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Analog Devices Inc./Maxim Integrated MAX16023PTAT18+T
- Part No.:
- MAX16023PTAT18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16023PTAT18+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,263
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Product details
Overview
MAX16023PTAT18+T from Maxim Integrated is a low-power battery-backup circuit with integrated 1.8V fixed-output LDO, 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 output, and operates from 1.53V to 5.5V input. It is designed for SRAM/RTC backup power in brownout conditions where main supply fails.
For engineers reviewing the MAX16023PTAT18+T datasheet, MAX16023PTAT18+T pinout, MAX16023PTAT18+T application, or MAX16023PTAT18+T equivalent, key selection criteria include its 1.8V regulated output accuracy (±2.5%), 145ms reset timeout, 4µA typical supply current, and 8-pin TDFN package with exposed pad - all critical for space-constrained, low-quiescent-power memory retention designs.
Technical Context
The MAX16023PTAT18+T integrates a low-dropout linear regulator, precision reset supervisor with 3.08V threshold (±3.3% over temperature), and battery switchover control that activates only when VCC < VTH, VCC < VBATT, and LDO is in dropout. Its reset logic includes debounced manual-reset input (MR) and 20µs VCC-falling delay.
It provides system-level monitoring via dedicated PFI/PFO comparator inputs/outputs (0.59V threshold, 30mV hysteresis), supports battery freshness seal activation, and uses internal 30kΩ MR pullup. All functions are fully specified across –40°C to +85°C with UL® certification per IEC 60950-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | 1.8V ±2.5% (1.704V–1.900V) - ensures stable bias for 1.8V SRAM/RTC during backup mode |
| Reset Threshold Voltage | 3.08V (min 2.991V, max 3.239V) - triggers reset before main supply drops below critical logic level |
| Supply Current (VCC) | 4µA typical at +25°C - enables multi-year battery life in always-on backup applications |
| Output Current Capability | 100mA continuous - sufficient to power 256KB–1MB SRAM or RTC with oscillator |
| Dropout Voltage | 200mV at 50mA load (1.8V output) - allows operation down to ~2.0V VCC before switchover |
| Reset Timeout Period | 145ms minimum - meets JEDEC JESD8-12B requirement for reliable µP initialization |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded systems |
Pinout & Package
MAX16023PTAT18+T is housed in an 8-pin 3mm × 3mm TDFN-EP package with exposed thermal pad connected internally to GND. The package supports high thermal efficiency and compact PCB layout for portable and space-constrained applications.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input (1.53V–5.5V); bypassed with 0.1µF capacitor to GND for noise immunity |
| 2 | BATT | Backup battery input; powers LDO during brownout when VCC < VTH and VCC < VBATT |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (30kΩ); no external debounce required |
| 4 | PFI | Power-fail comparator input; monitors external voltage via resistive divider (threshold = 0.59V) |
| 5 | PFO | Active-low power-fail output; asserts when PFI falls below 0.59V, used for early warning or interrupt |
| 6 | GND | Analog/digital ground reference; connects to exposed pad for thermal and electrical integrity |
| 7 | RESET | Active-low push-pull reset output; asserts on VCC drop or MR low; 145ms timeout after recovery |
| 8 | OUT | 1.8V regulated LDO output; requires 10µF low-ESR capacitor to GND for stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Battery freshness seal | Disconnects BATT from OUT until first VCC power-up, preserving shelf life of backup battery |
| Debounced manual reset | MR input immune to <100ns glitches; eliminates need for external RC filtering or firmware debounce |
| Low-dropout regulation | 200mV dropout at 50mA enables operation with weak or aging batteries (e.g., coin cells) |
| UL® certified safety | Complies with IEC 60950-1 - simplifies end-equipment safety certification for industrial/medical use |
| Power-fail comparator | Independent 0.59V threshold with 30mV hysteresis - monitors auxiliary rails without loading main supply |
Applications
| SRAM Backup Power | Real-Time Clock (RTC) Supply |
|---|---|
|
Use Scenario: Maintaining volatile static RAM contents during AC power loss or battery replacement in point-of-sale terminals. IC Role / Device Role / Timing Role: Provides uninterrupted 1.8V regulated power and asserts hardware reset to halt CPU writes during switchover. Use Value: Prevents data corruption in 1.8V SRAM by guaranteeing >100mA delivery and seamless VCC-to-BATT transition within 1µs. |
Use Scenario: Powering I²C or SPI RTC ICs (e.g., DS3231, PCF8563) in GPS trackers during vehicle ignition-off periods. IC Role / Device Role / Timing Role: Supplies clean 1.8V bias and monitors main rail for brownout detection to trigger timekeeping preservation routines. Use Value: Enables >5-year coin-cell lifetime via 4µA quiescent current and battery freshness seal, while maintaining ±2ppm RTC accuracy. |
| Industrial Control HMI | Set-Top Box Configuration Memory |
|
Use Scenario: Preserving display calibration data and user preferences in factory-floor HMIs exposed to 24VDC brownouts. IC Role / Device Role / Timing Role: Acts as dual-function supervisor: resets microcontroller on undervoltage and backs up FRAM/SRAM via 1.8V LDO. Use Value: Eliminates need for separate reset IC and LDO, reducing BOM count and PCB area by 35% versus discrete solutions. |
Use Scenario: Retaining channel lineup, parental controls, and network credentials in consumer STBs during brief grid interruptions. IC Role / Device Role / Timing Role: Delivers regulated 1.8V to EEPROM/FRAM and asserts RESET to freeze firmware state during power collapse. Use Value: Guarantees zero configuration loss with 145ms reset hold time and 1.8V output accuracy tighter than ±2.5% over full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-backup supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16024PTBT18+T | 10-pin TDFN; adds CEIN/CEOUT gating and BATT ON indicator; same 1.8V output and 3.08V reset threshold | Required when chip-enable signal locking during reset is needed to prevent SRAM write corruption | Select MAX16024PTBT18+T if CE gating or battery-status indication is mandatory; otherwise MAX16023PTAT18+T offers smaller footprint and lower cost |
| TPS3808G33DBVR | Standalone 3.3V supervisor (no LDO); 3.08V reset threshold; 1.6µA IQ; SOT-23-6 package | Lacks integrated LDO and battery switchover - requires external 1.8V regulator and diode-OR circuit | Choose TPS3808G33DBVR only if system already has dedicated 1.8V LDO and needs minimal-footprint reset supervision only |
Compared with MAX16024PTBT18+T, MAX16023PTAT18+T saves board space and cost by omitting CE gating, while matching core backup functionality. Versus TPS3808G33DBVR, it eliminates two external components (LDO + OR-ing diode) and reduces total solution size by 40%, despite higher pin count than the SOT-23.
Availability
MAX16023PTAT18+T is available at Aetrix Electronics and suitable for SRAM backup, RTC power, industrial HMI, and set-top box configuration memory applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX16023PTAT18+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 markets.
The MAX16023/MAX16024 family was designed specifically for low-power, space-constrained memory backup systems requiring integrated regulation, reset supervision, and battery switchover - eliminating discrete solutions in portable and embedded equipment.
FAQ
What is the exact regulated output voltage of MAX16023PTAT18+T and how tightly is it specified?
The MAX16023PTAT18+T delivers a factory-trimmed 1.8V output with guaranteed accuracy of ±2.5% (1.704V to 1.900V) over –40°C to +85°C and 1mA–100mA load. This specification ensures compatibility with 1.8V SRAM and RTC ICs without requiring external trimming or feedback networks. The MAX16023PTAT18+T achieves this via laser-trimmed internal bandgap and error amplifier compensation.
Does MAX16023PTAT18+T support automatic switchover to battery power, and what conditions trigger it?
Yes, MAX16023PTAT18+T automatically switches the OUT regulator from VCC to BATT when three conditions are simultaneously met: VCC falls below the 3.08V reset threshold, VCC is lower than VBATT, and the LDO enters dropout. This prevents brownout-induced data loss in SRAM/RTC. The MAX16023PTAT18+T implements this logic in hardware with no firmware dependency.
What is the function of the PFI and PFO pins on MAX16023PTAT18+T, and can they monitor voltages other than VCC?
PFI is a dedicated input for an external resistive divider; PFO is its active-low comparator output referenced to a precise 0.59V internal threshold. They enable monitoring of any DC rail - including negative supplies - by configuring the divider appropriately. The MAX16023PTAT18+T's PFI/PFO pair operates independently of the main reset circuit and draws only ±1µA input current.
How does the battery freshness seal work in MAX16023PTAT18+T, and how is it activated?
The MAX16023PTAT18+T battery freshness seal isolates BATT from OUT until VCC is applied for the first time, preventing premature discharge of backup batteries during storage. It latches on power-up and remains engaged until re-enabled via a specific sequence: drive MR > VBATT + 1.2V for ≥3µs while pulling OUT to 0. This feature is intrinsic to the MAX16023PTAT18+T silicon design.
What are the thermal and packaging specifications for MAX16023PTAT18+T, and how should the exposed pad be handled?
MAX16023PTAT18+T uses an 8-pin 3mm × 3mm TDFN-EP package with θJA = 41°C/W. The exposed pad (EP) is internally connected to GND and must be soldered to a large PCB ground plane for optimal thermal dissipation and EMI performance. It is not intended as the sole ground connection - standard pin 6 (GND) must also be routed.
MAX16023PTAT18+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)
MAX16023PTAT18+T FAQ
1.How can I place an order for MAX16023PTAT18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16023PTAT18+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 MAX16023PTAT18+T reliable?
The price and inventory of MAX16023PTAT18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16023PTAT18+T is usually 5 days.
3.What payment methods are accepted for MAX16023PTAT18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16023PTAT18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16023PTAT18+T?
MAX16023PTAT18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16023PTAT18+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 MAX16023PTAT18+T?
For technical support, including MAX16023PTAT18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16023PTAT18+T requirements.
6.How does Aetrix verify that MAX16023PTAT18+T is sourced from the original manufacturer or authorized distributors?
All MAX16023PTAT18+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 MAX16023PTAT18+T meets industry standards.
7.What is the process for return or replacement of MAX16023PTAT18+T?
All MAX16023PTAT18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16023PTAT18+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 MAX16023PTAT18+T part is unused and in its original packaging.
Return procedure for MAX16023PTAT18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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