LTC3545
LTC3545-1

PRODUCTION

Triple 800mA Synchronous Step-Down Regulator - 2.25MHz

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.72

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Part Details

Three 800mA Outputs
High Efficiency: Up to 95%
2.25V to 5.5V Input Voltage Range
Low Ripple (<20mV_P-P) Burst Mode^® Operation I_Q: 58uA
2.25MHz Constant Frequency Operation
Synchronizable to External 1MHz to 3MHz Clock
Power Good Indicators Ease Supply Sequencing
0.6V Reference Allows Low Output Voltages
Current Mode Operation/Excellent Transient Response
Low Proﬁle 16-Lead 3mm × 3mm QFN Package

Part Models: 8
1ku List Price: Starting From $3.72

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
LTC3545EUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3545EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3545EUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3545EUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3545IUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3545IUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3545IUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3545IUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Temperature Sensors 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
Dual-Supply Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Silicon Oscillators 1
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Triple-Supply Monitors 1
LTC2911	RECOMMENDED FOR NEW DESIGNS	Precision Triple Supply Monitor with Power-Fail Comparator

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3545
LTC3545-1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LTC3545EUD Demo Board | 2.25V to 5.5VIN, 1.2V @ 0.8A, 1.5V @ 0.8A, 1.8V @ 0.8A; PGOOD Pin, Burst Mode Only

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Product Details

Demonstration circuit 1193 is a triple output regulator consisting of three constant-frequency step-down converters integrated into LTC3545/-1. DC1193 has an input voltage range of 2.25V to 5.5V, with regulators capable of delivering 800mA of load current on each output. The three regulators operate independently with individual RUN pins and enter pulse skipping mode at low loads for reducing output ripple. In shutdown, the DC1193 draws less than 1uA total. The DC1193 is a very efficient circuit with efficiency reading above 90%. The LTC3545 comes in a 16-pin QFN package, which has an exposed pad on the bottomside of the IC for better thermal performance. High operating frequency of 2.25MHz allows exclusive use of the small size, low profile surface mount components. These features plus internal compensation circuits, make the DC1193 demo board an ideal circuit for use in battery-powered, hand-held applications. DC1193A-A is a demoboard for LTC3545 and DC1193A-B is a demoboard for LCT3545-1.