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reference designLTC3114-1

Analog Devices LTC3114-1

40V, 1A Synchronous Buck-Boost DC/DC Converter with Programmable Output Current

Overview

TopologyBuck-Boost Converter
Input voltage2.2-40 V
Switching frequency1200 kHz
Output 140 V / 1 A
IC revisionA

Description

The LTC®3114-1 is a versatile, wide operating voltage rangesynchronous monolithic buck-boost DC/DC converter withprogrammable average output current. The LTC3114-1’sproprietary buck-boost PWM control circuitry delivers lownoise operation across the entire operating voltage range.Current mode control ensures exceptional line and loadtransient responses.Synchronous, internal MOSFET switches and pin selectableBurst Mode operation maintain high efficiency acrossthe entire range of load current. Average output currentis programmed with a standard resistor and provides thebasis for wide input range, high efficiency charging systemsor constant current, high efficiency LED drive. Regulatorturn-on is programmable through the accurate RUN pin.Quiescent current is just 3μA in shutdown. Overtemperatureprotection, short-circuit protection and soft-start areintegrated. The LTC3114-1 is offered in 16-lead 3mm ×5mm × 0.75mm DFN and 16 lead TSSOP (FE) packages.

Features

  • Regulates VOUT Above, Below or Equal to VIN
  • Single Inductor
  • Wide VIN Range: 2.2V to 40V
  • Wide VOUT Range: 2.7V to 40V
  • 1A Output Current in Buck Mode
  • 0.5A Output Current, VIN = 3.6V, VOUT = 5V
  • Programmable Average Output Current
  • Up to 96% Efficiency
  • Burst Mode® Operation, 30μA No-Load IQ
  • Current Mode Control
  • 1.2MHz Ultralow Noise PWM
  • Accurate RUN Pin Threshold
  • Thermally Enhanced, 16-lead 3mm × 5mm DFNand TSSOP Packages

Typical applications

  • 12V/24V Solar Panel Battery Charging Systems
  • 24V/28V Industrial Power Supply
  • 12V Lead-Acid to 12V Regulator
  • High Power LED Driver
  • Automotive Power Systems

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT(A)
fres(MHz)
Mount
IRP,40K(A)
RDC max.(mΩ)
Size
Version
SamplesAvailability & Sample
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7447789004
SPECWE-PD SMT Power Inductor, 4.7 µH, –
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance4.7 µH
–
–
Self Resonant Frequency45 MHz
MountSMT 
Performance Rated Current4.2 A
DC Resistance35 mΩ
Size7332 
VersionRobust 
–Check availability
7440650068
SPECWE-TPC SMT Tiny Power Inductor, 6.8 µH, 4.2 A
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TPC SMT Tiny Power Inductor
Inductance6.8 µH
Rated Current4.2 A
Saturation Current3.6 A
Self Resonant Frequency30 MHz
MountSMT 
–
DC Resistance33 mΩ
Size1028 
VersionSMT 
–Check availability
744066150
SPECWE-TPC SMT Tiny Power Inductor, 15 µH, 3 A
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TPC SMT Tiny Power Inductor
Inductance15 µH
Rated Current3 A
Saturation Current3.25 A
Self Resonant Frequency16 MHz
MountSMT 
–
DC Resistance50 mΩ
Size1038 
VersionSMT 
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744771133
SPECWE-PD SMT Power Inductor, 33 µH, 2.8 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance33 µH
Rated Current2.8 A
Saturation Current3 A
Self Resonant Frequency11 MHz
MountSMT 
Performance Rated Current4.6 A
DC Resistance57 mΩ
Size1260 
VersionStandard 
–Check availability