MAX5097

40V, 600mA Buck Converters with Low-Quiescent-Current Linear Regulator Mode

Industry's First Automotive Buck Converter with Low IQ LDO Mode Operates Seamlessly from 4V Cold Crank to 40V Input


Please check latest availability status for a specific part variant.

Description

The MAX5096/MAX5097 easy-to-use, Dual Mode™, DC-DC converters operate as LDO (low dropout) or switch-mode buck converters. At a high output load, the converters operate as high-efficiency pulse-width-modulated (PWM) switch-mode converters and reduce the power dissipation. The devices switch to a low-quiescent-current (IQ) LDO mode of operation at light load. During the key-off condition, the system's microcontroller drives the LDO/active-low BUCK input on the fly and forces the MAX5096/MAX5097 into LDO Mode, thereby reducing the quiescent current significantly.

In Buck Mode, the MAX5096/MAX5097 operate from a 5V to 40V input voltage range and deliver up to 600mA of load current with excellent load and line regulation. The fixed-switching frequency versions of 135kHz and 330kHz are available. The MAX5096/MAX5097 DC-DC internal oscillator can be synchronized to an external clock. External compensation and a current-mode control scheme make it easy to design with.

In LDO Mode, the MAX5096/MAX5097 operate from a 4V to 40V input voltage. The LDO Mode operation is intended for a lower output load current of up to 100mA. The quiescent current at 100µA load in LDO Mode is only 41µA (typ).

The MAX5096/MAX5097 feature an enable input that shuts down the device, reducing the current consumption to 6µA (typ). Additional features include a power-on reset output with a capacitor-adjustable timeout period, programmable soft-start, output tracking, output overload, short-circuit and thermal shutdown protections.

The MAX5096/MAX5097 operate over the -40°C to +125°C automotive temperature range and are available in thermally enhanced 20-pin TSSOP or 16-pin TQFN packages.

MAX5096, MAX5097: Simplified Diagram MAX5096, MAX5097: Simplified Diagram Enlarge+

Key Features

  • High-Efficiency Switcher Mode (Buck Mode) or Low-Quiescent-Current Linear Regulator (LDO Mode) Operation
  • Wide Operating Input Voltage Range
    • +5V to +40V Buck Mode
    • +4V to +40V LDO Mode
  • Fixed 3.3V or 5V and Adjustable (1.24V to 11V) Output Voltage Versions
  • 6µA (typ) Shutdown Current
  • Fixed 135kHz or 330kHz Switching Frequency
  • External Frequency Synchronization
  • Programmable Soft-Start
  • Integrated Microprocessor Reset (Active-Low RESET) Circuit with Programmable Timeout Period
  • Thermal and Short-Circuit Protection
  • -40°C to +125°C Automotive Temperature Range
  • Thermally-Enhanced Package Dissipates
    • 2.6W at TA = +70°C (16-Pin TQFN)
    • 1.7W at TA = +70°C (20-Pin TSSOP)

Applications/Uses

  • Home Security/Safety
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX5096 4401.2511
3.3
5
Preset
Resistor
0.6Internal1135
TQFN/16
TSSOP/20
$3.09 @1k
MAX5097 330
TQFN/16
TSSOP/20
$3.20 @1k
See All Step-Down Switching Regulators (367)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX5097AEVKIT: MAX5097A Evaluation Kit

Quality and Environmental Data

Product Reliability Reports: MAX5097.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX5097AATE+
  • MAX5097AATE+T
  • MAX5097AAUP+
  • MAX5097AAUP+T
  • MAX5097BATE+
  • MAX5097BATE+T
  • MAX5097BATE/V+
  • MAX5097BATE/V+T
  • MAX5097BAUP+
  • MAX5097BAUP+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

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    Type ID Title
    Evaluation Board5381MAX5097AEVKIT MAX5097A Evaluation Kit