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LM51521-Q1

ACTIVE

Automotive 2.2-MHz wide VIN low IQ synchronous boost controller with disabled bypass mode

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Data sheet

LM51521-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Boost Vin (max) (V) 42 Vin (min) (V) 3.8 Vout (max) (V) 20 Vout (min) (V) 5 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Hiccup mode protection, Light-load efficiency, Spread Spectrum, Synchronous rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 11 Duty cycle (max) (%) 94 TI functional safety category Functional Safety-Capable EMI features Frequency Dithering, Spread Spectrum
Rating Automotive Topology Boost Vin (max) (V) 42 Vin (min) (V) 3.8 Vout (max) (V) 20 Vout (min) (V) 5 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Hiccup mode protection, Light-load efficiency, Spread Spectrum, Synchronous rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 11 Duty cycle (max) (%) 94 TI functional safety category Functional Safety-Capable EMI features Frequency Dithering, Spread Spectrum
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Suited for wide operating range automotive battery powered applications
    • 3.8-V to 42-V input operating range
    • Dynamically programmable VOUT from 5 V to 20 V (protection up to 57 V)
    • Minimum boost input 0.8 V when BIAS ≥ 3.8 V
    • Bypass operation when VSUPPLY > VLOAD (LM5152 only, see the device comparison table)
  • Minimized battery drain
    • Shutdown current ≤ 3 µA
    • Automatic mode transition
    • Battery drain in deep sleep ≤ 11 µA (bypass operation, charge pump off)
    • Battery drain in deep sleep ≤ 33 µA (bypass operation, charge pump on)
    • BIAS IQ in sleep ≤ 13 µA (skip mode)
    • Strong 5-V MOSFET drivers
  • Small solution size and low cost
    • 2.2-MHz maximum switching frequency
    • Internal boot diode
    • Constant peak current limit over VIN
    • Supports DCR inductor current sensing
    • QFN-20 with wettable flanks
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • 100-kHz to 2.2-MHz switching frequency
    • Selectable switching mode (FPWM, diode emulation, skip mode)
  • EMI mitigation
    • Optional programmable spread spectrum
    • Lead-less package
  • Programmability and flexibility
    • Dynamic VOUT tracking
    • Dynamic switching frequency programming
    • Programmable line UVLO
    • Adjustable soft start
    • Adaptive dead time
    • Boost STATUS indicator
  • Integrated protection features
    • Cycle-by-cycle peak current limit
    • Overvoltage protection
    • HB-SW short protection
    • Thermal shutdown
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Suited for wide operating range automotive battery powered applications
    • 3.8-V to 42-V input operating range
    • Dynamically programmable VOUT from 5 V to 20 V (protection up to 57 V)
    • Minimum boost input 0.8 V when BIAS ≥ 3.8 V
    • Bypass operation when VSUPPLY > VLOAD (LM5152 only, see the device comparison table)
  • Minimized battery drain
    • Shutdown current ≤ 3 µA
    • Automatic mode transition
    • Battery drain in deep sleep ≤ 11 µA (bypass operation, charge pump off)
    • Battery drain in deep sleep ≤ 33 µA (bypass operation, charge pump on)
    • BIAS IQ in sleep ≤ 13 µA (skip mode)
    • Strong 5-V MOSFET drivers
  • Small solution size and low cost
    • 2.2-MHz maximum switching frequency
    • Internal boot diode
    • Constant peak current limit over VIN
    • Supports DCR inductor current sensing
    • QFN-20 with wettable flanks
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • 100-kHz to 2.2-MHz switching frequency
    • Selectable switching mode (FPWM, diode emulation, skip mode)
  • EMI mitigation
    • Optional programmable spread spectrum
    • Lead-less package
  • Programmability and flexibility
    • Dynamic VOUT tracking
    • Dynamic switching frequency programming
    • Programmable line UVLO
    • Adjustable soft start
    • Adaptive dead time
    • Boost STATUS indicator
  • Integrated protection features
    • Cycle-by-cycle peak current limit
    • Overvoltage protection
    • HB-SW short protection
    • Thermal shutdown

The LM5152x-Q1 (LM5152-Q1 and LM51521-Q1) device is a wide input range synchronous boost controller that employs peak current mode control.

The LM5152x-Q1 (LM5152-Q1 and LM51521-Q1) device is a wide input range synchronous boost controller that employs peak current mode control.

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Technical documentation

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Type Title Date
* Data sheet LM5152x-Q1 Automotive Low-IQ Synchronous Boost Controller for Start-Stop/Backup Battery Power Supply datasheet (Rev. A) PDF | HTML 14 Apr 2022
Functional safety information LM5152x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 30 Mar 2022

Design & development

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

Evaluation board

LM5152EVM-BST — LM5152 evaluation module for boost controller

The LM5152EVM-BST evaluation module (EVM) showcases the features and performance of the LM5152-Q1 wide input voltage synchronous boost controller, including:

  • Low IQ operation
  • Internal feedback resistors
  • Bypass mode operation when VIN is greater than the VOUT regulation target
  • Dynamic output voltage (...)
User guide: PDF | HTML
Not available on TI.com
Calculation tool

SLVRBL6 — LM51521-Q1 Boost Controller Quickstart Design Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
  • LM51521-Q1 — Automotive 2.2-MHz wide VIN low IQ synchronous boost controller with disabled bypass mode
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Reference designs

PMP31011 — 24-W, low-input voltage synchronous boost converter reference design

This reference design uses the LM51521-Q1 boost controller to supply an 8-V, 3-A load and has been optimized to operate from a single-cell supercapacitor at the input. The converter can discharge a supercapacitor as low as 1.0 V to leverage as much stored energy as possible to open a car door in (...)
Test report: PDF
Package Pins CAD symbols, footprints & 3D models
VQFN (RGR) 20 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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Information included:
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