include 1µA shutdown, short circuit protection, programmable soft-start control, current limit and thermal shutdown. The LTC3530 is available in a thermally enhanced 10-lead (3mm × 3mm) DFN or MSOP package.

Features

Regulated Output with Input Voltages Above, Below or Equal to the Output
1.8V to 5.5V Input and 1.8V to 5.25V Output Range
250mA Continuous Output Current from 1.8V VIN
600mA Continuous/1A Peak Output Current from Li-Ion
Single Inductor
Synchronous Rectiﬁcation: Up to 96% Efﬁ ciency
Programmable Automatic Burst Mode® Operation
Output Disconnect in Shutdown
Pin Compatible with the LTC3440
Programmable Frequency from 300kHz to 2MHz
<1µA Shutdown Current
Small Thermally Enhanced 10-Lead (3mm × 3mm) DFN and 10-Lead MS Packages

Typical Application

Applications

MP3 Players
Handheld Instruments
Digital Cameras
Smart Phones
Portable GPS Units
Miniature Hard Disk Drive Power

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC3530EDD#PBF	3x3 DFN-10	E	$4.24	$2.75
LTC3530EDD#TRPBF	3x3 DFN-10	E		$2.80
LTC3530EMS#PBF	MS-10	E	$4.24	$2.75
LTC3530EMS#TRPBF	MS-10	E		$2.80

Demo Boards

Part Number	Description	Price
DC938A	LTC3530EDD \| Low Vin, 600mA Buck-Boost Converter	$125.00