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Analog Devices Inc./Maxim Integrated MAX16023LTAS18+T
- Part No.:
- MAX16023LTAS18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16023LTAS18+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,965
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Product details
Overview
MAX16023LTAS18+T from Maxim Integrated is a low-power battery-backup circuit with integrated 1.8V LDO regulator, microprocessor reset supervisor, and automatic VCC-to-battery switchover. It delivers up to 100mA output current, features a 2.93V reset threshold, operates from 1.53V to 5.5V input, and is used to back up SRAM or RTCs during brownout. The device includes power-fail comparator (PFI/PFO), debounced manual reset (MR), and push-pull RESET output.
For engineers reviewing the MAX16023LTAS18+T datasheet, MAX16023LTAS18+T pinout, MAX16023LTAS18+T application, or MAX16023LTAS18+T equivalent, key selection criteria include regulated 1.8V output accuracy (±2.5%), 145ms minimum reset timeout, 4µA typical supply current in active mode, battery-freshness seal functionality, and compatibility with industrial temperature range (–40°C to +85°C) in compact 8-pin TDFN package.
Technical Context
The MAX16023LTAS18+T integrates a low-dropout linear regulator (LDO) with 1.8V fixed output, a precision reset supervisor with 2.93V threshold (±3% over temperature), and a battery switchover circuit that activates when VCC falls below both the reset threshold and VBATT while the LDO enters dropout. Its PFI input monitors external supplies down to 0.6V with 30mV hysteresis, and RESET asserts on VCC undervoltage or MR low signal.
This device implements a battery freshness seal that isolates BATT from internal circuitry until VCC powers up for the first time-ensuring backup battery longevity. The push-pull RESET output drives loads up to 3.2mA at 1.8V with VOL ≤ 0.3V, and the 8-pin TDFN-EP package features an exposed pad thermally connected to GND for enhanced thermal performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | 1.8V ±2.5% (factory-trimmed; ensures stable bias for 1.8V SRAM/RTC) |
| Reset Threshold Voltage | 2.93V (typ), ±3% over –40°C to +85°C; triggers reset before critical logic voltage collapse |
| Supply Current (VCC) | 4µA (typ) at VCC = LDO + 0.5V; enables ultra-low-power backup operation |
| Battery Backup Current | 3.5µA to 5.26µA (VBATT = 3V, no load); minimizes battery drain during extended outages |
| Output Current Capability | 100mA (max); sufficient to power 64KB–256KB SRAM or low-power RTC ICs |
| Reset Timeout Period | 145ms (min); guarantees µP initialization completes before release |
| Operating Temperature Range | –40°C to +85°C; qualified for industrial and automotive-adjacent embedded systems |
Pinout & Package
MAX16023LTAS18+T is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed pad (EP) internally connected to GND. Thermal design requires soldering EP to a large PCB ground plane for reliable operation at full load.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input (1.53V–5.5V); powers LDO and supervisory circuits; bypass with 0.1µF capacitor |
| 2 | BATT | Backup battery input; automatically takes over regulation when VCC drops below reset threshold and VBATT > VCC |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (30kΩ); debounced; initiates reset on falling edge |
| 4 | PFI | Power-fail comparator input; referenced to 0.59V internal threshold; monitors external rail via resistive divider |
| 5 | PFO | Active-low power-fail output; asserts when PFI falls below threshold; provides early warning of supply degradation |
| 6 | GND | Analog/digital ground reference; connects to exposed pad (EP) for thermal and electrical integrity |
| 7 | RESET | Active-low push-pull reset output; drives µP reset pin directly; VOL ≤ 0.3V @ 1mA |
| 8 | OUT | 1.8V regulated LDO output; supplies SRAM/RTC; bypass with 10µF low-ESR capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Battery Freshness Seal | Prevents BATT discharge until first VCC power-up, preserving shelf life of backup battery |
| Integrated Power-Fail Comparator | Monitors auxiliary rails down to 0.6V with 30mV hysteresis-enables early system shutdown |
| Debounced Manual Reset Input | Eliminates need for external RC debounce; supports direct switch-to-GND connection |
| Ultra-Low Quiescent Current | 4µA typical ICC and ≤5.26µA IBATT extend coin-cell life to >10 years in backup mode |
| Factory-Trimmed 1.8V Output | ±2.5% accuracy over temperature ensures reliable 1.8V logic interface without external feedback |
Applications
| SRAM Backup Power | Real-Time Clock (RTC) Supply |
|---|---|
Use Scenario: Maintaining data integrity in static RAM during AC power loss or main supply brownout. IC Role / Device Role / Timing Role: Provides regulated 1.8V standby power and asserts RESET to halt µP access until stable power resumes. Use Value: Prevents SRAM bit corruption by guaranteeing clean power switchover and synchronized reset assertion within 20µs of VCC drop. |
Use Scenario: Sustaining timekeeping function in battery-backed RTC ICs (e.g., DS3231, PCF8563) during extended mains outage. IC Role / Device Role / Timing Role: Supplies precise 1.8V rail and monitors VCC to trigger controlled RTC sleep mode before voltage collapse. Use Value: Enables <1ppm time drift under backup power due to tight 1.8V regulation and sub-5µA quiescent draw. |
| Industrial Control Panel | GPS Tracking Module |
Use Scenario: Preserving configuration registers and calibration data in programmable logic controllers during field power interruptions. IC Role / Device Role / Timing Role: Acts as dual-function supervisor: resets controller CPU and maintains volatile memory via BATT switchover. Use Value: Eliminates need for external reset IC + LDO combo-reducing BOM count and board area by 40%. |
Use Scenario: Enabling fast GPS cold-start recovery after vehicle ignition cycle by retaining almanac and ephemeris data in backup SRAM. IC Role / Device Role / Timing Role: Delivers 100mA 1.8V backup power and generates timed RESET pulse to reinitialize GNSS baseband processor. Use Value: Reduces TTFF (Time-To-First-Fix) from >45s to <15s by avoiding full satellite reacquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-backup supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16024LTBS18+T | 10-pin TDFN; adds CEIN/CEOUT gating and BATT ON indicator; adjustable SET pin unused in fixed-voltage variant | Required when chip-enable signal locking during reset is needed to prevent SRAM write corruption | Select MAX16024LTBS18+T only if CE gating or battery-status indication is mandatory; otherwise MAX16023LTAS18+T offers lower cost and smaller footprint. |
| TPS3808G18DBVR | Single-function reset IC (no LDO); 1.8V reset threshold; 1.5µA IQ; SOT-23-5 package | Requires external 1.8V LDO (e.g., TPS7A05); lacks battery switchover, PFI monitoring, and freshness seal | Choose TPS3808G18DBVR only for space-constrained designs where backup power is handled separately and reset supervision alone suffices. |
Compared with MAX16024LTBS18+T, the MAX16023LTAS18+T saves board area and cost by omitting CE gating-ideal for simpler SRAM/RTC backup. Versus TPS3808G18DBVR, it integrates regulation and switchover, eliminating two external components but occupying more PCB real estate than the SOT-23 solution.
Availability
MAX16023LTAS18+T is available at Aetrix Electronics and suitable for industrial control panels, GPS tracking modules, point-of-sale terminals, and portable medical devices requiring stable component supply across extended product lifecycles.
Supply support for MAX16023LTAS18+T 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The MAX16023/MAX16024 family was designed specifically for low-power, space-constrained battery-backup applications-integrating LDO regulation, reset supervision, and switchover logic into a single die to replace discrete solutions in SRAM and RTC subsystems.
FAQ
What is the exact reset threshold voltage of MAX16023LTAS18+T, and how tightly is it specified?
The MAX16023LTAS18+T has a nominal reset threshold of 2.93V, with a guaranteed range of 2.845V (min) to 3.080V (max) across –40°C to +85°C. This corresponds to the 'S' suffix in the part number table and is factory-trimmed for ±3% tolerance, ensuring reliable reset assertion before 1.8V logic thresholds are violated.
Does MAX16023LTAS18+T support automatic switchover to battery power, and what conditions must be met?
Yes, MAX16023LTAS18+T supports automatic switchover: it engages battery backup when all three conditions are satisfied-VCC falls below the 2.93V reset threshold, VBATT exceeds VCC, and the LDO enters dropout (except for 1.2V version). For the 1.8V variant, dropout occurs when VCC drops within ~150mV of 1.8V output.
Can MAX16023LTAS18+T be used without a backup battery connected?
Yes. If no backup battery is used, connect the BATT pin directly to GND. The device continues to operate normally from VCC, providing 1.8V regulation and reset supervision. The battery freshness seal remains inactive, and all supervisory functions-including RESET, PFO, and MR-remain fully functional.
What is the purpose of the PFI and PFO pins on MAX16023LTAS18+T, and how are they typically configured?
PFI is a dedicated input for monitoring an additional voltage rail (e.g., main 5V supply) using an external resistive divider; PFO is its active-low open-drain output. When PFI voltage falls below 0.59V (typ), PFO pulls low-often tied to MR to trigger early reset or generate µP interrupt. PFI accepts inputs down to 0.6V with 30mV hysteresis for noise immunity.
How does the battery freshness seal work in MAX16023LTAS18+T, and can it be re-enabled after initial power-up?
The battery freshness seal disconnects BATT from internal circuitry until VCC is applied for the first time-preserving battery charge during storage. Once latched, it cannot be re-enabled in normal operation. To restore seal functionality, a specific sequence is required: drive MR > VBATT + 1.2V for ≥3µs while VCC = 0 and OUT = 0-a procedure intended for factory rework, not field use.
MAX16023LTAS18+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 145ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX16023LTAS18+T FAQ
1.How can I place an order for MAX16023LTAS18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16023LTAS18+T 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 MAX16023LTAS18+T reliable?
The price and inventory of MAX16023LTAS18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16023LTAS18+T is usually 5 days.
3.What payment methods are accepted for MAX16023LTAS18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16023LTAS18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16023LTAS18+T?
MAX16023LTAS18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16023LTAS18+T 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 MAX16023LTAS18+T?
For technical support, including MAX16023LTAS18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16023LTAS18+T requirements.
6.How does Aetrix verify that MAX16023LTAS18+T is sourced from the original manufacturer or authorized distributors?
All MAX16023LTAS18+T 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 MAX16023LTAS18+T meets industry standards.
7.What is the process for return or replacement of MAX16023LTAS18+T?
All MAX16023LTAS18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16023LTAS18+T, 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 MAX16023LTAS18+T part is unused and in its original packaging.
Return procedure for MAX16023LTAS18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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