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Analog Devices Inc./Maxim Integrated MAX16023PTAZ18+
- Part No.:
- MAX16023PTAZ18+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16023PTAZ18+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,459
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Product details
Overview
MAX16023PTAZ18+ from Maxim Integrated is a low-power battery-backup circuit with integrated 1.8V LDO, µP reset generator, and automatic VCC/BATT switchover-delivering up to 100mA output current. It features push-pull RESET, 2.32V reset threshold, power-fail comparator (PFI/PFO), debounced manual reset (MR), and operates from 1.53V to 5.5V input. Designed for SRAM/RTC backup in industrial controls and portable equipment where brownout resilience and low quiescent current (4µA typ) are critical.
For engineers reviewing the MAX16023PTAZ18+ datasheet, MAX16023PTAZ18+ pinout, MAX16023PTAZ18+ application, or MAX16023PTAZ18+ equivalent, key selection considerations include its fixed 1.8V regulated output, -40°C to +85°C operation, 8-pin TDFN package with exposed pad, push-pull RESET configuration, and support for battery freshness seal and early power-fail warning via PFI.
Technical Context
The MAX16023PTAZ18+ integrates a low-dropout linear regulator (LDO), microprocessor reset supervisor, and battery switchover logic in a single die. Its reset circuit uses a precision voltage reference with 2.32V threshold (±3% over temperature), 145ms minimum timeout, and glitch-immune MR input with internal 30kΩ pullup.
It implements a dual-supply architecture: VCC powers the LDO during normal operation; when VCC falls below the reset threshold *and* drops below VBATT while in dropout, the device seamlessly transfers regulation to the backup battery. The PFI/PFO comparator monitors external supplies down to 0.6V with 30mV hysteresis and draws power from OUT-ensuring independence from main supply integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | Fixed 1.8V ±3% (1.704V–1.900V at 1mA load); enables direct powering of 1.8V SRAM or RTC without external feedback. |
| Reset Threshold | 2.32V (typ), min 2.243V / max 2.425V; triggers reset before system brownout affects logic-level integrity. |
| Supply Current (VCC) | 4µA (typ) at VCC = LDO + 0.5V, no load; minimizes primary supply drain during long standby. |
| Battery-Backup Current | 3.5µA–5.26µA (typ) at VBATT = 3V, VCC = 0; extends coin-cell life in decades-long memory retention applications. |
| Output Current Capability | 100mA continuous (150mA limit); sufficient for static RAMs up to 1Mb and real-time clocks with I²C/SPI interfaces. |
| Dropout Voltage | 200mV (typ) at 50mA load for 1.8V output; allows operation down to VCC = 2.0V while maintaining regulation. |
| Operating Temperature | -40°C to +85°C; fully specified across industrial temperature range without derating. |
Pinout & Package
MAX16023PTAZ18+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed thermal pad connected internally to GND. The compact footprint supports high-density PCB layouts in space-constrained portable and industrial modules.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input (1.53V–5.5V); bypassed to GND with 0.1µF capacitor for noise immunity and transient response. |
| 2 | BATT | Backup battery input; automatically powers LDO when VCC fails; includes battery freshness seal to preserve shelf life. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (30kΩ); debounced-no external RC required. |
| 4 | PFI | Power-fail comparator input; referenced to 0.590V internal threshold; accepts resistive dividers for monitoring auxiliary rails. |
| 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; EP pad must be soldered to large PCB ground plane for thermal and EMI performance. |
| 7 | RESET | Active-low push-pull reset output; drives µP reset pin directly; 0.3V max VOL at 1mA sink ensures TTL/CMOS compatibility. |
| 8 | OUT | 1.8V regulated LDO output; requires 10µF low-ESR capacitor to GND for stability and load-transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Battery freshness seal | Internally disconnects BATT from OUT until first VCC power-up-preserves backup battery charge for >10-year shelf life. |
| Push-pull RESET output | Eliminates need for external pullup resistor; reduces BOM count and improves noise immunity in noisy environments. |
| Power-fail comparator (PFI/PFO) | Monitors secondary voltages down to 0.6V with 30mV hysteresis; powered from OUT-remains functional during VCC brownout. |
| Debounced MR input | 100ns glitch immunity and internal pullup enable direct switch connection-no external debounce circuitry required. |
| Ultra-low battery mode current | 3.5µA typical IBATT at VBATT = 3V ensures >10-year coin-cell operation for SRAM backup in infrequently powered systems. |
Applications
| Industrial Control PLCs | GPS Tracking Modules |
|---|---|
|
Use Scenario: Maintaining volatile SRAM contents during mains power interruption or vehicle ignition cycling. IC Role / Device Role / Timing Role: Provides regulated 1.8V backup power and synchronized reset assertion to prevent memory corruption during brownout. Use Value: Enables deterministic recovery after power loss-no firmware reinitialization or data reload required upon restoration. |
Use Scenario: Preserving GPS almanac, ephemeris, and last-known position during battery replacement or deep sleep. IC Role / Device Role / Timing Role: Supplies stable 1.8V to RTC and SRAM while asserting RESET only when VCC drops below 2.32V-avoiding spurious resets from transients. Use Value: Reduces time-to-first-fix (TTFF) from cold start to warm start by retaining satellite data across power cycles. |
| Point-of-Sale Terminals | Set-Top Box Memory Backup |
|
Use Scenario: Securing transaction logs and encryption keys in retail terminals during brief AC outages or battery swaps. IC Role / Device Role / Timing Role: Switchover to BATT occurs within dropout detection window; PFO signals impending failure to trigger log flush. Use Value: Guarantees atomic write completion and prevents financial data loss-even during sub-100ms dips in 5V rail. |
Use Scenario: Retaining channel lineup, parental controls, and firmware state in consumer STBs during unplanned power loss. IC Role / Device Role / Timing Role: Delivers 100mA at 1.8V to parallel SRAM banks; RESET holds µP in reset until VCC stabilizes above 2.32V. Use Value: Eliminates "channel reset" user complaints-system resumes exactly where it left off after power restoration. |
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 version. | Required when chip-enable signal locking during reset is needed to prevent SRAM write corruption. | Select MAX16024LTBS18+T if CE gating or battery-status indication is mandatory; otherwise MAX16023PTAZ18+ offers smaller footprint and lower cost. |
| TPS3808G18DBVR | Single-function reset IC (no LDO, no battery switchover); 1.8V reset threshold; 350nA quiescent current; SOT-23-5. | Only provides reset supervision-requires external LDO and battery diode-OR circuit for backup functionality. | Choose TPS3808G18DBVR only when discrete implementation is preferred for cost or layout flexibility; MAX16023PTAZ18+ integrates all three functions in one die. |
Compared with MAX16024LTBS18+T, MAX16023PTAZ18+ saves board area and BOM count by omitting CE gating-ideal for cost-sensitive SRAM backup where signal integrity during reset is managed externally. Versus TPS3808G18DBVR, it eliminates external components but trades ultra-low quiescent current for full integration.
Availability
MAX16023PTAZ18+ is available at Aetrix Electronics and suitable for industrial control PLCs, GPS tracking modules, point-of-sale terminals, and set-top box memory backup requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX16023PTAZ18+ 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 leader in precision analog, mixed-signal, and power-management ICs, serving industrial, communications, computing, and consumer markets with high-reliability solutions.
The MAX16023/MAX16024 family was designed specifically for robust, low-power memory backup in mission-critical systems-integrating LDO regulation, reset supervision, and battery switchover into a single small-outline package.
FAQ
What is the function of the PFI and PFO pins on the MAX16023PTAZ18+?
The PFI (Power-Fail Input) pin monitors an external voltage rail via a resistive divider and compares it to an internal 0.590V reference. When the divided voltage falls below this threshold, the PFO (Power-Fail Output) pin asserts low-providing early warning of impending power failure. This allows the host µP to execute an orderly shutdown before VCC collapses. In MAX16023PTAZ18+, PFO is active-low and powered from the regulated OUT rail-ensuring functionality even during main supply brownout.
Does the MAX16023PTAZ18+ support battery switchover without external components?
Yes. The MAX16023PTAZ18+ performs fully autonomous VCC-to-BATT switchover using internal circuitry-no external diodes, MOSFETs, or control logic are required. Switchover activates when three conditions are met: VCC falls below the 2.32V reset threshold, VCC drops below VBATT, and the LDO enters dropout. The battery freshness seal further ensures zero leakage until first power-up, preserving shelf life.
What is the significance of the 'PTA' prefix and 'Z' suffix in MAX16023PTAZ18+?
In MAX16023PTAZ18+, 'PTA' denotes open-drain RESET output (P), temperature range –40°C to +85°C (T), and push-pull or open-drain option (A = push-pull for MAX16023-but note: per Part Number Table, 'PTA' indicates open-drain; correction: 'PTA' = P=Open-Drain, T=Temp, A=Reset Threshold Code 'L'; however, 'Z' maps to 2.32V threshold per Table 1). The '18' specifies 1.8V fixed output. The '+' indicates lead-free/RoHS-compliant packaging. Thus, MAX16023PTAZ18+ is an open-drain RESET, 2.32V threshold, 1.8V output variant in 8-pin TDFN.
Can the MAX16023PTAZ18+ be used without a backup battery?
Yes. If no backup battery is required, connect the BATT pin directly to GND. The device continues to operate as a 1.8V LDO with reset supervision and power-fail monitoring-retaining all core functionality except battery switchover. The battery freshness seal remains inactive, and the LDO is powered solely by VCC. This configuration is valid for applications needing only regulated 1.8V supply and reliable reset generation.
How does the manual reset (MR) pin behave during power-up and brownout?
The MR pin on MAX16023PTAZ18+ is active-low with internal 30kΩ pullup to VCC. Pulling MR low asserts RESET immediately, regardless of VCC level. After MR returns high, RESET remains asserted for ≥145ms (tRP) to ensure µP initialization completes. During brownout, MR retains functionality-allowing external override even when VCC is marginal. Glitch immunity of 100ns prevents false triggers from noise, and no external debounce is needed due to integrated filtering.
MAX16023PTAZ18+ 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:
- 2.32V
- Output:
- Open Drain or Open Collector
- 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)
MAX16023PTAZ18+ FAQ
1.How can I place an order for MAX16023PTAZ18+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16023PTAZ18+ 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 MAX16023PTAZ18+ reliable?
The price and inventory of MAX16023PTAZ18+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16023PTAZ18+ is usually 5 days.
3.What payment methods are accepted for MAX16023PTAZ18+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16023PTAZ18+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16023PTAZ18+?
MAX16023PTAZ18+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16023PTAZ18+ 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 MAX16023PTAZ18+?
For technical support, including MAX16023PTAZ18+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16023PTAZ18+ requirements.
6.How does Aetrix verify that MAX16023PTAZ18+ is sourced from the original manufacturer or authorized distributors?
All MAX16023PTAZ18+ 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 MAX16023PTAZ18+ meets industry standards.
7.What is the process for return or replacement of MAX16023PTAZ18+?
All MAX16023PTAZ18+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16023PTAZ18+, 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 MAX16023PTAZ18+ part is unused and in its original packaging.
Return procedure for MAX16023PTAZ18+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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