TPS62821 1A Step-Down Converter With 1% Accuracy in 1.5x2mm QFN | TI.com

TPS62821 (ACTIVE)

1A Step-Down Converter With 1% Accuracy in 1.5x2mm QFN

1A Step-Down Converter With 1% Accuracy in 1.5x2mm QFN - TPS62821
 

Description

The TPS6282x is an all-purpose and easy to use synchronous step-down DC-DC converter with a very low quiescent current of only 4µA. It supplies up to 3A output current (TPS62823) from a 2.4V to 5.5V input voltage. Based on the DCS-Control™ topology it provides a fast transient response.

The internal reference allows to regulate the output voltage down to 0.6V with a high feedback voltage accuracy of 1% over the junction temperature range of -40°C to 125°C. The 1,2,3A scalable pin-to-pin and BOM-to-BOM compatible device family can be used with small 470nH inductors.

The TPS6282x include an automatically entered power save mode to maintain high efficiency down to very light loads.

The device features a Power Good signal and an internal soft start circuit. It is able to operate in 100% mode. For fault protection, it incorporates a HICCUP current limit as well as a thermal shutdown.

The TPS6282x are packaged in a 2 x 1.5mm QFN-8 package.

Features

  • DCS-Control™ topology
  • 26/25mΩ Internal Power Switches (TPS62823)
  • Up to 3A Output Current (TPS62823)
  • Very Low Quiescent Current of 4 µA
  • Switching Frequency of typically 2.2 MHz
  • 1% Feedback Voltage Accuracy (full temp. range)
  • Enable (EN) and Power Good (PG)
  • Adjustable Output Voltage from 0.6 V to 4V
  • 100% Duty-Cycle Mode
  • Internal Soft-Start Circuitry
  • Seamless Power Save Mode Transition
  • Undervoltage Lockout
  • Active Output Discharge
  • Cycle-by-Cycle Current Limit
  • HICCUP Short-Circuit Protection
  • Over Temperature Protection
  • Create a Custom Design using the TPS62822 with the WEBENCH® Power Designer

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS62821 TPS62080 TPS62097 TPS62125 TPS62175 TPS62230 TPS62671 TPS62740 TPS62742 TPS62745 TPS62746 TPS62748 TPS62823
2.4     2.3     2.5     3     4.7     2.05     2.3     2.2     3     3.3     2     2.15     2.4    
5.5     6     6     17     28     6     4.8     5.5     5.5     10     5.5     5.5     5.5    
0.6     0.5     0.8     1.2     1     2.5     1.8     1.8     1.8     1.8     1.2     1.2     0.6    
4     4     6     10     6     2.5     1.8     3.3     3.3     3.3     3.3     1.8     4    
1     1.2     2     0.3     0.5     0.5     0.5     0.3     0.4     0.3     0.3     0.3     3    
1     1     1     1     1     1     1     1     1     1     1     1     1    
2200     2000     1500     1000     1000     2000     5400     2000     2000     2500     1200     1200     2200    
2200     2000     2500     1000     1000     3000     6600     2000     2000     2500     1200     1200     2200    
0.004     0.0065     0.04     0.013     0.0048     0.022     0.017     0.0003     0.0003     0.0004     0.0003     0.00036     0.004    
Enable
Light Load Efficiency
Output Discharge
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Enable
Light Load Efficiency
Load Disconnect
Output Discharge
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Output Discharge
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Synchronous Rectification    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Spread Spectrum
Synchronous Rectification    
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Dynamic Voltage Scaling
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Load Disconnect     Enable
Light Load Efficiency
Output Discharge
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control