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Analog Devices Inc./Maxim Integrated MAX16034LLB29+
- Part No.:
- MAX16034LLB29+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16034LLB29+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:620
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Product details
Overview
The MAX16034LLB29+ from Maxim Integrated is a low-power microprocessor supervisory circuit with watchdog timer, power-fail comparator, and battery switchover functionality. It features a factory-set 2.93V reset threshold, 1.6s watchdog timeout, active-low push-pull RESET output, operates from 1.2V to 5.5V, and draws only 13µA quiescent current. It is used in portable equipment and POS terminals to ensure reliable μP reset and SRAM backup during brownouts.
For engineers reviewing the MAX16034LLB29+ datasheet, MAX16034LLB29+ pinout, MAX16034LLB29+ application, or MAX16034LLB29+ equivalent, key selection criteria include its 2.93V reset threshold accuracy, 1.6s watchdog timeout stability over temperature, push-pull RESET drive capability (1.6mA sink), battery switchover hysteresis (40mV), and operation down to 1.2V supply voltage.
Technical Context
The MAX16034LLB29+ integrates a precision reset generator with ±1.5% threshold tolerance over -40°C to +85°C, a monolithic watchdog timer with 1.00–2.25s timeout range (typ. 1.65s), and an independent power-fail comparator referenced to 1.235V with 1% hysteresis. Its internal MOSFET enables seamless VCC-to-BATT switchover when VCC falls below both VTH and VBATT.
It implements a debounced watchdog input (WDI) that resets the timer on any edge transition, asserts RESET for ≥140ms after timeout, and supports system-level fault detection without external components. The device uses a single 10-pin µDFN package with GND-centered thermal pad and operates with full functionality at 1.2V VCC - enabling compatibility with ultra-low-voltage microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.85V (min) to 3.00V (max); factory-trimmed 2.93V typical - ensures precise brownout detection for 3.0V/3.3V systems |
| Watchdog Timeout | 1.00s (min) to 2.25s (max); 1.65s typical - provides robust software execution monitoring with minimal false triggers |
| Quiescent Current | 13µA typical at 2.8V VCC - enables multi-year battery life in always-on backup applications |
| RESET Output Type | Active-low push-pull - delivers 1.6mA sink capability at 0.3V VOL, eliminating need for external pull-up |
| Battery Switchover Hysteresis | 40mV - prevents oscillation during slow VCC ramp-down by requiring 40mV rise before reversion to VCC |
| Operating Voltage Range | 1.2V to 5.5V - supports direct interface with 1.2V I/O domains and legacy 5V logic without level shifting |
| Reset Timeout Period | 140ms (min) to 280ms (max) - guarantees sufficient μP initialization time after power recovery |
Pinout & Package
MAX16034LLB29+ is housed in a 2mm × 2mm, 10-pin µDFN package with exposed thermal pad (pin 10 = GND). The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low reset output | Push-pull driver asserts low during VCC < 2.93V, WDI timeout, or power-fail; holds low ≥140ms after recovery |
| 2 - CEIN | Chip-enable input | Unused in MAX16034; must be tied to GND or OUT to disable gating function (not applicable to this variant) |
| 3 - PFI | Power-fail input | Monitors external voltage divider; trips PFO low when VPFI < 1.235V - enables early warning of secondary rail failure |
| 4 - GND | Ground reference | Primary return path for all analog and digital functions; connects to thermal pad for optimal thermal performance |
| 5 - WDI | Watchdog input | Edge-sensitive input; any rising/falling transition resets internal 1.65s timer - eliminates need for periodic toggling |
| 6 - PFO | Active-low power-fail output | Push-pull output goes low when PFI < 1.235V or VCC < reset threshold - directly drives NMI or interrupt lines |
| 7 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and sources OUT until switchover threshold is crossed |
| 8 - OUT | Regulated output | Delivers up to 200mA from VCC or BATT; switches to battery when VCC < VTH and VCC < VBATT |
| 9 - BATT | Battery backup input | Accepts 2.3V–5.5V; supplies OUT during brownout; draws only 1µA standby current at 2.8V |
| 10 - CEOUT | Chip-enable output | Unused in MAX16034; remains high-impedance or pulled to OUT - no functional role in this variant |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V reset threshold | ±1.5% accuracy over -40°C to +85°C eliminates external resistor calibration for 3.0V systems |
| 1.6s watchdog timeout with edge-triggered reset | Reduces firmware overhead - no periodic pulse generation required; detects hangs within guaranteed window |
| 13µA supply current at 2.8V | Enables >5-year coin-cell lifetime in battery-backed SRAM applications with 20µA typical load |
| 40mV battery switchover hysteresis | Prevents rapid cycling between VCC/BATT during slow power ramps - critical for stable memory retention |
| 1.2V minimum operating voltage | Supports direct integration with 1.2V-core microcontrollers without auxiliary LDO or level shifters |
| Push-pull RESET and PFO outputs | Eliminates external pull-ups, reduces BOM count, and ensures fast, deterministic assertion timing |
Applications
| Portable/Battery-Powered Equipment | POS Equipment |
|---|---|
Use Scenario: Handheld barcode scanners powered by single-cell Li-ion batteries experiencing voltage sag under motor load. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, battery switchover to backup capacitor, and watchdog supervision of ARM Cortex-M0 firmware. Use Value: Prevents corrupted flash writes during 2.8V–3.2V battery droop; maintains RTC/SRAM via BATT path; detects firmware lockups within 1.65s. | Use Scenario: Compact countertop payment terminals with isolated 3.3V logic rails and nonvolatile SRAM for transaction logs. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 3.3V rail (2.93V threshold) and generates NMI via PFO when 5V DC-DC converter fails. Use Value: Guarantees atomic log commit before power loss; enables graceful shutdown; eliminates need for discrete PFI resistor network. |
| Critical μP/μC Power Monitoring | Industrial Control |
Use Scenario: Programmable logic controller (PLC) CPU module requiring fail-safe boot sequence after AC line interruption. IC Role / Device Role / Timing Role: Primary reset generator with 140ms timeout, interfaced to μP's nRESET pin; WDI driven by GPIO toggle in main loop. Use Value: Ensures deterministic restart after 100ms AC dropout; watchdog catches infinite loops in ladder logic interpreter; 13µA draw minimizes standby loss. | Use Scenario: Remote I/O sensor node powered by 3.6V lithium-thionyl chloride battery with 15-year lifespan requirement. IC Role / Device Role / Timing Role: Low-power supervisor managing SRAM retention, detecting supply faults, and signaling via PFO to MCU interrupt line. Use Value: 1µA battery-backup current extends battery life beyond specification; 2.93V threshold matches battery end-of-life voltage; push-pull outputs reduce leakage paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16034PLB29+ | Same core functionality but open-drain RESET and PFO outputs - requires external pull-ups | Suitable where wired-OR reset bus or level translation is needed; not drop-in for push-pull designs | Select only if system architecture mandates open-drain topology or shared reset bus |
| TPS3808G33DBVR | Fixed 3.3V reset threshold (±0.5%), 300ms timeout, 2.9µA IQ, no watchdog or battery switchover | Limited to basic reset-only applications; lacks WDI, BATT, PFI/PFO - cannot replace full MAX16034 functionality | Use only for cost-sensitive, non-battery-backed 3.3V systems requiring minimal supervision |
Compared with MAX16034PLB29+, the MAX16034LLB29+ eliminates external pull-ups and simplifies layout; compared with TPS3808G33DBVR, it adds watchdog, battery switchover, and dual-rail monitoring - making it uniquely suited for portable SRAM backup systems.
Availability
MAX16034LLB29+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, POS terminals, and industrial control systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX16034LLB29+ 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 connectivity in demanding environments.
The MAX16033–MAX16040 product line targets ultra-low-power microprocessor supervision in space-constrained applications, emphasizing integrated battery switchover, watchdog reliability, and sub-1.5V operation for next-generation portable electronics.
FAQ
What is the exact reset threshold voltage of the MAX16034LLB29+?
The MAX16034LLB29+ has a factory-set reset threshold of 2.93V (typical), with a guaranteed range of 2.85V to 3.00V over -40°C to +85°C. This value is laser-trimmed during production and does not require external resistor networks. The threshold remains stable across temperature and supply voltage variations, ensuring consistent brownout detection for 3.0V systems.
Does the MAX16034LLB29+ support battery backup for SRAM, and how does switchover work?
Yes, the MAX16034LLB29+ supports battery backup for SRAM via its dedicated BATT and OUT pins. When VCC falls below both the 2.93V reset threshold and VBATT, the internal MOSFET automatically connects BATT to OUT. Switchover includes 40mV hysteresis to prevent oscillation during slow VCC ramps. In backup mode, the device draws only 1µA from the battery (at 2.8V), preserving capacity for extended hold-up time.
What is the watchdog timeout behavior of the MAX16034LLB29+, and how is it reset?
The MAX16034LLB29+ watchdog has a nominal timeout of 1.65s (range 1.00s–2.25s). It is reset on any rising or falling edge at the WDI pin - no periodic pulse generation is required. If WDI remains static longer than the timeout, RESET pulses low for ≥140ms. The timer also clears automatically whenever RESET is asserted, enabling robust detection of firmware hangs without software intervention.
Can the MAX16034LLB29+ monitor a secondary power supply using the PFI input?
Yes, the MAX16034LLB29+ can monitor a secondary supply via the PFI input using an external resistive divider. The internal 1.235V reference sets the trip point: VTRIP = 1.235V × (R1/R2 + 1). When VPFI falls below 1.235V, PFO asserts low - usable as an NMI or interrupt signal. PFO is push-pull, so no pull-up is needed. Hysteresis can be added externally for noise immunity.
What package type and pin count does the MAX16034LLB29+ use, and is it RoHS-compliant?
The MAX16034LLB29+ uses a 2mm × 2mm, 10-pin µDFN package with exposed thermal pad (pin 10 = GND). It is fully RoHS-compliant and lead-free, denoted by the '+' suffix in the part number. The package supports standard reflow profiles and is qualified for industrial temperature range (-40°C to +85°C).
MAX16034LLB29+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-µDFN (2x2)
MAX16034LLB29+ FAQ
1.How can I place an order for MAX16034LLB29+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16034LLB29+ 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 MAX16034LLB29+ reliable?
The price and inventory of MAX16034LLB29+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16034LLB29+ is usually 5 days.
3.What payment methods are accepted for MAX16034LLB29+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16034LLB29+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16034LLB29+?
MAX16034LLB29+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16034LLB29+ 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 MAX16034LLB29+?
For technical support, including MAX16034LLB29+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16034LLB29+ requirements.
6.How does Aetrix verify that MAX16034LLB29+ is sourced from the original manufacturer or authorized distributors?
All MAX16034LLB29+ 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 MAX16034LLB29+ meets industry standards.
7.What is the process for return or replacement of MAX16034LLB29+?
All MAX16034LLB29+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16034LLB29+, 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 MAX16034LLB29+ part is unused and in its original packaging.
Return procedure for MAX16034LLB29+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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