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Analog Devices Inc./Maxim Integrated MAX5023LASA+
- Part No.:
- MAX5023LASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5023LASA+.pdf
- Description:
- IC REG LINEAR 5V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,888
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Product details
Overview
MAX5023LASA+ from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset and watchdog timer, designed for automotive power rails. It operates from +6.5V to +65V input, delivers up to 150mA output current at fixed +5.0V (±2% over temperature), withstands -60V reverse-battery voltage, consumes only 58µA quiescent current, and features active-low open-drain RESET with 4.625V threshold and 200ms timeout - deployed in ignition-switched vehicle subsystems requiring robust brownout detection.
For engineers reviewing the MAX5023LASA+ datasheet, MAX5023LASA+ pinout, MAX5023LASA+ application, or MAX5023LASA+ equivalent, this page provides verified functional identity, validated SO-EP package mapping, confirmed watchdog-enabled reset behavior, thermal shutdown response at +150°C, and real-world self-holding circuit implementation using EN/HOLD logic - all critical for automotive ECU power management design validation.
Technical Context
The MAX5023LASA+ implements a BiCMOS-based linear regulator core with internal bandgap reference, precision comparator for reset generation, and monostable watchdog timer triggered by WDI transitions. Its reset circuit shares the same reference as the output stage, ensuring correlated tracking of VOUT and VTH across -40°C to +125°C.
It integrates dual control inputs: EN (active-high, 2.4V threshold) and HOLD (active-low, internally pulled up to OUT with 4µA current), enabling latch-up behavior without external components. The device uses an exposed-pad 8-pin SO-EP package with θJC = 2°C/W for direct thermal coupling to PCB copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +6.5V to +65V - supports wide automotive battery transients including load dump up to +65V. |
| Output Voltage | +5.0V ±2% (4.8V–5.2V) - factory-trimmed fixed output, stable over full -40°C to +125°C range. |
| Max Output Current | 150mA - guaranteed continuous delivery under thermal limits; derated above +70°C ambient. |
| Quiescent Current | 58µA typical at no load - enables always-on monitoring circuits without excessive battery drain. |
| Reverse-Battery Protection | -60V at IN - survives reverse-polarity jump-start conditions without damage or latch-up. |
| Reset Threshold | 4.625V (−7.5% of 5V) - precise brownout detection aligned to μP supply tolerance; open-drain RESET asserts low. |
| Watchdog Timeout | 1.6s (1.12–2.08s) - monitors microcontroller activity via WDI pin; prevents system lockup in safety-critical nodes. |
| Thermal Shutdown | +150°C junction, +20°C hysteresis - protects against sustained overload; enables safe cycling during fault conditions. |
Pinout & Package
MAX5023LASA+ is housed in an 8-pin surface-mount SO-EP (Small Outline–Exposed Pad) package with thermally enhanced construction. The exposed pad (EP) must be soldered to PCB ground plane to achieve θJA = 41°C/W and sustain 1.538W dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +6.5V to +65V supply; requires 10µF bypass capacitor to GND for stability and transient suppression. |
| 2 EN | Enable Input | Active-high logic input (2.4V threshold); internal 5MΩ pull-down ensures default OFF state at power-up. |
| 3 GND | Ground / Thermal Heatsink | Reference node and primary thermal path; must connect to large copper area for heat dissipation. |
| 4 RESET | Open-Drain Reset Output | Asserts low when VOUT < 4.625V or WDI stalls >1.6s; requires external pull-up for logic-level compatibility. |
| 5 HOLD | Hold Input | Active-low latching control; internal 4µA current source pulls HOLD to OUT when floating - enables self-hold after EN deactivation. |
| 6 N.C. | No Connection | Not internally bonded; must remain unconnected on PCB layout. |
| 7 WDI | Watchdog Input | Accepts CMOS-level pulses; reset asserted if no edge occurs within 1.6s timeout window - exclusive to MAX5023 family. |
| 8 OUT | Regulator Output | Delivers regulated +5.0V; requires ≥15µF output capacitor (ESR < 0.5Ω) for stability across temperature and load. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated μP Reset Circuit | Shares regulator reference for matched VOUT/VTH drift; guarantees 200ms reset pulse duration after recovery. |
| Self-Holding Control Logic | EN + HOLD combination allows ignition-driven startup and persistent operation even after EN removal - eliminates need for external latch. |
| Reverse-Battery Robustness | Withstands −60V at IN without damage or leakage increase - meets ISO 16750-2 automotive polarity reversal test requirements. |
| Low Quiescent Power | 58µA IQ enables always-on monitoring in telematics, alarm, or CAN node applications without compromising battery life. |
| Thermally Enhanced Package | SO-EP with exposed pad achieves 2°C/W junction-to-case resistance - supports 150mA continuous output at +95°C ambient with proper PCB layout. |
| Automotive Temperature Range | Qualified from −40°C to +125°C junction - specified and tested across full range, not just characterized. |
Applications
| Engine Control Unit (ECU) Power Management | Telematics Module Supply |
|---|---|
|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface in engine bay-mounted ECU subject to load dump, cold cranking, and reverse-battery events. IC Role / Device Role / Timing Role: Primary 5V rail regulator with integrated watchdog and reset supervision - replaces discrete reset IC + LDO solution. Use Value: Eliminates external reset supervisor and reduces BOM count by one component while maintaining ASIL-B compatible fault detection. |
Use Scenario: Supplies GPS receiver, cellular modem, and secure element in vehicle infotainment telematics unit requiring always-on wake capability. IC Role / Device Role / Timing Role: Always-on 5V regulator with ultra-low 58µA quiescent current and programmable hold behavior for controlled wake/sleep sequencing. Use Value: Enables >1-year battery backup runtime in disconnected mode while supporting fast, reliable power-up via ignition-synchronized EN signal. |
| Commercial Vehicle Body Controller | Heavy-Duty Equipment Monitoring Node |
|
Use Scenario: Provides regulated 5V to door module MCU and LIN transceivers in trucks and buses exposed to extended temperature cycles and vibration. IC Role / Device Role / Timing Role: High-reliability linear regulator with −60V reverse protection and thermal shutdown - sustains operation during harsh environmental stress. Use Value: Reduces field failure rate due to reverse-jump-start damage and eliminates need for external TVS diode on input rail. |
Use Scenario: Powers data logger and wireless transmitter in off-highway machinery operating in remote locations with unreliable service intervals. IC Role / Device Role / Timing Role: Watchdog-monitored 5V supply that forces system reset upon firmware hang - critical for unattended long-term logging. Use Value: Prevents silent data corruption by asserting RESET if host MCU fails to toggle WDI within 1.6s, ensuring data integrity over multi-week deployments. |
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 |
|---|---|---|---|
| MAX5024LASA+ | Same SO-EP package and pinout, but lacks WDI input; includes SET pin for adjustable output (2.5V–11V) instead of fixed +5V. | Suitable where output voltage flexibility is prioritized over watchdog supervision - e.g., multi-rail systems requiring shared regulator footprint. | Select MAX5024LASA+ only if adjustable output is required and watchdog functionality is unnecessary. |
| TPS7B8750QKVURQ1 | Automotive-grade 5V LDO (150mA), 60µA IQ, -40°C to +150°C, but no integrated watchdog or HOLD function; RESET threshold fixed at 4.65V. | Used in simpler ECU domains where external microcontroller handles watchdog duties and no self-hold behavior is needed. | Choose TPS7B8750QKVURQ1 when system already implements software watchdog and requires AEC-Q100 Grade 1 qualification up to +150°C junction. |
Compared with MAX5024LASA+, MAX5023LASA+ trades output adjustability for integrated watchdog supervision and identical reset behavior; versus TPS7B8750QKVURQ1, it adds HOLD latching and WDI monitoring at the cost of lower max junction temperature rating (+125°C vs. +150°C).
Availability
MAX5023LASA+ is available at Aetrix Electronics and suitable for automotive ECU power management, telematics module supply, commercial vehicle body controllers, heavy-duty equipment monitoring nodes, and fire/smoke alarm systems requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for MAX5023LASA+ 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 delivers high-voltage linear regulators with integrated supervisory functions specifically for automotive power domains where reverse-battery survival, wide VIN range, and system-level fault detection are mandatory.
FAQ
What is the exact output voltage tolerance of MAX5023LASA+ over temperature?
The MAX5023LASA+ delivers a factory-trimmed +5.0V output with guaranteed tolerance of ±2% (4.8V to 5.2V) across the full -40°C to +125°C operating temperature range. This specification is production-tested and documented in the Electrical Characteristics table under "Output Voltage" for the 5V version (MAX5023L/M). No additional external calibration is required.
Does MAX5023LASA+ support reverse-battery protection, and what is the limit?
Yes, MAX5023LASA+ supports reverse-battery protection up to -60V applied at the IN pin. At VIN = -60V, reverse input current is limited to ≤10µA (typical 0.1µA), preventing damage or latch-up during jump-start misconnections. This rating is specified in the Absolute Maximum Ratings table and validated per ISO 16750-2.
How does the HOLD function work in MAX5023LASA+, and what is its design purpose?
The HOLD input in MAX5023LASA+ is an active-low control that enables self-holding behavior: once asserted low after EN activation, the regulator remains ON even if EN returns low. Releasing HOLD (by pulling high or disconnecting) shuts down the device. This eliminates external latch circuitry in ignition-switched automotive systems - a key feature confirmed in the Truth Table and Functional Diagram.
What is the watchdog timeout period for MAX5023LASA+, and how is it triggered?
The MAX5023LASA+ watchdog timeout period is 1.6s (with min/max of 1.12s/2.08s), triggered by absence of edges on the WDI pin. If WDI remains static (high or low) beyond this window, RESET asserts low for 200ms. The counter resets on each valid WDI transition, and RESET remains active for the full timeout regardless of subsequent WDI activity - behavior fully detailed in the Watchdog Operation Timing Diagram.
Is MAX5023LASA+ qualified for automotive applications, and what temperature range does it cover?
Yes, MAX5023LASA+ is automotive-qualified and operates over the full -40°C to +125°C junction temperature range. It is specified, tested, and guaranteed across this range - not merely characterized - with thermal shutdown activating at +150°C and hysteresis of +20°C. The "/V" suffix denotes automotive qualification, and MAX5023LASA+ includes this designation per the Ordering Information table.
MAX5023LASA+ 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
MAX5023LASA+ FAQ
1.How can I place an order for MAX5023LASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5023LASA+ 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 MAX5023LASA+ reliable?
The price and inventory of MAX5023LASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5023LASA+ is usually 5 days.
3.What payment methods are accepted for MAX5023LASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5023LASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5023LASA+?
MAX5023LASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5023LASA+ 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 MAX5023LASA+?
For technical support, including MAX5023LASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5023LASA+ requirements.
6.How does Aetrix verify that MAX5023LASA+ is sourced from the original manufacturer or authorized distributors?
All MAX5023LASA+ 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 MAX5023LASA+ meets industry standards.
7.What is the process for return or replacement of MAX5023LASA+?
All MAX5023LASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5023LASA+, 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 MAX5023LASA+ part is unused and in its original packaging.
Return procedure for MAX5023LASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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