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Analog Devices Inc./Maxim Integrated MAX16023PTAL33+
- Part No.:
- MAX16023PTAL33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16023PTAL33+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:999
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Product details
Overview
MAX16023PTAL33+ from Maxim Integrated is a low-power battery-backup circuit with integrated 3.3V LDO, µP reset supervisor, and automatic VCC-to-battery switchover. It delivers up to 100mA output current, features push-pull reset output (L suffix), 4.63V reset threshold, and operates from 1.53V to 5.5V input. It is used to back up SRAM and RTCs during main power brownout.
For engineers reviewing the MAX16023PTAL33+ datasheet, MAX16023PTAL33+ pinout, MAX16023PTAL33+ application, or MAX16023PTAL33+ equivalent, key selection criteria include regulated 3.3V output accuracy (±2.7%), 145ms minimum reset timeout, 4µA typical supply current, battery-on indicator absence (MAX16023 variant), and open-drain PFO/power-fail comparator functionality.
Technical Context
The MAX16023PTAL33+ integrates a 100mA low-dropout regulator with 150mV dropout at 50mA load, a precision reset supervisor with 4.63V threshold (±3.5% over temperature), and a dedicated power-fail comparator (PFI/PFO) referenced to 0.59V internal threshold with 30mV hysteresis. Its battery switchover logic activates only when VCC falls below reset threshold, VCC < VBATT, and LDO enters dropout - excluding 1.2V versions.
It implements debounced manual reset (MR) with 30kΩ internal pullup, 120ns MR-to-reset delay, and supports external reset assertion via TTL/CMOS-compatible input. The device uses an exposed-pad 8-pin TDFN package thermally optimized for industrial temperature range (-40°C to +85°C) and certified to IEC 60950-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | 3.3V ±2.7% (1.2V–3.3V factory-trimmed options available; MAX16023 fixed only) |
| Reset Threshold | 4.63V (typ), ±3.5% over -40°C to +85°C - triggers reset on VCC fall below this level |
| Supply Current (VCC mode) | 4µA (typ) at VCC = LDO + 0.5V, enabling ultra-low-power backup operation |
| Battery Backup Current | 3.5µA to 5.26µA (typ) at VBATT = 3V, VCC = 0 - minimizes battery drain during outage |
| Reset Timeout Period | 145ms (min), 215ms (typ), 285ms (max) - ensures reliable µP initialization after power recovery |
| Dropout Voltage | 150mV (max) at 50mA load - sustains regulation down to VCC = 3.45V for 3.3V output |
| Power-Fail Comparator Threshold | 0.590V (typ), 30mV hysteresis - enables early warning of auxiliary supply failure down to 0.6V |
Pinout & Package
MAX16023PTAL33+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed pad internally connected to GND. Thermal performance is optimized via soldered exposed pad to PCB ground plane.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input (1.53V–5.5V); bypass to GND with 0.1µF capacitor |
| 2 | BATT | Backup battery input; powers LDO during VCC brownout when VCC < VBATT and in dropout |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (30kΩ); 120ns delay to RESET assertion |
| 4 | PFI | Power-fail comparator input; referenced to 0.59V internal threshold; accepts resistive divider for monitoring |
| 5 | PFO | Active-low power-fail output; asserts when PFI falls below threshold; open-drain, 1µA leakage max |
| 6 | GND | Analog/digital ground reference; connects to exposed pad (EP) |
| 7 | RESET | Active-low reset output; push-pull configuration (L suffix); VOL ≤ 0.3V at 3.2mA sink |
| 8 | OUT | Regulated 3.3V LDO output; supplies up to 100mA; bypass to GND with 10µF low-ESR capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Battery freshness seal | Internally disconnects BATT from OUT until VCC powers up for first time - preserves shelf life of backup battery |
| Debounced manual reset | MR input requires no external RC network; 100ns glitch immunity and 120ns propagation delay ensure clean reset initiation |
| Low-quiescent-current LDO | 4µA typical ICC and 3.5–5.26µA IBATT enable >10-year coin-cell backup life in RTC/SRAM applications |
| Programmable power-fail detection | PFI input accepts external resistor divider to monitor any voltage ≥0.6V - supports early shutdown signaling for auxiliary rails |
| Industrial temperature grade | Specified from -40°C to +85°C with guaranteed reset timeout, dropout, and output accuracy across full range |
Applications
| Real-Time Clock (RTC) Backup | Static RAM (SRAM) Retention |
|---|---|
|
Use Scenario: Maintaining timekeeping during AC power loss or battery replacement in embedded clocks. IC Role / Device Role / Timing Role: Provides regulated 3.3V standby power and reset supervision to RTC ICs like DS1307 or PCF8563. Use Value: Ensures uninterrupted timekeeping with <5.26µA battery drain and automatic switchover within 20µs of VCC drop. |
Use Scenario: Preserving volatile memory contents during main power interruption in point-of-sale terminals. IC Role / Device Role / Timing Role: Supplies stable 3.3V to CMOS SRAM (e.g., IS61LV256AL) and asserts RESET to halt processor writes. Use Value: Prevents data corruption via 145ms reset hold time and battery-on switchover before VCC drops below 3.3V. |
| GPS Module Power Management | Industrial Control Panel Memory |
|
Use Scenario: Sustaining GPS almanac and ephemeris data during vehicle ignition cycling or battery disconnection. IC Role / Device Role / Timing Role: Acts as dual-function supervisor: powers GPS baseband IC's backup rail and monitors VBAT for early warning. Use Value: Enables fast TTFF (Time-To-First-Fix) recovery using PFO-triggered interrupt to save state before full power loss. |
Use Scenario: Securing configuration registers and runtime logs in programmable logic controllers during factory power dips. IC Role / Device Role / Timing Role: Delivers 100mA 3.3V backup to nonvolatile FRAM or battery-backed SRAM while asserting system-wide RESET. Use Value: Guarantees deterministic restart with 285ms max reset timeout and 30mV hysteresis on PFI to reject noise-induced false trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-backup supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16024PTBL33+ | 10-pin TDFN; adds CEIN/CEOUT gating, BATT ON indicator, and SET pin for adjustable output (not used in fixed 3.3V version) | Required where chip-enable signal blocking during reset is needed to prevent SRAM write errors | Select MAX16024PTBL33+ if CE gating or battery-status indication is required; otherwise MAX16023PTAL33+ offers smaller footprint and lower cost |
| TPS3808G33DBVR | Single-function 3.3V supervisor (no LDO, no battery switchover); 3.08V reset threshold; 1.6µA IQ; SOT-23-5 | Only provides reset supervision - external LDO and battery diode OR-ing required for backup function | Choose TPS3808G33DBVR only when backup power path is implemented separately and board space is extremely constrained |
Compared with MAX16024PTBL33+, MAX16023PTAL33+ saves two pins and eliminates CE gating complexity while retaining identical 3.3V LDO performance and reset behavior; versus TPS3808G33DBVR, it integrates power-path management but occupies more area and costs more per function.
Availability
MAX16023PTAL33+ is available at Aetrix Electronics and suitable for real-time clock backup, SRAM retention, GPS module power management, and industrial control panel memory requiring stable component supply and long-term lifecycle support.
Supply support for MAX16023PTAL33+ 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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and communications systems.
The MAX16023/MAX16024 product line targets compact, low-power backup solutions for memory and timing circuits - integrating LDO, supervisor, and switchover logic to eliminate discrete diodes, regulators, and reset ICs.
FAQ
What is the reset output configuration of MAX16023PTAL33+?
The 'L' in MAX16023PTAL33+ denotes a push-pull RESET output. This configuration actively drives high (VOH ≥ VOUT − 0.3V) and low (VOL ≤ 0.3V at 3.2mA sink), eliminating the need for an external pullup resistor. Unlike open-drain variants, MAX16023PTAL33+ provides defined logic levels without external components, simplifying µP interface design.
Does MAX16023PTAL33+ support battery switchover for all output voltages?
Yes, MAX16023PTAL33+ supports automatic battery switchover for its 3.3V output, but the condition "regulator in dropout" does not apply to the 1.2V version per datasheet. For MAX16023PTAL33+, switchover occurs when VCC falls below 4.63V, VCC < VBATT, and the LDO enters dropout - which at 3.3V output requires VCC ≤ 3.45V (3.3V + 150mV dropout).
Can MAX16023PTAL33+ monitor a 5V supply using the PFI input?
Yes, MAX16023PTAL33+ can monitor a 5V supply via PFI by connecting it through a resistive divider that scales the voltage down to ≤0.611V (max PFI threshold). For example, a 100kΩ/12.1kΩ divider yields ~0.59V at PFI when VIN = 5V, enabling early power-fail detection before main supply collapse affects system operation.
What is the purpose of the battery freshness seal in MAX16023PTAL33+?
The battery freshness seal in MAX16023PTAL33+ prevents the backup battery from discharging through internal circuitry before first power-up. It remains open until VCC is applied, then latches closed. This ensures maximum shelf life - critical for devices shipped with preinstalled coin cells, such as medical or metering equipment using MAX16023PTAL33+.
Is MAX16023PTAL33+ compatible with 1.8V microcontrollers?
MAX16023PTAL33+ is not directly compatible with 1.8V µCs for RESET signaling because its RESET output is referenced to its 3.3V OUT rail (VOH ≥ 3.0V). However, it can supervise 1.8V systems by powering the µC's backup domain and using an external level shifter or by configuring the µC's reset pin for 3.3V-tolerant operation - confirmed in MAX16023PTAL33+'s absolute maximum ratings.
MAX16023PTAL33+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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)
MAX16023PTAL33+ FAQ
1.How can I place an order for MAX16023PTAL33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16023PTAL33+ 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 MAX16023PTAL33+ reliable?
The price and inventory of MAX16023PTAL33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16023PTAL33+ is usually 5 days.
3.What payment methods are accepted for MAX16023PTAL33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16023PTAL33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16023PTAL33+?
MAX16023PTAL33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16023PTAL33+ 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 MAX16023PTAL33+?
For technical support, including MAX16023PTAL33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16023PTAL33+ requirements.
6.How does Aetrix verify that MAX16023PTAL33+ is sourced from the original manufacturer or authorized distributors?
All MAX16023PTAL33+ 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 MAX16023PTAL33+ meets industry standards.
7.What is the process for return or replacement of MAX16023PTAL33+?
All MAX16023PTAL33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16023PTAL33+, 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 MAX16023PTAL33+ part is unused and in its original packaging.
Return procedure for MAX16023PTAL33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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