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NEW LMR33630AP-Q1 ACTIVE Automotive 3.8-V to 36-V, 3-A synchronous step-down voltage converter Lower output current

Product details

Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 3.2 Vout (Max) (V) 10 Iout (Max) (A) 2.5 Iq (Typ) (uA) 18 Switching frequency (Min) (kHz) 1850 Switching frequency (Max) (kHz) 2350 Features Enable, Fixed Output, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1
Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 3.2 Vout (Max) (V) 10 Iout (Max) (A) 2.5 Iq (Typ) (uA) 18 Switching frequency (Min) (kHz) 1850 Switching frequency (Max) (kHz) 2350 Features Enable, Fixed Output, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1
VQFN-HR (RNL) 22 20 mm² 4 x 5
  • AEC-Q100 automotive qualified:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM classification level 2
    • Device CDM classification level C6
  • –40°C to +150°C junction temperature range
  • 15-µA quiescent urrent at no load (typical) with 3.3-V output
  • 5.0-mm × 4.0-mm VQFN package with or without wettable flanks and 0.6-mm VIN spacing
  • Low EMI and switch noise
  • Spread spectrum option
  • External frequency synchronization
  • RESET output with internal filter and 3-ms release timer
  • Pin-selectable forced PWM mode
  • Built-in compensation, soft start, current limit, thermal shutdown, and UVLO
  • 0.6-V dropout at 3.5 A at 105°C TA
  • ±1% output voltage tolerance (–40°C to 125°C TJ)
  • Available with fixed 5-V, 3.3-V or adjustable output
  • AEC-Q100 automotive qualified:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM classification level 2
    • Device CDM classification level C6
  • –40°C to +150°C junction temperature range
  • 15-µA quiescent urrent at no load (typical) with 3.3-V output
  • 5.0-mm × 4.0-mm VQFN package with or without wettable flanks and 0.6-mm VIN spacing
  • Low EMI and switch noise
  • Spread spectrum option
  • External frequency synchronization
  • RESET output with internal filter and 3-ms release timer
  • Pin-selectable forced PWM mode
  • Built-in compensation, soft start, current limit, thermal shutdown, and UVLO
  • 0.6-V dropout at 3.5 A at 105°C TA
  • ±1% output voltage tolerance (–40°C to 125°C TJ)
  • Available with fixed 5-V, 3.3-V or adjustable output

The LM53625-Q1/LM53635-Q1 synchronous buck regulator is optimized for automotive applications, providing an output voltage of 5 V, 3.3 V, or an adjustable output. Advanced high-speed circuitry allows the LM53625-Q1/LM53635-Q1 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 this device to regulate a 3.3-V output from an input voltage of only 3.55 V. All aspects of the LM53625-Q1/LM53635-Q1 are optimized for automotive and performance-driven industrial customers. An input voltage range up to 36 V, with transient tolerance up to 42 V, eases input surge protection design. The automotive-qualified Hotrod QFN package with wettable flanks reduces parasitic inductance and resistance while increasing efficiency, minimizing switch node ringing, and dramatically lowering electromagnetic interference (EMI). An open-drain reset output, with built-in 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 and low quiescent current (only 15 µA for the 3.3 V option) ensure high efficiency and superior transient responses at all loads.

The LM53625-Q1/LM53635-Q1 synchronous buck regulator is optimized for automotive applications, providing an output voltage of 5 V, 3.3 V, or an adjustable output. Advanced high-speed circuitry allows the LM53625-Q1/LM53635-Q1 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 this device to regulate a 3.3-V output from an input voltage of only 3.55 V. All aspects of the LM53625-Q1/LM53635-Q1 are optimized for automotive and performance-driven industrial customers. An input voltage range up to 36 V, with transient tolerance up to 42 V, eases input surge protection design. The automotive-qualified Hotrod QFN package with wettable flanks reduces parasitic inductance and resistance while increasing efficiency, minimizing switch node ringing, and dramatically lowering electromagnetic interference (EMI). An open-drain reset output, with built-in 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 and low quiescent current (only 15 µA for the 3.3 V option) ensure high efficiency and superior transient responses at all loads.

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Technical documentation

Design & development

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Evaluation board

LM536253QEVM — LM536253-Q1 2.5A 3.3V Fixed Output Wide Vin Synchronous 2.1MHz Automotive Step-Down Converter EVM

This EVM demonstrates the capabilities of the LM536253 automotive integrated buck converter. The EVM has an EMI filter on the back side that assists with noise reduction. The user can choose to bypass that EMI filter using  VIN1/GND1 posts . The EVM operates from an 3.5V to 36V input (up to (...)
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Simulation model

LM536253-Q1 PSpice Transient Model

SNVMAN5.ZIP (120 KB) - PSpice Model
Simulation model

LM536253-Q1 Unencrypted PSpice Transient Model

SNVMAN6.ZIP (8 KB) - PSpice Model
Simulation model

LM536255-Q1 PSpice Transient Model

SNVMAN7.ZIP (117 KB) - PSpice Model
Simulation model

LM536255-Q1 Unencrypted PSpice Transient Model

SNVMAN8.ZIP (7 KB) - PSpice Model
Simulation model

LM53625A-Q1 PSpice Transient Model

SNVMAO1.ZIP (120 KB) - PSpice Model
Simulation model

LM53625A-Q1 Unencrypted PSpice Transient Model

SNVMAO2.ZIP (8 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
参考设计

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参考设计

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