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Analog Devices Inc./Maxim Integrated MAX5023SASA
- Part No.:
- MAX5023SASA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5023SASA.pdf
- Description:
- IC REG LINEAR
- Quantity:
- Payment:
- Shipping:
Inventory:5,324
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Product details
Overview
MAX5023SASA 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 +3.3V fixed output, consumes only 58μA quiescent current, withstands −60V reverse-battery voltage, and features active-low open-drain RESET with 200ms timeout - used in ignition-controlled vehicle modules requiring robust brownout detection.
For engineers reviewing the MAX5023SASA datasheet, MAX5023SASA pinout, MAX5023SASA application, or MAX5023SASA equivalent, key selection criteria include its −60V reverse-battery protection, 1.6s watchdog timeout (WDI), HOLD-enabled self-holding behavior, thermal shutdown at +150°C, and SO-EP package's 1.5W dissipation capability at +70°C ambient.
Technical Context
The MAX5023SASA implements a BiCMOS linear regulator with internal bandgap reference and precision comparator-based reset circuitry sharing the same reference. Its watchdog timer monitors WDI transitions and asserts RESET if no edge occurs within 1.12–2.08s, independent of EN/HOLD state.
Regulator control uses dual logic inputs: EN (active-high, 5MΩ internal pulldown) and HOLD (active-low, internally pulled up to OUT with 4μA current). When HOLD is forced low after enabling, the regulator remains on even if EN returns low - enabling ignition-switched hold without external latching components.
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 fixed (±3.6% over temp) - preset by internal resistor divider; no external feedback required. |
| Max Output Current | 150mA - guaranteed across −40°C to +125°C; limited by thermal dissipation in SO-EP package. |
| Quiescent Current | 58μA typical at no load - enables always-on monitoring in low-power vehicle subsystems. |
| Reverse-Battery Protection | −60V at IN - protects against battery misconnection in 12V/24V automotive systems. |
| Watchdog Timeout | 1.12s to 2.08s - detects microprocessor lockup via WDI pulse train; resets system if missed. |
| Reset Threshold | 2.805V to 2.970V (−7.5% of 3.3V) - triggers RESET when VOUT drops below tolerance during brownout. |
| Thermal Shutdown | +150°C junction temperature with +20°C hysteresis - prevents damage during sustained overload or poor heatsinking. |
Pinout & Package
MAX5023SASA is housed in an 8-pin surface-mount SO-EP (Small Outline–Exposed Pad) package. The exposed pad must be soldered to PCB ground plane for thermal performance (θJA = 41°C/W, θJC = 2°C/W) and electrical grounding. Maximum continuous power dissipation is 1538mW at +70°C ambient, derating 19.2mW/°C above that.
| 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 pulldown to GND; controls initial regulator turn-on. |
| 3 GND | Ground / Thermal Heatsink | Reference node and primary thermal path; must connect exposed pad to large copper area. |
| 4 RESET | Open-Drain Reset Output | Active-low; asserts when VOUT < 2.89V or WDI stalls >1.6s; requires external pullup. |
| 5 HOLD | Hold Input | Active-low; forces self-holding state when pulled low after EN activation; internally pulled to OUT. |
| 6 N.C. | No Connection | Not bonded; leave unconnected and unpopulated on PCB. |
| 7 WDI | Watchdog Input | Accepts CMOS-level pulses; reset triggered if no transition occurs within watchdog timeout window. |
| 8 OUT | Regulator Output | +3.3V fixed output; requires ≥15μF output capacitor (ESR < 0.5Ω) for stability at 150mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Self-Holding Circuit | HOLD input enables latch-free ignition control: regulator stays on after EN deactivation as long as HOLD remains low. |
| Integrated Watchdog Timer | Monitors WDI pulse train with 1.6s timeout; prevents system hang without external timing components. |
| Reverse-Battery Robustness | Withstands −60V at IN pin - eliminates need for external series diode or TVS in battery-input paths. |
| Automotive Temperature Range | Guaranteed operation from −40°C to +125°C junction temperature - qualified for under-hood applications. |
| Low Quiescent Current | 58μA typical no-load supply current - extends battery life in always-on vehicle modules like telematics or alarm sensors. |
| Thermal & Short-Circuit Protection | Auto-shutdown at +150°C with +20°C hysteresis; survives indefinite short-circuit at VIN ≤ +14V. |
Applications
| Engine Control Module (ECM) Power Supervision | Body Control Module (BCM) Always-On Rail |
|---|---|
|
Use Scenario: Powers microcontroller and CAN transceiver in engine bay during cranking and load-dump events. IC Role / Device Role / Timing Role: High-voltage linear regulator with integrated reset and watchdog ensures safe MCU boot and runtime supervision. Use Value: −60V reverse-battery rating and +65V input tolerance eliminate external protection components; HOLD enables ignition-triggered latching without relay. |
Use Scenario: Supplies standby power to BCM microcontroller during vehicle sleep mode with minimal battery drain. IC Role / Device Role / Timing Role: Low-quiescent-current regulator with precise reset threshold maintains reliable wake-up detection during brownout. Use Value: 58μA no-load current extends 12V battery life over months of parking; RESET assertion at 2.89V ensures clean restart before MCU undervoltage lockout. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Vehicle Telematics Unit (VTU) |
|
Use Scenario: Powers image sensor and ISP in rear-view camera module exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Automotive-grade linear regulator with thermal shutdown and watchdog provides fault-tolerant power domain. Use Value: +150°C thermal shutdown and −40°C to +125°C operation ensure reliability in sealed enclosures; WDI guards against firmware hangs during video streaming. |
Use Scenario: Supplies GPS/GSM processor and cellular modem in connected car telematics gateway. IC Role / Device Role / Timing Role: Regulator with integrated μP reset and HOLD input manages power sequencing during ignition cycling and network handover. Use Value: Self-holding behavior allows VTU to remain powered through brief ignition-off intervals (e.g., gear shift); RESET timeout guarantees controlled reboot after brownout recovery. |
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 |
|---|---|---|---|
| MAX5024SASA | Same SO-EP package and pinout, but includes SET input for adjustable output (2.5V–11V); lacks WDI/watchdog function. | Suitable where programmable output voltage is needed instead of fixed +3.3V; not usable in watchdog-dependent safety-critical designs. | Select MAX5024SASA only if adjustable output is required and watchdog functionality is unnecessary. |
| TL783CKTTR | 3-terminal adjustable regulator (no RESET, no watchdog, no HOLD); 125V max input; 750mA output; TO-263 package. | Lacks integrated supervision features; requires external reset IC and latch circuitry for equivalent functionality. | Choose TL783CKTTR only for cost-sensitive non-safety applications where full integration is not required. |
Compared with MAX5023SASA, MAX5024SASA trades watchdog capability for output adjustability, while TL783CKTTR offers higher current and voltage rating but demands external support circuitry - making MAX5023SASA optimal for compact, self-contained automotive supervisory rails.
Availability
MAX5023SASA is available at Aetrix Electronics and suitable for automotive engine control, body electronics, ADAS camera ECUs, and telematics units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5023SASA 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 automotive power-supply supervision, delivering high-voltage regulation with integrated reset, watchdog, and self-holding control in thermally enhanced SO-EP packages.
FAQ
What is the fixed output voltage of the MAX5023SASA?
The MAX5023SASA provides a factory-trimmed fixed +3.3V output voltage, specified from 2.805V to 2.970V (−7.5% tolerance) across −40°C to +125°C. This value is set internally and does not require external resistors. The 'S' suffix in MAX5023SASA explicitly denotes the +3.3V version with −7.5% reset threshold, distinguishing it from 'L', 'M', and 'T' variants offering +5V or different tolerances.
Does the MAX5023SASA include a watchdog timer?
Yes, the MAX5023SASA includes a dedicated watchdog timer with a nominal 1.6s timeout period (1.12s to 2.08s over temperature). It monitors the WDI pin for transitions and asserts the open-drain RESET output if no valid edge occurs within that window. This feature is exclusive to the MAX5023 family; the MAX5024 variants replace WDI with SET for adjustable output and omit the watchdog function entirely.
How does the HOLD input function in the MAX5023SASA?
The HOLD input in the MAX5023SASA enables a self-holding circuit: when pulled low after EN is asserted, the regulator remains on even if EN subsequently goes low. To shut down, HOLD must be released (allowed to float or pulled high) while EN is low. Internally, HOLD is pulled up to OUT with a 4μA current source - so connecting HOLD directly to OUT achieves the hold state without external components.
What package type is used for the MAX5023SASA?
The MAX5023SASA uses an 8-pin SO-EP (Small Outline–Exposed Pad) package with lead (Pb)-free/RoHS-compliant finish. The exposed pad must be soldered to the PCB ground plane to achieve specified thermal performance (θJA = 41°C/W) and maximum 1538mW power dissipation at +70°C ambient. Land pattern 90-0151 applies per Maxim's package documentation.
What is the reverse-battery protection rating of the MAX5023SASA?
The MAX5023SASA withstands −60V applied to the IN pin relative to GND, protecting against battery misconnection in 12V and 24V automotive systems. This rating is absolute - no external series diode or TVS is required for basic reverse-polarity survival. Reverse input current is limited to ≤10μA at −60V, minimizing leakage-induced battery drain during fault conditions.
MAX5023SASA 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):
- 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
MAX5023SASA FAQ
1.How can I place an order for MAX5023SASA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5023SASA 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 MAX5023SASA reliable?
The price and inventory of MAX5023SASA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5023SASA is usually 5 days.
3.What payment methods are accepted for MAX5023SASA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5023SASA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5023SASA?
MAX5023SASA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5023SASA 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 MAX5023SASA?
For technical support, including MAX5023SASA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5023SASA requirements.
6.How does Aetrix verify that MAX5023SASA is sourced from the original manufacturer or authorized distributors?
All MAX5023SASA 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 MAX5023SASA meets industry standards.
7.What is the process for return or replacement of MAX5023SASA?
All MAX5023SASA units undergo pre-shipment inspection (PSI). If there is an issue with MAX5023SASA, 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 MAX5023SASA part is unused and in its original packaging.
Return procedure for MAX5023SASA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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