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1.5A, 1MHz, 6V CMCOT Synchronous Step-Down Converter

RT5796B

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The RT5796B is a high efficiency synchronous step-down DC/DC converter. Its input voltage range is from 2.5V to 6V and provides an adjustable regulated output voltage from 0.6V to 3.4V while delivering up to 1.5A of output current.

The internal synchronous low on-resistance power switches increase efficiency and eliminate the need for an external Schottky diode. The Current Mode Constant-On-time (CMCOT) operation with internal compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The RT5796B is available in the T/SOT-23-5 and T/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.
RT5796B
Status Active
Vin (min) (V) 2.5
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) 1.5
Current Limit (typ) (A) 1.8
Freq (typ) (kHz) 1000
Ext Sync No
Ron_HS (typ) (mOhm) 160
Ron_LS (typ) (mOhm) 110
Iq (typ) (mA) 0.3
Features Force PWM;OCP;UVP
Package Type SOT-25;SOT-26;TSOT-25;TSOT-26
Features
  • Efficiency Up to 95%
  • RDSON 160mΩ HS / 110mΩ LS
  • VIN Range 2.5V to 6V
  • VREF 0.6V with ±2% Accuracy
  • CMCOT Control Loop Design for Best Transient Response, Robust Loop Stability with Low-ESR (MLCC) COUT
  • Fixed Soft-Start 1.2ms; PGOOD Function in T/SOT-23-6
  • Cycle-by-Cycle Over Current Protection
  • Input Under Voltage Lockout
  • Output Under Voltage Protection (UVP Hiccup)
  • Thermal Shutdown Protection
Datasheet
TitleLast UpdateShareDownload
1.5A, 1MHz, 6V CMCOT Synchronous Step-Down Converter2014/11/10
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 : RT5796BHGJ62019/09/11
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT5796BHGBSOT-253000 Not available Buy from Distributor
RT5796BHGESOT-263000 Not available Buy from Distributor
RT5796BHGJ5TSOT-253000 Not available Buy from Distributor
RT5796BHGJ6TSOT-263000 Not available Buy from Distributor
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