DC249A-A: Demo Board for the LTC1682 Doubler Charge Pumps with Low Noise Linear Regulator.

DC249A-B: Demo Board for the LTC1682 Doubler Charge Pumps with Low Noise Linear Regulator.

Demonstration circuit 2501A features the LTM®8002, a 40V, 2.5A step-down µModule® regulator. This demo circuit is configured to deliver a 5.0V output from an input voltage between 6.0V to 40V at a switching frequency of 1MHz. The wide input range of the LTM8002 allows a variety of input sources such as automotive batteries and industrial supplies. Under light load conditions, the available Burst Mode® operation supports high efficiency with low output ripple. The demo board has an EMI filter installed. The EMI performance of the board is shown in Figure 6 and Figure 7. The LTM8002 data sheet gives complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit 2501A.

The LT8630 is a current mode PWM step-down DC/DC converter with internal synchronous switches that provide current for output loads up to 0.6A. The wide input range of 3V to 100V makes the LT8630 suitable for regulating power from a wide variety of sources, including automotive and industrial systems and 36V to 72V telecom supplies. Variable frequency boundary mode switching maximizes efficiency across a wide range of input voltages. Low ripple Burst Mode operation enables high efficiency operation down to very low output currents while keeping the output ripple below 5mV. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, while also providing output tracking. A power good flag signals when the output voltage is within ?7.5% of the regulated output. Undervoltage lockout can be programmed using the EN/UV pin. Shutdown mode reduces the total quiescent current to < 5?A. The LT8630 is available in a 20-lead TSSOP package with exposed pad for low thermal resistance and high voltage lead spacing.APPLICATIONS Automotive Supplies Telecom Supplies Distributed Supply Regulation

DC250A-A: Demo Board for the LTC1503 High Efficiency Inductorless Step-Down DC/DC Converter.

The DC2518A is a demonstration system for the LTC2975 Power System Manager that interfaces to various regulators. The board contains all the circuitry needed to use the LTC2975 in a power system and control four power supplies. The four power supplies include linear and switching regulators for the purpose of demonstrating a variety of methods to sense voltage and current. The demo board provides a sophisticated, digitally programmable 4-channel power supply system.

Demonstration circuit 2529A is a dual output synchronous buck converter featuring the LTC7810ELXE in a 48-lead eLQFP package. Key features of this board include: an optional on-board NMOS LDO for DRVCC; jumper for spread-spectrum option; optional resistors for single output dual phase operation; a mode selector that allows the converter to run in CCM, pulse-skipping, adjustable burst clamp or default Burst Mode® operation; SYNC turret for Poly-Phase® operation. The input voltage range of this demo board is from 16V to 130V and it uses a sense resistor for overcurrent protection. The LTC7810 data sheet gives a complete description of the part, operation and application information and must be read in conjunction with this demo manual for DC2529A.

Demonstration circuit 2552A is a dual-output, high efficiency, high density, µModule regulator with 4.5V to 16V input range. Each output can supply 25A maximum load current. The demo board has a LTM4678 µModule regulator, which is a dual 25A or single 50A step-down regulator with digital power system management. Please see LTM4678 data sheet for more detailed information. DC2552A powers up to default settings and produce power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay® onto your PC and use Analog Devices’ I2C/SMBus/PMBus dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.

Demonstration circuit 2569A is ultrathin step-up μModule regulator featuring the LTM4661. The DC2569A operates over 1.8V to 5.5V input and it generates 12V, 1A output from 5V input. Also, the LTM4661 has precision voltage reference, which can generate output voltage with 3% tolerance over the full operating conditions. The 1MHz switching frequency operation results in small and efficient circuit. The converter operates with only one phase in burst mode and achieves over 90% efficiency with 100mA load. The demonstration circuit can be easily modified to generate different output voltages.

Demonstration circuit 2584A is an IEEE 802.3bt (Draft 2.1) compliant Power over Ethernet (PoE) Powered Device (PD). It features the LT4295 PD interface and switching regulator controller and the LT4321 PoE ideal diode bridge controller.