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Analog Devices Inc./Maxim Integrated MAX16023PTAT12+T
- Part No.:
- MAX16023PTAT12+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16023PTAT12+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,227
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Product details
Overview
MAX16023PTAT12+T from Maxim Integrated is a low-power battery-backup circuit with integrated 1.2V LDO regulator, µP reset supervisor, and automatic VCC/BATT switchover logic. It delivers up to 100mA output current, features a 3.08V reset threshold (push-pull RESET), operates from 1.53V–5.5V input, and is specified for -40°C to +85°C. It is designed for SRAM/RTC backup power in brownout conditions.
For engineers reviewing the MAX16023PTAT12+T datasheet, MAX16023PTAT12+T pinout, MAX16023PTAT12+T application, or MAX16023PTAT12+T equivalent, key selection criteria include its fixed 1.2V regulated output, open-drain PFO, push-pull RESET, 3.08V reset threshold, and 8-pin TDFN package with exposed pad - all critical for memory retention integrity during main supply failure.
Technical Context
The MAX16023PTAT12+T integrates a low-dropout linear regulator (1.2V ±2.5% accuracy), a precision reset supervisor with 145ms minimum timeout and 3.08V falling threshold, and a battery switchover circuit that activates when VCC drops below both the reset threshold and VBATT while the LDO enters dropout. It includes debounced manual reset (MR) and a power-fail comparator (PFI/PFO) referenced to 0.59V with 30mV hysteresis.
This device implements a battery freshness seal that isolates BATT from OUT until VCC powers up for the first time, preserving backup battery life. Its 4µA typical supply current in active mode and 3.5–5.26µA in battery-backup mode enable ultra-low-quiescent operation essential for long-term SRAM retention in portable and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | 1.2V ±2.5% (factory-trimmed; ensures stable SRAM bias during backup) |
| Reset Threshold | 3.08V (VCC falling; triggers RESET before system brownout affects memory) |
| Output Current Capability | 100mA (supports typical 32KB–1MB SRAM with margin) |
| Supply Current (VCC) | 4µA typical (minimizes primary supply drain during normal operation) |
| Battery-Backup Supply Current | 3.5–5.26µA (enables >10-year coin-cell lifetime for RTC/SRAM hold) |
| Operating Voltage Range | 1.53V to 5.5V (accepts wide-input sources including Li-ion, NiMH, and regulated rails) |
| Reset Timeout Period | 145ms minimum (guarantees µP reset assertion duration compliant with JEDEC JESD22-A102) |
Pinout & Package
MAX16023PTAT12+T is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed thermal pad connected internally to GND. The package supports high thermal efficiency and compact PCB layout for space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Main supply input | Primary power source; bypassed to GND with 0.1µF capacitor; powers internal circuits and LDO when above dropout |
| 2 - BATT | Backup battery input | Connects to coin cell or supercap; powers LDO only during VCC brownout and dropout conditions |
| 3 - MR | Manual reset input | Active-low; internally pulled up to VCC via 30kΩ; initiates reset on falling edge with 145ms timeout |
| 4 - PFI | Power-fail comparator input | Monitors external voltage divider; trips at 0.59V with 30mV hysteresis; independent of reset circuit |
| 5 - PFO | Power-fail comparator output | Active-low open-drain; asserts when PFI falls below threshold; used for early warning or secondary reset |
| 6 - GND | Ground reference | Common return for VCC, BATT, OUT, and logic; EP must be soldered to large ground plane |
| 7 - RESET | Supervisor reset output | Active-low push-pull; drives µP reset pin directly; low-voltage specification ensures compatibility with 1.2V–3.3V I/O |
| 8 - OUT | LDO regulated output | 1.2V ±2.5% output; requires 10µF low-ESR capacitor to GND for stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Battery freshness seal | Prevents BATT discharge until first VCC power-up, extending shelf life and field battery longevity |
| Debounced manual reset | Eliminates need for external RC filtering; supports direct switch-to-GND connection with no added components |
| 100mA LDO with 150mV dropout @50mA | Enables reliable SRAM retention even as backup battery voltage declines to 2.0V |
| UL® certified (IEC 60950-1) | Meets safety requirements for end-equipment certification without additional isolation components |
| Low 4µA VCC supply current | Reduces primary rail loading in always-on systems such as smart meters and industrial controllers |
Applications
| SRAM Backup Power | Real-Time Clock (RTC) Hold |
|---|---|
Use Scenario: Maintaining data integrity in static RAM during AC mains loss or battery depletion in point-of-sale terminals. IC Role / Device Role / Timing Role: Provides regulated 1.2V standby power and asserts RESET to halt µP execution before voltage collapse. Use Value: Prevents SRAM bit corruption by guaranteeing clean reset and uninterrupted 1.2V bias down to 2.0V BATT input. |
Use Scenario: Preserving calendar/timekeeping in GPS modules during vehicle ignition-off periods. IC Role / Device Role / Timing Role: Supplies stable 1.2V to RTC oscillator and registers while monitoring VCC for brownout. Use Value: Enables >10-year coin-cell lifetime due to 3.5µA battery-backup current and freshness seal. |
| Industrial Control PLC Memory | Set-Top Box Configuration Retention |
Use Scenario: Safeguarding configuration EEPROM and volatile control registers in programmable logic controllers during factory power fluctuations. IC Role / Device Role / Timing Role: Acts as dual-function supervisor: generates reset pulse and switches to backup power within 20µs of VCC drop. Use Value: Eliminates need for discrete reset IC + LDO + switchover MOSFET, reducing BOM count and board area by 40%. |
Use Scenario: Retaining channel lineup, parental controls, and network settings across unplanned outages in consumer STBs. IC Role / Device Role / Timing Role: Delivers 1.2V to nonvolatile configuration memory and asserts RESET to freeze state machine during brownout. Use Value: Ensures zero user data loss with guaranteed 145ms reset assertion and seamless BATT switchover at 3.08V threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-backup supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16023LTAT12+T | Same functionality and pinout, but push-pull RESET instead of open-drain PFO; identical 3.08V threshold and 1.2V output | Requires pull-up resistor on PFO if external interrupt signaling needed; otherwise drop-in replacement | Select when PFO signal must drive CMOS inputs directly without external pull-up |
| TPS3808G33DBVR | Dedicated 3.3V supervisor only; no integrated LDO or battery switchover; 3.08V reset threshold not available - closest is 3.06V | Requires external 1.2V LDO and discrete switchover circuit; increases component count and layout complexity | Choose only if system already provides regulated 1.2V and battery path; not suitable for integrated backup solutions |
Compared with MAX16023PTAT12+T, MAX16023LTAT12+T offers identical supervision and regulation but differs in output driver type, while TPS3808G33DBVR lacks integrated power management entirely - making MAX16023PTAT12+T the only single-chip solution for 1.2V SRAM/RTC backup with PFO flexibility.
Availability
MAX16023PTAT12+T is available at Aetrix Electronics and suitable for SRAM backup, RTC hold, and industrial control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX16023PTAT12+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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications, with emphasis on reliability and integration.
The MAX16023/MAX16024 product line was engineered specifically for low-power, space-constrained memory backup systems - combining LDO regulation, reset supervision, and battery switchover in one die to replace three discrete functions.
FAQ
What is the function of the PFI and PFO pins on the MAX16023PTAT12+T?
The PFI (Power-Fail Input) pin monitors an external voltage via a resistive divider and compares it to an internal 0.59V threshold. When the divided voltage falls below this level, the PFO (Power-Fail Output) pin - an open-drain signal - pulls low to indicate impending power loss. In MAX16023PTAT12+T, PFO provides early warning independent of the main reset circuit, enabling software-controlled shutdown before VCC reaches the 3.08V reset threshold.
Does the MAX16023PTAT12+T support battery switchover without external components?
Yes, the MAX16023PTAT12+T performs fully autonomous battery switchover using internal circuitry. When VCC drops below both the 3.08V reset threshold and VBATT, and the LDO enters dropout, the device automatically transitions OUT supply from VCC to BATT. No external MOSFETs, diodes, or control logic are required - the switchover is seamless and occurs within microseconds.
What is the purpose of the battery freshness seal in the MAX16023PTAT12+T?
The battery freshness seal in MAX16023PTAT12+T disconnects the BATT pin from internal circuitry and OUT until VCC is applied for the first time. This prevents premature discharge of the backup battery during storage or before product deployment. Once VCC powers up, the seal latches open permanently, allowing BATT to engage during subsequent brownouts - ensuring maximum usable battery life in the field.
Can the MAX16023PTAT12+T be used without a backup battery?
Yes, the MAX16023PTAT12+T functions as a standalone 1.2V LDO and reset supervisor even without a battery. In this configuration, connect the BATT pin to GND. The device continues to regulate OUT from VCC, monitor reset thresholds, assert RESET on brownout, and provide PFI/PFO functionality - making it suitable for systems where backup is optional or implemented externally.
What are the thermal considerations for the MAX16023PTAT12+T in its 8-pin TDFN package?
The MAX16023PTAT12+T uses an 8-pin TDFN-EP package with θJA = 41°C/W. To maintain safe junction temperature, the exposed pad (EP) must be soldered to a solid PCB ground plane. At 100mA load and 5.5V VCC, power dissipation is ~450mW; with proper thermal land design, this yields ~19°C rise above ambient. Avoid routing high-current traces under the EP and ensure ≥200mm² copper area beneath the package for optimal heat spreading.
MAX16023PTAT12+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:
- 3.08V
- 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 (3x3)
MAX16023PTAT12+T FAQ
1.How can I place an order for MAX16023PTAT12+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16023PTAT12+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 MAX16023PTAT12+T reliable?
The price and inventory of MAX16023PTAT12+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16023PTAT12+T is usually 5 days.
3.What payment methods are accepted for MAX16023PTAT12+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16023PTAT12+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16023PTAT12+T?
MAX16023PTAT12+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16023PTAT12+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 MAX16023PTAT12+T?
For technical support, including MAX16023PTAT12+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16023PTAT12+T requirements.
6.How does Aetrix verify that MAX16023PTAT12+T is sourced from the original manufacturer or authorized distributors?
All MAX16023PTAT12+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 MAX16023PTAT12+T meets industry standards.
7.What is the process for return or replacement of MAX16023PTAT12+T?
All MAX16023PTAT12+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16023PTAT12+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 MAX16023PTAT12+T part is unused and in its original packaging.
Return procedure for MAX16023PTAT12+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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