LM46000 3.5 - 60V, 500mA Synchronous Step-Down Voltage Converter | TI.com

LM46000 (ACTIVE)

3.5 - 60V, 500mA Synchronous Step-Down Voltage Converter

3.5 - 60V, 500mA Synchronous Step-Down Voltage Converter - LM46000
 

Description

The LM46000 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 500 mA of load current from an input voltage range of 3.5 V to 60 V. The LM46000 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 1 A and 2 A load current options in pin-to-pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft start, extendable soft start, and tracking provide a flexible and easy-to-use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short-circuit protection. The LM46000 device is available in the 16-pin leaded HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch. Pin-to-pin compatible with LM46001, LM46002, LM43603, LM43602, LM43601, and LM43600.

Features

  • 24-µA Quiescent Current in Regulation
  • High Efficiency at Light Load (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI standards
  • Integrated Synchronous Rectification
  • Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)
  • Frequency Synchronization to External Clock
  • Internal Compensation
  • Stable With Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Power-Good Flag
  • Soft-Start into Prebiased Load
  • Internal Soft Start: 4.1 ms
  • Extendable Soft-Start Time by External Capacitor
  • Output Voltage Tracking Capability
  • Precision Enable to Program System UVLO
  • Output Short-Circuit Protection With Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM46000 With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck Converter (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
LM46000 LM5165 LM5166 LMR36006 LMR36015
3.5     3     3     4.2     4.2    
60     65     65     60     60    
1     1.23     1.23     1     1    
28     65     65     57     57    
0.5     0.15     0.5     0.6     1.5    
1     1     1     1     1    
200     50     50     1000     400    
2200     600     600     2100     1000    
0.024     0.01     0.01     0.023     0.023    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Current Mode     Constant on-time (COT)     Constant on-time (COT)     Current Mode     Current Mode    
99     100     100     98     98    
-40 to 125     -40 to 150     -40 to 150     -40 to 150     -40 to 150    
Catalog     Catalog     Catalog     Catalog     Catalog    
HTSSOP     VSON     VSON     VQFN-HR     VQFN-HR    

Other qualified versions of LM46000

Version Part Number Definition
Automotive LM46000-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
New! Interactive Design
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WEBENCH® Designer LM46000

  Min   Max Range
Vin  V 3.5 to 60.0V
Vout  V 1.02 to 28.0V
Iout  A ≤ 0.5A
Ambient Temp  °C -40 to 125°C


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