MAX1932

Digitally Controlled, 0.5% Accurate, Safest APD Bias Supply


Please check latest availability status for a specific part variant.

Description

The MAX1932 generates a low-noise, high-voltage output to bias avalanche photodiodes (APDs) in optical receivers. Very low output ripple and noise is achieved by a constant-frequency, pulse-width modulated (PWM) boost topology combined with a unique architecture that maintains regulation with an optional RC or LC post filter inside its feedback loop. A precision reference and error amplifier maintain 0.5% output voltage accuracy.

The MAX1932 protects expensive APDs against adverse operating conditions while providing optimal bias. Traditional boost converters measure switch current for protection, whereas the MAX1932 integrates accurate high-side current limiting to protect APDs under avalanche conditions. A current-limit flag allows easy calibration of the APD operating point by indicating the precise point of avalanche breakdown. The MAX1932 control scheme prevents output overshoot and undershoot to provide safe APD operation without data loss.

The output voltage can be accurately set with either external resistors, an internal 8-bit DAC, an external DAC, or other voltage source. Output span and offset are independently settable with external resistors. This optimizes the utilization of DAC resolution for applications that may require limited output voltage range, such as 4.5V to 15V, 4.5V to 45V, 20V to 60V, or 40V to 90V.
MAX1932: Typical Application Circuit MAX1932: Typical Application Circuit Enlarge+

Key Features

  • Unique Architecture Delivers Excellent Accuracy for Improved System Performance
    • 0.5% Accurate Output
    • Low Ripple Output (< 1mV)
  • Protection Features Guarantee Safe Operation
    • Accurate High-Side Current Limit
    • Avalanche Indicator Flag
  • Output-Voltage Flexibility Facilitates Multiple Applications and Design Approaches
    • 4.5V to 90V Output
    • Set Output Voltage via 8-Bit SPI-Compatible Internal DAC, External DAC, or External Resistors
  • Small Circuit Footprint Reduces Equipment Size
    • 12-Pin, 4mm x 4mm Thin QFN Package
    • Circuit Height < 2mm
  • Commonly Available 2.7V to 5.5V Input Voltage Range

Applications/Uses

  • Fiber Optic Network Equipment
  • Laser Range Finders
  • Optical Receivers and Modules
  • PIN Diode Bias Supply
  • Telecom Equipment
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX1932 2.75.54.5900.01
Digital
Resistor
Voltage
External0.525651300
TQFN/12
$5.25 @1k
See All Step-Up Switching Regulators (97)
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.


MAX1932EVKIT: MAX1932 Evaluation Kit

CAD Symbols and Footprints

  • MAX1932ETC
  • MAX1932ETC+
  • MAX1932ETC+T
  • MAX1932ETC-T
  • MAX1932ETC/GG8
  • MAX1932ETC/GG8-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:

    Related Resources


    MAX20049
    Flexible, Compact Quad Power Supply with 2.2MHz, 500mA Buck Converters and Dual LDOs for Automotive Camera Modules

    • Small Solution Size
    • EMI Solutions
    • Self-Protected and Robust

    MAX17673
    Integrated 4.5V to 60V Synchronous 1.5A HV Buck and Dual 2.7V to 5.5V, 1A Buck Regulators

    • Reduces External Components and Total Cost
    • Integrates Three DC-DC Regulators
    • Reduces Power Dissipation

    MAX77813
    High-Efficiency Buck-Boost Converter

    • VIN Range: 2.30V to 5.5V
    • VOUT Range: 2.60V to 5.14V (I2C Programmable in 20mV Step)
    • Up to 2A Output Current in Boost Mode (VIN = 3.0V, VOUT = 3.4V, ILIM = High)

    MAX38643
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38641
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38642
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38640A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX5995A
    IEEE 802.3bt-Compliant, Powered Device Interface Controllers with Integrated 91W High-Power MOSFET

    • IEEE 802.3af/at/bt Compliant
    • Type 1~4 PSE Classification Indicator or an External Wall Adapter Indicator Output
    • Simplified Wall Adapter Interface

    MAX5995B
    IEEE 802.3bt-Compliant, Powered Device Interface Controllers with Integrated 91W High-Power MOSFET

    • IEEE 802.3af/at/bt Compliant
    • Type 1~4 PSE Classification Indicator or an External Wall Adapter Indicator Output
    • Simplified Wall Adapter Interface

    MAX5995C
    IEEE 802.3bt-Compliant, Powered Device Interface Controllers with Integrated 91W High-Power MOSFET

    • IEEE 802.3af/at/bt Compliant
    • Type 1~4 PSE Classification Indicator or an External Wall Adapter Indicator Output
    • Simplified Wall Adapter Interface

    MAX38903A
    1.7V–5.5VIN, 1A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX38903B
    1.7V–5.5VIN, 1A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX38903C
    1.7V–5.5VIN, 1A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX38903D
    1.7V–5.5VIN, 1A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX20004
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20008
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20006
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20077
    36V, 2.5A Mini Buck Converter with 3.5uA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAX25277
    36V, 2.5A Mini Buck Converter with 3.5uA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAX77503
    14V Input, 1.5A High-Efficiency Buck Converter with 9μA IQ

    • 1.5A Single Channel Buck Regulator
    • 3V to 14V Input Voltage Range
    • 0.8V to 99%VSUP Output Voltage Range

    MAX17270
    nanoPower Triple/Dual-Output, Single-Inductor, Multiple-Output (SIMO) Buck-Boost Regulator

    • 3-Output/2-Output, Single-Inductor, Multiple-Output (SIMO) Buck-Boost Regulator
    • 2.7V to 5.5V Input Voltage Range
    • Low-Power and Long Battery Life

    MAX17271
    nanoPower Triple/Dual-Output, Single-Inductor, Multiple-Output (SIMO) Buck-Boost Regulator

    • 3-Output/2-Output, Single-Inductor, Multiple-Output (SIMO) Buck-Boost Regulator
    • 2.7V to 5.5V Input Voltage Range
    • Low-Power and Long Battery Life

    MAXM17900
    4V to 24V, 100mA, Compact Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17552
    4V to 60V, 100mA, Compact Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAX38888
    2.5V–5.0V, 0.5A/2.5A Reversible Buck/Boost Regulator for Backup Power Applications

    • 2.5V to 5V System Output Voltage
    • 0.8V to 4.5V Cap Voltage Range
    • Up to 2.5A Peak Inductor Discharge Current

    MAX17250
    2.7V to 18V Input, Boost Converter with 0.1uA True Shutdown, Short Circuit Protection and Selectable Input Current Limit

    • Input Voltage Range 2.7V to 18V
    • Output Voltage Range 3V to 18V, > VIN
    • Integrated Power FETs

    Type ID Title
    Reference Circuit3926HFRD-22.3: Modular GPON (MOGPON) ONT
    Evaluation Board3690MAX1932EVKIT MAX1932 Evaluation Kit