LMZ31704 (ACTIVE)

2.95V to 17V, 4A Power Module with Current Sharing

 

Description

The LMZ31704 SIMPLE SWITCHER 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
  • 10mm x 10mm x 4.3mm 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

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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
4   
2.95   
17   
0.6   
5.5   
Adjustable   
Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Tracking
Light Load Efficiency   
1   
42B3QFN: 100 mm2: 10 x 10(B3QFN)   
1200   
200   
1000   
Buck   
-40 to 85   
42B3QFN   
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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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