TPS53321  2.9V to 6V, 5-A Step-Down Converter with Integrated MOSFETs | TI.com

TPS53321 (ACTIVE)

 2.9V to 6V, 5-A Step-Down Converter with Integrated MOSFETs

 

Description

The TPS53321 device provides a fully integrated 3-V to 5-V VIN integrated synchronous FET converter solution with 16 total components in 200 mm2 of PCB area. Due to the low ON-resistance and TI’s Proprietary SmoothPWM™ skip mode of operation, it enables 96% peak efficiency and over 90% efficiency at loads as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power dense 5-A solution.

The TPS53321 features a 1.1-MHz switching frequency, skip mode operation support, prebias start-up, internal soft start, output soft discharge, internal VBST switch, power good, EN/input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections, and all ceramic output capacitor support. It supports supply voltage from 2.9 V to 3.5 V and conversion voltage from 2.9 V to 6 V. The output voltage is adjustable from 0.6 V to 0.84 V × VIN.

The TPS53321 is available in the 3 mm × 3 mm 16-pin QFN package (Green RoHs compliant and Pb free) and operates between –40°C and 85°C.

Features

  • 96% Maximum Efficiency
  • Continuous 5-A Output Current
  • Supports All MLCC Output Capacitor
  • SmoothPWM™ Auto-Skip Eco-Mode™ for Light-Load Efficiency
  • Optimized Efficiency at Light and Heavy Loads
  • Voltage Mode Control
  • Supports Master-Slave Interleaved Operation
  • Synchronization up to ±20% of Nominal Frequency
  • Conversion Voltage Range Between 2.9 V and 6 V
  • Soft-Stop Output Discharge During Disable
  • Adjustable Output Voltage Ranging Between 0.6 V and 0.84 V × VIN
  • Overcurrent, Overvoltage, and Overtemperature Protection
  • Small 3 mm × 3 mm, 16-Pin QFN Package
  • Open-Drain Power Good Indication
  • Internal Boot Strap Switch
  • Low RDS(on), 24 mΩ With 3.3-V Input and 19-mΩ With 5-V Input
  • Supports Prebias Start-Up

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Parametrics Compare all products in Buck converters (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
Type
Package size: mm2:W x L (PKG)
TPS53321 TPS53310 TPS53311 TPS53314 TPS53315
2.9     2.9     2.9     3     3    
6     6     6     15     15    
0.6     0.6     0.6     0.6     0.6    
4.2     4.2     4.2     5.5     5.5    
5     3     3     6     12    
1     1     1     1     1    
1100     1100     1100     250     250    
1100     1100     1100     1000     1000    
0.32     0.32     0.32     0.32     0.32    
Enable
Frequency Synchronization
Light Load Efficiency
Output Discharge
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Phase Interleaving
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Phase Interleaving
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Voltage Mode     Voltage Mode     Voltage Mode     D-CAP     D-CAP    
99     99     99     90     90    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
Catalog     Catalog     Catalog     Catalog     Catalog    
VQFN | 16     VQFN | 16     VQFN | 16     VQFN | 40     VQFN | 40    
Converter     Converter     Converter     Converter     Converter    
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     40VQFN: 35 mm2: 5 x 7 (VQFN | 40)     40VQFN: 35 mm2: 5 x 7 (VQFN | 40)