LM73605-Q1 (ACTIVE)

Automotive Qualified 3.5V to 36V, 5A Synchronous Step-Down Voltage Converter

Automotive Qualified 3.5V to 36V, 5A Synchronous Step-Down Voltage Converter - LM73605-Q1
 

Description

The LM73605-Q1/LM73606-Q1 family of devices are easy-to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605-Q1) or 6 A (LM73606-Q1) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605-Q1/LM73606-Q1 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-Q1 and LM73606-Q1 devices are pin-to-pin compatible for easy current scaling.

Features

  • AEC-Q100 Qualified for Automotive Applications
    • Device Temperature Grade 1: –40°C to +125°C Junction Operating Temperature
    • Device HBM ESD Classification Level 2 kV
    • Device CDM ESD Classification Level C5
  • Wettable Flanks QFN Package (WQFN)
  • Low EMI and Low Switching Noise
  • 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)
  • Adjustable Frequency Range: 350 kHz to 2.2 MHz
  • Pin-Selectable Auto Mode or Forced PWM Mode
  • Start-up into Pre-Biased Load, Fixed or Adjustable Soft-Start Time, and Tracking
  • Synchronizable to External Clock, Internal Compensation, Power-Good Flag, and Precision Enable
  • Cycle-by-Cycle Current Limiting, Hiccup, UVLO, and Thermal Shutdown Protections
  • Create a Custom Design With the WEBENCH® Power Designer using LM73605-Q1 or LM73606-Q1

All trademarks are the property of their respective owners.

View more

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
LM73605-Q1 LM73606-Q1 LM76002-Q1 LM76003-Q1 LMR14050-Q1 LMS3635-Q1 LMS3655-Q1
3.5    3.5    3.5    3.5    4    3.5    3.5   
36    36    60    60    40    42    42   
1    1    1    1    1    1    1   
34    34    57    57    30    15    15   
5    6    2.5    3.5    5    3.5    5.5   
1    1    1    1    1    1    1   
350    350    300    300    200    250    250   
2200    2200    2200    2200    2500    500    500   
0.015    0.015    0.015    0.015    0.04    0.015    0.015   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Wettable Flanks Package   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Wettable Flanks Package   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Wettable Flanks Package   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Spread Spectrum
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
96    96        98    98    98   
-40 to 125    -40 to 125    -40 to 150    -40 to 150    -40 to 125    -40 to 150    -40 to 150   
Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive   
WQFN    WQFN    WQFN    WQFN    SO PowerPAD
WSON   
VQFN-HR    VQFN-HR   

Other qualified versions of LM73605-Q1

Version Part Number Definition
Catalog LM73605 TI's standard catalog product
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.

WEBENCH® Designer LM73605-Q1

  Min   Max Range
Vin  V 3.5 to 36.0V
Vout  V 1 to 34V
Iout  A ≤ 5A
Ambient Temp  °C -40 to 125°C


Footprint BOM Cost Efficiency


Preview design