2.95V to 17V, 10A Power Module with Current Sharing



The LMZ31710 SIMPLE SWITCHER power module is an easy-to-use integrated power solution that combines a 10-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 10 × 10 × 4.3 mm QFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design. The device achieves greater than 95% efficiency and excellent power dissipation capability with a thermal impedance of 13.3°C/W. The LMZ31710 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.


  • Complete Integrated Power Solution
    • Small Footprint, Low-Profile Design
    • Pin Compatible with LMZ31707 & LMZ31704
    • 10 mm × 10 mm × 4.3 mm Package
  • Efficiencies Up to 95%
  • Eco-Mode and 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 Voltage 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 and 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
Regulated Outputs (#)
Package Size: mm2:W x L (PKG)
Switching Frequency (Max) (kHz)
Switching Frequency (Min) (kHz)
Switching Frequency (Typ) (kHz)
Operating Temperature Range (C)
LMZ31710 LMZ31520 LMZ31530
10    20    30   
2.95    3    3   
17    14.5    14.5   
0.6    0.6    0.6   
5.5    3.6    3.6   
Adjustable    Adjustable    Adjustable   
Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Light Load Efficiency   
EMI Tested
Light Load Efficiency
Power Good
Remote Sense   
EMI Tested
Light Load Efficiency
Power Good
Remote Sense   
1    1    1   
42B3QFN: 100 mm2: 10 x 10(B3QFN)    72BQFN: 240 mm2: 15 x 16(BQFN)    72BQFN: 240 mm2: 15 x 16(BQFN)   
1200    850    850   
200    300    300   
1000    500    500   
Buck    Buck    Buck   
-40 to 85    -40 to 85    -40 to 85   
42B3QFN    72BQFN    72BQFN   
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WEBENCH® Designer LMZ31710

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.6 to 5.5V
Iout  A ≤ 10A
Ambient Temp  °C -40 to 125°C

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