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Analog Devices Inc./Maxim Integrated MAX5087AATE+
- Part No.:
- MAX5087AATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5087AATE+.pdf
- Description:
- IC REG LIN POS ADJ 400MA 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,838
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Product details
Overview
The MAX5087AATE+ from Maxim Integrated is a high-voltage linear regulator delivering up to 400mA output current with 3.3V fixed output, operating from 6.5V to 45V input, consuming only 70μA quiescent current, and featuring integrated μP reset with programmable timeout-used in automotive power rails and industrial sensor modules requiring stable low-noise bias.
For engineers reviewing the MAX5087AATE+ datasheet, MAX5087AATE+ pinout, MAX5087AATE+ application, or MAX5087AATE+ equivalent, key selection criteria include guaranteed 400mA load capability at high VIN, remote sense support for precision load regulation, thermal shutdown at +175°C, adjustable reset timeout via CT capacitor, and operation across -40°C to +125°C.
Technical Context
The MAX5087AATE+ implements a BiCMOS-based linear regulation architecture with an internal 1.235V reference and error amplifier driving a high-voltage pass transistor. Its dual-mode feedback supports either fixed 3.3V output (SET grounded) or adjustable 2.5V–11V output via external resistor divider connected to OUTSENSE and SET.
Integrated supervision includes a delay comparator monitoring VOUT against 92% of nominal output, generating an open-drain active-low RESET signal; timeout is set by a capacitor on CT pin, charged at 2μA, enabling precise reset hold-off from microseconds to seconds. Thermal protection engages at +175°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 45V - supports direct connection to automotive battery (12V/24V systems) and industrial 24V/48V rails without pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.3% - guaranteed over full -40°C to +125°C range and 5mA–400mA load, suitable for powering MCU I/O and communication peripherals. |
| Max Output Current | 400mA - sustained delivery under worst-case thermal conditions (TA = +70°C, TQFN package), limited by junction temperature and dropout. |
| Quiescent Current | 70μA - enables always-on subsystems (e.g., CAN wake-up receivers) with minimal standby power drain. |
| Dropout Voltage | 0.9V (typ) at 400mA - allows regulation down to VIN = VOUT + 0.9V, critical for maintaining 3.3V output during cold-crank (VIN ≥ 4.2V). |
| Reset Threshold | 92% of VOUT (±2%) - ensures reliable microprocessor reset before logic supply violation; hysteresis prevents chatter near threshold. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial control cabinet deployment. |
Pinout & Package
MAX5087AATE+ is housed in a 16-pin thermally enhanced TQFN-EP (exposed paddle) package, optimized for high-power dissipation (2.6W at TA = +70°C) and low θJA = 30.0°C/W. The exposed paddle must be soldered to a large PCB ground plane for thermal performance; it is not electrically connected to GND internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12–16 | N.C. | No internal connection - must remain unconnected; no routing or copper fill required. |
| 2 | EN | Logic-level enable input - drive ≥2.4V to activate regulator; ≤0.4V places device in 11μA shutdown mode. |
| 3, 4 | IN | Main input supply pins - parallel connection required for low-impedance path; bypass with ≥47μF low-ESR capacitor to GND. |
| 5, 6 | OUT | Regulated output - connect ≥15μF low-ESR capacitor to GND; supports remote sensing via OUTSENSE. |
| 7 | OUTSENSE | Remote sense feedback point - tied directly to OUT for fixed 3.3V operation; left open for adjustable mode. |
| 8 | GND | Analog/digital ground reference - connect to low-impedance ground plane; separate from exposed paddle (EP). |
| 9 | SET | Feedback reference node - grounded for 3.3V fixed output; forms voltage divider with R1/R2 for adjustable mode (VSET = 1.235V). |
| 10 | RESET | Open-drain active-low reset output - requires external pullup (e.g., 10kΩ to 3.3V/5V); asserts when VOUT drops below 92% VOUT. |
| 11 | CT | Reset timeout capacitor connection - 2μA constant current charges external capacitor to set tRP = CCT × 0.6175 × 10⁶ s. |
Key Features
| Feature | Design Value |
|---|---|
| Thermally enhanced TQFN-EP package | Dissipates 2.6W at TA = +70°C with θJC = 2°C/W - enables high-current operation without heatsink in space-constrained automotive modules. |
| Remote load sense (OUTSENSE) | Compensates for IR drop in PCB traces or connectors - maintains ±1% output accuracy at point-of-load for precision analog subsystems. |
| Adjustable reset timeout (CT pin) | Capacitor-programmable hold time (e.g., 100nF → ~62ms) - eliminates need for external RC timer or supervisor IC in safety-critical boot sequencing. |
| Low-quiescent-current shutdown | 11μA max shutdown current - extends battery life in always-on telematics or alarm systems where EN is controlled by microcontroller GPIO. |
| Integrated thermal and short-circuit protection | Shuts down at TJ = +175°C with 25°C hysteresis; survives indefinite short-circuit at VIN < 14V - reduces system-level fault management complexity. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and analog sensors in vehicle door modules, where input voltage varies from 6V (cold crank) to 45V (load dump). IC Role / Device Role / Timing Role: Primary 3.3V bias regulator with integrated reset - ensures deterministic MCU boot after battery reconnection and monitors rail integrity during transient events. Use Value: Eliminates discrete reset IC and external sense resistors; 400mA output supports multi-peripheral integration without derating. | Use Scenario: Supplies isolated 3.3V logic rails for digital input/output cards in programmable logic controllers operating in factory environments with 24V DC bus. IC Role / Device Role / Timing Role: High-reliability linear regulator with remote sense - compensates for voltage drop across long backplane traces and maintains stable logic levels under varying load. Use Value: Reduces BOM count by integrating reset supervision and thermal protection; -40°C to +125°C rating avoids derating in uncooled enclosures. |
| Home Security Panel MCU Supply | Networking Equipment Standby Rail |
Use Scenario: Provides always-on 3.3V supply for ARM Cortex-M based security panel MCU, backed by 12V battery during AC mains failure. IC Role / Device Role / Timing Role: Low-quiescent linear regulator with programmable reset - guarantees clean boot after brownout recovery and holds reset until VOUT stabilizes post-battery switchover. Use Value: 70μA IQ enables >1-year battery backup life; CT-programmable timeout aligns with UL-certified fault-clearing intervals. | Use Scenario: Generates 3.3V standby voltage for Ethernet PHY and wake-on-LAN circuitry in enterprise switches, powered from 48V PoE midspan. IC Role / Device Role / Timing Role: High-input-voltage linear regulator with enable control - activated only during low-power states to minimize idle consumption while maintaining fast wake-up response. Use Value: Supports direct 48V-to-3.3V conversion without buck converter complexity; EN pin allows synchronized power sequencing with main SoC rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2940T-3.3/NOPB | 40V max input, 1A output, 10mA IQ, no RESET or CT timeout - lacks supervision features and remote sense. | Suitable for cost-sensitive non-safety applications where reset timing and load regulation accuracy are secondary. | Select when only basic 3.3V regulation is needed and board space permits larger TO-220 package. |
| TPS7B8733QKVURQ1 | 40V max input, 500mA output, 28μA IQ, integrated watchdog and windowed reset - higher integration but fixed 3.3V only, no adjustable mode. | Better suited for ASIL-B automotive domains requiring diagnostic coverage, but requires different layout due to WSON-10 package. | Choose for next-gen automotive ECUs needing ISO 26262-compliant supervision, accepting higher cost and no adjustable output option. |
Compared with LM2940T-3.3/NOPB, MAX5087AATE+ adds programmable reset timeout and remote sensing at lower IQ; versus TPS7B8733QKVURQ1, it offers adjustable output voltage and higher input voltage tolerance (45V vs 40V), but lacks built-in watchdog functionality.
Availability
MAX5087AATE+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and home security system design requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned reliability.
Supply support for MAX5087AATE+ 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, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX5087 product line delivers high-voltage linear regulators with integrated supervision for harsh-environment applications demanding wide input range, low IQ, and robust fault protection.
FAQ
What is the guaranteed output voltage tolerance for MAX5087AATE+ over temperature?
The MAX5087AATE+ guarantees a 3.3V output within ±1.3% (3.208V to 3.392V) across the full -40°C to +125°C operating range at 5mA–400mA load, as verified per Electrical Characteristics table limits under Note 3 and Figure toc04.
Can MAX5087AATE+ be used in adjustable-output configuration?
No - MAX5087AATE+ is the fixed 3.3V version. Its SET pin is internally configured for 3.3V operation and must be grounded. For adjustable output (2.5V–11V), use MAX5087AETE+ or MAX5087BETE+ with external resistor divider connected to SET and OUTSENSE.
What is the maximum allowable input voltage for MAX5087AATE+ during transient conditions?
MAX5087AATE+ supports IN-to-GND voltage up to +50V for continuous operation, and up to +42V for pulses ≤300ms with IOUT ≤250mA, per Absolute Maximum Ratings - enabling robustness against automotive load-dump transients.
How is the reset timeout period calculated for MAX5087AATE+?
The reset timeout period for MAX5087AATE+ is calculated as tRP = CCT × 0.6175 × 10⁶ seconds, where CCT is the capacitor value (in farads) connected from CT pin to GND. For example, a 100nF capacitor yields ~61.8ms timeout, verified in the Adjustable Reset Timeout Period section.
Does MAX5087AATE+ require an external capacitor on the OUTSENSE pin?
No - for MAX5087AATE+, OUTSENSE must be directly connected to the OUT pin to enable remote sensing for improved load regulation accuracy. Leaving OUTSENSE floating or connecting it elsewhere invalidates the 3.3V output specification and may cause instability.
MAX5087AATE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 2.5V (3.3V)
- Voltage - Output (Max):
- 11V
- Voltage Dropout (Max):
- 2.2V @ 400mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (100Hz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5087AATE+ FAQ
1.How can I place an order for MAX5087AATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5087AATE+ 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 MAX5087AATE+ reliable?
The price and inventory of MAX5087AATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5087AATE+ is usually 5 days.
3.What payment methods are accepted for MAX5087AATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5087AATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5087AATE+?
MAX5087AATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5087AATE+ 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 MAX5087AATE+?
For technical support, including MAX5087AATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5087AATE+ requirements.
6.How does Aetrix verify that MAX5087AATE+ is sourced from the original manufacturer or authorized distributors?
All MAX5087AATE+ 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 MAX5087AATE+ meets industry standards.
7.What is the process for return or replacement of MAX5087AATE+?
All MAX5087AATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5087AATE+, 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 MAX5087AATE+ part is unused and in its original packaging.
Return procedure for MAX5087AATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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