LM73606 3.5V to 36V, 6A Synchronous Step-Down Voltage Converter | TI.com

LM73606 (ACTIVE) 3.5V to 36V, 6A Synchronous Step-Down Voltage Converter

3.5V to 36V, 6A Synchronous Step-Down Voltage Converter - LM73606
Datasheet
LM73605/LM73606 3.5-V to 36-V, 5-A or 6-A Synchronous Step-Down Voltage Converter datasheet
 

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Description

The LM73605/LM73606 family of devices are easy-to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605) or 6 A (LM73606) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605/LM73606 provide exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load and optional external bias improve efficiency over the entire load range. The family requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. The LM73605 and LM73606 devices are pin-to-pin compatible for easy current scaling.

Features

  • Synchronous Rectification
  • Wettable Flanks QFN Package (WQFN)
  • Low Quiescent Current
    • 0.8 µA in Shutdown (typical)
    • 15 µA in Active Mode with No Load (typical)
  • Wide Voltage Conversion Range:
    • tON_MIN = 60 ns (typical)
    • tOFF_MIN = 70 ns (typical)
  • Low MOSFET ON-Resistance:
    • RDS_ON_HS = 53 mΩ (typical)
    • RDS_ON_LS = 31 mΩ (typical)
  • External Bias Input to Improve Efficiency
  • Pin-Selectable Auto Mode or Forced PWM Operation
  • Adjustable Frequency Range: 350 kHz to 2.2 MHz
  • Synchronizable to External Clock
  • Internal Compensation
  • Power-Good Flag
  • Precision Enable to Program System UVLO
  • Flexible Soft-Start Features:
    • Start-up into Pre-Biased Load
    • Fixed or Adjustable Soft-Start Time
    • Output Voltage Tracking
  • Cycle-by-Cycle Current Limiting
  • Short-Circuit Protection With Hiccup Mode
  • Thermal Shutdown Protection
  • Create a Custom Design With the WEBENCH® Power Designer using LM73605 or LM73606

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WEBENCH® Designer LM73606

  Min   Max Range
Vin –  V 3.5 to 36.0V
Vout  V 1 to 34V
Iout  A ≤ 6A
Ambient Temp  °C -40 to 125°C

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Parametrics

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Part number Order 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 Package size: mm2:W x L (PKG)
LM73606 Order now 3.5     36     1     34     6     1     350     2200     0.015     Enable
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Fixed
Wettable Flanks Package    		 Current Mode     95     -40 to 125     Catalog     WQFN | 30     Converter     30WQFN: 24 mm2: 4 x 6 (WQFN | 30)    
LM43603 Order now 3.5     36     1     28     3     1     200     2200     0.027     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Synchronous Rectification
Tracking    		 Current Mode     99     -40 to 125     Catalog     HTSSOP | 16
SON | 16    		 Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16SON: 20 mm2: 4 x 5 (SON | 16)    
LM61440 Samples not available 3     36     1     34     4     1     200     2200     0.009     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Soft Start Adjustable
Spread Spectrum
Synchronous Rectification
Wettable Flanks Package    		 Current Mode     98     -40 to 150     Catalog     VQFN-HR | 14     Converter     14VQFN-HR: 14 mm2: 3.5 x 4 (VQFN-HR | 14)    
LM61460 Samples not available 3     36     1     34     6     1     200     2200     0.009     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Soft Start Adjustable
Spread Spectrum
Synchronous Rectification
Wettable Flanks Package    		 Current Mode     98     -40 to 150     Catalog     VQFN-HR | 14     Converter     14VQFN-HR: 14 mm2: 3.5 x 4 (VQFN-HR | 14)    
LM73605 Order now 3.5     36     1     34     5     1     350     2200     0.015