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Analog Devices LTC3311 | Demoboard DC3056A

3.3V to 1.2V at 12.5A, 2MHz Automotive Low EMI Buck Regulator in a 1.22cm2 Solution

Overview

TopologyBuck Converter
Input voltage3-5.5 V
Switching frequency1800-2200 kHz
Output 11.22 V / 12.5 A

Description

Demonstration circuit 3056A features the LTC®3311,12.5A, low voltage synchronous step-down Silent Switcher® operating as a 2MHz, 2.25V–5.5V input,1.2V 12.5A output buck regulator. The LTC3311 supports output voltages from 0.5V to VIN with operating frequencies from 500kHz up to 5MHz. The LTC3311 is a compact,ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The Silent Switcher technology optimizes fast-current loops and makes it easier to minimize EMI/EMC emissions. Fast minimum on-time of 35ns enables high VIN to low VOUT conversion at high frequency.

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

  • Industrial, Distributed DC Power Systems (POL)
  • Communications, Servers
  • Automotive
  • Telecom Power Supplies, FPGA, ASIC, µP Core Supplies

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR
(mA)
Z @ 1 GHz
(Ω)
H
(mm)
TypePins (Value)
(pcs)
RowsGenderPackaging Samples
74279226101SPEC
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
60800213421SPEC
3 files Active i| Production is active. Expected lifetime: >10 years.WR-PHD 2.00 mm Jumper with Test Point 3000 2 Jumper Bag
62000311121SPEC
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
74279226101SPEC
60800213421SPEC
62000311121SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR
(mA)
Z @ 1 GHz
(Ω)
H
(mm)
TypePins (Value)
(pcs)
RowsGenderPackaging Samples