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Analog Devices LT7182S | Demoboard DC2836A
Dual Channel 6A, 20V,PolyPhase Step-Down Silent Switcher with Digital Power System Management
Overview
| Topology | Buck Converter |
| Input voltage | 4-20 V |
| Switching frequency | 925-1075 kHz |
| Output 1 | 3.3 V / 9 A |
| Output 2 | 1.2 V / 9 A |
Description
Demonstration Circuit 2836A is a dual-output PolyPhase® DC/DC synchronous step-down regulator with 4V to 20V input range featuring LT7182S. Each output can supply 6A continuous/9A maximum transient load current. LT7182S is a dual 6A monolithic step-down regulator utilizing second-generation Silent Switcher® technology to minimize EMI and reduce PCB layout sensitivity. It also integrates digital power system management function allowing for programmability and telemetry with a PMBus/I2C compliant serial interface. Please see LT7182S data sheet for more detailed information.The demonstration circuit 2836A runs at 1MHz to minimize solution size. The peak efficiency at 12V input is 83.2% for 1.2V rail and 91.1% for 3.3V rail. The IC temperature rise is 70°C when both channels run at full load, 6A each, at 1MHz.The demo board has EMI filters installed for both channels. The conducted and radiated EMI performances of the board (with EMI filters) are shown in Figure 2 of the demo manual. The red lines in Figure 2 are CISPR25 CLASS 5 limit.DC2836A powers up to default settings and produces 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 power system management features of the part, download the GUI software LTpowerPlay® onto your PC and use ADI’s 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.
Features
- Silent Switcher®2 Architecture: Enables Compact, Efficient, low EMI Solution
- PMBus/I2C Serial InterfaceTelemetry Read Back Includes VOUT, IOUT, VIN, Die Temperature, FaultsProgrammable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, UV/OV, Phase, Frequency (Up to 4MHz), Loop CompensationIntegrated EEPROM with Fault Event Log
- Key Parameters May Be Set by Configuration Resistors for Operation without Programming
- ±0.25% Output Voltage Accuracy Over Temperature for 0.6V to 1.375V
- PolyPhase Load Sharing for Up to Eight Phases
- Wide VIN Range: Down to 2.9V, or 1.5V with EXTVCC
- Up to 95% Efficiency at 1MHz, 12VIN to 3.3VOUT
- VOUT Range 0.4V to 5.5V (Up to 0.85 - VIN)
- Differential Remote VOUT Sense
- External Frequency Synchronization
- 40-lead (5mm × 7mm) LQFN Package
Typical applications
- Communications, Storage,
- Industrial Systems Data Center
- Solid State Drive Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR(mA) | Z @ 1 GHz(Ω) | H(mm) | Type | Pins | Mount | L(mm) | Working Voltage(V (AC)) | Operating Temperature | SamplesAvailability & Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-LHMI SMT Power Inductor, 0.47 µH, 8.7 A | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance0.47 µH | Performance Rated Current8.7 A | Saturation Current @ 10%10.4 A | Saturation Current @ 30%19.6 A | DC Resistance14 mΩ | Self Resonant Frequency122 MHz | – | – | – | – | – | Height1.8 mm | – | Pins2 | MountSMT | Length4.45 mm | – | Operating Temperature -40 °C up to +125 °C | –Check availability | |||
 | SPECWE-MPSB EMI Multilayer Power Suppression Bead, –, – | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MPSB EMI Multilayer Power Suppression Bead | – | – | – | – | DC Resistance6 mΩ | – | Impedance @ 100 MHz100 Ω | Maximum Impedance160 Ω | Maximum Impedance1100 MHz | Rated Current8000 mA | Impedance @ 1 GHz150 Ω | Height2.3 mm | TypeHigh Current | – | MountSMT | Length4.5 mm | – | Operating Temperature -55 °C up to +125 °C | –Check availability | |||
 | SPECWR-PHD Jumper, –, – | Simulation– | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | – | – | Rated Current3000 mA | – | – | – | Pins2 | – | – | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C | –Check availability | ||
 | SPECWR-PHD Pin Header, –, – | Simulation– | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | – | – | Rated Current2000 mA | – | – | TypeStraight | Pins3 | MountTHT | Length6 mm | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C | –Check availability |
| Expected Availability | Opening inventory | Quantity |
|---|---|---|
| Current Availability | – | – |