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Analog Devices LTM8051EY | Demoboard DC2860A
Quad 40VIN Silent Switcher μModule Regulator with Configurable 1.2A Output Array
Overview
| Topology | Buck Converter |
| Input voltage | 7-40 V |
| Output 1 | 2.5 V / 1.2 A |
| Output 2 | 1.8 V / 1.2 A |
| Output 3 | 3.3 V / 1.2 A |
| Output 4 | 5 V / 1.2 A |
Description
Demonstration circuit 2860A is a quad step-down DC/DC switching converter featuring the LTM8051 silent switcher μModule® regulator. The demo board is designed to deliver quad 5V/1.2A, 3.3V/1.2A, 2.5V/1.2A and 1.8V/1.2A outputs from a 7V to 40V input. The Silent Switcher® architecture minimizes EMI while achieving high efficiency at frequencies up to 3MHz. The modes of operation (Burst Mode® operation or discontinuous mode/SYNC) are jumper selectable. Burst Mode operation improves efficiency at light loads.The LTM8051 is a fixed frequency PWM regulator with current mode control scheme. The switching frequency of channel 1 and channel 4 is set by an appropriate resistor (R11) from the RT14 pin to ground. The switching frequency of channel 2 and channel 3 is set by another appropriate resistor (R23) from the RT23 pin to ground. The RUN14 pin (RUN14 terminal) can be used to set the LTM8051 channel 1 and channel 4 in micro power shut-down mode, while the RUN23 pin (RUN23 terminal) can be used to set the channel 2 and channel 3 in shutdown mode. Output tracking and soft start pins (TRSS1/TRSS2/TRSS3/TRSS4) allow user control of output voltage ramp rate during startup. The power good output of each channel (PG1/PG2/PG3/PG4) will be low when that channel’s output voltage is outside of the ±7.5% regulation window.
Features
- Four Complete Step-Down Switching Power Supplies
- Low Noise Silent Switcher® Architecture
- CISPR22 Class B Compliant
- CISPR25 Class 5 Compliant
- Wide Input Voltage Range: 3V to 40V
- Wide Output Voltage Range: 0.8V to 8V
- Selectable Switching Frequency: 300kHz to 3MHz
- 1.2A Continuous Output Current per Channel at 12VIN, 3.3VOUT, TA = 85°C
- 1.5A Continuous Output Current per Channel at 12VIN, 3.3VOUT, TA = 60°C
- Multiphase or Multi-μModule Parallelable for Increased Output Current
- Compact Package (6.25mm × 11.25mm × 2.22mm) Surface Mount BGA
Typical applications
- ADI in 5G, Radar system, RadioVerse, Sensor interface
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(mm) | f(mm) | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Mount | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR(mA) | Z @ 1 GHz(Ω) | H(mm) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LHMI SMT Power Inductor, 4.45 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Length4.45 mm | – | Inductance0.22 µH | Performance Rated Current11.4 A | Saturation Current @ 10%10.8 A | Saturation Current @ 30%22.3 A | DC Resistance7.3 mΩ | Self Resonant Frequency195 MHz | MountSMT | – | – | – | – | – | Height1.8 mm | – | ||||
 | WE-MPSB EMI Multilayer Power Suppression Bead, 4.5 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MPSB EMI Multilayer Power Suppression Bead | Length4.5 mm | – | – | – | – | – | DC Resistance6 mΩ | – | MountSMT | Impedance @ 100 MHz100 Ω | Maximum Impedance160 Ω | Maximum Impedance1100 MHz | Rated Current8000 mA | Impedance @ 1 GHz150 Ω | Height2.3 mm | TypeHigh Current | ||||
 | WA-SNSR Self-Retaining Spacer, 6.4 mm, 4.8 mm | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SNSR Self-Retaining Spacer | Length6.4 mm | Drilling in Panel4.8 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – |