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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
- Quantity:
- Payment:
- Shipping:
Inventory:497
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Product details
Overview
MAX5023MASA from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset and watchdog timer, designed for automotive power-supply supervision. It operates from +6.5V to +65V input, delivers up to 150mA output current at +5V fixed output, consumes only 58µA quiescent current (typ), and withstands −60V reverse-battery voltage. It is used in ignition-controlled vehicle subsystems requiring reliable brownout detection and fail-safe reset assertion.
For engineers reviewing the MAX5023MASA datasheet, MAX5023MASA pinout, MAX5023MASA application, or MAX5023MASA equivalent, key selection criteria include its −60V reverse-battery protection, 1.6s watchdog timeout, active-low open-drain RESET with 200ms timeout, HOLD-enabled self-holding behavior, and operation across −40°C to +125°C.
Technical Context
The MAX5023MASA integrates a BiCMOS linear regulator core with a precision bandgap reference, thermal shutdown circuitry (trip at +150°C, 20°C hysteresis), and a dedicated watchdog timer monitoring WDI input transitions. Its reset supervisor shares the same reference as the regulator and asserts RESET when VOUT falls below 4.375V (−12.5% of 5V) or remains asserted for 200ms after recovery.
Control logic implements dual-input sequencing: EN (active-high enable) initiates regulation, while HOLD (active-low) latches the ON state-allowing the regulator to remain active even after EN is deasserted. The exposed-pad SO-EP package provides θJA = 41°C/W and supports 1.538W dissipation at TA = +70°C.
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 (fixed, ±4% over temp) - preset by internal resistor divider; no external feedback required. |
| Max Output Current | 150mA - guaranteed continuous delivery under thermal limits with proper PCB copper area. |
| Quiescent Current | 58µA (typ) at no load - enables always-on subsystems without excessive battery drain. |
| Reverse-Battery Protection | −60V at IN - survives reverse jump-start conditions without external diode or FET. |
| Watchdog Timeout | 1.6s (typ) - detects µP lockup; RESET pulses low for 200ms upon timeout. |
| Reset Threshold | 4.375V (−12.5% of 5V) - triggers RESET during brownout; 200ms timeout ensures clean system restart. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive environments. |
Pinout & Package
MAX5023MASA is housed in an 8-pin surface-mount SO-EP (Small Outline–Exposed Pad) package with thermally enhanced copper pad soldered to PCB ground plane for optimal heat dissipation (θJC = 2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +6.5V to +65V supply; requires 10µF bypass to GND; rated for −60V reverse voltage. |
| 2 EN | Enable Input | Active-high logic input; internally pulled down with 5MΩ resistor; controls regulator startup/shutdown. |
| 3 GND | Ground / Thermal Heatsink | Reference node and primary thermal path; must be connected to large copper area for 1.5W dissipation. |
| 4 RESET | Open-Drain Reset Output | Active-low, open-drain; sinks ≥3.2mA at VOUT ≥ +4.25V; asserts during brownout or watchdog timeout. |
| 5 HOLD | Hold Input | Active-low latch control; forces regulator ON even after EN goes low; internally pulled up to OUT via 4µA current source. |
| 6 N.C. | No Connection | Not bonded; must be left unconnected or floating; no internal circuitry attached. |
| 7 WDI | Watchdog Input | Accepts µP pulse train; reset triggered if no edge occurs within 1.6s; cannot be disabled. |
| 8 OUT | Regulator Output | +5V regulated output; requires ≥15µF output capacitor (ESR < 0.5Ω) for stability at 150mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Self-holding circuit implementation | HOLD input enables latched ON state without external components-ideal for ignition-switched automotive modules. |
| Integrated watchdog timer | 1.6s timeout with automatic 200ms RESET assertion prevents silent µP hang in safety-critical systems. |
| Reverse-battery fault tolerance | Withstands −60V at IN without damage or latch-up-eliminates need for external protection diodes. |
| Thermal shutdown with hysteresis | Shuts down at +150°C junction temperature and re-enables only after cooling by 20°C-prevents thermal cycling damage. |
| Low-noise, high-PSRR regulation | 54dB PSRR at 100Hz enables stable µP supply in noisy automotive electrical environments. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power Supply |
|---|---|
|
Use Scenario: Powers microcontroller and CAN transceiver in door module with direct battery connection. IC Role / Device Role / Timing Role: Primary 5V supply with brownout detection and watchdog supervision for fail-safe operation. Use Value: −60V reverse-battery rating eliminates external protection; HOLD enables ignition-triggered latching without auxiliary circuitry. |
Use Scenario: Supplies isolated field I/O circuitry in harsh factory-floor environments. IC Role / Device Role / Timing Role: High-voltage linear regulator with reset assertion during line sags or overtemperature events. Use Value: 150mA output sustains multiple sensors/actuators; thermal shutdown prevents field failure during ambient >+85°C. |
| Fire Alarm Control Panel | Telecom Remote Radio Unit |
|
Use Scenario: Powers smoke detector interface and communication ICs in battery-backed life-safety equipment. IC Role / Device Role / Timing Role: Always-on 5V rail with precise reset threshold (4.375V) ensuring reliable brownout response. Use Value: 58µA quiescent current extends backup battery life; −40°C to +125°C range covers storage and operational extremes. |
Use Scenario: Provides stable 5V bias to RF front-end ICs in outdoor base station cabinets. IC Role / Device Role / Timing Role: High-PSRR linear regulator rejecting switching noise from DC-DC converters feeding RF stages. Use Value: 54dB PSRR at 100Hz suppresses conducted noise; SO-EP package enables compact thermal design 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 | Same package and pinout; replaces watchdog (WDI) with SET input for adjustable output (2.5V–11V); fixed 5V mode identical. | Lacks watchdog functionality but adds output flexibility; suitable where µP supervision is handled externally. | Select MAX5024MASA only if adjustable output is required and watchdog is unnecessary. |
| TPS7B8750QKVURQ1 | Automotive-grade 5V LDO (40V max input, 150mA); includes reset but no watchdog; lower IQ (25µA); different pinout (6-pin WSON). | Lower voltage rating limits use in 65V load-dump scenarios; smaller footprint but no HOLD latch function. | Choose TPS7B8750QKVURQ1 for cost-sensitive, space-constrained designs where 40V input suffices and HOLD is not needed. |
Compared with MAX5024MASA and TPS7B8750QKVURQ1, MAX5023MASA uniquely combines 65V input tolerance, −60V reverse protection, integrated watchdog, and HOLD-based self-holding-making it irreplaceable in ignition-latched automotive modules requiring full fault coverage.
Availability
MAX5023MASA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, fire alarm control panels, and telecom remote radio units requiring stable component supply across extended temperature and voltage ranges.
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.
MAX5023MASA belongs to Maxim's high-voltage linear regulator family engineered specifically for automotive power-supply supervision-integrating reset, watchdog, reverse-battery protection, and latch control in a single SO-EP package.
FAQ
What is the exact output voltage tolerance of MAX5023MASA over temperature?
The MAX5023MASA delivers a nominal +5.0V output with guaranteed tolerance of ±4% over the full −40°C to +125°C operating range. At +25°C, typical output is 5.0V with ±0.4% variation; worst-case deviation is specified as 4.8V to 5.2V across temperature and load (1mA to 150mA). This tight regulation ensures reliable µP operation during cold cranking and hot under-hood conditions.
Does MAX5023MASA require external components to implement the HOLD self-holding function?
No, MAX5023MASA implements self-holding natively using its HOLD pin and internal 4µA pullup current source to OUT. When HOLD is driven low after EN activation, the regulator remains ON even if EN returns low-no external MOSFET, resistor, or capacitor is needed. This simplifies ignition-switched designs and reduces BOM count in automotive modules.
What is the maximum allowable input voltage transient MAX5023MASA can survive without damage?
MAX5023MASA is rated for absolute maximum input voltage of +70V and −60V reverse voltage at the IN pin. It reliably survives automotive load-dump transients up to +65V (per ISO 7637-2 Pulse 5a) and reverse-jump-start events down to −60V-both without external protection components. These ratings are validated per JEDEC stress testing, not just theoretical limits.
How does the watchdog timer in MAX5023MASA behave during sustained µP lockup?
When the µP fails to toggle WDI for >1.6s, MAX5023MASA asserts RESET low for 200ms, then deasserts it for ~1.6s-repeating this pulse train until WDI resumes activity. This ensures periodic wake-up attempts in locked systems. During the 200ms RESET assertion, all WDI edges are ignored; the watchdog counter resets only after RESET deasserts and a valid edge occurs.
Can MAX5023MASA be used with ceramic output capacitors, and what ESR requirement applies?
Yes, MAX5023MASA is stable with ceramic output capacitors provided ESR is <0.5Ω. For X7R/X5R dielectrics, a minimum 15µF capacitor suffices across −40°C to +125°C. Z5U/Y5V types require ≥22µF due to capacitance loss at low temperatures. A 10µF ceramic input capacitor between IN and GND is also mandatory for transient immunity and PSRR optimization.
MAX5023MASA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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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