Analog Devices Inc./Maxim Integrated MAX20057ATIK/VY+T

Overview

MAX20057ATIK/VY+T from Analog Devices is an automotive-grade triple-output power management IC integrating two synchronous buck converters (3.5A/2A) and a 36V asynchronous boost controller, operating from 3.5V–36V input with cold-crank support down to 2V battery voltage. It delivers fixed 5V/3.3V outputs or adjustable 1V–14V rails, features 2.1MHz/400kHz selectable switching frequency, and operates across –40°C to +125°C for instrument cluster and start-stop system power rails.

For engineers reviewing the MAX20057ATIK/VY+T datasheet, MAX20057ATIK/VY+T pinout, MAX20057ATIK/VY+T application, or MAX20057ATIK/VY+T equivalent, key selection criteria include crank-ready regulation at 2V input, phase-shifted dual-buck operation, spread-spectrum EMI reduction, thermal shutdown at 170°C, and FSYNC-synchronized PLL timing control for AM-band–compliant automotive designs.

Technical Context

The MAX20057ATIK/VY+T implements valley current-mode control in both buck converters with 180° out-of-phase PWM operation to minimize input ripple, while its boost controller uses asynchronous current-mode architecture with external N-MOSFET drive via DL pin. The IC supports three FSYNC modes-forced PWM, skip mode, and external clock synchronization-enabling optimized efficiency or EMI performance per load condition.

It integrates a 5V internal BIAS LDO with EXTVCC switchover capability, undervoltage lockout thresholds at 3.1V (rising) and 2.6V (falling) for BIAS, and 4.5V rising UVLO for boost input. Thermal protection triggers at 170°C with 20°C hysteresis, and cycle-by-cycle current limiting protects all three channels with hiccup-mode recovery.

Key Specifications

Pinout & Package

MAX20057ATIK/VY+T is housed in a thermally enhanced 5mm × 5mm, 28-pin TQFN-EP package (package code T2855Y+5C) with exposed pad for PCB-level heat dissipation. Junction-to-case thermal resistance is 3°C/W, enabling high-power density in automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-output automotive PMIC applications.

Compared with MPQ4333-AEC1 and TPS65321C-Q1, MAX20057ATIK/VY+T uniquely integrates a 36V boost controller enabling true 2V cold-crank operation, supports both fixed and adjustable outputs across all three rails, and offers FSYNC-synchronized phase control-critical for EMI-sensitive infotainment systems.

Availability

MAX20057ATIK/VY+T is available at Aetrix Electronics and suitable for automotive start-stop systems, instrument clusters, navigation head units, and distributed DC power systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX20057ATIK/VY+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 power management semiconductors, serving automotive, industrial, and communications markets with AEC-Q100–qualified components.

The MAX20057ATIK/VY+T belongs to Analog Devices' automotive PMIC portfolio, designed specifically for crank-ready, EMI-conscious power delivery in safety-critical vehicle subsystems operating from –40°C to +125°C.

FAQ

What input voltage range does the MAX20057ATIK/VY+T support, and how does it handle cold-crank conditions?

The MAX20057ATIK/VY+T supports a continuous input voltage range of 3.5V to 36V and maintains regulation during automotive cold-crank events down to 2.05V battery voltage using its integrated 36V asynchronous boost controller. This preboost function ensures Buck1 and Buck2 remain in regulation even when the main battery sags below 3.5V, a critical capability for instrument clusters and start-stop ECUs. The boost controller's UVLO falling threshold can be disabled to extend operation below 2V, as confirmed in the device's absolute maximum ratings and detailed description sections.

How does the MAX20057ATIK/VY+T achieve EMI reduction, and what design impact does that have?

The MAX20057ATIK/VY+T achieves EMI reduction through three complementary features: 2.1MHz fixed-frequency operation (avoiding AM radio band), ±6% spread-spectrum modulation (reducing peak spectral energy), and 180° out-of-phase dual-buck switching (halving input capacitor ripple current). These features collectively lower conducted and radiated emissions without requiring oversized LC filters or shielding. In practice, this enables compact, cost-effective layouts in noise-sensitive applications like navigation head units-verified by typical operating characteristics showing <10dB EMI improvement versus non-spread-spectrum alternatives at 2.1MHz.

What are the key thermal specifications of the MAX20057ATIK/VY+T, and how is heat managed in the package?

The MAX20057ATIK/VY+T features thermal shutdown at 170°C junction temperature with 20°C hysteresis and has a junction-to-case thermal resistance (θJC) of 3°C/W. Its 5mm × 5mm TQFN-EP package includes an exposed pad electrically connected to the die substrate, providing a low-impedance path for heat conduction to the PCB. When mounted with ≥6 thermal vias to an internal ground plane, the package achieves a junction-to-ambient (θJA) of 27°C/W on a four-layer board-enabling reliable 3.5A/2A continuous operation in under-hood environments without forced airflow.

Can the MAX20057ATIK/VY+T be synchronized to an external clock, and what are the timing constraints?

Yes, the MAX20057ATIK/VY+T supports external clock synchronization via the FSYNC pin, using a phase-locked loop (PLL) to align internal switching edges. For 2.1MHz operation, FSYNC requires a minimum high pulse width of 100ns and accepts frequencies from 1.8MHz to 2.6MHz; for 400kHz operation, minimum pulse width is 1.5μs and frequency range is 250kHz to 550kHz. The PLL ensures Buck1's LX1 falling edge aligns with FSYNC rising edge, Buck2's LX2 falling edge aligns with FSYNC falling edge, and boost DL rising edge aligns with FSYNC falling edge-enabling precise multi-rail timing coordination in complex automotive systems.

What are the quiescent current values of the MAX20057ATIK/VY+T in different operational states?

The MAX20057ATIK/VY+T delivers ultra-low quiescent current: 1μA when all regulators are disabled (standby), 10μA with only the 5V Buck1 active, 8μA with only the 3.3V Buck2 active, and 30μA with all three regulators (Buck1, Buck2, boost) enabled. These values are measured at TA = +25°C with no switching activity and confirm compliance with stringent OEM requirements for always-on modules. The low I_Q is achieved via adaptive biasing, gated internal circuitry, and optional EXTVCC switchover to bypass the internal 5V LDO-directly supporting extended battery life in parked vehicle scenarios.