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Maxim > Products > [Power and Battery Management]  [Automotive] 
MAX5092, MAX5093
4V to 72V Input LDOs with Boost Preregulator

Automotive LDOs with Boost Preregulators Operate Seamlessly from 4V Cold Crank to 72V Load Dump


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 480kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX5092A/MAX5092B/MAX5093A/MAX5093B low-quiescent-current, low-dropout (LDO) regulators contain simple boost preregulators operating at a high frequency. The devices seamlessly provide a preset 3.3V (MAX5092A/MAX5093A) or 5V (MAX5092B/MAX5093B) LDO output voltage from an automotive cold-crank through load-dump (3.5V to 80V) input voltage conditions. The MAX5092_/MAX5093_ deliver up to 250mA with excellent load and line regulation. During normal operation, when the battery is healthy, the boost preregulator is completely turned off, reducing quiescent current to 65µA (typ). This makes the devices suitable for always-on power supplies.

The buck-boost operation achieved by this combination of LDO and boost preregulator offers the advantage of using a single off-the-shelf inductor in place of the multiple- winding custom magnetics needed in typical single- ended primary inductor converter (SEPIC) and transformer-based flyback topologies. The high operating frequency of the boost regulator significantly reduces component size. The MAX5092_ integrates a blocking diode to further reduce the external component count. The boost preregulator output voltage is preset to 7V. Both LDO and boost output voltages are programmable using external resistors. The boost preregulator output voltage is adjustable up to 11V (MAX5092_), or up to 12V (MAX5093_). The LDO output voltage is adjustable from 1.5V to 9V (MAX5092_) or from 1.5V to 10V (MAX5093_).

The devices feature a shutdown mode with 5µA (typ) shutdown current, a active-low HOLD input to implement a self-holding circuit, and a power-on-reset output (active-low RESET) with an externally programmable timeout period. Additional features include output overload, short-circuit, and thermal protection.

The MAX5092_/MAX5093_ are available in a thermally enhanced, 16-pin 5mm x 5mm thin QFN package and can dissipate up to 2.7W at +70°C on a multilayer PC board.

An evaluation kit is available:  MAX5092EVKIT  

Key Features   Applications/Uses
  • Wide Operating Input Voltage Range: 3.5V to 72V with a 4V Startup Voltage
  • LDO Output Regulates to 5V Seamlessly from an Input Voltage of 3.5V to 72V
  • Up to 250mA Output Current
  • Preset 3.3V, 5V, or Externally Programmable LDO Output Voltage from 1.5V to 9V (MAX5092_) or from 1.5V to 10V (MAX5093_)
  • Preset 7V or Externally Programmable Boost Output Voltage Up to 11V (MAX5092_) or Up to 12V (MAX5093_)
  • 65µA Quiescent Current in LDO Mode (VIN ≥ 8V)
  • 5µA Shutdown Current
  • Power-On Reset (Active-Low RESET) with Programmable Timeout Period
  • Output Short-Circuit and Thermal Protection
  • TQFN Package Capable of Dissipating up to 2.7W at +70°C

 
  		• Automotive: Body Electronics
  		• Automotive: ECU
  		• Industrial

    Key Specifications:  Linear Regulators
    Part Number Regulators VIN
    (V)    		 VIN
    (V)    		 Preset VOUT
    (V)    		 Adj. VOUT
    (V)    		 Adj. VOUT
    (V)    		 VDROPOUT @Rated ILOAD
    (V)    		 Rated ILOAD
    (mA)    		 ICC
    (µA)    		 Low Batt./ Pwr. Fail Out POK/Reset Thresh.
    (V)    		 Watchdog Reverse Batt. Protect. Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    min max min max typ max nom max w/pins See Notes
    MAX5092  1 3.5 72
    3.3
    5
    		 1.5 9 0.9 250 85 No Vout-10% No No
    TQFN/16
    		 26 -40 to +125 $1.56 @1k
    MAX5093  10
    TQFN/16
    		 $1.56 @1k
    See All Linear Regulators (153)

    Key Specifications:  Step-Up/Down Switching Regulators
    Part Number VIN
    (V)    		 VIN
    (V)    		 VOUT
    (V)    		 VOUT
    (V)    		 Preset VOUT
    (V)    		 Max. IOUT
    (A)    		 Max. IOUT
    (A)    		 Output Adjust. Method DC-DC Outputs Package/Pins Smallest Available Pckg.
    (mm2)    		 Price
    min max min max ≥ ≤ max w/pins See Notes
    MAX5092  3.5 72 1.5 9
    3.3
    5
    		 0.25 0.25
    Preset
    Resistor
    		 1
    TQFN/16
    		 26 $1.56 @1k
    MAX5093  10
    TQFN/16
    		 $1.56 @1k
    See All Step-Up/Down Switching Regulators (9)

    Diagram
    MAX5092, MAX5093: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  		• MAX5092EVKIT

    Design Guides
  		• Automotive (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-8 of 8

    MAX5092 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5092AATE+  
    		Active TQFN;16 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0073 (PDF)
    Use pkgcode/variation: T1655+3*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5092AATE+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX5092BATE+  
    		Active TQFN;16 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0073 (PDF)
    Use pkgcode/variation: T1655+3*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5092BATE+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX5093 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5093AATE+  
    		Active TQFN;16 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0073 (PDF)
    Use pkgcode/variation: T1655+3*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5093AATE+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX5093BATE+  
    		Active TQFN;16 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0073 (PDF)
    Use pkgcode/variation: T1655+3*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5093BATE+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet

    More Information
  		• New Product Press Release 2007-01-15 

    Related Products
    MAX5086 45V, 250mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay
    MAX5087 45V, 400mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay
    MAX5091 28V, 100mA, Low-Quiescent-Current LDO with Reset and Power-Fail Input/Output
    MAX5023, MAX5024 65V, Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer
    MAX5084, MAX5085 65V, 200mA, Low-Quiescent-Current Linear Regulators in TDFN

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    Document Ref.: 19-0659; Rev 1; 2008-02-08
    This page last modified: 2008-02-11


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