LMZ31704 2.95V to 17V, 4A Step-Down Power Module with Current Sharing in 10x10x4.3mm QFN Package | TI.com

LMZ31704 (ACTIVE)

2.95V to 17V, 4A Step-Down Power Module with Current Sharing in 10x10x4.3mm QFN Package

2.95V to 17V, 4A Step-Down Power Module with Current Sharing in 10x10x4.3mm QFN Package - LMZ31704
Datasheet
LMZ31704 4-A Power module with 2.95-V to 17-V input and current sharing datasheet (Rev. D)
 

Description

The LMZ31704 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 10 × 10 × 4.3 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
  • 10 mm × 10 mm × 4.3 mm package
    • Pin compatible with LMZ31710 and 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
  • Create a custom design using the LMZ31704 with the WEBENCH® Power Designer

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

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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Parametrics

Compare all products in Buck modules (integrated inductor) Email Download to Excel
Part number Order 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
LMZ31704 Order now 4     2.95     17     0.6     5.5     Adjustable     Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Tracking
Light Load Efficiency    		 0.8     1     42B3QFN: 100 mm2: 10 x 10 (B3QFN | 42)     1200     200     1000     Buck
Synchronous Buck    		 -40 to 85     100     B3QFN | 42     Catalog     Module    
LMZ31707 Order now 7     2.95     17     0.6     5.5     Adjustable     Current Sharing
EMI Tested
Frequency Synchronization
Power Good
Remote Sense
Tracking
Light Load Efficiency    		 0.8     1     42B3QFN: 100 mm2: 10 x 10 (B3QFN | 42)     1200     200     1000     Buck
Synchronous Buck    		 -40 to 85     100     B3QFN | 42     Catalog     Module    
TPSM84424 Order now 4     4.5     17     0.6     10     Adjustable     EMI Tested
Enable
Frequency Synchronization
Power Good
TurboTrans    		 19     1     See datasheet (QFM)     1600     200     450     Buck
Synchronous Buck    		 -40 to 105     75     QFM | 24     Catalog     Module    
TPSM84624 Order now 6     4.5     17     0.6     10     Adjustable     EMI Tested
Enable
Frequency Synchronization
Power Good
TurboTrans    		 19     1     See datasheet (QFM)     1600     200     500     Buck
Synchronous Buck    		 -40 to 105     75     QFM | 24     Catalog     Module    
TPSM84824 Order now 8     4.5     17     0.6     10     Adjustable     EMI Tested
Enable
Frequency Synchronization
Power Good
Tracking
TurboTrans    		 19