Analog Devices Inc./Maxim Integrated MAXM17724AMB+T

Overview

The MAXM17724AMB+T from Analog Devices is a Himalaya-series dual-output uSLIC™ power module integrating a 4V–60V input, 150mA synchronous step-down DC-DC converter and a 50mA high-PSRR linear regulator in a single compact package. It delivers adjustable buck output (2.5V–5V) and fixed LDO output (3.3V), with ±2% FB accuracy, ±1.3% LDO output accuracy, and 5.1ms typical soft-start - used in industrial sensors and programmable logic controllers requiring robust, low-noise dual-rail power.

For engineers reviewing the MAXM17724AMB+T datasheet, MAXM17724AMB+T pinout, MAXM17724AMB+T application, or MAXM17724AMB+T equivalent, key selection criteria include its 10-pin uSLIC™ package, 350kHz–2.2MHz programmable switching frequency, PFM/PWM mode selection, open-drain RESET output, and internal inductor/compensation enabling minimal external components.

Technical Context

The MAXM17724AMB+T employs peak-current-mode control for its step-down converter, with internal slope compensation and cycle-by-cycle current limiting. Its adjustable buck output (via FB resistor divider) feeds directly into the integrated 3.3V LDO, which features independent soft-start (1.1ms), dropout voltage ≤450mV at 50mA, and thermal shutdown at 160°C.

It supports prebias startup, hiccup-mode overcurrent protection (51ms timeout), and external clock synchronization on MODE/SYNC (1.1×–1.4× f_SW). The RESET pin monitors both OUTB and OUTL, asserting low within 4μs if either falls below 92% or 91.5% of nominal, respectively - active only in PWM mode.

Key Specifications

Pinout & Package

Package: 10-pin uSLIC™ (2.6mm × 3mm × 1.5mm), RoHS-compliant, M102A3+3 outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output regulator applications.

Compared with MAXM17720AMB+T and MAXM17726AMB+T, the MAXM17724AMB+T uniquely combines adjustable buck output with a fixed 3.3V LDO - optimizing for mixed-signal systems needing both a programmable analog supply and a standard 3.3V digital rail in minimal board area.

Availability

MAXM17724AMB+T is available at Aetrix Electronics and suitable for industrial sensors, programmable logic controllers, and battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MAXM17724AMB+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAXM177xx Himalaya uSLIC™ power module family was designed to replace discrete DC-DC + LDO solutions in space-constrained, thermally demanding industrial and instrumentation applications - emphasizing integration, reliability, and simplified qualification.

FAQ

What is the output voltage configuration of the MAXM17724AMB+T?

The MAXM17724AMB+T features an adjustable step-down converter output (2.5V to 5V, set via external FB resistor divider) and a fixed 3.3V linear regulator output. This dual-rail architecture supports systems requiring both a programmable analog supply and a standard digital I/O rail - all within the same uSLIC™ module. The MAXM17724AMB+T's FB reference voltage is 0.8V (typ), enabling precise output setting across its full range.

Does the MAXM17724AMB+T support prebias startup?

Yes, the MAXM17724AMB+T supports soft-start into a prebiased OUTB output without discharging the output capacitor - in both PWM and PFM modes. This capability is critical for reliable power sequencing in multi-rail systems such as those using FPGAs or application processors, where one rail may already be energized when the MAXM17724AMB+T is enabled. The internal control logic prevents reverse current flow during startup.

What is the function of the MODE/SYNC pin on the MAXM17724AMB+T?

The MODE/SYNC pin on the MAXM17724AMB+T serves two functions: selecting PWM or PFM operation, and synchronizing the internal oscillator to an external clock. Grounding the pin forces constant-frequency PWM mode; leaving it unconnected enables automatic PFM at light loads. When driven with an external clock (1.1×–1.4× f_SW), it locks the switching frequency to reduce EMI peaks - a key advantage in noise-sensitive industrial environments where the MAXM17724AMB+T is commonly deployed.

Can the MAXM17724AMB+T operate from a 12V input while delivering 150mA at 3.3V on OUTL?

No - the MAXM17724AMB+T's linear regulator (OUTL) draws its input from the buck output (OUTB). To deliver 50mA at 3.3V on OUTL, OUTB must be ≥3.75V (accounting for worst-case dropout of 450mV). Therefore, with a 12V input, the buck must be configured to output ≥3.75V (e.g., 4V or 5V), and total combined load (OUTB + OUTL) must not exceed 150mA. The MAXM17724AMB+T's architecture inherently couples these rails, requiring coordinated output voltage selection.

Is the RESET output of the MAXM17724AMB+T active in PFM mode?

No, the RESET output of the MAXM17724AMB+T is disabled in PFM mode. It only functions in PWM mode, where it monitors FB (OUTB) and OUTL voltages, pulling low if either drops below 92% or 91.5% of nominal, respectively. In PFM mode, the internal timing and regulation behavior changes significantly - including hibernate cycles and variable frequency - making reliable power-good assertion impractical. Designers must use PWM mode if system-level reset sequencing depends on the MAXM17724AMB+T's RESET pin.