DC2019B Internal Power Switch Buck Regulators by Analog Devices

Internal Power Switch Buck Regulators
Status: Production
Series: LT8614
RoHS: Compliant
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The LT8614 step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a 3mm × 4mm QFN, the monolithic construction with integrated power switches and inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultralow 2.5μA quiescent current—with the output in full regulation— enables

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Features

Silent Switcher® Architecture
Ultralow EMI Emissions
High Efficiency at High Frequency
Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT
Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT
Wide Input Voltage Range: 3.4V to 42V
Ultralow Quiescent Current Burst Mode® Operation:
2.5μA IQ Regulating 12VIN to 3.3VOUT
Output Ripple < 10mVP-P
Fast Minimum Switch On-Time: 30ns
Low Dropout Under All Conditions: 125mV at 1A
Safely Tolerates Inductor Saturation in Overload
Adjustable and Synchronizable: 200kHz to 3MHz
Peak Current Mode Operation
Accurate 1V Enable Pin Threshold
Internal Compensation
Output Soft-Start and Tracking
Small 18-Lead 3mm × 4mm QFN
AEC-Q100 Qualified for Automotive Applications

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Alternative Descriptions

Demo Board, Syn Step Down Silent Swchr Rohs Compliant: Yes |Analog Devices, Inc. DC2019B | Newark Electronics
DEMO BOARD, SYN STEP DOWN SILENT SWCHR | element14
LT8614 DC to DC Converter and Switching Regulator Chip 4.85VDC to 5.15VDC Output Demonstration Circuit Automotive | Richardson RFPD

DC2019B Development Boards & Evaluation Kits by Linear Technology

DEMO BOARD SYNC BUCK REGU

Education Maker & Hobbyist Electronics>Development Boards & Evaluation Kits>Power Management Development Kits
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
Demonstration circuit 2019B is a 42V, 4A micropower synchronous step-down Silent Switcher™ featuring the LT®8614. The demo board is designed for 5V output from a 5.8V to 42V input. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies. The LT8614 is a compact, ultralow emission, high efficiency and high speed synchronous monolithic step-down switching regulator. The integrated power switches and inclusion of all necessary circuitry reduce the components count and solution size. Special Silent Switcher architecture minimizes EMI/EMC emissions. Ultralow 2.5µA quiescent current in Burst Mode® operation achieves high efficiency at very light loads. Fast minimum on-time of 30ns enables high VIN to low VOUT conversion at high frequency. The LT8614 switching frequency can be programmed either via oscillator resistor or external clock over a 200kHz to 3MHz range. The SYNC pin on the demo board is grounded by default for low ripple Burst Mode operation. To synchronize to an external clock, move JP1 to SYNC and apply the external clock to the SYNC turret. Once JP1 is on SYNC position, a DC voltage of higher than 3V can be applied to the SYNC turret for pulse-skipping operation. Figure 1 shows the efficiency of the circuit at 12V input in Burst Mode operation (input from VIN turret pin). Figure 2 shows the LT8614 temperature rising on DC2019B demo board under different load conditions. The rated maximum load current is 4A, while derating is necessary for certain VIN and thermal conditions. The demo board has an EMI filter installed. The EMI performance of the board (with EMI filter) is shown in Figure 3. The red line in Figure 3 is CISPR25 Class 5 peak limit. The figure shows that the circuit passes the test with a wide margin. To achieve EMI/EMC performance as shown in Figure 3, the input EMI filter is required and the input voltage should be applied at VEMI turret pin. The LT8614 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo manual for demo circuit 2019B. The LT8614 is assembled in a 3mm × 4mm plastic QFN package with exposed pads for low thermal resistance. Proper board layout is essential for both low EMI operation and maximum thermal performance. See the data sheet sections, “Low EMI PCB Layout” and “High Temperature Considerations.”

Features

Specifications

Silicon Manufacturer Linear Technology
Silicon Core Number LT8614
Kit Application Type Power Management - Voltage Regulator
Application Sub Type Synchronous Buck Regulator
Kit Contents Demo Board LT8614
Product Range -
Automotive Qualification Standard -
SVHC No SVHC (15-Jan-2018)
Features Synchronous Step-Down Silent Switcher 2MHz Switching 91.3% Efficiency 2A/5V O/P 5.8-42V Supply

Frequently Asked Questions

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Additional datasheets, footprints and schematics for DC2019B are listed on our Part Details page. You can also find images and similar parts to DC2019B on this page.

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What category does DC2019B fall under?

The DC2019B is listed under Internal Power Switch Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to DC2019B when available in the Internal Power Switch Buck Regulators range under the specifications section at the bottom of the details page.

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Is the DC2019B RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

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