SIMPLE SWITCHER® 2.95V to 17V, 4A Power Module with Current Sharing - LMZ31704

LMZ31704 (ACTIVE)

SIMPLE SWITCHER® 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
Special Features
Iq (Typ) (mA)
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 LMZ20501 LMZ20502 LMZ21700 LMZ21701 LMZ30602 LMZ30604 LMZ30606 LMZ31503 LMZ31506 LMZ31506H LMZ31707
4    1    2    0.65    1    2    4    6    3    6    6    7   
2.95    2.7    2.7    3    3    2.95    2.95    2.95    4.5    2.95    4.5    2.95   
17    5.5    5.5    17    17    6    6    6    14.5    14.5    14.5    17   
0.6    0.8    0.8    0.9    0.9    0.8    0.8    0.8    0.8    0.6    1.2    0.6   
5.5    3.6    3.6    6    6    3.6    3.6    3.6    5.5    5.5    5.5    5.5   
Adjustable    Fixed    Fixed    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Tracking
Light Load Efficiency   
EMI Tested
Enable
Light Load Efficiency
Power Good   
EMI Tested
Enable
Light Load Efficiency
Power Good   
EMI Tested
Enable
Light Load Efficiency
Power Good   
EMI Tested
Enable
Light Load Efficiency
Power Good   
EMI Tested
Enable
Frequency Synchronization
Power Good
Remote Sense
Tracking   
EMI Tested
Enable
Frequency Synchronization
Power Good
Remote Sense
Tracking   
EMI Tested
Enable
Frequency Synchronization
Power Good
Remote Sense
Tracking   
EMI Tested
Enable
Frequency Synchronization
Power Good
Remote Sense
Tracking   
Current Sharing
EMI Tested
Enable
Frequency Synchronization
Power Good
Remote Sense
Tracking   
EMI Tested
Enable
Frequency Synchronization
Power Good
Remote Sense
Tracking   
Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Tracking
Light Load Efficiency   
  0.072    0.072    0.017    0.017                 
1    1    1    1    1    1    1    1    1    1    1    1   
42B3QFN: 100 mm2: 10 x 10(B3QFN)    See datasheet (uSiP)    See datasheet (uSiP)    See datasheet (uSiP)    See datasheet (uSiP)    39B1QFN: 99 mm2: 9 x 11(B1QFN)    39B1QFN: 99 mm2: 9 x 11(B1QFN)    39B1QFN: 99 mm2: 9 x 11(B1QFN)    47B1QFN: 135 mm2: 9 x 15(B1QFN)    47B1QFN: 135 mm2: 9 x 15(B1QFN)    47B1QFN: 135 mm2: 9 x 15(B1QFN)    42B3QFN: 100 mm2: 10 x 10(B3QFN)   
1200    3200    3200    2500    2500    2000    2000    2000    780    780    780    1200   
200    2500    2500    1250    1250    500    500    500    330    250    480    200   
1000    3000    3000    2000    2000    1250    1250    1250    500    500    600    1000   
Buck    Synchronous Buck    Synchronous Buck    Synchronous Buck    Synchronous Buck    Buck    Buck    Buck    Buck    Buck    Buck    Buck   
-40 to 85    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
42B3QFN    8uSiP    8uSiP    8uSiP    8uSiP    39B1QFN    39B1QFN    39B1QFN    47B1QFN    47B1QFN    47B1QFN    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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