LMZ31520 3V to 14.5V, 20A Step-Down Power Module in 15x16x5.8mm QFN Package | TI.com

LMZ31520 (ACTIVE)

3V to 14.5V, 20A Step-Down Power Module in 15x16x5.8mm QFN Package

 

Description

The LMZ31520 power module is an easy-to-use integrated power solution that combines a 20-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 15×16×5.8 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, has ultra-fast load step response and excellent power dissipation capability with a thermal impedance of 8.6°C/W. The LMZ31520 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;
    Smaller than a Discrete Design
  • 15 mm × 16 mm × 5.8 mm Package Size
    - Pin Compatible with LMZ31530
  • Ultra-Fast Load Step Response
  • Efficiencies Up To 96%
  • Wide-Output Voltage Adjust
    0.6 V to 3.6 V, with 1% Reference Accuracy
  • Optional Split Power Rails Allows
    Input Voltage Down to 3 V
  • Selectable Switching Frequency
    (300 kHz to 850 kHz)
  • Selectable Slow-Start
  • Adjustable Overcurrent Limit
  • Power Good Output
  • Output Voltage Sequencing
  • Over Temperature Protection
  • Pre-bias Output Start-up
  • Operating Temperature Range: –40°C to 85°C
  • Enhanced Thermal Performance: 8.6°C/W
  • Meets EN55022 Class A Emissions
    - Integrated Shielded Inductor
  • Create a Custom Design Using the LMZ31520 With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck modules (integrated inductor)

 
Iout (Max) (A)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Soft Start
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)
Duty cycle (Max) (%)
Package Group
Rating
Type
LMZ31520 LMZ31530 PTH08T250W TPSM846C23 TPSM846C24
20     30     50     35     35    
3     3     4.5     4.5     4.5    
14.5     14.5     14     15     15    
0.6     0.6     0.7     0.35     0.5    
3.6     3.6     3.6     2     2    
Adjustable     Adjustable     Fixed     Adjustable     Fixed    
EMI Tested
Enable
Light Load Efficiency
Power Good
Remote Sense    
EMI Tested
Enable
Light Load Efficiency
Power Good
Remote Sense    
Current Sharing
TurboTrans    
Current Sharing
EMI Tested
Enable
Frequency Synchronization
PMBus
Phase Interleaving
Power Good
Remote Sense
Tracking    
Current Sharing
EMI Tested
Enable
Frequency Synchronization
Output Discharge
Power Good
Remote Sense    
39     39     100     55     55    
1     1     1     1     1    
72BQFN: 240 mm2: 15 x 16 (BQFN | 72)     72BQFN: 240 mm2: 15 x 16 (BQFN | 72)     22Surface Mount Module: 1067 mm2: 26.92 x 39.62 (Surface Mount Module | 22)
22Through-Hole Module: 1067 mm2: 26.92 x 39.62 (Through-Hole Module | 22)    
See datasheet (QFM)     See datasheet (QFM)    
850     850     750     1000     1000    
300     300     550     300     300    
500     500     600     500     500    
Buck
Synchronous Buck    
Buck
Synchronous Buck    
Buck     Buck
Synchronous Buck    
Buck
Synchronous Buck    
-40 to 85     -40 to 85     -40 to 85     -40 to 105     -40 to 105    
80     80     100     83     83    
BQFN | 72     BQFN | 72     Surface Mount Module | 22
Through-Hole Module | 22    
QFM | 59     QFM | 59    
Catalog     Catalog     Catalog     Catalog     Catalog    
Module     Module     Module     Module     Module    

Design tool

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LMZ31520

  Min   Max Range
Vin  V 4.5 to 14.5V
Vout  V 0.6 to 3.6V
Iout  A ≤ 20A
Ambient Temp  °C -40 to 125°C


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