6A SIMPLE SWITCHER® Power Module with 2.95V-14.5V Input in QFN package with Current Sharing


The LMZ31506 SIMPLE SWITCHER® power module is an easy-to-use integrated power solution that combines a 6-A DC-to-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 9×15×2.8 mm QFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design with greater than 90% efficiency and excellent power dissipation with a thermal impedance of 13°C/W junction to ambient. The device delivers the full 6-A rated output current at 85°C ambient temperature without airflow.

The LMZ31506 offers the flexibility and the feature-set of a discrete point-of-load design and is ideal for powering performance DSPs and FPGAs. Advanced packaging technology afford a robust and reliable power solution compatible with standard QFN mounting and testing techniques.


  • Complete Integrated Power Solution Allows Small Footprint, Low-Profile Design
  • 9mm x 15mm x 2.8mm package
    • Pin Compatible with LMZ31503
  • Efficiencies Up To 96%
  • 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 voltage down to 1.6 V
  • Adjustable Switching Frequency (250 kHz to 780 kHz)
  • Synchronizes to an External Clock
  • Adjustable Slow-Start
  • Output Voltage Sequencing / Tracking
  • Power Good Output
  • Programmable Undervoltage Lockout (UVLO)
  • Output Overcurrent Protection (Hiccup Mode)
  • Over-Temperature Protection
  • Pre-bias Output Start-up
  • Operating Temperature Range: –40°C to 85°C
  • Enhanced Thermal Performance: 13°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
Special Features
Regulated Outputs (#)
Switching Frequency (Max) (kHz)
Switching Frequency (Min) (kHz)
Operating Temperature Range (C)
Approx. Price (US$)
LMZ31506 LMZ31503
6     3    
2.95     4.5    
14.5     14.5    
0.6     0.8    
5.5     5.5    
Adjustable     Adjustable    
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
1     1    
780     780    
250     330    
Buck     Buck    
-40 to 85     -40 to 85    
47B1QFN     47B1QFN    
5.45 | 1ku     4.25 | 1ku    
    Min   Max   Range  
  Vin V    4.50 – 14.50V  
  Vout V    0.60 – 5.50V  
  Iout A    ≤ 6A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
'U1 Rrt Rset Rpg Coutx Cout Cin '
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