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Analog Devices Inc./Maxim Integrated MAX5023MASA+
- Part No.:
- MAX5023MASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5023MASA+.pdf
- Description:
- IC REG LINEAR 5V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:611
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Product details
Overview
MAX5023MASA+ from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset and watchdog timer, operating from +6.5V to +65V input and delivering up to 150mA output current at fixed +5.0V (±2% over temperature), with 60μA no-load quiescent current and -60V reverse-battery protection. It is designed for automotive power-supply supervision in ignition-switched systems requiring self-holding behavior and brownout detection.
For engineers reviewing the MAX5023MASA+ datasheet, MAX5023MASA+ pinout, MAX5023MASA+ application, or MAX5023MASA+ equivalent, key selection criteria include its 1.6s watchdog timeout, active-low open-drain RESET with 200ms timeout, HOLD/EN control logic for latch-up-free ignition sequencing, and SO-EP thermal performance enabling 1.5W dissipation at +70°C ambient.
Technical Context
The MAX5023MASA+ implements a BiCMOS linear regulator with internal bandgap reference, thermal shutdown at +150°C (20°C hysteresis), and reverse-battery protection circuitry that limits input current to ≤10μA at -60V. Its reset supervisor uses the same reference as the regulator, asserting RESET when VOUT falls below 4.375V (–12.5% of 5V) and holding low for 200ms after recovery.
Watchdog functionality monitors WDI pin transitions: absence of edge within 1.12–2.08s triggers RESET assertion; RESET remains low for full 140–260ms regardless of subsequent WDI activity. The HOLD input enables self-holding via internal 4μA pullup to OUT, allowing EN to be released while maintaining regulation - a feature validated for automotive ignition switch interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +6.5V to +65V - supports wide automotive battery transients including load dump |
| Output Voltage | +5.0V ±2% (4.8V–5.2V) - factory-trimmed fixed output, stable across –40°C to +125°C |
| Max Output Current | 150mA - guaranteed minimum drive capability under worst-case thermal conditions |
| Quiescent Current | 58μA typical (≤140μA) - enables always-on monitoring without excessive battery drain |
| Reverse-Battery Protection | -60V at IN - withstands reverse-polarity jump-start events without damage or latch-up |
| Reset Threshold | 4.375V (–12.5%) - precise brownout detection aligned to 5V μP supply tolerance |
| Watchdog Timeout | 1.12s to 2.08s - configurable pulse timing window for firmware health monitoring |
| Thermal Shutdown | +150°C with 20°C hysteresis - prevents permanent junction damage during overload |
Pinout & Package
MAX5023MASA+ is housed in an 8-pin SO-EP (Small Outline–Exposed Pad) package with thermally enhanced copper pad soldered to PCB ground plane for 41°C/W junction-to-ambient thermal resistance. The exposed pad (EP) must be connected to GND for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | High-voltage input rail (+6.5V to +65V); requires 10μF bypass to GND |
| 2 EN | Enable Input (active-high) | Pull ≥2.4V to enable regulation; internally pulled down with 5MΩ resistor |
| 3 GND | Ground / Thermal Heatsink | Reference node and primary thermal path; must connect EP to GND plane |
| 4 RESET | Active-Low Open-Drain Reset Output | Asserts low on brownout or watchdog timeout; requires external pullup |
| 5 HOLD | Hold Input (active-low) | Forces latched ON state when pulled low after EN activation; internal 4μA pullup to OUT |
| 6 N.C. | No Connection | Not bonded; leave unconnected and unpopulated on PCB |
| 7 WDI | Watchdog Timer Input | Accepts logic-level pulses; reset triggered if no transition >1.6s |
| 8 OUT | Regulator Output | +5V regulated output; requires ≥15μF low-ESR capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Self-Holding Circuit Implementation | HOLD input enables latch-up-free ignition sequencing without external components or relays |
| Integrated Watchdog Timer | 1.6s timeout with automatic RESET assertion and 200ms deassertion delay - eliminates need for discrete watchdog IC |
| Automotive-Grade Temperature Range | –40°C to +125°C operation with guaranteed parameters - qualified for under-hood deployment |
| Reverse-Battery Fault Tolerance | Withstands –60V at IN with <10μA leakage - protects against jump-start polarity errors |
| Low-Power Shutdown Mode | ≤16μA shutdown current - preserves battery life during vehicle off-state |
| Thermally Enhanced Package | SO-EP dissipates 1.538W at +70°C ambient (derates 19.2mW/°C above), enabling high-power-density designs |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Power Supervision |
|---|---|
Use Scenario: Powering microcontroller and CAN transceiver in door module with ignition-switched 12V supply subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Primary 5V LDO with integrated reset and watchdog; provides clean power and detects firmware hangs during sleep/wake cycles. Use Value: Eliminates need for separate reset IC and external hold circuit, reducing BOM count by two components while meeting AEC-Q100 Grade 1 thermal requirements. |
Use Scenario: Supervising 5V rail in DIN-rail mounted programmable logic controller exposed to industrial voltage surges and wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability linear regulator with brownout detection and thermal shutdown; ensures deterministic reset during AC line sags. Use Value: –60V reverse-battery rating and 150mA drive allow direct connection to unfiltered 24V DC bus, avoiding costly transient protection stages. |
| Fire Alarm Control Panel | Telecom Remote Radio Unit (RRU) |
Use Scenario: Providing fault-tolerant 5V supply to smoke sensor interface and alarm driver in battery-backed fire panel operating continuously for 10+ years. IC Role / Device Role / Timing Role: Always-on regulator with ultra-low 60μA quiescent current and watchdog-enforced firmware integrity check. Use Value: Enables >10-year battery life in standby mode while guaranteeing system reset on processor lockup - critical for life-safety compliance. |
Use Scenario: Powering baseband processor and clock generator in outdoor telecom RRU powered from 48V DC plant with lightning-induced transients. IC Role / Device Role / Timing Role: Input-transient-hardened 5V regulator with integrated reset supervisor for FPGA configuration monitoring. Use Value: SO-EP thermal performance allows operation at +85°C ambient without derating, eliminating need for heatsinks in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5024MASA+ | Replaces fixed +5V output with adjustable output (2.5V–11V) via SET pin; lacks WDI watchdog input | Suitable where output voltage flexibility outweighs need for hardware watchdog; not drop-in for watchdog-dependent firmware | Select MAX5024MASA+ only if adjustable output is required and watchdog functionality is handled externally or in software |
| TPS7B7702QPWPRQ1 | Automotive-grade 40V LDO with integrated watchdog and reset, but lower 100mA output current and no HOLD latch function | Better suited for lower-current MCU cores; cannot implement self-holding ignition circuits without external MOSFET | Choose TPS7B7702QPWPRQ1 when AEC-Q100 Grade 0 qualification is mandatory and HOLD functionality is unnecessary |
Compared with MAX5024MASA+, MAX5023MASA+ provides essential watchdog supervision for safety-critical firmware, while TPS7B7702QPWPRQ1 offers higher automotive qualification but sacrifices the HOLD latch needed for ignition-switched architectures - making MAX5023MASA+ uniquely suited for BCM and body electronics where both features are required.
Availability
MAX5023MASA+ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, fire alarm panels, and telecom remote radio units requiring stable component supply with long lifecycle support and AEC-Q100-aligned reliability.
Supply support for MAX5023MASA+ 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 demanding industrial, automotive, and communications applications.
The MAX5023/MAX5024 product line targets high-reliability power-supply supervision in harsh environments, combining wide-input linear regulation with integrated reset, watchdog, and latch-up prevention for automotive and safety-critical systems.
FAQ
What is the exact reset threshold voltage for MAX5023MASA+?
The MAX5023MASA+ has a guaranteed reset threshold of 4.375V (–12.5% of nominal 5.0V output), with min/max limits of 4.25V to 4.50V across –40°C to +125°C. This threshold is factory-trimmed and referenced to the internal bandgap, ensuring accurate brownout detection independent of external components. The MAX5023MASA+ asserts active-low RESET when VOUT falls below this level and holds it low for 140–260ms after recovery.
Does MAX5023MASA+ support adjustable output voltage?
No, MAX5023MASA+ does not support adjustable output voltage. It is a fixed +5.0V output device. The SET pin is absent in MAX5023 variants; only MAX5024 devices include the SET pin for configuring outputs from +2.5V to +11V using an external resistor divider. MAX5023MASA+ integrates dedicated WDI and fixed-feedback circuitry optimized for watchdog-critical applications where output stability and simplicity are prioritized over adjustability.
How does the HOLD function work in MAX5023MASA+?
In MAX5023MASA+, the HOLD pin implements a self-holding circuit: when pulled low after EN is asserted high, the regulator remains ON even if EN is subsequently driven low. This behavior is enabled by internal logic that latches the output state. To shut down, HOLD must be released (allowed to float or pulled high) while EN is low. An internal 4μA current source pulls HOLD to OUT, so connecting HOLD directly to OUT achieves latching without external components - a key feature for automotive ignition-switched systems.
What thermal performance can be expected from MAX5023MASA+ in SO-EP package?
MAX5023MASA+ in SO-EP package delivers 41°C/W junction-to-ambient thermal resistance (θJA) when mounted on a 4-layer PCB with 1in² copper pour connected to the exposed pad. At +70°C ambient, it dissipates 1.538W continuously; above +70°C, derating is 19.2mW/°C. With proper thermal layout, MAX5023MASA+ sustains 150mA output at +85°C ambient when VIN = +14V and VOUT = +5V - verified in Maxim's thermal tutorial and Figure 5 of the datasheet.
Is MAX5023MASA+ qualified for automotive applications?
Yes, MAX5023MASA+ is specified for the automotive temperature range (–40°C to +125°C) and carries the "/V" suffix option (e.g., MAX5023MASA/V+) for AEC-Q100 qualified versions. While MAX5023MASA+ itself is not explicitly marked /V in the ordering guide, its electrical characteristics, thermal design, and packaging meet automotive-grade reliability requirements. For production automotive use, Aetrix recommends verifying qualification status with the latest Maxim/Analog Devices documentation and selecting the /V+ variant where formal AEC-Q100 certification is contractually required.
MAX5023MASA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 54dB (100Hz)
- Control Features:
- Enable, Hold, Reset, Watchdog
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX5023MASA+ FAQ
1.How can I place an order for MAX5023MASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5023MASA+ 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 MAX5023MASA+ reliable?
The price and inventory of MAX5023MASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5023MASA+ is usually 5 days.
3.What payment methods are accepted for MAX5023MASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5023MASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5023MASA+?
MAX5023MASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5023MASA+ 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 MAX5023MASA+?
For technical support, including MAX5023MASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5023MASA+ requirements.
6.How does Aetrix verify that MAX5023MASA+ is sourced from the original manufacturer or authorized distributors?
All MAX5023MASA+ 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 MAX5023MASA+ meets industry standards.
7.What is the process for return or replacement of MAX5023MASA+?
All MAX5023MASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5023MASA+, 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 MAX5023MASA+ part is unused and in its original packaging.
Return procedure for MAX5023MASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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