TPS62356 1A, 3MHz Buck Converter with I2C for Dynamic Voltage Scaling | TI.com

TPS62356 (ACTIVE)

1A, 3MHz Buck Converter with I2C for Dynamic Voltage Scaling

 

Description

The TPS6235x device is a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications. Intended for low-power applications, the TPS6235x supports up to 800-mA load current and allows the use of small, low cost inductors and capacitors.

The device is ideal for mobile phones and similar portable applications powered by a single-cell Li-Ion battery. With an output voltage range adjustable via I2C interface down to 0.6 V, the device supports low-voltage DSPs and processors core power supplies in smart-phones, PDAs, and handheld computers.

The TPS6235x operates at 3-MHz fixed switching frequency and enters the efficiency optimized power-save mode operation at light load currents to maintain high efficiency over the entire load current range. In the shutdown mode, the current consumption is reduced to less than 2 µA.

The serial interface is compatible with Fast/Standard and High-Speed mode I2C specification allowing transfers at up to 3.4 Mbps. This communication interface is used for dynamic voltage scaling with voltage steps down to 12.5 mV, for reprogramming the mode of operation (Light PFM, Fast PFM or Forced PWM) or disable/enabling the output voltage.

Features

  • 88% Efficiency at 3-MHz Operation
  • 800-mA Output Current at VI = 2.7 V
  • 3-MHz Fixed Frequency Operation
  • Best in Class Load and Line Transient
  • Complete 1-mm Component Profile Solution
  • ±2% PWM DC Voltage Accuracy
  • 35-ns Minimum On-Time
  • Efficiency Optimized Power-Save Mode (Light PFM)
  • Transient Optimized Power-Save Mode (Fast PFM)
  • 28-µA Typical Quiescent Current
  • I2C Compatible Interface up to 3.4 Mbps
  • Pin-Selectable Output Voltage
  • Synchronizable On the Fly to External Clock Signal
  • Available in a 10-Pin QFN (3 × 3 mm) and 12-Pin NanoFree™ (CSP) Packaging
  • APPLICATIONS
    • SmartReflex™ Compliant Power Supply
    • Split Supply DSPs and µP Solutions
      OMAP™, XSCALE™
    • Cell Phones, Smart-Phones
    • PDAs, Pocket PCs
    • Digital Cameras
    • Micro DC-DC Converter Modules

NanoFree, SmartReflex, OMAP, PowerPAD Is a trademark of Texas Instruments.
XSCALE is a trademark of Intel Corporation.
I2C is a trademark of Philips Corporation.

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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)
TPS62356 TPS62350 TPS62351 TPS62352 TPS62353 TPS62354 TPS62355
2.7     2.7     2.7     2.7     2.7     2.7     2.7    
5.5     5.5     5.5     5.5     5.5     5.5     5.5    
1.5     0.75     0.9     0.75     0.75     0.75     0.75    
1.975     1.5375     1.6875     1.4375     1.5375     1.5375     1.5375    
1     0.8     0.8     0.8     0.8     0.8     0.8    
1     1     1     1     1     1     1    
2650     2650     2650     2650     2650     2650     2650    
3350     3350     3350     3350     3350     3350     3350    
0.028     0.028     0.028     0.028     0.028     0.028     0.028    
Enable
Frequency Synchronization
I2C
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Enable
Frequency Synchronization
I2C
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Enable
Frequency Synchronization
I2C
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Enable
Frequency Synchronization
I2C
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Enable
Frequency Synchronization
I2C
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Enable
Frequency Synchronization
I2C
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Enable
Frequency Synchronization
I2C
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode    
80     80     80     80     80     80     80    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
DSBGA | 12     DSBGA | 12     VSON | 10     DSBGA | 12     DSBGA | 12     DSBGA | 12     VSON | 10    
Converter     Converter     Converter     Converter     Converter     Converter     Converter    
See datasheet (DSBGA)     See datasheet (DSBGA)     10VSON: 9 mm2: 3 x 3 (VSON | 10)     See datasheet (DSBGA)     See datasheet (DSBGA)     See datasheet (DSBGA)     10VSON: 9 mm2: 3 x 3 (VSON | 10)