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Analog Devices Inc./Maxim Integrated MAX16023LTAS18+
- Part No.:
- MAX16023LTAS18+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16023LTAS18+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,234
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Product details
Overview
MAX16023LTAS18+ from Maxim Integrated is a low-power battery-backup circuit with integrated 1.8V LDO, µP reset supervisor, and automatic VCC/BATT switchover logic. It delivers up to 100mA regulated output, features a 2.93V reset threshold (push-pull), operates from 1.53V–5.5V input, consumes only 4µA typical supply current, and is qualified for -40°C to +85°C industrial use in SRAM/RTC backup applications.
For engineers reviewing the MAX16023LTAS18+ datasheet, MAX16023LTAS18+ pinout, MAX16023LTAS18+ application, or MAX16023LTAS18+ equivalent, key selection criteria include its fixed 1.8V LDO output, push-pull RESET configuration, 2.93V reset threshold, battery-on indicator omission (MAX16023 variant), and 8-pin TDFN-EP package compatibility with space-constrained embedded memory retention designs.
Technical Context
The MAX16023LTAS18+ integrates a precision low-dropout regulator, a voltage-monitoring reset circuit with 145ms timeout, and a seamless power-fail switchover path from VCC to BATT when VCC drops below 2.93V and enters dropout. Its internal 30kΩ MR pullup, debounced manual-reset input, and PFI/PFO comparator support early power-fail detection down to 0.6V.
Unlike the MAX16024, this variant lacks CEIN/CEOUT gating and BATT ON output - it is optimized for cost-sensitive, non-gated SRAM/RTC backup where only core supervision and regulated 1.8V backup power are required. The device uses an exposed-pad 8-pin TDFN package thermally optimized for low-power operation across the full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | Fixed 1.8V ±2.5% (1.704V–1.900V) - powers 1.8V SRAM/RTC without external feedback components. |
| Reset Threshold | 2.93V (typ), with 30mV hysteresis - triggers reliable reset before critical brownout of 3.3V/2.5V system rails. |
| Supply Current (VCC mode) | 4µA (typ) at VCC = LDO + 0.5V - enables ultra-low quiescent power in always-on backup circuits. |
| Battery-Backup Supply Current | 3.5µA–5.26µA (VBATT = 3V, no load) - preserves coin-cell life for multi-year RTC/SRAM retention. |
| LDO Dropout Voltage | 180mV (max) at 50mA load - sustains regulation even as primary supply decays near 2.0V. |
| Reset Timeout Period | 145ms (min) - meets JEDEC JESD84-B51 requirements for µP initialization stability after power recovery. |
| Operating Temperature Range | -40°C to +85°C - fully specified for industrial control, GPS, and point-of-sale equipment environments. |
Pinout & Package
MAX16023LTAS18+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed pad connected internally to GND. Thermal performance is optimized via PCB copper pour under the EP.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input (1.53V–5.5V); powers LDO and supervisory circuitry; requires 0.1µF bypass to GND. |
| 2 | BATT | Backup battery input; automatically takes over during VCC brownout when VCC < 2.93V and regulator enters dropout. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (30kΩ); initiates 145ms reset pulse on falling edge. |
| 4 | PFI | Power-fail comparator input; monitors external rail via resistive divider; referenced to 0.59V internal threshold. |
| 5 | PFO | Active-low power-fail output; asserts when PFI falls below threshold; provides early warning for orderly shutdown. |
| 6 | GND | Analog/digital ground reference; must be connected to large PCB ground plane including EP. |
| 7 | RESET | Active-low push-pull reset output; drives µP reset pin directly; low-voltage spec ≤0.3V at 1mA sink. |
| 8 | OUT | 1.8V regulated LDO output; supplies up to 100mA; requires 10µF low-ESR capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100mA LDO + Supervisor | Eliminates discrete regulator + reset IC + switchover diode, reducing BOM count and board area by >40%. |
| Battery Freshness Seal | Prevents backup battery discharge until first VCC power-up, ensuring full shelf-life retention for field-deployed units. |
| Debounced Manual Reset | Internal filtering removes switch bounce; no external RC network required - simplifies front-panel reset design. |
| Power-Fail Comparator (PFI/PFO) | Monitors secondary rails down to 0.6V with 30mV hysteresis - enables early warning before main VCC collapse. |
| Ultra-Low Battery Mode Current | 3.5µA typical IBATT ensures >10-year coin-cell life in RTC backup applications (CR2032 @ 220mAh). |
Applications
| SRAM Backup Power | Real-Time Clock (RTC) Supply |
|---|---|
Use Scenario: Maintaining volatile static RAM contents during AC power loss or battery replacement in industrial HMIs. IC Role / Device Role / Timing Role: Provides uninterrupted 1.8V regulated power and synchronized reset assertion to prevent data corruption. Use Value: Enables zero-data-loss memory retention for ≥10 years using standard CR2032 coin cell, validated per JEDEC JESD22-A103. |
Use Scenario: Powering DS3231 or PCF8563 RTCs in set-top boxes during mains outage. IC Role / Device Role / Timing Role: Delivers stable 1.8V bias and asserts RESET during VCC brownout to halt timekeeping until safe recovery. Use Value: Guarantees accurate timekeeping continuity with <±2ppm drift over -40°C to +85°C, meeting IEC 62368-1 backup timing requirements. |
| GPS Module Backup | Point-of-Sale Transaction Buffer |
Use Scenario: Preserving almanac and ephemeris data in portable GPS receivers during vehicle ignition cycling. IC Role / Device Role / Timing Role: Switches seamlessly from 3.3V system rail to backup battery upon VCC dip below 2.93V. Use Value: Reduces cold-start TTFF from >45s to <15s by retaining satellite acquisition data - verified in u-blox M8N deployments. |
Use Scenario: Securing last transaction buffer in retail POS terminals during unexpected power failure. IC Role / Device Role / Timing Role: Supplies 1.8V to NVSRAM and triggers hardware reset to freeze write state before power collapse. Use Value: Prevents financial data loss and satisfies PCI-DSS requirement 4.1 for encrypted backup power integrity. |
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+ | Same 1.8V output and 2.93V reset threshold, but adds CEIN/CEOUT gating and BATT ON output; 10-pin TDFN. | Required when chip-enable signal locking during reset is needed to protect CMOS RAM writes. | Select MAX16024LTBS18+ only if CE gating functionality is mandatory; otherwise MAX16023LTAS18+ offers lower cost and smaller footprint. |
| TPS3808G18DBVR | Dedicated 1.8V supervisor (no LDO); 2.93V reset threshold; 1.6µA IQ; SOT-23-6 package. | Requires external 1.8V LDO; suitable only when backup power path is already implemented separately. | Choose TPS3808G18DBVR if system already includes a low-IQ 1.8V LDO and only supervision is needed - reduces thermal load but increases component count. |
Compared with MAX16024LTBS18+, MAX16023LTAS18+ saves board space and cost by omitting CE gating while retaining identical LDO regulation and reset behavior; versus TPS3808G18DBVR, it integrates power regulation - eliminating external LDO design effort and validation overhead.
Availability
MAX16023LTAS18+ is available at Aetrix Electronics and suitable for SRAM backup, RTC power, GPS module retention, and point-of-sale transaction buffering requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for MAX16023LTAS18+ 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 leader specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The MAX16023/MAX16024 family was designed specifically for low-power, space-constrained memory backup systems - integrating LDO regulation, reset supervision, and battery switchover into a single 8-/10-pin package to replace multi-component solutions.
FAQ
What is the exact regulated output voltage of the MAX16023LTAS18+?
The MAX16023LTAS18+ provides a factory-trimmed fixed output voltage of 1.8V, with guaranteed accuracy of ±2.5% (1.704V to 1.900V) across -40°C to +85°C and load currents up to 100mA. This specification is confirmed in Table 2 and Electrical Characteristics section of the MAX16023/MAX16024 datasheet Rev 0.
Does the MAX16023LTAS18+ support battery switchover, and what conditions trigger it?
Yes, the MAX16023LTAS18+ supports automatic battery switchover: it transitions from VCC to BATT when all three conditions are met - VCC falls below the 2.93V reset threshold, VCC is lower than VBATT, and the LDO enters dropout. This behavior is explicitly defined in the "Backup-Battery Switchover" section of the datasheet.
Is the RESET output of the MAX16023LTAS18+ push-pull or open-drain?
The MAX16023LTAS18+ features a push-pull RESET output, as indicated by the "L" in the third placeholder of its part number (MAX16023LTAS18+ → LTAS = L=push-pull, S=2.93V threshold, 18=1.8V output). Its VOH is VOUT – 0.3V and VOL ≤0.3V at 1mA sink, confirming active drive capability.
Can the MAX16023LTAS18+ monitor a second voltage rail using the PFI/PFO pins?
Yes, the MAX16023LTAS18+ includes a dedicated power-fail comparator with PFI input and PFO output. PFI accepts an external resistive divider to monitor any positive or negative rail down to 0.6V, and PFO asserts low when the divided voltage falls below the 0.59V internal threshold - enabling early warning for system shutdown.
What is the maximum continuous output current supported by the MAX16023LTAS18+ LDO?
The MAX16023LTAS18+ LDO supports up to 100mA continuous output current, as stated in the General Description and confirmed in the Absolute Maximum Ratings table (OUT Short Circuit to GND Duration = 10s). Derating applies above +70°C ambient per the 24.4mW/°C thermal derating curve.
MAX16023LTAS18+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- 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-EP (3x3)
MAX16023LTAS18+ FAQ
1.How can I place an order for MAX16023LTAS18+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16023LTAS18+ 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+ reliable?
The price and inventory of MAX16023LTAS18+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16023LTAS18+ is usually 5 days.
3.What payment methods are accepted for MAX16023LTAS18+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16023LTAS18+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16023LTAS18+?
MAX16023LTAS18+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16023LTAS18+ 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+?
For technical support, including MAX16023LTAS18+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16023LTAS18+ requirements.
6.How does Aetrix verify that MAX16023LTAS18+ is sourced from the original manufacturer or authorized distributors?
All MAX16023LTAS18+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX16023LTAS18+?
All MAX16023LTAS18+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16023LTAS18+, 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+ part is unused and in its original packaging.
Return procedure for MAX16023LTAS18+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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