DC2169A Internal Power Switch Buck Regulators by Analog Devices

Internal Power Switch Buck Regulators
Status: Production
Series: LT8616
RoHS: Compliant
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The LT8616 is a high efficiency, high speed, dual synchronous monolithic step-down switching regulator that consumes only 6.5μA of quiescent current with both channels enabled. Both channels contain all switches and necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while minimizing output ripple. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The enable pins have accurate 1V thresholds and can be used to program undervoltage lockout. Capacitors on the TR/SS pins programs the output voltage ramp rate during startup while the PG pins signal when each output is within 10% of the programmed output voltage. The LT8616 is available in a TSSOP package for high reliability.

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Features

Wide Input Voltage Range: 3.4V to 42V
2.5A and 1.5A Buck Regulators with Separate Inputs
Fast Minimum Switch On-Time: 35ns
Ultralow Quiescent Current Burst Mode® Operation:
6.5μA IQ Regulating 12VIN to 5VOUT and 3.3VOUT
Output Ripple < 15mV
180° Out of Phase Switching
Adjustable: 200kHz to 3MHz
Synchronizable: 250kHz to 3MHz
Accurate 1V Enable Pin Thresholds
Internal Compensation
Output Soft-Start and Tracking
TSSOP Package: Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin Is Left Floating
Thermally Enhanced 28-Lead TSSOP and 3mm × 6mm QFN Packages

Last 6 months Inventory & Pricing History

Alternative Descriptions

DEMO BOARD, SYN STEP DOWN REGULATOR | element14
LT8616 DC to DC Converter and Switching Regulator Chip 3.21V to 3.37V/4.88V to 5.15V Output Demonstration Circuit | Richardson RFPD

DC2169A Development Boards & Evaluation Kits by Linear Technology

DEMO BOARD SYNC BUCK REGULATOR

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 2169A is a dual monolithic step-down DC/DC switching regulator featuring the LT®8616. The LT8616 is a high efficiency, high speed, dual synchronous monolithic step-down switching regulator that consumes only 6.5μA of quiescent current with both channels enabled. The demo circuit is designed for 5V, 1.5A and 3.3V, 2.5A outputs. Both channels contain all switches and necessary circuitry to minimize the external components and solution size. Fast minimum ON time of 35ns enables high VIN to low VOUT conversion at high switching frequency. Independent input voltage, feedback, soft-start and power good pins for each channel simplify complex power supply tracking/sequencing requirements. The inputs of the two channels are connected on the demo board by default. They can also be separated by removing the 0Ω resistor (R13) from the board. Each output can be independently disabled using its own EN/UV pin, while VIN1 must be connected to 3.4V or above even if only channel 2 is in use. The demo board has an EMI filter installed between VIN2 and VEMI. To use the EMI filter, the inputs should be tied to VEMI. The switching frequency of both channels can be programmed either via an oscillator resistor or a common external clock up to 3MHz.The SYNC pin on the demo board is grounded by default for Burst Mode® operation. Performance Summary To synchronize to an external clock, move JP1 to SYNC/ MODE and apply the external clock to the SYNC/MODE turret. The RT resistor (R5) should be chosen to set the LT8616 internal switching frequency at least 20% below the lowest synchronization input. Low ripple Burst Mode operation increases the efficiency at the light load while keeping the output ripple low. Figure 1 and Figure 2 show the demo board efficiency for each channel at 12V input voltage in Burst Mode operation. Figure 3 shows the temperature rising on DC2169A demo board with different input voltages under full load conditions on both channels. The LT8616 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 DC2169A. The LT8616 is assembled in a 28-lead plastic TSSOP package. Proper board layout is essential for both low EMI operation and maximum thermal performance. See the data sheet sections for details.

Features

Specifications

Silicon Manufacturer Linear Technology
Silicon Core Number LT8616
Kit Application Type Power Management - Voltage Regulator
Application Sub Type Synchronous Buck Regulator
Kit Contents Demo Board LT8616
Product Range -
Automotive Qualification Standard -
SVHC No SVHC (15-Jan-2018)
Features 1.5A/5V & 2.5A/3.3V Dual Channel Regulator 2.05MHz Switching Fast On Time 5.5/4.1V to 42V Supply

Frequently Asked Questions

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The DC2169A is listed under Internal Power Switch Buck Regulators.

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Is the DC2169A RoHS compliant?

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

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