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LM51521-Q1

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

Product details

Topology Boost Vin (min) (V) 3.8 Vin (max) (V) 42 Vout (min) (V) 5 Vout (max) (V) 20 Regulated outputs (#) 1 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2200 Iq (typ) (mA) 0.011 Features Adjustable current limit, Enable, Frequency synchronization, Hiccup mode protection, Light Load Efficiency, Spread Spectrum, Synchronization, Synchronous Rectification, Tracking, UVLO adjustable Duty cycle (max) (%) 94 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 150 Type Controller
Topology Boost Vin (min) (V) 3.8 Vin (max) (V) 42 Vout (min) (V) 5 Vout (max) (V) 20 Regulated outputs (#) 1 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2200 Iq (typ) (mA) 0.011 Features Adjustable current limit, Enable, Frequency synchronization, Hiccup mode protection, Light Load Efficiency, Spread Spectrum, Synchronization, Synchronous Rectification, Tracking, UVLO adjustable Duty cycle (max) (%) 94 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 150 Type Controller
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
Boost controllers (external switch)
LM51521-Q1 Automotive 2.2-MHz wide VIN low IQ synchronous boost controller with disabled bypass mode
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 (...)
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 Download
VQFN (RGR) 20 View options

Ordering & quality

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