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reference designLTC3315B

Analog Devices LTC3315B

Dual 5V, 2A Synchronous Step-Down DC/DCs in 2mm × 2mm LQFN

Overview

TopologyBuck Converter
Input voltage5 V
Switching frequency10000 kHz
Output 12.5 V / 2 A
Output 23.3 V / 2 A

Description

The LTC®3315B features dual 2A monolithic synchronous step-down converters operating from a 2.25V to 5.5V input supply in one package for space-constrained applications with demanding performance requirements. Using constant frequency, peak current mode control at switching frequencies up to 10MHz with a minimum ontime as low as 25ns, both bucks achieve high efficiency and fast transient response in a very small application footprint.

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 10MHz
  • VIN Range: 2.25V to 5.5V
  • VOUT Range: 0.5V to VIN
  • VOUT Accuracy: }1%
  • Low Ripple Burst ModeR 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
  • AEC-Q100 Qualified for Automotive Applications

Typical applications

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

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)
ISAT(A)
RDC(mΩ)
SamplesAvailability & Sample
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744040240047
SPECWE-LQS SMT Power Inductor, 0.47 µH, 2.6 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LQS SMT Power Inductor
Inductance0.47 µH
Rated Current2.6 A
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Self Resonant Frequency231 MHz
Saturation Current5 A
DC Resistance32 mΩ
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74479276147
SPECWE-PMCI Power Molded Chip Inductor, 0.47 µH, 5.4 A
Simu­lation
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
Inductance0.47 µH
Rated Current5.4 A
Saturation Current 12.95 A
Saturation Current 26.3 A
DC Resistance30 mΩ
Self Resonant Frequency165 MHz
Saturation Current4.2 A
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