TPS54240 3.5V to 42V Input, 2.5A Step-Down Converter with Eco-Mode | TI.com

TPS54240 (ACTIVE)

3.5V to 42V Input, 2.5A Step-Down Converter with Eco-Mode

 

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Description

The TPS54240 device is a 42-V, 2.5-A, step-down regulator with an integrated high-side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low-ripple, pulse skip mode reduces the no load, regulated output supply current to 138 µA. Using the enable pin, shutdown supply current is reduced to 1.3 µA, when the enable pin is low.

Undervoltage lockout is internally set at 2.5 V, but it can be increased using the enable pin. The output voltage startup ramp is controlled by the slow-start pin that can also be configured for sequencing and tracking. An open-drain power good signal indicates the output is within 94% to 107% of its nominal voltage.

A wide switching frequency range allows efficiency and optimization of external component size. Frequency foldback and thermal shutdown protects the part during an overload condition.

The TPS54240 is available in 10-pin, thermally-enhanced HVSSOP and 10-pin 3-mm × 3-mm PowerPAD package.

Features

  • 3.5-V to 42-V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads With a
    Pulse Skipping Eco-Mode™
  • 138-µA Operating Quiescent Current
  • 1.3-µA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start and Sequencing
  • UV and OV Power Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • 10-Pin HVSSOP and 10-Pin 3-mm x 3-mm
    VSON Packages with PowerPAD™
  • Supported by WEBENCH® Software Tool

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

WEBENCH® Designer TPS54240

  Min   Max Range
Vin  V 3.5 to 42.0V
Vout  V 0.8 to 39V
Iout  A ≤ 2.5A
Ambient Temp  °C -40 to 125°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)
TPS54240 Order now 3.5     42     0.8     39     2.5     1     100     2500     0.138     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Tracking
UVLO Adjustable    
Current Mode     98     -40 to 125     Catalog     MSOP-PowerPAD | 10
VSON | 10    
Converter     10MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 10)
10VSON: 9 mm2: 3 x 3 (VSON | 10)    
LM43603 Order now 3.5     36     1     28     3     1     200     2200     0.027     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Synchronous Rectification
Tracking    
Current Mode     99     -40 to 125     Catalog     HTSSOP | 16
SON | 16    
Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
See datasheet (SON)    
LM73605 Order now 3.5     36     1     34     5     1     350     2200     0.015     Enable
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Fixed
Wettable Flanks Package
Soft Start Adjustable    
Current Mode     96     -40 to 125     Catalog     WQFN | 30     Converter     30WQFN: 24 mm2: 4 x 6 (WQFN | 30)    
LM73606 Order now 3.5     36     1     34     6     1     350     2200     0.015     Enable
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Fixed
Wettable Flanks Package    
Current Mode     95     -40 to 125     Catalog     WQFN | 30     Converter     30WQFN: 24 mm2: 4 x 6 (WQFN | 30)    
LMR33630 Order now 3.8     36     1     34     3     1     400     2100     0.024