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Analog Devices Inc./Maxim Integrated MAX15031ATE+
- Part No.:
- MAX15031ATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX15031ATE+.pdf
- Description:
- IC REG CONV APD 1OUT 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,792
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Product details
Overview
The MAX15031ATE+ from Maxim Integrated is a 400kHz constant-frequency current-mode PWM boost converter with integrated 80V/1Ω power switch and high-side current monitor, delivering up to 76V output and monitoring APD currents from 500nA to 4mA with ±10% accuracy (500nA–1mA). It operates from 2.7V–11V input, supports avalanche photodiode biasing with ultra-fast (1µs) resistor-adjustable current limiting, and features thermal shutdown at +160°C.
For engineers reviewing the MAX15031ATE+ datasheet, MAX15031ATE+ pinout, MAX15031ATE+ application, or MAX15031ATE+ equivalent, this device is selected for precision high-voltage biasing in fiber-optic receivers where low-noise output, dynamic current monitoring, and transient-robust APD protection are critical design requirements.
Technical Context
The MAX15031ATE+ uses a BiCMOS current-mode PWM controller without traditional error amplifier phase shift, enabling direct-summing cycle-by-cycle regulation of peak inductor current. Its fixed 400kHz switching frequency and discontinuous conduction mode (DCM) operation minimize reverse-recovery noise and simplify EMI filtering.
It integrates dual supply paths: an internal charge pump (with external 10nF CP/CN capacitors) enables 2.7V–5.5V operation, while direct IN-to-PWR connection supports 5.5V–11V input. The current monitor provides 1:10 mirrored MOUT output with >3-decade dynamic range and CLAMP-pin programmable voltage clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.7V to +5.5V (charge-pump enabled) or +5.5V to +11V (direct drive) |
| Output Voltage Range | (VIN + 1V) to 76V - supports wide-range APD/PIN/varactor biasing |
| Switching Frequency | 400kHz fixed - enables predictable noise spectrum and compact RC filtering |
| Internal Power Switch | 80V vertical DMOS, 1Ω typical RON - sustains 76V output with low conduction loss |
| Current Monitor Accuracy | ±10% (500nA–1mA), ±3.5% (1mA–4mA) - enables precise optical power feedback |
| APD Current Limit Response | 1µs - protects avalanche photodiodes against optical transients |
| Shutdown Current | 2µA max - preserves battery life in always-on fiber modules |
| Operating Temperature | −40°C to +125°C - qualified for automotive and industrial optical transceivers |
Pinout & Package
MAX15031ATE+ is housed in a thermally enhanced 4mm × 4mm, 16-pin TQFN-EP package with exposed pad (EP) connected to SGND for improved thermal dissipation. Pin 1 is located at the top-left corner adjacent to the marking dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWR (Pin 1) | Switch driver & charge pump supply | Must be bypassed with ≥1μF ceramic capacitor to PGND; powers high-voltage gate drive |
| CP (Pin 2) | Charge-pump flying capacitor positive | Connect to IN when VIN ≥ 5.5V; otherwise connect to external 10nF capacitor |
| CN (Pin 3) | Charge-pump flying capacitor negative | Leave unconnected when VIN ≥ 5.5V; required for 2.7V–5.5V operation |
| IN (Pin 4) | Main logic & control supply | Bypass with ≥1μF ceramic capacitor; powers all blocks except switch driver and charge pump |
| SGND (Pin 5) | Signal ground reference | Connect directly to local ground plane; tie to PGND at single point near output capacitor return |
| FB (Pin 6) | Feedback regulation input | Sets output voltage via resistive divider; regulates to 1.245V (typ) or CNTRL voltage |
| CNTRL (Pin 7) | External feedback set-point control | Enables dynamic APD voltage adjustment based on MOUT current for temperature compensation |
| ILIM (Pin 8) | Open-drain current-limit flag | Asserts low when APD current exceeds RLIM-programmed threshold - used for fault signaling |
| RLIM (Pin 9) | Current-limit threshold programming | Resistor to SGND sets APD current limit from 1mA to 5mA - enables optical transient protection |
| MOUT (Pin 10) | Current-monitor output | Sources 1/10× IAPD; convert to voltage with resistor to SGND for ADC interfacing |
| CLAMP (Pin 11) | MOUT voltage clamp reference | Defines upper clamp voltage at MOUT as VCLAMP + 0.6V - prevents overvoltage damage |
| APD (Pin 12) | Photodiode cathode current source | Provides bias current to APD cathode; voltage at APD = VBIAS − VDROP (≤1V @ 2mA) |
| BIAS (Pin 13) | Bias voltage input | Connected to boost output (VOUT) - supplies voltage reference for current monitor and APD |
| SHDN (Pin 14) | Active-low shutdown control | Pull low to reduce supply current to 2µA; connect to IN for continuous operation |
| PGND (Pin 15) | Power ground return | Return path for input/output capacitors and LX switch; tie to SGND at single point |
| LX (Pin 16) | Internal switch drain node | Connects to inductor and rectifier diode; minimize trace area to suppress EMI |
Key Features
| Feature | Design Value |
|---|---|
| Constant-frequency PWM architecture | 400kHz fixed switching enables deterministic noise filtering and stable loop response |
| Integrated 80V/1Ω DMOS switch | Eliminates external high-voltage MOSFET and reduces BOM count in APD bias supplies |
| Three-decade current monitor (500nA–4mA) | Supports both low-light detection and high-gain APD operation within single IC |
| Resistor-adjustable APD current limit | 1µs response time protects photodiodes from optical surges without external circuitry |
| Thermal shutdown with hysteresis | +160°C trip with 10°C hysteresis ensures reliable operation under sustained load conditions |
| Soft-start and UVLO protection | 8ms soft-start limits inrush current; 2.5V UVLO prevents malfunction during brownout |
Applications
| Avalanche Photodiode Biasing | PIN Diode Bias Supplies |
|---|---|
Use Scenario: High-sensitivity optical receivers in GPON/FBON modules requiring stable, low-noise bias for single-photon detection. IC Role / Device Role / Timing Role: Provides regulated 40–76V bias to APD cathode while continuously monitoring photocurrent via MOUT for closed-loop gain control. Use Value: Enables real-time temperature-compensated APD voltage adjustment using CNTRL input, maintaining consistent avalanche gain across −40°C to +125°C. |
Use Scenario: RF front-end attenuation control in fiber-to-the-home (FTTH) transceivers using PIN diodes as voltage-variable attenuators. IC Role / Device Role / Timing Role: Generates precise, ripple-free bias voltage (up to 76V) and monitors diode current to ensure linear RF attenuation characteristics. Use Value: Delivers <100µVPP output ripple (measured at APD node) and ±3.5% current monitoring accuracy above 1mA for calibration-critical designs. |
| Low-Noise Varactor Diode Bias | LCD Display Bias |
Use Scenario: Tunable laser diode drivers and RF filters requiring voltage-controlled capacitance with minimal noise injection. IC Role / Device Role / Timing Role: Supplies ultra-low-noise DC bias (VBIAS − VAPD ≤ 1V drop) to varactor anode while rejecting switching artifacts via DCM operation. Use Value: Achieves 380–420kHz switching frequency stability over temperature (±20kHz), ensuring predictable filter tuning without spurious modulation. |
Use Scenario: High-contrast LCD panels in automotive instrument clusters requiring stable high-voltage bias for segment driving. IC Role / Device Role / Timing Role: Generates 20–30V bias from 5V rail with 1% load regulation and 0.2% line regulation for consistent display luminance. Use Value: Maintains ±1% output voltage accuracy over full temperature range and load (0–4.5mA), eliminating contrast drift in wide-temperature environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage boost and current monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX15030ATE+ | No integrated current monitor; lacks MOUT, APD, RLIM, CLAMP pins and APD current-limit functionality | Suitable only for pure boost conversion - cannot replace MAX15031ATE+ in APD biasing with monitoring | Select MAX15031ATE+ when closed-loop photodiode bias control or real-time current telemetry is required |
| LT3482EDD | 60V max output, no current monitor, 1.3MHz switching, different pinout and control architecture | Targeted at general-purpose high-frequency boost; not designed for APD biasing or multi-decade current sensing | Choose MAX15031ATE+ for 76V capability, 500nA–4mA monitoring, and automotive-grade thermal performance |
Compared with MAX15030ATE+, the MAX15031ATE+ adds full APD current monitoring and protection; compared with LT3482EDD, it delivers higher output voltage, lower noise via DCM operation, and integrated optical transient response - making it uniquely suited for fiber-optic receiver biasing.
Availability
MAX15031ATE+ is available at Aetrix Electronics and suitable for avalanche photodiode biasing, PIN diode bias supplies, and LCD display biasing requiring stable component supply across automotive, industrial, and telecom temperature ranges.
Supply support for MAX15031ATE+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding applications.
The MAX15031ATE+ belongs to Maxim's high-voltage bias supply product line, engineered specifically for fiber-optic receiver modules requiring integrated boosting, precision current monitoring, and robust APD protection in compact form factors.
FAQ
What is the maximum output voltage supported by the MAX15031ATE+?
The MAX15031ATE+ supports an output voltage range from (VIN + 1V) up to 76V. This is enabled by its internal 80V-rated DMOS switch and current-mode PWM architecture optimized for high step-up ratios. At VIN = 3.3V, the device reliably delivers 70V output with 45% efficiency and <100µVPP ripple at the APD node, as verified in Typical Operating Characteristics (toc34–toc35).
How does the MAX15031ATE+ achieve low-noise output for sensitive APD applications?
The MAX15031ATE+ achieves low-noise output through discontinuous conduction mode (DCM) operation, 10ns LX switch turn-off time, and fixed 400kHz frequency - all minimizing reverse-recovery spikes and enabling simple RC filtering. Measured APD output ripple is <100µVPP with 0.1µF capacitor (toc34), and spectral noise is concentrated at 400kHz ±20kHz, simplifying EMI mitigation in optical receivers.
Can the MAX15031ATE+ monitor APD current down to 500nA with usable accuracy?
Yes - the MAX15031ATE+ current monitor provides ±10% accuracy across 500nA to 1mA APD current, validated over −40°C to +125°C. Gain error remains within ±2.5% (toc19–toc21), and power-supply rejection ratio is ±250ppm/V (Electrical Characteristics table), ensuring stable monitoring even with varying BIAS voltage in optical modules.
What is the role of the CNTRL pin in the MAX15031ATE+ and how is it used in practice?
The CNTRL pin on the MAX15031ATE+ allows dynamic adjustment of the FB set-point voltage from 1.245V down to the applied CNTRL voltage (min 1.25V). In practice, it enables closed-loop APD bias control: MOUT current is converted to voltage, digitized by an ADC, and fed to a DAC whose output drives CNTRL - automatically compensating for temperature-induced gain drift in fiber receivers.
Does the MAX15031ATE+ require external components for basic operation, and what are the minimum requirements?
Yes - the MAX15031ATE+ requires external inductor, Schottky diode, input/output capacitors, and feedback resistors. Minimum components: 4.7µH inductor (saturation current >1.3A), 80V Schottky diode, 1µF IN/PWR bypass caps, 0.1µF output cap, and two resistors for FB divider. For 2.7V–5.5V operation, a 10nF ceramic capacitor between CP and CN is mandatory per the charge-pump specification.
MAX15031ATE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Applications:
- Converter/Current Monitor, APD Bias Applications
- Voltage - Input:
- 2.7V ~ 11V
- Number of Outputs:
- 1
- Voltage - Output:
- 3.7V ~ 76V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (4x4)
MAX15031ATE+ FAQ
1.How can I place an order for MAX15031ATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15031ATE+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX15031ATE+ reliable?
The price and inventory of MAX15031ATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15031ATE+ is usually 5 days.
3.What payment methods are accepted for MAX15031ATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15031ATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15031ATE+?
MAX15031ATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15031ATE+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX15031ATE+?
For technical support, including MAX15031ATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15031ATE+ requirements.
6.How does Aetrix verify that MAX15031ATE+ is sourced from the original manufacturer or authorized distributors?
All MAX15031ATE+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX15031ATE+ meets industry standards.
7.What is the process for return or replacement of MAX15031ATE+?
All MAX15031ATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX15031ATE+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX15031ATE+ part is unused and in its original packaging.
Return procedure for MAX15031ATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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