LMZ31704 (ACTIVE)

2.95V to 17V, 4A Step-Down Power Module with Current Sharing in 10x10x4.3mm QFN Package

2.95V to 17V, 4A Step-Down Power Module with Current Sharing in 10x10x4.3mm QFN Package - LMZ31704
 

Description

The LMZ31704 power module is an easy-to-use integrated power solution that combines a 4-A DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low profile, QFN package. This total power solution allows as few as three external components and eliminates the loop compensation and magnetics part selection process.

The 10x10x4.3 mm QFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design. Achieves greater than 95% efficiency and excellent power dissipation capability with a thermal impedance of 13.3°C/W. The LMZ31704 offers the flexibility and the feature-set of a discrete point-of-load design and is ideal for powering a wide range of ICs and systems. Advanced packaging technology affords a robust and reliable power solution compatible with standard QFN mounting and testing techniques.

Features

  • Complete Integrated Power Solution Allows
    Small Footprint, Low-Profile Design
  • 10 mm × 10 mm × 4.3 mm package
    • Pin Compatible with LMZ31710 & LMZ31707
  • Efficiencies Up To 95%
  • Eco-mode™ / Light Load Efficiency (LLE)
  • Wide-Output Voltage Adjust
    0.6 V to 5.5 V, with 1% Reference Accuracy
  • Supports Parallel Operation for Higher Current
  • Optional Split Power Rail Allows
    Input Voltages Down to 2.95 V
  • Adjustable Switching Frequency
    (200 kHz to 1.2 MHz)
  • Synchronizes to an External Clock
  • Provides 180° out-of-phase Clock Signal
  • Adjustable Slow-Start
  • Output Voltage Sequencing / Tracking
  • Power Good Output
  • Programmable Undervoltage Lockout (UVLO)
  • Overcurrent and Overtemperature Protection
  • Pre-bias Output Start-up
  • Operating Temperature Range: –40°C to 85°C
  • Enhanced Thermal Performance: 13.3°C/W
  • Meets EN55022 Class B Emissions
    • Integrated Shielded Inductor
  • Create a Custom Design Using the LMZ31704 With the WEBENCH® Power Designer

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Parametrics Compare all products in Step-Down (Buck) Module

 
Iout (Max) (A)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Soft Start
Features
Regulated Outputs (#)
Package Size: mm2:W x L (PKG)
Switching Frequency (Max) (kHz)
Switching Frequency (Min) (kHz)
Switching Frequency (Typ) (kHz)
Topology
Operating Temperature Range (C)
Pin/Package
LMZ31704 LMZ31707 TPSM84424 TPSM84624 TPSM84824
4    7    4    6    8   
2.95    2.95    4.5    4.5    4.5   
17    17    17    17    17   
0.6    0.6    0.6    0.6    0.6   
5.5    5.5    10    10    10   
Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Tracking
Light Load Efficiency   
Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Tracking
Light Load Efficiency   
EMI Tested
Enable
Frequency Synchronization
Power Good
TurboTrans   
EMI Tested
Enable
Frequency Synchronization
Power Good
TurboTrans   
EMI Tested
Enable
Frequency Synchronization
Power Good
Tracking
TurboTrans   
1    1    1    1    1   
42B3QFN: 100 mm2: 10 x 10(B3QFN)    42B3QFN: 100 mm2: 10 x 10(B3QFN)    See datasheet (QFM)    See datasheet (QFM)    See datasheet (QFM)   
1200    1200    1600    1600    1600   
200    200    200    200    200   
1000    1000    450    500    500   
Buck    Buck    Buck
Synchronous Buck   
Buck
Synchronous Buck   
Buck
Synchronous Buck   
-40 to 85    -40 to 85    -40 to 105    -40 to 105    -40 to 105   
42B3QFN    42B3QFN    24QFM    24QFM    24QFM   
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.

WEBENCH® Designer LMZ31704

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.6 to 5.5V
Iout  A ≤ 4A
Ambient Temp  °C -40 to 125°C


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