TPS54618 2.95V to 6V Input, 6A, Synchronous Step-Down SWIFT™ Converter | TI.com

TPS54618
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2.95V to 6V Input, 6A, Synchronous Step-Down SWIFT™ Converter

 

Recommended alternative parts

  • TPS54678  -  2.95V to 6V Input, 6A, Synchronous Step-Down Converter with Pre-bias Start-Up & Hiccup Current Limit

Description

The TPS54618 device is a full-featured 6-V, 6-A, synchronous step-down current-mode converter with two integrated MOSFETs.

The TPS54618 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.

The TPS54618 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 and 515-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 5.5-µA by entering a shutdown mode.

Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output-voltage start-up ramp is controlled by the slow-start pin. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage.

Frequency foldback and thermal shutdown protect the device during an overcurrent condition.

For more SWIFT™ documentation, see the TI website at www.ti.com/swift.

Features

  • Two 12-mΩ (typical) MOSFETs for high efficiency at 6-A loads
  • 300-kHz to 2-MHz switching frequency
  • 0.8-V ±1% Voltage reference over temperature (–40°C to +150°C)
  • Synchronizes to external clock
  • Adjustable slow start and sequencing
  • UV and OV power-good output
  • –40°C to 150°C Operating Junction Temperature Range
  • Thermally enhanced 3-mm × 3-mm, 16-pin WQFN package
  • Pin-Compatible to TPS54418
  • Create a custom design using the TPS54618 with the WEBENCH® Power Designer

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WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS54618

  Min   Max Range
Vin  V 2.95 to 6.0V
Vout  V 0.8 to 6V
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)
TPS54618 Order now 2.95     6     0.8     4.5     6     1     200     2000     0.515     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable    
Current Mode     98     -40 to 150     Catalog     WQFN | 16     Converter     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)