TPS63806 2.5-A, high efficiency buck-boost converter with optimized load-step response | TI.com

TPS63806
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2.5-A, high efficiency buck-boost converter with optimized load-step response

 

Description

The TPS63805 and TPS63806 are high efficiency, high output current buck-boost converters. Depending on the input voltage, they automatically operate in boost, buck, or in a novel 4-cycle buck-boost mode when the input voltage is approximately equal to the output voltage. The transitions between modes happen at defined thresholds and avoid unwanted toggling within the modes to reduce output voltage ripple. The device output voltages are individually set by a resistive divider within a wide output voltage range.The TPS63805 achieves the lowest solution size with a tiny bill of materials. An 11-µA quiescent current enables the highest efficiency for little to no-load conditions.

The TPS63806 is optimized for applications where the load-step response under a heavy load profile is a concern.

The TPS63805 and TPS63806 come in a 1.4 mm x 2.3 mm package. The device works with tiny passive components to keep the overall solution size small.

Features

  • Two pin-2-pin device options, TPS63805 and TPS63806 with specific application focus
  • Input voltage range: 1.3 V to 5.5 V
    • Device input voltage > 1.8 V for start-up
  • Output voltage range: 1.8 V to 5.2 V (adjustable)
  • High efficiency over the entire load range
    • Low operating quiescent current
    • Power save mode and mode selection for forced PWM-mode
  • Peak current buck-boost mode architecture
    • Defined transition points between buck, buck-boost, and boost operation modes
    • Forward and reverse current operation
    • Start-up into pre-biased outputs
  • Safety and robust operation features
    • Integrated soft start
    • Overtemperature- and overvoltage-protection
    • True shutdown function with load disconnect
    • Forward and backward current limit
  • TPS63805
    • Optimized for smallest solution size of 18.5 mm2 (works with a 22-µF minimum output capacitor)
    • 2-A Output current for VI ≥ 2.3 V, VO = 3.3 V
    • 11-µA Operating quiescent current
  • TPS63806
    • Optimized for best load step response (180-mV load-step response at a 2 A current step)
    • Up to 2.5 A transient output current
    • 13-µA Operating quiescent current

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WEBENCH® Designer TPS63806

  Min   Max Range
Vin  V 1.3 to 5.5V
Vout  V 1.8 to 5V
Iout  A ≤ 2.5A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Buck-boost, inverting & split-rail converters (integrated switch) Email Download to Excel
Part number Order Topology Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Switch current limit (Typ) (A) Duty cycle (Max) (%) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Features Iq (Typ) (mA) Iout (Max) (A) Rating Type Operating temperature range (C) Package Group
TPS63806 Order now Buck-Boost     1.3     5.5     1.8     5.2     5.5     100     500     3100     Enable
Light Load Efficiency
Load Disconnect
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed    
0.013     2.5     Catalog     Converter     -40 to 125     DSBGA | 15    
TPS63020 Order now Buck-Boost     1.8     5.5     1.2     5.5     4     100     2200     2600     Enable
Frequency Synchronization
Light Load Efficiency
Load Disconnect
Power Good
Synchronous Rectification
UVLO Fixed    
0.05     2     Catalog     Converter     -40 to 85     VSON | 14    
TPS630250 Order now Buck-Boost     2.3     5.5     2.3     3.6     4.5     100     2500     2500     Enable
Light Load Efficiency
Load Disconnect
Output Discharge
Synchronous Rectification
UVLO Fixed    
0.035     2     Catalog     Converter     -40 to 85     DSBGA | 20
VQFN-HR | 14    
TPS63027 Order now Buck-Boost     2.3     5.5     1     5.5     4.5     100     2500     2500     Enable
Light Load Efficiency
Output Discharge    
0.035     2     Catalog     Converter     -40 to 85     DSBGA | 25    
TPS63050 Order now Buck-Boost     2.5     5.5     2.5     5.5     1     100     2500     2500     Adjustable Current Limit
Enable
Light Load Efficiency
Load Disconnect
Power Good
Synchronous Rectification
UVLO Fixed    
0.045     0.5     Catalog     Converter     -40 to 85     DSBGA | 12
VQFN-HR | 12    
TPS63070 Order now