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6V, 2A, 1MHz, CMCOT Synchronous Step-Down Converter

RT8097A

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The RT8097A is a simple, easy-to-use, 2A synchronous step-down DC-DC converter with an input supply voltage range of 2.7V to 6V. The device build-in an accurate 0.6V (typ.) reference voltage and integrates low RDS(ON) power MOSFETs to achieve high efficiency in a SOT-23-5 and SOT-23-6 packages.

The RT8097A adopts Current Mode Constant On-Time (CMCOT) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT8097A operates in automatic PSM that maintains high efficiency during light load operation.

The RT8097A senses low-side FETs current for a robust over-current protection. It features cycle-by-cycle current limit protection and prevent the device from the catastrophic damage in output short circuit, over current or inductor saturation. An internally adjustable soft-start function prevents inrush current during start-up. The device also includes input under-voltage lockout, output under-voltage protection, and over-temperature protection (thermal shutdown) to provide safe and smooth operation in all operating conditions. The RT8097A is offered in a SOT-23-5 and SOT-23-6 packages.

Applications

  • STB, Cable Modem, & xDSL Platforms
  • LCD TV Power Supply & Metering Platforms
  • General Purpose Point of Load (POL)
  • Internet of Things
Key Spec.
RT8097A
Status Active
Vin (min) (V) 2.7
Vin (max) (V) 6
Number of Outputs 1
Vout (min) (V) 0.6
Vout (max) (V) 3.4
Output Adj. Method Resistor
Iout (max) (A) 2
Current Limit (typ) (A) 3.1
Freq (typ) (kHz) 1000
Ext Sync No
Ron_HS (typ) (mOhm) 100
Ron_LS (typ) (mOhm) 70
Iq (typ) (mA) 0.022
Features OCP;OVP;PSM;UVP
Package Type SOT-25;SOT-26
Features
  • Efficiency Up to 95%
  • 2A Converter With Built-In 100mΩ/70mΩ Low RDS(ON) Power FETs
  • Input Supply Voltage Range : 2.7V to 6V
  • Output Voltage Range : 0.6V to 3.4V
  • Current Mode Constant On-Time (CMCOT) Control
  • Ultrafast Transient Response
  • No Needs For External Compensations
  • Optimized for Low-ESR Ceramic Output Capacitors
  • 0.6V ±1.2% High-Accuracy Feedback Reference Voltage
  • LS FETs Protection for Robust Over-Current Protection
  • Power Saving in Light Load
  • Fixed Switching Frequency : 1MHz (typ.)
  • Internally Soft-Start Function
  • Monotonic Start-Up for Pre-Biased Output
  • Input Under-Voltage Lockout (UVLO)
  • Output Under-Voltage Protection (UVP) with Hiccup Mode
  • Power Good Indication in SOT-23-6 Package
  • Enable Control
  • Available In SOT-23-5 and SOT-23-6 Packages
Datasheet
TitleLast UpdateShareDownload
6V, 2A, 1MHz, CMCOT Synchronous Step-Down Converter2015/04/29
Videos
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 591
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2019/01/09
Design Tool
TitleLast UpdateShare
Richtek Designer™ Web Simulation Tool : RT8097ALGE2019/09/11
Richtek Designer™ Web Simulation Tool : RT8097AHGE2019/09/11
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8097AHGBSOT-253000 Not available Buy from Distributor
RT8097AHGESOT-263000 Request Buy from Distributor
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