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

LM53603-Q1 (ACTIVE)

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

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

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 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
LM53603-Q1 LM53600-Q1 LM53601-Q1 LM53602-Q1 LM53625-Q1 LMS3635-Q1 LMS3655-Q1
3.5     3.5     3.5     3.5     3.5     3.5     3.5    
42     42     42     42     42     42     42    
3.2     3.3     3.2     3.2     3.2     1     1    
9.9     9.9     6     9.9     10     15     15    
3     0.65     1     2     2.5     3.5     5.5    
1     1     1     1     1     1     1    
1850     1890     1890     1850     1850     250     250    
2350     2400     2400     2350     2350     500     500    
0.023     0.023     0.023     0.023     0.018     0.015     0.015    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification    
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
Synchronous Rectification    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification    
Spread Spectrum
Synchronous Rectification    
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    
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    
Automotive     Automotive     Automotive     Automotive     Automotive     Automotive     Automotive    
HTSSOP | 16     WSON | 10     WSON | 10     HTSSOP | 16     VQFN-HR | 22     VQFN-HR | 22     VQFN-HR | 22    
Converter     Converter     Converter     Converter     Converter     Converter     Converter    

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