Analog Devices Inc./Maxim Integrated MAX17227JANT+

Overview

MAX17227JANT+ from Analog Devices is a nanoPower synchronous boost converter IC designed for ultra-low-power battery systems. It delivers up to 500mA peak inductor current, features 350nA quiescent supply current, operates from 400mV–5.5V input, supports 2.3V–5.4V resistor-programmable output, and integrates True Shutdown™ and automatic pass-through mode. It is deployed in wearable medical sensors and low-duty-cycle IoT nodes where micropower efficiency and cold-start capability are critical.

For engineers reviewing the MAX17227JANT+ datasheet, MAX17227JANT+ pinout, MAX17227JANT+ application, or MAX17227JANT+ equivalent, this page provides verified package mapping (6-bump WLP and 8-pin TDFN), confirmed pin functions (RSEL, LX, EN, OUT, IN, GND), validated operating modes (ULPM/LPM/HPM), and real-world design meaning of key specs including 880mV startup voltage, 95% peak efficiency, and active discharge resistance of 225–900Ω.

Technical Context

The MAX17227JANT+ employs an adaptive on-time pulse-frequency-modulation (PFM) control scheme that dynamically transitions between ultra-low-power mode (ULPM), low-power mode (LPM), and high-power mode (HPM) based on load current - enabling 350nA IQ in ULPM and 95% peak efficiency in HPM. Its internal architecture includes cycle-by-cycle inductor current limiting (500mA), True Shutdown™ with zero forward/reverse leakage, and integrated pass-through switch with 400–650mΩ R_DS(on).

It uses a single external resistor on the RSEL pin to select one of 31 output voltages (2.3V–5.4V in 100mV steps), eliminating feedback dividers and reducing light-load current draw. Startup occurs at 880mV input into ≥3kΩ load, and active discharge pulls output capacitance to ground via a 225–900Ω internal resistor upon shutdown.

Key Specifications

Pinout & Package

MAX17227JANT+ is available in two RoHS-compliant packages: (1) 1.58mm × 0.89mm, 6-bump WLP (3×2 array, 0.4mm pitch, N60O1+1); and (2) 2mm × 2mm, 8-pin TDFN (T822+3C) with exposed pad. Both packages support −40°C to +125°C operation and feature identical pin functions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nanoPower boost converter applications.

Compared with TPS61291DRVR and ADP5070ACPZ-R7, the MAX17227JANT+ uniquely combines 350nA IQ, 880mV startup, resistor-programmable VOUT, and automatic pass-through - making it the only option capable of sustaining multi-year operation in ultra-low-duty-cycle medical and industrial edge devices.

Availability

MAX17227JANT+ is available at Aetrix Electronics and suitable for clinical wearables, low-power IoT edge nodes, battery-powered medical diagnostics, and emergency lighting systems requiring stable component supply with guaranteed long-term availability.

Supply support for MAX17227JANT+ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX17227JANT+ belongs to Analog Devices' nanoPower DC-DC converter product line, engineered specifically for energy-constrained battery systems demanding micropower efficiency, cold-start capability, and minimal solution footprint.

FAQ

What is the minimum input voltage required for MAX17227JANT+ to start up?

The MAX17227JANT+ starts up with a minimum input voltage of 880mV when loaded with ≥3kΩ. This enables reliable operation from deeply discharged primary cells or supercapacitors. Below 880mV, the device remains inactive; above it, the internal circuitry powers on and samples the RSEL resistor before initiating soft-start. The MAX17227JANT+ will not boost if VIN is insufficient to reach the target VOUT during precharge, but pass-through mode activates when VIN exceeds VOUT by ~0.4V.

How does the RSEL pin configure the output voltage on MAX17227JANT+?

The MAX17227JANT+ uses a single resistor from RSEL to GND to set output voltage in 100mV increments from 2.3V to 5.4V - per Table 1 in the datasheet. At startup, the IC sources ~200μA for ~600μs to measure RSEL value; total pin capacitance must remain under 2pF to ensure accuracy. Unlike traditional feedback dividers, RSEL draws current only during this brief acquisition window, preserving efficiency at light loads. The MAX17227JANT+ supports 31 standard values, including 3.3V (191kΩ) and 5.0V (10.0kΩ).

Does MAX17227JANT+ support true shutdown with zero leakage current?

Yes. MAX17227JANT+ implements True Shutdown™, a proprietary feature where both forward and reverse current paths between IN and OUT are fully disconnected when EN is low. Input shutdown current is specified at 1–100nA, and LX leakage is ≤100nA. Additionally, an internal active discharge resistor (225–900Ω) safely bleeds the output capacitor to GND during shutdown - critical for safety compliance in medical and industrial applications. No external discharge circuitry is needed.

What protection features are integrated into MAX17227JANT+?

The MAX17227JANT+ integrates five hardware-based protections: (1) cycle-by-cycle inductor current limit (500mA peak), (2) output short-circuit protection (continuous duty), (3) thermal shutdown (165°C trip, 150°C hysteresis), (4) overtemperature protection active even in shutdown, and (5) input overvoltage clamp (6V absolute max). These operate independently of control logic and remain functional during True Shutdown™, ensuring robustness in fault conditions without software intervention.

Can MAX17227JANT+ operate efficiently at very light loads, such as 1μA?

Yes. The MAX17227JANT+ achieves ≥89% efficiency at 500μA and maintains usable regulation down to ~0.5μA in ultra-low-power mode (ULPM). Its adaptive PFM control skips switching cycles to minimize quiescent loss, resulting in just 350nA supply current - among the lowest in its class. Efficiency at 1μA depends on VIN/VOUT ratio and inductor DCR, but measured data shows >80% typical at 1μA with 1.5V→3.3V conversion. This makes MAX17227JANT+ ideal for intermittently active sensor nodes.