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Analog Devices Inc./Maxim Integrated MAX5024SASA+
- Part No.:
- MAX5024SASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5024SASA+.pdf
- Description:
- IC REG LIN POS ADJ 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:175
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Product details
Overview
The MAX5024SASA+ from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset supervisor and adjustable output voltage capability. It operates from +6.5V to +65V input, delivers up to 150mA output current, features 60μA no-load quiescent current, -60V reverse-battery protection, and is qualified for automotive applications (-40°C to +125°C). It is used in fire/smoke alarms and industrial control systems requiring robust, wide-input-voltage power regulation.
For engineers reviewing the MAX5024SASA+ datasheet, MAX5024SASA+ pinout, MAX5024SASA+ application, or MAX5024SASA+ equivalent, key selection criteria include its fixed +3.3V output (S-suffix), SET-input-based adjustability, HOLD-enabled self-holding functionality, and automotive-grade thermal/overvoltage protection.
Technical Context
The MAX5024SASA+ implements a BiCMOS linear regulator architecture with internal bandgap reference and feedback amplifier. Its SET pin enables dual-mode operation: grounded for preset +3.3V output or connected via resistive divider for adjustable output (2.5V–11V), with VSET = 1.248V ±25mV.
It integrates an active-low open-drain RESET output that asserts when VOUT falls below 2.805V–2.970V (−7.5% threshold for S-suffix), with 140–260ms timeout. The HOLD input provides latch-on behavior without external components, while EN enables standard on/off control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +6.5V to +65V - supports direct connection to automotive battery rails including load-dump transients. |
| Output Voltage | +3.3V (fixed, S-suffix) - tightly regulated ±3.4% over temperature and load (3.168V–3.432V). |
| Max Output Current | 150mA - guaranteed continuous delivery under thermal limits at TA ≤ +70°C with exposed pad soldered. |
| Quiescent Current | 58–140μA - enables always-on operation in low-power security and alarm systems. |
| Reverse-Battery Protection | -60V - withstands jump-start polarity reversal without damage or latch-up. |
| Dropout Voltage | 0.9–1.5V @ 150mA - allows regulation down to VIN = VOUT + 1.5V, critical for low-headroom 12V systems. |
| Reset Threshold | 2.805V–2.970V (−7.5%) - precise brownout detection aligned to +3.3V μP supply tolerance. |
| Operating Temperature | -40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive use. |
Pinout & Package
MAX5024SASA+ uses an 8-pin SO-EP (Small Outline–Exposed Pad) package with thermally enhanced copper pad soldered to PCB ground plane for 1.5W dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +6.5V to +65V; requires 10μF bypass to GND for stability and transient suppression. |
| 2 EN | Enable Input (active-high) | Pull ≥2.4V to enable; internally pulled down with 5MΩ resistor; controls primary ON/OFF state. |
| 3 GND | Ground / Thermal Heatsink | Reference node and primary thermal path; must be soldered to large copper area for thermal performance. |
| 4 RESET | Active-Low Open-Drain Reset Output | Asserts low when VOUT < 2.97V; sinks up to 3.2mA; requires external pullup for μP reset interface. |
| 5 HOLD | Hold Input (active-low) | When pulled low after EN activation, maintains regulator ON even if EN returns low - enables self-holding. |
| 6 N.C. | No Connection | Not bonded; leave unconnected; no electrical function. |
| 7 SET | Feedback Reference Input | Grounded for +3.3V fixed output; connected to resistor divider for adjustable mode (2.5V–11V). |
| 8 OUT | Regulator Output | Delivers regulated +3.3V; requires ≥15μF output capacitor (ESR < 0.5Ω) for stability. |
| EP | Exposed Pad | Internally connected to GND; mandatory solder connection to PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Mode Output Configuration | Fixed +3.3V (SET = GND) or adjustable 2.5V–11V (SET = resistor divider) - eliminates need for separate regulators across product variants. |
| Integrated μP Reset Supervisor | Monitors own VOUT with −7.5% threshold (2.805V–2.970V) and 140–260ms timeout - replaces discrete reset IC in space-constrained designs. |
| Self-Holding Circuit Support | HOLD input latches regulator ON after initial EN assertion - enables ignition-controlled power sequencing without external latch components. |
| Automotive-Grade Robustness | -60V reverse-battery rating, 150°C thermal shutdown with 20°C hysteresis, and −40°C to +125°C operation - meets harsh vehicle environment requirements. |
| Low-Power Shutdown Mode | 6–16μA shutdown current when EN ≤ 0.4V - preserves battery life in always-connected telematics and alarm systems. |
Applications
| Fire/Smoke Alarms | Automotive Body Control Modules |
|---|---|
Use Scenario: Standby power supply for smoke sensor ICs and wireless transceivers in battery-backed residential alarm panels. IC Role / Device Role / Timing Role: Primary 3.3V rail regulator with brownout detection to trigger system reset before sensor data corruption. Use Value: 60μA quiescent current extends 10-year lithium battery life; -60V reverse protection prevents field failure during service. | Use Scenario: Powering CAN transceivers and microcontrollers in door modules exposed to 12V battery fluctuations and load dumps. IC Role / Device Role / Timing Role: High-voltage linear regulator with integrated reset, enabling single-chip power and supervision for distributed ECUs. Use Value: 65V input range handles ISO 7637-2 pulse 5a (load dump); HOLD input simplifies ignition-switched power architecture. |
| Industrial PLC I/O Modules | Home Security Control Panels |
Use Scenario: Providing isolated 3.3V logic supply for digital input conditioning circuits in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Main regulator with reverse-polarity and thermal fault protection in unattended factory-floor equipment. Use Value: Guaranteed 150mA output supports multiple optocouplers; SO-EP package dissipates heat without heatsink in confined enclosures. | Use Scenario: Powering motion sensors, keypad interfaces, and GSM modems in 24/7 monitored security hubs. IC Role / Device Role / Timing Role: Always-on regulator with precise reset threshold to maintain firmware integrity during AC/DC adapter brownouts. Use Value: 2.97V reset threshold aligns with 3.3V μP VDD min spec; 140–260ms timeout prevents nuisance resets during brief dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5024TASA+ | +3.3V output with −12.5% reset threshold (2.970V–3.135V); identical pinout and package. | Suitable where deeper brownout margin is required before reset assertion. | Select MAX5024TASA+ when system must tolerate larger VOUT sag before initiating reset. |
| TLV71333PDBVR | Lower input range (up to +18V), no reset or HOLD functions, 300mA output, SOT-23-5 package. | Limited to low-voltage industrial or consumer applications without automotive transients or supervision needs. | Choose TLV71333PDBVR only for cost-sensitive, non-automotive designs with VIN < +18V and no reset/HOLD requirement. |
Compared with MAX5024TASA+, the MAX5024SASA+ offers tighter reset threshold alignment for standard +3.3V μP supplies; versus TLV71333PDBVR, it provides essential automotive-grade input ruggedness and integrated supervision-neither is pin-compatible nor drop-in replaceable.
Availability
MAX5024SASA+ is available at Aetrix Electronics and suitable for fire/smoke alarms, automotive body electronics, and industrial PLC I/O modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5024SASA+ 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 demanding industrial, automotive, and communications applications.
The MAX5023/MAX5024 product line delivers high-voltage linear regulators with integrated reset and supervision for automotive and safety-critical systems operating from 6.5V to 65V.
FAQ
What output voltage does the MAX5024SASA+ deliver?
The MAX5024SASA+ delivers a fixed +3.3V output voltage. This is determined by the "S" suffix in the part number, which selects the −7.5% reset threshold variant and corresponds to the preset +3.3V regulator output. When the SET pin is grounded, the device operates in fixed-output mode with guaranteed output of 3.168V to 3.432V across load (1mA–150mA) and temperature (−40°C to +125°C). The MAX5024SASA+ does not require external resistors to achieve this voltage.
How does the HOLD input function on the MAX5024SASA+?
The HOLD input on the MAX5024SASA+ enables self-holding behavior: when pulled low *after* EN is asserted high, the regulator remains ON even if EN is subsequently driven low. To shut down the device, 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. This feature eliminates external latch circuitry in ignition-switched automotive applications and is fully supported in the MAX5024SASA+'s SO-EP package.
Does the MAX5024SASA+ include a watchdog timer?
No, the MAX5024SASA+ does not include a watchdog timer. The watchdog timer (WDI pin, 1.6s timeout) is exclusive to the MAX5023 family (e.g., MAX5023SASA+). The MAX5024SASA+ substitutes the WDI pin with the SET pin for output voltage configuration. Pin 7 on the MAX5024SASA+ is labeled SET and functions solely for fixed/adjustable output selection - it has no timing or monitoring capability. Confusion may arise from shared package and naming, but functional differentiation is explicit in the datasheet selector guide.
What thermal performance can be expected from the MAX5024SASA+ in a typical PCB layout?
With the exposed pad (EP) soldered to ≥1 in² of PCB copper ground plane, the MAX5024SASA+ achieves θJA = 41°C/W and θJC = 2°C/W. At +70°C ambient, it dissipates up to 1.538W continuously; derating is 19.2mW/°C above +70°C. For example, at +95°C ambient, allowable dissipation drops to ~1.057W, supporting ~117mA into +5V output from +14V input. Performance assumes proper thermal vias under EP and adherence to Maxim's land pattern (90-0151). Without exposed-pad soldering, thermal performance degrades significantly.
Can the MAX5024SASA+ be used with ceramic output capacitors?
Yes, the MAX5024SASA+ is compatible with ceramic output capacitors, but selection is critical. Use X7R or X5R dielectrics with ≥15μF capacitance and ESR < 0.5Ω across the full −40°C to +125°C range. Z5U or Y5V ceramics are not recommended below −10°C due to capacitance collapse; in those cases, ≥22μF is required. A 15μF X7R capacitor ensures stability, load-transient response, and PSRR performance per the datasheet. Avoid NP0/C0G for bulk output filtering due to low capacitance density.
MAX5024SASA+ 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:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 2.5V (3.3V)
- Voltage - Output (Max):
- 11V
- 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
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX5024SASA+ FAQ
1.How can I place an order for MAX5024SASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5024SASA+ 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 MAX5024SASA+ reliable?
The price and inventory of MAX5024SASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5024SASA+ is usually 5 days.
3.What payment methods are accepted for MAX5024SASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5024SASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5024SASA+?
MAX5024SASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5024SASA+ 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 MAX5024SASA+?
For technical support, including MAX5024SASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5024SASA+ requirements.
6.How does Aetrix verify that MAX5024SASA+ is sourced from the original manufacturer or authorized distributors?
All MAX5024SASA+ 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 MAX5024SASA+ meets industry standards.
7.What is the process for return or replacement of MAX5024SASA+?
All MAX5024SASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5024SASA+, 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 MAX5024SASA+ part is unused and in its original packaging.
Return procedure for MAX5024SASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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