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Analog Devices LTC3311-1 | Demoboard DC3113A
3.3V to 1V at 12.5A, 2MHz Automotive Low EMI Buck Regulator
Overview
| Topology | Buck Converter |
| Input voltage | 3-3.6 V |
| Switching frequency | 1800-2200 kHz |
| Output 1 | 1 V / 12.5 A |
Description
Demonstration Circuit 3113A features the LTC®3311-1,fixed 1V, 12.5A synchronous step-down Silent Switcher® operating as a 2MHz, 3V to 3.6V input, 1V/12.5A output buck regulator. The LTC3311-1 supports fixed 1V output voltage with operating frequencies from 500kHz up to 5MHz. The LTC3311-1 is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The LTC3311-1 has Active Voltage Positioning (AVP) where the output voltage is dependent on load current. At light load, the output voltage is regulated above the nominal value. At full load, the output voltage is regulated below the nominal value. The DC load regulation is adjusted to improve transient performance and reduce required output capacitance.DC3113A is set up to run in forced continuous mode witha 2MHz switching frequency but can be configured to runat different switching frequencies, or in pulse-skippingmode. The LTC3311-1 oscillator can also synchronizeto an external clock using MODE/SYNC turret, with theDC3113A default setup. Figure 7 shows the efficiency andpower loss of the DC3113A with a 3.3V input in bothoperation modes.
Features
- Pin Compatible with LTC3310/LTC3310S and LTC3311S
- Silent Switcher® Architecture
- Ultralow EMI Emissions
- High Efficiency—4.5mΩ NMOS and 16mΩ PMOS
- Wide Bandwidth, Fast Transient Response
- Safely Tolerates Inductor Saturation in Overload
- VIN Range: 2.25V to 5.5V
- VOUT Range: 0.5V to VIN
- VOUT Accuracy: ±1% with Remote Sense
- Peak Current Mode Control
- Minimum On-Time: 35ns
- Programmable Frequency to 5MHz
- Precision 400mV Enable Threshold, 1μA in Shutdown
- Output Soft-Start with Voltage Tracking
- Power Good Output
- Die Temperature Monitor
- Configurable for Paralleling Power Stages in Forced Continuous Mode
- Thermally-Enhanced 3mm × 3mm LQFN Package
- AEC-Q100 Qualified for Automotive Applications
Typical applications
- Automotive/Industrial/Communications
- Servers, Telecom Power Supplies, Distributed DC Power Systems (POL)
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR (mA) | Z @ 1 GHz (Ω) | H (mm) | Type | Pins (Value) (pcs) | Rows | Gender | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 74279226101 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-MPSB EMI Multilayer Power Suppression Bead | 100 | 160 | 1100 MHz | 8000 | 150 | 2.3 | High Current | – | – | – | – | ||
 | 60800213421 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm Jumper with Test Point | – | – | – | 3000 | – | – | – | 2 | – | Jumper | Bag | |
 | 62000311121 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm THT Pin Header | – | – | – | 2000 | – | – | Straight | 3 | Single | Pin Header | Bag |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 74279226101 | SPEC | |
| 60800213421 | SPEC | – |
| 62000311121 | SPEC | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR (mA) | Z @ 1 GHz (Ω) | H (mm) | Type | Pins (Value) (pcs) | Rows | Gender | Packaging | Samples |
|---|