LTC3614
PRODUCTION4A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter
- Part Models
- 8
- 1ku List Price
- Starting From $5.23
Overview
- 4A Output Current
- 2.25V to 5.5V Input Voltage Range
- Low Output Ripple Burst Mode® Operation: IQ = 75μA
- ±1% Output Voltage Accuracy
- Output Voltage Down to 0.6V
- High Efficiency: Up to 95%
- Low Dropout Operation: 100% Duty Cycle
- Programmable Slew Rate on SW Node Reduces Noise and EMI
- Adjustable Switching Frequency: Up to 4MHz
- Optional Active Voltage Positioning (AVP) with Internal Compensation
- Selectable Pulse-Skipping/Forced Continuous/Burst Mode Operation with Adjustable Burst Clamp
- Programmable Soft-Start
- Inputs for Start-Up Tracking or External Reference
- DDR Memory Mode, IOUT = ±3A
- Available in a 24-Pin 3mm × 5mm QFN Thermally Enhanced Package
The LTC3614 is a low quiescent current monolithic synchronous buck regulator using a current mode, constant frequency architecture. The no-load DC supply current in sleep mode is only 75μA while maintaining the output voltage (Burst Mode operation) at no load, dropping to zero current in shutdown. The 2.25V to 5.5V input supply voltage range makes the LTC3614 ideally suited for single Li-Ion as well as fixed low voltage input applications. 100% duty cycle capability provides low dropout operation, extending the operating time in battery-powered systems.
The operating frequency is externally programmable up to 4MHz, allowing the use of small surface mount inductors. For switching-noise-sensitive applications, the LTC3614 can be synchronized to an external clock at up to 4MHz.
Forced continuous mode operation in the LTC3614 reduces noise and RF interference. Adjustable compensation allows the transient response to be optimized over a wide range of loads and output capacitors.
The internal synchronous switch increases efficiency and eliminates the need for an external catch diode, saving external components and board space. The LTC3614 is offered in a leadless 24-pin 3mm × 5mm thermally enhanced QFN package.
Applications
- Point-of-Load Supplies
- Distributed Power Supplies
- Portable Computer Systems
- DDR Memory Termination
- Handheld Devices
Documentation
Data Sheet 1
User Guide 1
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 |
|---|---|---|---|
| LTC3614EUDD#PBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LTC3614EUDD#TRPBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LTC3614HUDD#PBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LTC3614HUDD#TRPBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LTC3614IUDD#PBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LTC3614IUDD#TRPBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LTC3614MPUDD#PBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LTC3614MPUDD#TRPBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 30, 2020 - 20_0244 Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan) |
||
| LTC3614EUDD#PBF | PRODUCTION | |
| LTC3614EUDD#TRPBF | PRODUCTION | |
| LTC3614HUDD#PBF | PRODUCTION | |
| LTC3614HUDD#TRPBF | PRODUCTION | |
| LTC3614IUDD#PBF | PRODUCTION | |
| LTC3614IUDD#TRPBF | PRODUCTION | |
| LTC3614MPUDD#PBF | PRODUCTION | |
| LTC3614MPUDD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Supervisory Circuits & Reset ICs 1 | ||
| LTC2935 | PRODUCTION | Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3614
LTpowerCAD 1
Design tools for the following parts are available in LTpowerCAD:
- LTC3614
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.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Evaluation Kits
Reference Designs
Part Used
