LTC3447

PRODUCTION

I²C Controllable Buck Regulator in 3mm × 3mm DFN

Data Sheet Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.42

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Part Details

I²C Programmable Output with 21.6mV Resolution
Overtemperature Protected
High Efficiency: Up to 93%
Very Low Quiescent Current: Only 33µA
600mA Output Current at V_IN = 3V
2.5V to 5.5V Input Voltage Range
1MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
Stable with Ceramic Capacitors
Shutdown Mode Draws <1µA Supply Current
±2% Output Voltage Accuracy
Standard (100kHz) or Fast Mode (400kHz) I²C
6-Bit Voltage DAC (0.69V to 2.05V)
Disable Burst Mode Operation
Enable Power Good Blanking
Optional External Start-Up Resistors
Soft-Start
10 Lead, 3mm × 3mm DFN Package

Part Models: 2
1ku List Price: Starting From $2.42

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3447EDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3447EDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Multiple Output Buck Regulators 1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Single-Supply Monitors 1
LTC2934	PRODUCTION	Ultra-Low Power Adjustable Supervisor with Power-Fail Output

Evaluation Kits

LTC3447EDD Demo Board | I2C-Controllable Buck, 2.5V ≤ VIN ≤ 5.5V, VOUT = 0.7V to 2V @ 0.6A

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Product Details

Demonstration Circuit 767 is an I²C-controlled high efficiency synchronous current mode buck regulator featuring the 600mA output LTC3447. The demo board input voltage range is 2.5V to 5.5V. The buck regulator has a programmable output range of 0.7V to 2.00V which is set with an internal 6-bit DAC via the I²C interface. The initial start-up voltage is set to 1.35V but can be change by changing feedback resistors R4 and R5.