LTC3608
PRODUCTION18V, 8A Monolithic Synchronous Step-Down DC/DC Converter
- Part Models
- 4
- 1ku List Price
- Starting From $11.32
Overview
- 8A Output Current
- Wide VIN Range = 4V to 18V
- Internal N-Channel MOSFETs
- True Current Mode Control
- Optimized for High Step-Down Ratios
- tON(MIN) ≤ 100nsec
- Extremely Fast Transient Response
- Stable with Ceramic COUT
- ±1% 0.6V Voltage Reference
- Power Good Output Voltage Monitor
- Adjustable On-Time/Switching Frequency
- Adjustable Current Limit
- Programmable Soft-Start
- Output Overvoltage Protection
- Optional Short-Circuit Shutdown Timer
- Low Shutdown IQ: 15μA
- Available in a 7mm × 8mm 52-Lead QFN Package
The LTC3608 is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 8A output current from a 4V to 18V (20V maximum) input supply. It uses a valley current control architecture to deliver very low duty cycle operation at high frequency with excellent transient response. The operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT.
The LTC3608 can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads.
Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and an optional short-circuit shutdown timer. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit is user programmable. A power good output voltage monitor indicates when the output is in regulation. The LTC3608 is available in a compact 7mm × 8mm QFN package.
Applications
- Point of Load Regulation
- Distributed Power Systems
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 2
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 |
|---|---|---|---|
| LTC3608EWKG#PBF | 52-Lead QFN (7mm x 7mm x 0.75mm w/ EP) | ||
| LTC3608EWKG#TRPBF | 52-Lead QFN (7mm x 7mm x 0.75mm w/ EP) | ||
| LTC3608IWKG#PBF | 52-Lead QFN (7mm x 7mm x 0.75mm w/ EP) | ||
| LTC3608IWKG#TRPBF | 52-Lead QFN (7mm x 7mm x 0.75mm w/ EP) |
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 |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| 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:
- LTC3608
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
LTC3608EWKG Demo Board | Monolithic, 5V ≤ VIN ≤ 20V, VOUT = 1.5V/1.8V/2.5V/3.3V @ 8A
Resources
Reference Designs
Part Used
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