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Product details

Parameters

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 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 600 Switching frequency (Max) (kHz) 1250 Iq (Typ) (mA) 1.3 Features Enable Duty cycle (Max) (%) 85 Operating temperature range (C) -40 to 125 Type Converter Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Boost converters (integrated switch)

Features

  • 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
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Description

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

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
$75.00
Description

Simple Switcher® 1.35A Boost Regulator

Features
  • 1.9A, 0.2Ω , internal switch (typical)
  • Operating voltage as low as 2.2V
  • 600kHz/1.25MHz adjustable frequency operation
  • Switchers Made Simple® Software
  • 8-Lead MSOP package

 

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

Support & training

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Videos

Power Tips: Layout for a Boost Power Stage

This video shows a simplified schematic and PCB layout for a boost converter

Posted: 21-Jan-2016
Duration: 04:31

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