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Boost converters (integrated switch)

LM2698

ACTIVE

SIMPLE SWITCHER® 1.35A Boost Regulator

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Data sheet

LM2698

ACTIVE
Data sheet Order now

Product details

Topology Boost, Flyback, Forward, SEPIC Vin (min) (V) 2.2 Vin (max) (V) 12 Vout (min) (V) 2.2 Vout (max) (V) 17 Switch current limit (typ) (A) 1.35 Type Converter Regulated outputs (#) 1 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1250 Iq (typ) (mA) 1.3 Features Enable, Nonsynchronous rectification Duty cycle (max) (%) 85 Operating temperature range (°C) -40 to 125 Rating Catalog Thermal resistance θJA (°C/W) 142.5
Topology Boost, Flyback, Forward, SEPIC Vin (min) (V) 2.2 Vin (max) (V) 12 Vout (min) (V) 2.2 Vout (max) (V) 17 Switch current limit (typ) (A) 1.35 Type Converter Regulated outputs (#) 1 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1250 Iq (typ) (mA) 1.3 Features Enable, Nonsynchronous rectification Duty cycle (max) (%) 85 Operating temperature range (°C) -40 to 125 Rating Catalog Thermal resistance θJA (°C/W) 142.5
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • 1.9-A, 0.2-Ω Internal Switch (Typical)
  • Operating Voltage as Low as 2.2 V
  • 600 kHz to 1.25 MHz Adjustable Frequency Operation
  • Switchers Made Simple® Software
  • 8-Pin VSSOP Package
  • 1.9-A, 0.2-Ω Internal Switch (Typical)
  • Operating Voltage as Low as 2.2 V
  • 600 kHz to 1.25 MHz Adjustable Frequency Operation
  • Switchers Made Simple® Software
  • 8-Pin VSSOP Package

The LM2698 device is a general purpose PWM boost converter. The 1.9-A, 18-V, 0.2-Ω internal switch enables the LM2698 to provide efficient power conversion to outputs ranging from 2.2 V to 17 V. It can operate with input voltages as low as 2.2 V and as high as 12 V. Current-mode architecture provides superior line and load regulation and simple frequency compensation over the device’s 2.2 V to 12 V input voltage range. The LM2698 sets the standard in power density and is capable of supplying 12 V at 400 mA from a 5-V input. The LM2698 can also be used in flyback or SEPIC topologies.

The LM2698 SIMPLE SWITCHER® features a pin selectable switching frequency of either 600 kHz or 1.25 MHz. This promotes flexibility in component selection and filtering techniques. A shutdown pin is available to suspend the device and decrease the quiescent current to 5 µA. An external compensation pin gives the user flexibility in setting frequency compensation, which makes possible the use of small, low-ESR ceramic capacitors at the output. Switchers Made Simple® software is available to ensure a quick, easy, and assured design. The LM2698 is available in a low-profile, 8-pin VSSOP (DGK) package.

The LM2698 device is a general purpose PWM boost converter. The 1.9-A, 18-V, 0.2-Ω internal switch enables the LM2698 to provide efficient power conversion to outputs ranging from 2.2 V to 17 V. It can operate with input voltages as low as 2.2 V and as high as 12 V. Current-mode architecture provides superior line and load regulation and simple frequency compensation over the device’s 2.2 V to 12 V input voltage range. The LM2698 sets the standard in power density and is capable of supplying 12 V at 400 mA from a 5-V input. The LM2698 can also be used in flyback or SEPIC topologies.

The LM2698 SIMPLE SWITCHER® features a pin selectable switching frequency of either 600 kHz or 1.25 MHz. This promotes flexibility in component selection and filtering techniques. A shutdown pin is available to suspend the device and decrease the quiescent current to 5 µA. An external compensation pin gives the user flexibility in setting frequency compensation, which makes possible the use of small, low-ESR ceramic capacitors at the output. Switchers Made Simple® software is available to ensure a quick, easy, and assured design. The LM2698 is available in a low-profile, 8-pin VSSOP (DGK) package.
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Technical documentation

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Type Title Date
* Data sheet LM2698 SIMPLE SWITCHER® 1.35-A Boost Regulator datasheet (Rev. F) PDF | HTML 15 Sep 2016
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mar 2024
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide AN-1202 LM2698 Demoboard (Rev. C) 24 Apr 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

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