TPS54678 2.95V to 6V Input, 6A Synchronous Step-Down SWIFT™ Converter with Hiccup Current Limit | TI.com

TPS54678
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2.95V to 6V Input, 6A Synchronous Step-Down SWIFT™ Converter with Hiccup Current Limit

 

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Description

TPS54678 device is a full-featured 6-V, 6-A, synchronous step-down current mode converter with two integrated MOSFETs.

TPS54678 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.

TPS54678 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature.

Efficiency is maximized through the integrated 12-mΩ MOSFETs. Using the enable (EN) pin, shutdown supply current is reduced by disabling the device.

The output voltage start-up ramp is controlled by the soft-start (SS) pin that can also be configured for sequencing or tracking. Monotonic start-up is achieved with prebiased voltage. Undervoltage lockout can be increased by programming the threshold with a resistor divider on the enable pin. An open-drain power good signal indicates the output is within 93% to 105% of its nominal voltage.

Cycle-by-cycle current limit, hiccup overcurrent protection and thermal shutdown protect the device during an overcurrent condition.

Features

  • Two 12-mΩ (typical) MOSFETs for high-efficiency 6-A continuous output current
  • 200-kHz to 2-MHz Switching frequency
  • 0.6-V ±1% Voltage reference over temperature (–40°C to 150°C)
  • Synchronizes to external clock
  • Start-Up with prebiased voltage
  • Power good output
  • Adjustable slow start and sequencing
  • Cycle-by-cycle current limit and hiccup current protection
  • Adjustable input voltage UVLO
  • Thermally enhanced 16-pin 3-mm × 3-mm WQFN (RTE)
  • Create a custom design using the TPS54678 with the WEBENCH® Power Designer

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WEBENCH® Designer TPS54678

  Min   Max Range
Vin  V 2.95 to 6.0V
Vout  V 0.6 to 4.5V
Iout  A ≤ 6A
Ambient Temp  °C -40 to 140°C

Parametrics

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Part number Order 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)
TPS54678 Order now 2.95     6     0.6     4.5     6     1     200     2000     0.57     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 125
-40 to 150    
Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
TPS54218 Order now 2.95     6     0.8     4.5     2     1     200     2000     0.35     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
TPS54318 Order now 2.95     6     0.8     4.5     3     1     200     2000     0.35     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
TPS54478 Order now 2.95     6     0.6     4.5     4     1     200     2000     0.525     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable
Soft Start Adjustable    
Current Mode     98     -40 to 150     Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)