LM2731

ACTIVE

0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.7 Vin (max) (V) 14 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1600 Features Enable, Nonsynchronous rectification Vout (min) (V) 1.23 Vout (max) (V) 22 Iq (typ) (µA) 2000 Duty cycle (max) (%) 93 Switch current limit (typ) (A) 1.5
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.7 Vin (max) (V) 14 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1600 Features Enable, Nonsynchronous rectification Vout (min) (V) 1.23 Vout (max) (V) 22 Iq (typ) (µA) 2000 Duty cycle (max) (%) 93 Switch current limit (typ) (A) 1.5
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • 22-V DMOS FET Switch
  • 1.6-MHz (X Option), 0.6-MHz (Y Option)
    Switching Frequency
  • Low RDS(ON) DMOS FET
  • Switch Current Up to 1.8 A
  • Wide Input Voltage Range (2.7 V to 14 V)
  • Low Shutdown Current (<1 µA)
  • 5-Lead SOT-23 Package
  • Uses Tiny Capacitors and Inductors
  • Cycle-by-Cycle Current Limiting
  • Internally Compensated
  • 22-V DMOS FET Switch
  • 1.6-MHz (X Option), 0.6-MHz (Y Option)
    Switching Frequency
  • Low RDS(ON) DMOS FET
  • Switch Current Up to 1.8 A
  • Wide Input Voltage Range (2.7 V to 14 V)
  • Low Shutdown Current (<1 µA)
  • 5-Lead SOT-23 Package
  • Uses Tiny Capacitors and Inductors
  • Cycle-by-Cycle Current Limiting
  • Internally Compensated

The LM2731 switching regulators are current-mode boost converters operating at fixed frequencies of 1.6 MHz (X option) and 600 kHz (Y option).

The use of SOT-23 package, made possible by the minimal power loss of the internal 1.8-A switch, and use of small inductors and capacitors result in the highest power density of the industry. The 22-V internal switch makes these solutions perfect for boosting to voltages up to 20 V.

These parts have a logic-level shutdown pin that can reduce quiescent current and extend battery life.

Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count.

The LM2731 switching regulators are current-mode boost converters operating at fixed frequencies of 1.6 MHz (X option) and 600 kHz (Y option).

The use of SOT-23 package, made possible by the minimal power loss of the internal 1.8-A switch, and use of small inductors and capacitors result in the highest power density of the industry. The 22-V internal switch makes these solutions perfect for boosting to voltages up to 20 V.

These parts have a logic-level shutdown pin that can reduce quiescent current and extend battery life.

Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count.

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Technical documentation

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Type Title Date
* Data sheet LM2731 0.6/1.6-MHz Boost Converters With 22-V Internal FET Switch in SOT-23 datasheet (Rev. G) PDF | HTML 30 Sep 2015
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide AN-1280 LM2731/LM2733 Evaluation Board (Rev. B) 24 Apr 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM2731YEVAL — 0.6 1.6 MHz Boost Converters With 22V Internal FET Switch Evaluation Module

LM2731Y 0.6 MHz Boost Converter With 22 V Internal FET Switch

User guide: PDF
Not available on TI.com
Simulation model

LM2731X 1.6MHz Unencrypted PSPICE Transient Model Package (Rev. A)

SNVM668A.ZIP (40 KB) - PSpice Model
Simulation model

LM2731X Unencrypted PSpice Transient Model

SNVM883.ZIP (2 KB) - PSpice Model
Simulation model

LM2731Y 0.6MHz Unencrypted PSPICE Transient Model Package (Rev. A)

SNVM669A.ZIP (42 KB) - PSpice Model
Simulation model

LM2731Y Unencrypted PSpice Transient Model

SNVM882.ZIP (2 KB) - PSpice Model
Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 5 Ultra Librarian

Ordering & quality

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  • MSL rating/Peak reflow
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  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

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