Analog Devices Inc./Maxim Integrated MAX16165ATPH+T

Overview

MAX16165ATPH+T from Analog Devices is a highly integrated 4-channel power-supply sequencer and supervisor IC designed for precise, capacitor-adjustable voltage ramp control and fault-monitored startup/shutdown in multi-rail systems. It operates from 2.7V to 16V, monitors up to five voltages (including VDD via UVSET), sequences four outputs with programmable delays, features open-drain outputs, and supports daisy-chaining for scalable system-level sequencing - deployed in FPGA/ASIC power management and industrial sensor subsystems.

For engineers reviewing the MAX16165ATPH+T datasheet, MAX16165ATPH+T pinout, MAX16165ATPH+T application, or MAX16165ATPH+T equivalent, this page delivers verified electrical parameters, real-world sequencing timing behavior, package-specific layout guidance, functional differences vs. push-pull variant MAX16166, and validated alternatives for multi-supply rail coordination in servers, security cameras, and embedded controllers.

Technical Context

The MAX16165ATPH+T implements a state-machine-driven sequencing engine with edge-triggered ON/OFF inputs (500mV threshold), capacitor-programmable inter-channel delay (tDLY) and power-good timeout (tPGT), and resistor-configurable offset current injection (IOFFSET = 0.5μA–50μA) during power-off reverse sequencing. Its internal 2.45–3.20V ABP regulator powers logic and supplies >1mA to external circuitry.

It uses five 0.5V threshold comparators (UVSET, SET1–SET4) with 1% hysteresis and 20ppm/°C tempco for voltage monitoring, and integrates bidirectional FAULT I/O that asserts low on undervoltage, timeout, or external pull-down - triggering immediate output disable and initialization reset. All outputs are open-drain, requiring external pull-ups.

Key Specifications

Pinout & Package

MAX16165ATPH+T is packaged in a 1.63mm × 2.03mm, 20-bump Wafer-Level Package (WLP) with bottom-side bump array. The package requires standard reflow per JEDEC J-STD-020 (260°C peak) and thermal pad connection to PCB ground plane for reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply sequencing applications.

Compared with MAX16166ATPH+T, MAX16165ATPH+T offers superior fault signaling interoperability via open-drain outputs and FAULT line sharing, while TPS6508641RSLR trades configurability for tighter integration - making MAX16165ATPH+T optimal for custom multi-rail systems requiring field-programmable sequencing and robust rail supervision.

Availability

MAX16165ATPH+T is available at Aetrix Electronics and suitable for FPGA/ASIC power sequencing, server power management, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX16165ATPH+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.

The MAX16165ATPH+T belongs to Analog Devices' power-supply supervisory IC portfolio, engineered specifically for deterministic, fault-resilient sequencing of multiple voltage rails in complex embedded systems - emphasizing configurability, thermal robustness, and system-level interoperability.

FAQ

What is the function of the IOS pin on the MAX16165ATPH+T?

The IOS pin on the MAX16165ATPH+T sets the offset current (IOFFSET) injected into SET_ pins during power-off sequencing. By connecting a resistor (10kΩ–1MΩ) from IOS to GND, designers configure IOFFSET between 0.5μA and 50μA - ensuring controlled discharge of sequenced rails and preventing false re-enabling due to slow voltage decay. This function is critical for reliable reverse-order shutdown in multi-supply systems.

How does the MAX16165ATPH+T handle undervoltage faults on the UVSET input?

When an undervoltage condition is detected on the UVSET input, the MAX16165ATPH+T asserts the FAULT pin low and holds it low as long as the UVSET voltage remains below 0.5V. Unlike other fault types (e.g., SET_ timeout), this is not a one-shot pulse - it sustains the fault state until UVSET recovers, simultaneously disabling all outputs and resetting the sequencing state machine to initialization. This behavior ensures fail-safe response to primary supply failure.

Can the MAX16165ATPH+T be used without external pull-up resistors on its outputs?

No - the MAX16165ATPH+T features open-drain outputs (OUT1–OUT4, DONE, POK, FAULT), which require external pull-up resistors to define the high-state voltage level and provide current sourcing capability. Without pull-ups, these outputs cannot drive logic-high signals or interface with standard CMOS inputs. Typical values range from 4.7kΩ to 10kΩ, selected based on rise-time and bus loading requirements.

What is the role of the DLY and PGT pins in the MAX16165ATPH+T sequencing operation?

The DLY pin sets the inter-channel delay time (tDLY) using an external capacitor to GND - determining the wait period between enabling successive outputs during power-on or disabling them during reverse power-off. The PGT pin sets the power-good timeout (tPGT), defining the maximum time allowed for a monitored rail (via SET_) to rise above 0.5V after its corresponding output is enabled. Both are essential for tuning sequencing timing to match actual DC-DC converter slew rates.

Is the MAX16165ATPH+T pin-compatible with the MAX16166ATPH+T?

Yes - the MAX16165ATPH+T and MAX16166ATPH+T share identical pinout, package dimensions (20-bump WLP), and functional logic; the sole difference is output driver type: MAX16165ATPH+T uses open-drain outputs requiring external pull-ups, while MAX16166ATPH+T uses push-pull outputs capable of sourcing 1mA. This allows direct PCB substitution when drive strength and fault-signaling architecture permit.