LMR33620 SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI | TI.com

LMR33620 (ACTIVE)

SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI

 

Description

The LMR33620 SIMPLE SWITCHER® regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33620 is capable of driving up to 2 A of load current from an input of up to 36 V. The LMR33620 provides high light load efficiency and output accuracy in a very small solution size. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33620 automatically folds back frequency at light load to improve efficiency. Integration eliminates most external components and provides a pinout designed for simple PCB layout. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. The LMR33620 is available in an 8-pin HSOIC package and in a 12-pin 3 mm × 2 mm VQFN package with wettable flanks.

Features

  • Configured for Rugged Industrial Applications
    • Input Voltage Range: 3.8 V to 36 V
    • Output Voltage Range: 1 V to 24 V
    • Output Current: 2 A
    • 75 mΩ/50 mΩ Low RDS-ON Power MOSFETs
    • Peak-Current-Mode Control
    • Short Minimum On-Time of 68 ns
    • Frequency: 400 kHz, 1.4 MHz, 2.1 MHz
    • Junction Temperature Range –40°C to +125°C
    • Integrated Synchronous Rectification
    • Integrated Compensation Network
  • High Efficiency Solution
    • Peak Efficiency > 95%
    • Low Shutdown Quiescent Current of 5 µA
    • Low Operating Quiescent Current of 25 µA
  • Flexible System Interface
    • Power-Good Flag and Precision Enable
  • Create a Custom Design Using the LMR33620 with the WEBENCH® Power Designer

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Parametrics Compare all products in Buck converters (integrated switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Type
LMR33620 LM43602 LM43603 LMR23630 LMR33630
3.8     3.5     3.5     4.5     3.8    
36     36     36     36     36    
1     1     1     1      
34     28     28     30     34    
2     2     3     3     3    
1     1     1     1     1    
400     200     200     200     400    
2100     2200     2200     2200     2100    
0.024     0.027     0.027     0.075     0.024    
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
98     99     99     97     98    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog    
SO PowerPAD | 8
VQFN-HR | 12    
HTSSOP | 16
SON | 16    
HTSSOP | 16
SON | 16    
SO PowerPAD | 8
SON | 12    
SO PowerPAD | 8
VQFN-HR | 12    
Converter     Converter     Converter     Converter     Converter    

Design tool

WEBENCH® Designer LMR33620

  Min   Max Range
Vin  V 3.8 to 36V
Product Option
Vout  V 1 to 24V
Iout  A ≤ 2A
Ambient Temp  °C -40 to 125°C