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reference designLTC3310

Analog Devices LTC3310

5V, 10A Synchronous Step-Down Silent Switcher 2 in 3mm × 3mm LQFN

Overview

TopologyBuck Converter
Input voltage2.25-4.5 V
Output 10.6 V / 30 A
IC revisionD

Description

The LTC®3310S is a very small, low noise, monolithic step-down DC/DC converter capable of providing up to 10A of output current from a 2.25V to 5.5V input supply. The device employs Silent Switcher 2 architecture with internal hot loop bypass capacitors to achieve both low EMI and high efficiency at switching frequencies as high as 5MHz. For systems with higher power requirements, multi-phasing parallel converters is readily implemented. The LTC3310S uses a constant-frequency, peak current mode control architecture for fast transient response. A 500mV reference allows for low voltage outputs. 100% duty cycle operation delivers low drop out. Other features include a power good signal when the output is in regulation, precision enable threshold, output overvoltage protection, thermal shutdown, a temperature monitor, clock synchronization, mode selection and output short circuit protection.

Features

  • Silent Switcher®2 Architecture: Ultralow EMI Emissions (LTC3310S and LTC3310S-1)
  • 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
  • 35ns Minimum On-Time
  • Programmable Frequency to 5MHz
  • Shutdown Current: 1μA
  • Precision 400mV Enable Threshold
  • Output Soft-Start with Voltage Tracking
  • Power Good Output
  • Die Temperature Monitor
  • Configurable for Paralleling Power Stages
  • Thermally-Enhanced 3mm . 3mm LQFN Package
  • AEC-Q100 Qualified for Automotive Applications

Typical applications

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

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Mount
SamplesAvailability & Sample
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744373240010
SPECWE-LHMI SMT Power Inductor, 0.1 µH, 16.5 A
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance0.1 µH
Performance Rated Current16.5 A
Saturation Current @ 10%20.9 A
Saturation Current @ 30%37.6 A
DC Resistance4 mΩ
Self Resonant Frequency323 MHz
MountSMT 
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