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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX16035LLB29+T

Name: MAX16035LLB29+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX16035LLB29+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX16035LLB29+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: 10-WFDFN

Datasheet:: MAX16035LLB29+T.pdf

Description:: IC SUPERVISOR 1 CHANNEL 10UDFN

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Product details

Overview

The MAX16035LLB29+T from Maxim Integrated is a low-power, 10-pin μDFN supervisory circuit designed for battery-backed SRAM power management in microprocessor systems. It provides active-low push-pull reset (V_TH = 2.93 V), battery-on indicator (BATTON), power-fail warning (PFI/PFO), and operates from 1.2 V to 5.5 V with 13 µA quiescent current. It is used in portable POS terminals where reliable brownout detection and seamless battery switchover are critical.

For engineers reviewing the MAX16035LLB29+T datasheet, MAX16035LLB29+T pinout, MAX16035LLB29+T application, or MAX16035LLB29+T equivalent, key selection criteria include its 2.93 V factory-set reset threshold, BATTON output functionality, -40°C to +85°C temperature range, 10-pin μDFN package, and compatibility with 2.5 V/3.0 V/3.3 V/5.0 V supply monitoring.

Technical Context

The MAX16035LLB29+T implements a precision voltage-monitoring architecture with a dedicated 1.235 V internal reference for PFI and RESETIN comparators, enabling accurate secondary supply monitoring. Its integrated MOSFET-based switchover logic connects OUT to BATT when V_CC falls below 2.93 V and VBATT exceeds V_CC by ≥40 mV - ensuring glitch-free backup transitions without external components.

It features a debounced manual-reset input (not present in MAX16035), watchdog timer (not present), and chip-enable gating (not present), confirming its role as the BATTON-enabled variant within the MAX16033–MAX16040 family. All devices share identical 140 ms minimum reset timeout, 1.2 V valid reset assertion, and power-supply transient immunity up to 10 V/ms.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold Voltage	2.85 V (min) to 3.00 V (max); factory-trimmed to 2.93 V typical - ensures reliable reset assertion during 3.0 V or 3.3 V rail brownouts.
Supply Voltage Range	1.2 V to 5.5 V - supports operation directly from low-voltage backup sources and main supplies including 2.5 V, 3.0 V, 3.3 V, and 5.0 V rails.
Quiescent Supply Current	13 µA typical at V_CC = 2.8 V - enables multi-year battery life in always-on backup applications.
Battery-Backup Current	1 µA at T_A = +25°C, 2 µA over full -40°C to +85°C range - minimizes drain on coin-cell or supercapacitor backup sources.
Reset Timeout Period	140 ms (min), 280 ms (max) - guarantees sufficient processor initialization time after power recovery.
Operating Temperature	-40°C to +85°C - qualified for industrial and extended commercial environments including point-of-sale and embedded controllers.
Package	10-pin μDFN (2 mm × 2 mm, 0.5 mm pitch) - enables high-density PCB layouts in space-constrained portable equipment.

Pinout & Package

MAX16035LLB29+T is housed in a 10-pin, 2 mm × 2 mm, 0.5 mm pitch μDFN package with exposed pad (EP). The package is RoHS-compliant and lead(Pb)-free (+T denotes tape-and-reel).

Pin	Circuit Role	Design Meaning
1	RESET	Active-low push-pull reset output; asserts low when V_CC < 2.93 V, remains low for ≥140 ms after recovery - directly drives µP reset input without pull-up.
2	CEIN	Chip-enable input - unused in MAX16035; must be tied to GND or OUT per datasheet guidance to avoid floating node.
3	PFI	Power-fail input; comparator threshold = 1.235 V - monitors auxiliary supplies via resistive divider to generate early PFO warning.
4	GND	Analog/digital ground reference - shared return path for all internal circuits and external bypass capacitors.
5	MR	Manual-reset input - not functional in MAX16035; internally unconnected; leave floating or tie to V_CC.
6	PFO	Active-low push-pull power-fail output - goes low when PFI < 1.235 V or V_CC < 2.93 V - signals µP NMI or interrupt controller.
7	V_CC	Main supply input - powers internal circuitry; accepts 1.2 V to 5.5 V; source for OUT during normal operation.
8	OUT	Switched output - sourced from V_CC when valid, automatically switches to BATT during backup - powers SRAM or real-time clock.
9	BATT	Backup-battery input - supplies OUT when V_CC drops below threshold; requires ≥40 mV headroom over V_CC for switchover.
10	CEOUT	Chip-enable output - unused in MAX16035; internally unconnected; leave floating or tie to OUT if needed for signal integrity.

Key Features

Feature	Design Value
Battery-On Output (BATTON)	Push-pull high-state indicator during backup mode - provides direct visual or logic-level status without external transistor or pull-up.
Independent Power-Fail Comparator	Dedicated 1.235 V reference with 1% hysteresis - enables precise monitoring of secondary supplies (e.g., 5 V, 12 V rails) via external resistor dividers.
Low 13 µA Quiescent Current	Enables >10-year coin-cell lifetime in always-on backup applications - critical for RTC and SRAM retention in battery-powered devices.
Active-Low Push-Pull RESET	No external pull-up required - reduces BOM count and eliminates weak-drive timing uncertainty in µP reset assertion.
2 mm × 2 mm μDFN Package	Reduces board area by >60% vs. SOIC-8 - supports ultra-compact designs in handheld and portable instrumentation.

Applications

Portable POS Terminals	Industrial Controllers
Use Scenario: Battery-backed memory retention during AC power loss or hot-swap battery replacement in retail payment terminals. IC Role / Device Role / Timing Role: Supervisory IC providing automatic V_CC/BATT switchover, BATTON status flag, and 2.93 V brownout detection for SRAM power path. Use Value: Prevents data corruption during power transitions; BATTON enables firmware to log backup events and initiate safe shutdown sequences.	Use Scenario: Maintaining real-time clock and configuration memory during brownouts in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Reset generator and backup supervisor ensuring deterministic µC reset behavior and uninterrupted RTC operation. Use Value: Guarantees 140 ms minimum reset pulse width and 1.2 V valid reset assertion - meets IEC 61000-4-11 immunity requirements for industrial environments.
Set-Top Boxes	Intelligent Instrumentation
Use Scenario: Preserving channel lineup and user preferences across unexpected power interruptions in digital cable receivers. IC Role / Device Role / Timing Role: Dual-role device: reset supervisor for SoC boot integrity and battery switchover controller for nonvolatile memory backup. Use Value: Eliminates need for discrete diode-OR and reset IC - reduces component count while improving switchover speed and reliability.	Use Scenario: Securing calibration data and measurement history in portable multimeters and data loggers during field use. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >5-year CR2032 battery life while providing tamper-proof memory retention. Use Value: 1 µA battery-backup current and 2.93 V threshold match common 3 V lithium primary cell discharge profile - maximizes usable battery capacity.

Portable POS Terminals

Industrial Controllers

Use Scenario: Battery-backed memory retention during AC power loss or hot-swap battery replacement in retail payment terminals.

IC Role / Device Role / Timing Role: Supervisory IC providing automatic V_CC/BATT switchover, BATTON status flag, and 2.93 V brownout detection for SRAM power path.

Use Value: Prevents data corruption during power transitions; BATTON enables firmware to log backup events and initiate safe shutdown sequences.

Use Scenario: Maintaining real-time clock and configuration memory during brownouts in programmable logic controllers (PLCs).

IC Role / Device Role / Timing Role: Reset generator and backup supervisor ensuring deterministic µC reset behavior and uninterrupted RTC operation.

Use Value: Guarantees 140 ms minimum reset pulse width and 1.2 V valid reset assertion - meets IEC 61000-4-11 immunity requirements for industrial environments.

Set-Top Boxes

Intelligent Instrumentation

Use Scenario: Preserving channel lineup and user preferences across unexpected power interruptions in digital cable receivers.

IC Role / Device Role / Timing Role: Dual-role device: reset supervisor for SoC boot integrity and battery switchover controller for nonvolatile memory backup.

Use Value: Eliminates need for discrete diode-OR and reset IC - reduces component count while improving switchover speed and reliability.

Use Scenario: Securing calibration data and measurement history in portable multimeters and data loggers during field use.

IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >5-year CR2032 battery life while providing tamper-proof memory retention.

Use Value: 1 µA battery-backup current and 2.93 V threshold match common 3 V lithium primary cell discharge profile - maximizes usable battery capacity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar supervisory circuit applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX16035PLB29+T	Same reset threshold (2.93 V) and BATTON function, but features open-drain RESET and PFO outputs instead of push-pull.	Requires external pull-up resistors on RESET and PFO lines; suitable where wired-OR logic or level translation is needed.	Select when system design mandates open-drain outputs for bus sharing or mixed-voltage interfacing.
MAX16039LLB29+T	Identical pinout and BATTON functionality, but includes RESETIN input (1.235 V threshold) for monitoring secondary supplies - MAX16035 lacks RESETIN.	Enables dual-rail monitoring (e.g., 3.3 V main + 5 V auxiliary) without adding external comparators.	Choose when auxiliary supply supervision is required alongside battery switchover and BATTON indication.

Compared with MAX16035LLB29+T, the PLB29 variant trades push-pull drive for wiring flexibility, while MAX16039LLB29+T adds RESETIN capability at the cost of increased design complexity - MAX16035 remains optimal for pure battery-status + fixed-threshold reset applications.

Availability

MAX16035LLB29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial controllers, set-top boxes, and intelligent instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for MAX16035LLB29+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, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.

The MAX16033–MAX16040 family was engineered specifically for low-power, space-constrained battery-backed memory systems - delivering integrated reset, switchover, and status signaling in sub-4 mm² packages.

FAQ

What is the factory-set reset threshold voltage of the MAX16035LLB29+T?

The MAX16035LLB29+T has a factory-set reset threshold voltage of 2.93 V (typical), with a guaranteed range of 2.85 V (min) to 3.00 V (max). This value is laser-trimmed during production and applies to V_CC falling conditions. The threshold remains stable over temperature (-40°C to +85°C) with ±0.3% variation, making it suitable for precise 3.0 V supply monitoring in battery-backed systems.

Does the MAX16035LLB29+T support manual reset functionality?

No, the MAX16035LLB29+T does not include manual reset (MR) functionality. MR is only present in MAX16033 and MAX16037 variants. In MAX16035LLB29+T, Pin 5 (MR) is unconnected internally - it must be left floating or tied to V_CC per the datasheet. This distinguishes MAX16035 as the BATTON-focused variant optimized for automated switchover rather than user-initiated reset.

How does the BATTON output behave during battery backup mode?

The BATTON output of the MAX16035LLB29+T asserts high (push-pull) when the device enters battery backup mode - i.e., when V_CC falls below 2.93 V and VBATT exceeds V_CC by ≥40 mV. It sinks 3.2 mA at 0.4 V saturation and sources ~10 µA from OUT in backup mode. This provides a direct logic-high flag for firmware polling or LED indication without external components.

Can the MAX16035LLB29+T monitor a secondary power supply?

No, the MAX16035LLB29+T does not include the RESETIN input required for secondary supply monitoring. That feature is exclusive to MAX16036 and MAX16040 variants. MAX16035LLB29+T retains the PFI input for power-fail warning on an auxiliary rail, but lacks the dedicated 1.235 V comparator input needed for user-adjustable reset thresholds on secondary voltages.

What is the maximum continuous output current capability of the MAX16035LLB29+T's OUT pin?

The OUT pin of the MAX16035LLB29+T delivers up to 200 mA when sourced from V_CC under normal operation. In battery backup mode, current is limited by the internal MOSFET's on-resistance (4.6 Ω typical at V_BATT = 2.5 V, I_OUT = 5 mA) and thermal constraints. The device is short-circuit protected for up to 5 seconds, and continuous output current in backup mode depends on VBATT voltage and ambient temperature.

MAX16035LLB29+T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 10-WFDFN

Packaging:: Tape & Reel (TR)

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)

MAX16035LLB29+T FAQ

1.How can I place an order for MAX16035LLB29+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX16035LLB29+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 MAX16035LLB29+T reliable?

The price and inventory of MAX16035LLB29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16035LLB29+T is usually 5 days.

3.What payment methods are accepted for MAX16035LLB29+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16035LLB29+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX16035LLB29+T?

MAX16035LLB29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX16035LLB29+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 MAX16035LLB29+T?

For technical support, including MAX16035LLB29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16035LLB29+T requirements.

6.How does Aetrix verify that MAX16035LLB29+T is sourced from the original manufacturer or authorized distributors?

All MAX16035LLB29+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 MAX16035LLB29+T meets industry standards.

7.What is the process for return or replacement of MAX16035LLB29+T?

All MAX16035LLB29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16035LLB29+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 MAX16035LLB29+T part is unused and in its original packaging.

Return procedure for MAX16035LLB29+T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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