LM53600-Q1 3.5V to 36V, 650mA Synchronous 2.1MHz Step-Down Converter for Automotive Applications | TI.com

LM53600-Q1 (ACTIVE) 3.5V to 36V, 650mA Synchronous 2.1MHz Step-Down Converter for Automotive Applications



The LM53600-Q1 and LM53601-Q1 synchronous buck regulator devices are optimized for automotive applications, providing an output voltage of 5 V, 3.3 V, or an adjustable output. Load current up to 650 mA is supported by the LM53600-Q1, while the LM53601-Q1 supports up to 1000 mA. Advanced high-speed circuitry allows the LM53600-Q1 and LM53601-Q1 devices to regulate from an input of 18 V to an output of 3.3 V at a fixed frequency of 2.1 MHz. Innovative architecture allows the device to regulate a 3.3-V output from an input voltage of only 3.8 V. The input voltage range up to 36 V, with transient tolerance of up to 42 V, eases input surge protection design. An open drain reset output, with filtering and delayed release, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transitions between PWM and PFM modes, along with a quiescent current of only 23 µA, ensures high efficiency and superior transient response at all loads. Few external components are needed allowing the generation of compact PCB layout. While the LM53600-Q1 and LM53601-Q1 devices are Q1 rated, electrical characteristics are guaranteed across a junction temperature range of –40°C up to 150°C.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM Classification Level 2
    • Device CDM Classification Level C5
  • –40°C to 150°C Junction Temperature Range
  • Wide Operating Input Voltage: 3.55 V to 36 V
    (With Transient to 42 V)
  • Spread Spectrum Option Available
  • 2.1-MHz Fixed Switching Frequency
  • Low Quiescent Current: 23 µA
  • Shutdown Current: 1.8 µA
  • Adjustable, 3.3-V, or 5-V Output
  • Maximum Current Load: 650 mA for LM53600-Q1,
    1000 mA for LM53601-Q1
  • Pin Selectable Forced PWM Mode
  • RESET Output with Filter and Delay Release
  • External Frequency Synchronization
  • Internal Compensation, Soft Start, Current Limit,
    and UVLO
  • 10-Lead, 3-mm × 3-mm SON Package with
    Wettable Flanks

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Part Number
  Min   Max Range
Vin  V
Vout  V
Iout  A
Ambient Temp  °C -40 to 150°C


Compare all products in Buck converters (integrated switch) Email Download to Excel
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)
LM53600-Q1 Order now 3.5     42     3.3     9.9     0.65     1     1890     2400     0.023     Enable
Fixed Output
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Spread Spectrum
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     Automotive     WSON | 10     Converter     10WSON: 9 mm2: 3 x 3 (WSON | 10)