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Analog Devices Inc./Maxim Integrated MAX5023TASA
- Part No.:
- MAX5023TASA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MAX5023TASA.pdf
- Description:
- IC REG LINEAR
- Quantity:
- Payment:
- Shipping:
Inventory:2,408
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Product details
Overview
The MAX5023TASA 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 fixed +3.3V, consumes only 60μA quiescent current, withstands −60V reverse-battery voltage, and features active-low open-drain RESET with 7.5% threshold tolerance-used in ignition-controlled self-holding circuits for vehicle body control modules.
For engineers reviewing the MAX5023TASA datasheet, MAX5023TASA pinout, MAX5023TASA application, or MAX5023TASA equivalent, this device requires attention to its HOLD/EN logic interaction, WDI watchdog timing (1.6s timeout), thermal derating above +70°C, and SO-EP package thermal management for sustained 150mA operation under automotive ambient conditions.
Technical Context
The MAX5023TASA implements a BiCMOS linear regulator with internal bandgap reference, reverse-battery protection circuitry, and a dedicated watchdog timer monitoring WDI transitions. Its reset supervisor shares the same reference as the regulator and asserts RESET when VOUT falls below 2.970V (−7.5% of 3.3V) or remains asserted for 140–260ms after recovery.
HOLD and EN inputs enable autonomous latching behavior: pulling HOLD low after enabling locks the regulator ON regardless of subsequent EN state; releasing HOLD while EN is low forces shutdown. The exposed pad (EP) connects to GND and provides θJC = 2°C/W thermal path for 1.5W 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 up to +65V |
| Output Voltage | +3.3V ±3.6% (2.970V–3.135V) - factory-trimmed fixed output with guaranteed accuracy over −40°C to +125°C |
| Max Output Current | 150mA - guaranteed continuous delivery with thermal shutdown at TJ = +150°C |
| Quiescent Current | 58–140μA - enables always-on subsystems with minimal parasitic drain during vehicle sleep mode |
| Reverse-Battery Protection | −60V - survives jump-start polarity reversal without external diode or fuse |
| Watchdog Timeout | 1.12–2.08s - monitors microcontroller health via WDI pulse train; resets system if frozen |
| Reset Threshold Tolerance | ±1.25% (−7.5% of nominal) - ensures reliable brownout detection for 3.3V logic rails |
Pinout & Package
MAX5023TASA 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 1.5W dissipation at TA = +70°C. Pin 1 is IN; Pin 2 is EN; Pin 3 is GND; Pin 4 is RESET; Pin 5 is HOLD; Pin 6 is N.C.; Pin 7 is WDI; Pin 8 is OUT; EP is internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts +6.5V to +65V supply; requires 10μF bypass capacitor to GND for stability |
| 2 (EN) | Enable Input | Active-high logic; internal 5MΩ pull-down ensures default OFF state at power-up |
| 3 (GND) | Ground / Thermal Heatsink | Serves as primary return path and thermal conduction interface to PCB copper area |
| 4 (RESET) | Open-Drain Reset Output | Asserts low when VOUT < 2.970V or WDI stalls >1.6s; requires external pullup to VOUT or system rail |
| 5 (HOLD) | Hold Control Input | Active-low latch: forces regulator ON even after EN goes low; internally pulled up to OUT with 4μA current source |
| 6 (N.C.) | No Connection | Not bonded; must remain unconnected per design-no routing or stitching allowed |
| 7 (WDI) | Watchdog Timer Input | Monitors rising/falling edges; reset triggered if no transition occurs within 1.12–2.08s window |
| 8 (OUT) | Regulated Output | Delivers +3.3V at up to 150mA; requires ≥15μF output capacitor with ESR < 0.5Ω for stability |
Key Features
| Feature | Design Value |
|---|---|
| Self-holding circuit implementation | HOLD input enables latched ON state without external components-critical for ignition-switched automotive modules |
| Integrated watchdog timer | 1.6s timeout period with automatic RESET assertion prevents system lockup in microcontroller failure scenarios |
| Reverse-battery survivability | Withstands −60V at IN pin without damage-eliminates need for external series diode in battery-connected applications |
| Thermal performance | θJA = 41°C/W and θJC = 2°C/W allow 1.5W dissipation at +70°C ambient using standard 4-layer board layout |
| Automotive-grade operation | Specified from −40°C to +125°C junction temperature with production-tested limits at extremes |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Power Supervision |
|---|---|
Use Scenario: Powering CAN transceivers and sensor interfaces in vehicle door modules during ignition-off standby. IC Role / Device Role / Timing Role: High-voltage linear regulator providing clean +3.3V rail with reverse-battery protection and watchdog supervision. Use Value: Enables zero-current sleep mode via 60μA quiescent draw while maintaining system readiness for wake-up events. |
Use Scenario: Supplying microcontroller core voltage in engine management systems subject to load-dump transients. IC Role / Device Role / Timing Role: Primary 3.3V regulator with integrated reset and watchdog, directly supervising MCU health. Use Value: Guarantees safe restart after brownout via 200ms reset timeout and prevents runaway code execution via WDI monitoring. |
| Telematics Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Camera Power |
Use Scenario: Regulating power for LTE modem and GPS receiver in connected car infotainment gateways. IC Role / Device Role / Timing Role: High-input-voltage LDO with HOLD-based latching to maintain modem operation during ignition cycling. Use Value: Eliminates external hold circuitry, reducing BOM count and PCB area while ensuring uninterrupted network connectivity. |
Use Scenario: Delivering stable +3.3V to image sensors and ISP processors in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator with reset signaling for fault-safe camera initialization. Use Value: Maintains 150mA output under +105°C under-hood ambient via SO-EP thermal design and 1.5W dissipation capability. |
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 |
|---|---|---|---|
| MAX5024TASA | Same SO-EP package and pinout; replaces WDI with SET input for adjustable output (2.5V–11V); no watchdog function | Used where programmable output voltage is required instead of fixed 3.3V; unsuitable for MCU watchdog supervision | Select MAX5024TASA only if adjustable output is needed and watchdog functionality is not required |
| TPS7B7702QPWPRQ1 | Automotive-grade 40V LDO with integrated reset (adjustable threshold), but no watchdog or HOLD latch; 125mA max output | Lacks self-holding capability and WDI monitoring; suited for simpler reset-only supervision without latching logic | Choose TPS7B7702QPWPRQ1 when HOLD/WDI features are unnecessary and lower output current suffices |
Compared with MAX5024TASA and TPS7B7702QPWPRQ1, the MAX5023TASA uniquely combines fixed +3.3V output, −60V reverse-battery tolerance, HOLD-based latching, and WDI watchdog in a single SO-EP package-making it irreplaceable for ignition-latched automotive subsystems requiring fail-safe MCU supervision.
Availability
MAX5023TASA is available at Aetrix Electronics and suitable for automotive body electronics, industrial control power sequencing, and safety-critical sensor interface designs requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5023TASA 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 and mixed-signal ICs for automotive, industrial, and communications applications, emphasizing reliability, integration, and ruggedized operation.
The MAX5023/MAX5024 product line targets automotive power-supply supervision, delivering high-voltage regulation with integrated reset, watchdog, and latching logic in thermally optimized packages for under-hood deployment.
FAQ
What is the exact reset threshold voltage for MAX5023TASA?
The MAX5023TASA has a guaranteed reset threshold of 2.970V to 3.135V (−7.5% of 3.3V nominal), specified over −40°C to +125°C. This threshold is factory-trimmed and applies to the T-suffix variant per the Selector Guide. The MAX5023TASA asserts RESET low when VOUT drops below this range and holds low for 140–260ms after recovery. This value is confirmed in the Electrical Characteristics table under "Reset Threshold" for MAX5023_T.
Does MAX5023TASA support adjustable output voltage?
No, the MAX5023TASA does not support adjustable output voltage. It is a fixed +3.3V output device. Adjustable operation is exclusive to the MAX5024 family (e.g., MAX5024TASA), which uses the SET pin for feedback divider configuration. The MAX5023TASA lacks the SET pin entirely-Pin 7 is WDI, and no internal circuitry enables output adjustment. Its output is trimmed and unchangeable.
How does the HOLD input function in MAX5023TASA?
In the MAX5023TASA, the HOLD input is an active-low latch that maintains regulator output ON even after EN is deasserted. When HOLD is pulled low after enabling, the internal logic stores the ON state. To shut down, HOLD must be released (allowed to float or pulled high) while EN remains low. HOLD is internally pulled up to OUT with a 4μA current source, so leaving it unconnected defaults to active HIGH (shutdown-ready state).
What thermal derating applies to MAX5023TASA at +105°C ambient?
At TA = +105°C, the MAX5023TASA's maximum allowable power dissipation is calculated as PD = 1.538W − 0.01923W/°C × (105°C − 70°C) = 0.865W. With VIN = +14V and VOUT = +3.3V, this supports up to ~77mA continuous output current before thermal shutdown activates. Derating follows JEDEC JESD51-7 4-layer board assumptions; actual performance depends on PCB copper area and airflow.
Is MAX5023TASA qualified for automotive applications?
Yes, the MAX5023TASA is automotive-qualified: it carries the "/V" suffix in ordering nomenclature (though not present in the base part number shown, the ASA package code and −40°C to +125°C operating range confirm AEC-Q100 alignment). It is specified for automotive environments with reverse-battery protection, load-dump tolerance, and production-tested performance across the full temperature range-explicitly cited in Applications and Ordering Information sections.
MAX5023TASA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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-EP
MAX5023TASA FAQ
1.How can I place an order for MAX5023TASA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5023TASA 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 MAX5023TASA reliable?
The price and inventory of MAX5023TASA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5023TASA is usually 5 days.
3.What payment methods are accepted for MAX5023TASA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5023TASA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5023TASA?
MAX5023TASA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5023TASA 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 MAX5023TASA?
For technical support, including MAX5023TASA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5023TASA requirements.
6.How does Aetrix verify that MAX5023TASA is sourced from the original manufacturer or authorized distributors?
All MAX5023TASA 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 MAX5023TASA meets industry standards.
7.What is the process for return or replacement of MAX5023TASA?
All MAX5023TASA units undergo pre-shipment inspection (PSI). If there is an issue with MAX5023TASA, 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 MAX5023TASA part is unused and in its original packaging.
Return procedure for MAX5023TASA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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