Product details

Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 36 Iq (Typ) (uA) 9.5 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2200 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Load Disconnect, Phase Interleaving, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Adjustable Operating temperature range (C) -40 to 150 Regulated outputs (#) 1 TI functional safety category Functional Safety-Capable Number of phases 2 Rating Automotive
Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 36 Iq (Typ) (uA) 9.5 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2200 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Load Disconnect, Phase Interleaving, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Adjustable Operating temperature range (C) -40 to 150 Regulated outputs (#) 1 TI functional safety category Functional Safety-Capable Number of phases 2 Rating Automotive
VQFN (RGY) 24
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Integrated EMI mitigation
    • Selectable dual random spread spectrum (DRSS) feature for enhanced EMI performance across low and high-frequency bands
    • Optimized for CISPR 25 Class 5 requirements
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 42 V
    • 1% accurate, fixed 3.3-V, 5-V, 12-V, or adjustable outputs from 0.8 V to 36 V
    • 150°C maximum junction temperature
    • Lossless DCR or shunt current sensing
    • Shutdown mode current: 2.2 µA
    • No-load standby current: 9 µA
  • Switching frequency from 100 kHz to 2.2 MHz
    • SYNC in and SYNC out capability
    • Selectable PFM or FPWM modes
  • Inherent protection features for robust design
    • Internal hiccup mode overcurrent protection
    • ENABLE and PGOOD functions
    • VCC, VDDA, and gate-drive UVLO protection
    • Internal or external loop compensation
    • Thermal shutdown protection with hysteresis
  • Create a custom design using the LM25148-Q1 with WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Integrated EMI mitigation
    • Selectable dual random spread spectrum (DRSS) feature for enhanced EMI performance across low and high-frequency bands
    • Optimized for CISPR 25 Class 5 requirements
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 42 V
    • 1% accurate, fixed 3.3-V, 5-V, 12-V, or adjustable outputs from 0.8 V to 36 V
    • 150°C maximum junction temperature
    • Lossless DCR or shunt current sensing
    • Shutdown mode current: 2.2 µA
    • No-load standby current: 9 µA
  • Switching frequency from 100 kHz to 2.2 MHz
    • SYNC in and SYNC out capability
    • Selectable PFM or FPWM modes
  • Inherent protection features for robust design
    • Internal hiccup mode overcurrent protection
    • ENABLE and PGOOD functions
    • VCC, VDDA, and gate-drive UVLO protection
    • Internal or external loop compensation
    • Thermal shutdown protection with hysteresis
  • Create a custom design using the LM25148-Q1 with WEBENCH Power Designer

The LM25148-Q1 is a 42-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak-current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25148-Q1 can be set up in interleaved mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM25148-Q1 has a unique EMI reduction feature known as Dual Random Spread Spectrum (DRSS). Combining low-frequency triangular and high-frequency randomized modulations mitigates EMI across lower and higher radio-frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

The LM25148-Q1 is a 42-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak-current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25148-Q1 can be set up in interleaved mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM25148-Q1 has a unique EMI reduction feature known as Dual Random Spread Spectrum (DRSS). Combining low-frequency triangular and high-frequency randomized modulations mitigates EMI across lower and higher radio-frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

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Technical documentation

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Type Title Date
* Data sheet LM25148-Q1 42-V Automotive Synchronous Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum datasheet 28 Jun 2021
Functional safety information LM25148-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 28 Sep 2021
User guide LM25149-Q1 EVM User's Guide 18 Mar 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module

The LM25149-Q1EVM-2100 high-density evaluation module (EVM) is designed to showcase the performance of the LM25149-Q1 high-performance, automotive synchronous buck DC/DC buck controller. It operates over a wide input voltage range of 5.5 V to 36 V to deliver a fixed 5-V output with better than 1% (...)
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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 (...)
Calculation tool

LM5148-LM25148DESIGN-CALC — LM5148 and LM25148 controller quickstart design tool

Welcome to the quickstart design tool for the LM5148, LM5148-Q1, LM25148 and LM25148-Q1. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the above controller family. As such, the user can expeditiously arrive at an (...)
PCB layout

LM25149-Q1EVM-2100 PCB Layout Files

SNVR501.ZIP (1990 KB)
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VQFN (RGY) 24 View options

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