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Analog Devices Inc./Maxim Integrated MAX15031ATE+T
- Part No.:
- MAX15031ATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX15031ATE+T.pdf
- Description:
- IC REG CONV APD 1OUT 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,546
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Product details
Overview
MAX15031ATE+T from Maxim Integrated is a constant-frequency 400kHz PWM boost converter with integrated 80V/1Ω power switch and high-side current monitor for avalanche photodiode (APD) biasing. It delivers up to 76V output from 2.7V–11V input, provides ±10% current monitoring accuracy from 500nA to 1mA, and features resistor-adjustable APD current limiting with 1µs response. It is used in fiber-optic receiver modules requiring stable, low-noise high-voltage bias.
For engineers reviewing the MAX15031ATE+T datasheet, MAX15031ATE+T pinout, MAX15031ATE+T application, or MAX15031ATE+T equivalent, this page delivers verified technical context, validated pin functions, confirmed APD biasing use cases, and two rigorously cross-checked alternative parts - all grounded in Maxim's official electrical characteristics and functional description.
Technical Context
The MAX15031ATE+T implements a current-mode PWM controller operating in discontinuous conduction mode (DCM) to minimize reverse-recovery noise, with fixed 400kHz switching and no internal slope compensation. Its BiCMOS comparator directly sums output error and switch current signals-eliminating traditional error amplifier phase lag for cycle-by-cycle regulation.
It integrates dual supply-path operation: an internal charge pump (with external 10nF CP/CN capacitor) enables 2.7V–5.5V input support, while direct CP-to-IN connection disables the pump for 5.5V–11V operation. The current monitor mirrors APD current at 1:10 ratio onto MOUT with clamped output via CLAMP pin and supports programmable current limiting via RLIM-connected resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.7V to +5.5V (charge-pump enabled) or +5.5V to +11V (charge-pump bypassed) |
| Output Voltage Range | (VIN + 1V) to 76V - supports APD biasing across full telecom voltage range |
| Switching Frequency | 400kHz ±12% - enables compact RC filtering for low-noise APD bias rails |
| Internal Power Switch | 80V vertical DMOS, 1Ω typical RON - sustains 76V output without external HV FET |
| Current Monitor Accuracy | ±10% (500nA–1mA APD current), ±3.5% (1mA–4mA) - enables precise optical power feedback |
| APD Current Limit Response | 1µs - protects APDs against transient over-illumination before damage occurs |
| Shutdown Current | 2µA max - preserves system standby power budget in always-on optical modules |
| Operating Temperature | −40°C to +125°C - qualified for automotive and industrial fiber transceiver environments |
Pinout & Package
MAX15031ATE+T is housed in a thermally enhanced 4mm × 4mm, 16-pin TQFN package with exposed pad (EP) connected to SGND for improved thermal dissipation. Pin numbering follows standard top-view layout with EP centered beneath the die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWR | Boost converter switch driver supply | Provides gate drive voltage for internal 80V DMOS; bypass to PGND with ≥1µF ceramic capacitor |
| CP / CN | Charge-pump flying capacitor terminals | Enable 2.7V–5.5V operation when CP–CN = 10nF; short CP to IN and leave CN open for 5.5V–11V mode |
| IN | Main logic and control supply | Powers all blocks except switch driver; bypass to PGND with ≥1µF ceramic capacitor |
| FB | Voltage feedback regulation node | Sets output voltage via resistive divider; regulates to 1.245V (typ) or to CNTRL voltage if <1.25V |
| RLIM | APD current-limit threshold programming | Connect resistor to SGND to set limit from 1mA to 5mA; enables ultra-fast (1µs) optical transient protection |
| MOUT | Current-monitor output | Sources 1/10× IAPD; convert to voltage with resistor to SGND; accuracy ±10% down to 500nA |
| CLAMP | MOUT output voltage clamp reference | Defines upper bound of MOUT voltage as VCLAMP + 0.6V; connect to BIAS or external rail, or leave open |
| SHDN | Active-low shutdown control | Pull low to reduce supply current to 2µA; connects internally to IN for default enable |
Key Features
| Feature | Design Value |
|---|---|
| Discontinuous conduction mode (DCM) operation | Eliminates diode reverse-recovery spikes - critical for low-noise APD bias in GPON/FBON receivers |
| 10ns LX switch turn-off time | Reduces dV/dt at LX node, lowering EMI and easing output ripple filtering |
| Three-decade dynamic current monitoring range | Accurately monitors APD currents from 500nA to 4mA - covers dark current through saturation |
| Open-drain ILIM flag | Asserts low during APD overcurrent - enables immediate system-level fault response without polling |
| Thermal shutdown with 10°C hysteresis | Protects against sustained overload in sealed optical modules; auto-recovers after cooling |
| Integrated soft-start (8ms duration) | Limits inrush current during power-up - prevents input rail sag in multi-rail systems |
Applications
| Avalanche Photodiode Biasing | PIN Diode Bias Supplies |
|---|---|
Use Scenario: High-sensitivity optical receivers in GPON and FBON modules require stable, low-noise 30V–70V bias for APDs under varying temperature and optical load. IC Role / Device Role / Timing Role: MAX15031ATE+T generates regulated high-voltage bias and monitors APD photocurrent in real time via MOUT. Use Value: ±10% current monitoring accuracy down to 500nA enables closed-loop gain stabilization; 1µs current limit prevents irreversible APD damage from optical transients. |
Use Scenario: RF front-end switches in base stations and test equipment demand precise, adjustable DC bias for PIN diodes to control insertion loss and isolation. IC Role / Device Role / Timing Role: MAX15031ATE+T supplies clean, programmable bias voltage (up to 76V) and monitors diode leakage current for health diagnostics. Use Value: Wide (VIN + 1V) to 76V output range accommodates diverse PIN voltage requirements; 400kHz fixed frequency simplifies EMI filtering in RF-dense environments. |
| Low-Noise Varactor Diode Bias | LCD Display High-Voltage Supply |
Use Scenario: Tunable RF filters and VCOs use varactor diodes whose capacitance must be precisely controlled by stable, ripple-free DC bias. IC Role / Device Role / Timing Role: MAX15031ATE+T delivers low-noise, high-PSRR bias voltage; its DCM architecture suppresses switching artifacts that modulate varactor Cj. Use Value: 400kHz constant frequency enables narrowband LC filtering; <1V voltage drop (VDROP) ensures tight bias regulation across 500nA–4mA load range. |
Use Scenario: TFT-LCD panels in automotive instrument clusters and industrial HMIs require 20V–60V VCOM or gate-driver supplies with minimal ripple to prevent image flicker. IC Role / Device Role / Timing Role: MAX15031ATE+T serves as compact, integrated boost converter supplying regulated high-voltage rail from 3.3V or 5V system rail. Use Value: 300mW output power supports medium-size displays; −40°C to +125°C rating ensures reliability in unregulated vehicle cabin 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 |
|---|---|---|---|
| MAX15032ATE+ | Same pinout, identical functionality, but rated for −40°C to +85°C only - lacks automotive temperature qualification | Not suitable for under-hood or industrial ambient applications requiring >85°C operation | Select MAX15032ATE+ only for commercial-temperature designs where cost is prioritized over extended thermal range |
| LT3482EDD#TRPBF | 40V max output, no integrated current monitor, requires external sense resistor and op-amp for APD monitoring | Cannot replace MAX15031ATE+T in closed-loop APD bias systems without added components and board area | Choose LT3482EDD#TRPBF only for simpler, lower-voltage biasing where current monitoring is handled externally |
Compared with MAX15031ATE+T, MAX15032ATE+ sacrifices automotive temperature range for lower cost, while LT3482EDD#TRPBF trades integrated monitoring and 76V capability for broader general-purpose boost flexibility - neither offers drop-in replacement capability in APD bias designs requiring full feature parity.
Availability
MAX15031ATE+T is available at Aetrix Electronics and suitable for GPON modules, FBON transceivers, and automotive LiDAR receiver subsystems requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX15031ATE+T 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 industrial, automotive, and communications applications.
The MAX15031ATE+T belongs to Maxim's precision high-voltage bias IC product line, designed specifically for optical receiver modules requiring integrated boosting, accurate current monitoring, and fast transient protection in space-constrained, thermally challenging environments.
FAQ
What is the maximum output voltage supported by the MAX15031ATE+T?
The MAX15031ATE+T supports an output voltage range from (VIN + 1V) up to 76V. This is enabled by its integrated 80V vertical DMOS power switch and current-mode PWM architecture. The 76V upper limit is specified in the Absolute Maximum Ratings and Electrical Characteristics tables, and is validated across the full −40°C to +125°C operating temperature range. Output voltage is set via the FB pin using a resistive divider referenced to either the internal 1.245V bandgap or an external CNTRL voltage.
How does the MAX15031ATE+T achieve low-noise APD biasing?
The MAX15031ATE+T achieves low-noise APD biasing through three key design elements: discontinuous conduction mode (DCM) operation eliminates diode reverse-recovery spikes; a 10ns LX switch turn-off time reduces dV/dt-induced EMI; and its fixed 400kHz switching frequency allows effective RC or LC filtering. These features collectively minimize output voltage ripple - measured at sub-mV levels in typical APD configurations - ensuring stable avalanche gain and reduced optical signal distortion.
Can the MAX15031ATE+T operate from a 3.3V supply?
Yes, the MAX15031ATE+T can operate from a 3.3V supply using its internal charge pump. When VIN is between 2.7V and 5.5V, a 10nF ceramic capacitor is connected between CP and CN pins to double the internal gate-drive voltage, enabling efficient switching of the 80V DMOS. At 3.3V input, the device delivers up to 76V output with verified efficiency curves and startup behavior documented in the Typical Operating Characteristics (TOC) figures toc01–toc03 and toc04.
What is the function of the CLAMP pin on the MAX15031ATE+T?
The CLAMP pin on the MAX15031ATE+T sets the upper voltage limit for the MOUT current-monitor output. When a voltage is applied to CLAMP, the MOUT output is clamped to approximately VCLAMP + 0.6V (forward diode drop). This protects downstream circuitry - such as ADC inputs or op-amps - from overvoltage during APD current surges. CLAMP may be tied to BIAS, an external rail, or left unconnected if clamping is not required, as confirmed in the Pin Description and Functional Diagram sections.
Does the MAX15031ATE+T provide thermal protection?
Yes, the MAX15031ATE+T includes thermal shutdown protection that activates when the junction temperature reaches +160°C, with 10°C hysteresis to prevent oscillation near the trip point. This is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Thermal shutdown disables the boost converter and current monitor, reducing power dissipation until the die cools below +150°C, at which point normal operation resumes automatically - a critical safeguard in sealed optical modules with limited heat sinking.
MAX15031ATE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX15031ATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15031ATE+T 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+T reliable?
The price and inventory of MAX15031ATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15031ATE+T is usually 5 days.
3.What payment methods are accepted for MAX15031ATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15031ATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15031ATE+T?
MAX15031ATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15031ATE+T 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+T?
For technical support, including MAX15031ATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15031ATE+T requirements.
6.How does Aetrix verify that MAX15031ATE+T is sourced from the original manufacturer or authorized distributors?
All MAX15031ATE+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX15031ATE+T?
All MAX15031ATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX15031ATE+T, 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+T part is unused and in its original packaging.
Return procedure for MAX15031ATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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