3.5 to 36Vin, 3 Ampere Synchronous DC-DC Converter for Automotive Applications - LM53603-Q1

LM53603-Q1 (ACTIVE)

3.5 to 36Vin, 3 Ampere Synchronous DC-DC Converter for Automotive Applications

 

Recommended alternative parts

  • LM26003-Q1  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Can be used in application where customer is looking for ASYNC solution rather than a SYNC solution
  • LM43603-Q1  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Automotive customer who wants to use sub AM band frequencies

Description

The LM53603-Q1, LM53602-Q1 buck regulators are specifically designed for automotive applications, providing an output voltage of 5 V or 3.3 V (with ADJ option) at 3 A or 2 A, from an input voltage of up to 36 V. Advanced high-speed circuitry allows the device to regulate from an input of up to 20 V, while providing an output of 5 V at a switching frequency of 2.1 MHz. The innovative architecture allows the device to regulate a 3.3 V output from an input voltage of only 3.5 V. All aspects of this product are optimized for the automotive customer. An input voltage range up to 36 V, with transient tolerance up to 42 V, eases input surge protection design. An open drain reset output, with filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transition between PWM and PFM modes, along with a no-load operating current of only 24 µA, ensures high efficiency and superior transient response at all loads.

Features

  • The LM53603-Q1, LM53602-Q1 are available as
    AEC-Q1-Qualified Automotive Grade Products
    With Following Results:
    • Device Temperature Grade 1: –40°C to +125°C
      Ambient Operating Range
    • Device HBM ESD Classification Level 1C
    • Device CDM ESD Classification Level C4B
  • 3 A or 2 A maximum load current
  • Input Voltage Range from 3.5 V to 36 V:
    Transients to 42 V
  • Output Voltage Options: 5 V, 3.3 V, ADJ
  • 2.1 MHz Fixed Switching Frequency
  • ±2% Output Voltage Tolerance
  • –40°C to 150°C Junction Temperature Range
  • 1.7 µA Shutdown Current (typical)
  • 24 µA Input Supply Current at No Load (typical)
  • No external Feed-back Divider Required for 5 V or
    3.3 V output
  • Reset Output With Filter and Delay
  • Automatic Light Load Mode for Improved
    Efficiency
  • User-Selectable Forced PWM mode (FPWM)
  • Built-in Loop Compensation, Soft-start, Current
    Limit, Thermal Shutdown, UVLO, and External
    Frequency Synchronization
  • Thermally Enhanced 16-lead Package:
    5 mm × 4.4 mm × 1 mm

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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
LM53603-Q1 LM53600-Q1 LM53601-Q1 LM53602-Q1 LM53625-Q1 LM53635-Q1 LMS3635-Q1 LMS3655-Q1
3.5    3.5    3.5    3.5    3.5    3.5    3.5    3.5   
42    42    42    42    42    42    42    42   
3.2    3.3    3.2    3.2    3.2    3.2    1    1   
9.9    9.9    6    9.9    10    10    15    15   
3    0.65    1    2    2.5    3.5    3.5    5.5   
1    1    1    1    1    1    1    1   
1850    1890    1890    1850    1850    1850    250    250   
2350    2400    2400    2350    2350    2350    500    500   
0.023    0.023    0.023    0.023    0.018    0.018    0.015    0.015   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification   
Spread Spectrum
Synchronous Rectification   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package   
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    Current Mode   
98    98    98    98    98    98    98    98   
-40 to 150    -40 to 150    -40 to 150    -40 to 150    -40 to 150    -40 to 150    -40 to 150    -40 to 150   
Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive   
HTSSOP    WSON    WSON    HTSSOP    VQFN-HR    VQFN-HR    VQFN-HR    VQFN-HR   

Other qualified versions of LM53603-Q1

Version Part Number Definition
Catalog LM53603 TI's standard catalog product

WEBENCH® Designer LM53603A-Q1

  Min   Max Range
Vin  V 3.50 to 36.0V
Product Option
Vout  V 3.3 to 10.0V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 150°C