LMZ34202 (ACTIVE)

4.5V to 42V, 2A Step-Down Power Module in QFN Package

 

Recommended alternative parts

  • LMZ36002  -  This device is pin and footprint compatible with the LMZ36002, a 60V/2A step-down power module

Description

The LMZ34202 SIMPLE SWITCHER® power module is an easy-to-use integrated power supply that combines a 2-A DC-DC converter with a shielded inductor and passives into a low profile, QFN package. This total power solution allows as few as three external components while maintaining an ability to adjust key parameters to meet specific design requirements.

The QFN package is easy to solder to a printed circuit board, allows reflow profiles up to 260°C, and has excellent power dissipation capability. The LMZ34202 offers flexibilty with many features and is ideal for powering a wide range of devices and systems.

Features

  • Complete Integrated Power Solution Allows
    Small Footprint, Low-Profile Design
  • 10 mm × 10 mm × 4.3 mm Package
  • Wide-Output Voltage Adjust (2.5 V to 7.5 V)
  • Adjustable Switching Frequency
    (200 kHz to 1 MHz)
  • Synchronizes to an External Clock
  • Automatic PFM Mode for Light Load Efficiency
  • Adjustable Soft-Start Time
  • Output Voltage Sequencing / Tracking
  • Power Good Output
  • Programmable Undervoltage Lockout (UVLO)
  • Over-Temperature Thermal Shutdown Protection
  • Over-Current Protection (Hiccup Mode)
  • Pre-Bias Output Start-Up
  • Operating Temperature Range: –40°C to 105°C
  • Enhanced Thermal Performance: 14°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
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
LMZ34202 LMZ14202 LMZ14202H LMZ14203 LMZ14203H LMZ23603 LMZ35003 LMZ36002 LMZM33603
2    2    2    3    3    3    2.5    2    3   
4.5    6    6    6    6    6    7    4.5    4   
42    42    42    42    42    36    50    60    36   
2.5    0.8    5    0.8    5    0.8    2.5    2.5    1   
7.5    6    24    6    24    6    15    7.5    18   
Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Fixed   
EMI Tested
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Remote Sense   
EMI Tested
Enable
Tracking   
EMI Tested
Enable
Tracking   
EMI Tested
Enable
Tracking   
EMI Tested
Enable
Tracking   
EMI Tested
Enable
Frequency Synchronization
Tracking   
EMI Tested
Enable
Frequency Synchronization
Power Good
Remote Sense
Tracking   
EMI Tested
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Remote Sense   
EMI Tested
Enable
Frequency Synchronization
Power Good   
  1    1    1    1    2.6         
1    1    1    1    1    1    1    1    1   
43B3QFN: 100 mm2: 10 x 10(B3QFN)    7TO-PMOD: 140 mm2: 13.77 x 10.16(TO-PMOD)    7TO-PMOD: 140 mm2: 13.77 x 10.16(TO-PMOD)    7TO-PMOD: 140 mm2: 13.77 x 10.16(TO-PMOD)    7TO-PMOD: 140 mm2: 13.77 x 10.16(TO-PMOD)    7TO-PMOD: 140 mm2: 13.77 x 10.16(TO-PMOD)    41B1QFN: 99 mm2: 9 x 11(B1QFN)    43B3QFN: 100 mm2: 10 x 10(B3QFN)    18B2QFN: 63 mm2: 7 x 9(B2QFN)   
1000    1000    1000    1000    1000    950    1000    1000    1200   
200    200    200    200    200    650    300    200    200   
500    800    800    800    800    812    400    500    400   
Buck
Synchronous Buck   
Buck
Synchronous Buck   
Buck
Synchronous Buck   
Buck
Synchronous Buck   
Buck
Synchronous Buck   
Buck
Synchronous Buck   
Buck    Buck
Synchronous Buck   
Buck
Synchronous Buck   
-40 to 105    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 85    -40 to 85    -40 to 105    -40 to 105   
43B3QFN    7TO-PMOD    7TO-PMOD    7TO-PMOD    7TO-PMOD    7TO-PMOD    41B1QFN    43B3QFN    18B2QFN   
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WEBENCH® Designer LMZ34202

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 2.5 to 7.5V
Iout  A ≤ 2A
Ambient Temp  °C -40 to 105°C


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