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reference designLTC3315A

Analog Devices LTC3315A

LTC3315A

Overview

TopologyOther Topology
Input voltage2.25-5.5 V
Switching frequency3000 kHz

Description

The LTC®3315A features dual 2A monolithic synchronousstep-down converters operating from a 2.25V to5.5V input supply in one package for space-constrainedapplications with demanding performance requirements.Using constant frequency, peak current mode control atswitching frequencies up to 3MHz with a minimum ontimeas low as 25ns, both bucks achieve high efficiencyand fast transient response in a very small applicationfootprint.

Features

  • Dual Outputs Each with 2A Output Current
  • High Efficiency: 19mΩ NMOS and 75mΩ PMOS
  • Wide Bandwidth, Fast Transient Response
  • Switching Frequency Synchronizable Up to 3MHz
  • VIN Range: 2.25V to 5.5V
  • VOUT Range: 0.5V to VIN
  • VOUT Accuracy: ±1%
  • Low Ripple Burst Mode® Operation
  • Peak Current Mode Control
  • Minimum On-Time: 25ns
  • Safely Tolerates Inductor Saturation in Overload
  • Shutdown Current: 1.2μA
  • Precision 400mV Enable Thresholds
  • Internal Soft-Start and Compensation
  • Power Good Output
  • Low Profile, Thermally Enhanced 12-Lead 2mm × 2mm × 0.74mm LQFN Package

Typical applications

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

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT1(A)
ISAT2(A)
RDC max.(mΩ)
fres(MHz)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
VOP(V)
Mount
SamplesAvailability & Sample
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74479290125
SPECWE-PMCI Power Molded Chip Inductor, 0.25 µH, 9.05 A
Simu­lation
Availability
–
Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
Inductance0.25 µH
Rated Current9.05 A
Saturation Current 18.5 A
Saturation Current 215.65 A
DC Resistance31 mΩ
Self Resonant Frequency150 MHz
Performance Rated Current9.05 A
Saturation Current @ 30%15.65 A
DC Resistance26 mΩ
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MountSMT 
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74438336015
SPECWE-MAPI SMT Power Inductor, 1.5 µH, 3.7 A
Simu­lation
Availability
–
Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1.5 µH
Rated Current3.7 A
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DC Resistance39 mΩ
Self Resonant Frequency51 MHz
Performance Rated Current5.35 A
Saturation Current @ 30%5.85 A
DC Resistance33 mΩ
Operating Voltage80 V
MountSMT 
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