Analog Devices Inc./Maxim Integrated MAX20030BATMD/V+

Overview

MAX20030BATMD/V+ from Maxim Integrated is an automotive-grade dual synchronous step-down controller with integrated preboost circuitry and high-voltage 200mA LDO, designed for front-end power management in cold-crank–capable systems. It delivers regulated 5V (Buck 1) and 3.3V (Buck 2) outputs, operates from 2V input (with preboost enabled), supports up to 2.2MHz switching, and maintains regulation across -40°C to +125°C - used in instrument clusters and navigation head units.

For engineers reviewing the MAX20030BATMD/V+ datasheet, MAX20030BATMD/V+ pinout, MAX20030BATMD/V+ application, or MAX20030BATMD/V+ equivalent, key selection considerations include its 17µA quiescent current with Buck 1 enabled, 180° out-of-phase dual-buck operation, resistor-programmable frequency (220kHz–2.2MHz), spread-spectrum EMI reduction, and thermally enhanced 48-pin TQFN package with exposed pad.

Technical Context

The MAX20030BATMD/V+ implements three independent current-mode controllers: two synchronous buck channels operating 180° out of phase to reduce input ripple, and a dedicated synchronous boost (preboost) channel activated below ~3.5V input to sustain VOUT1/VOUT2 regulation down to 2V battery. Its control architecture supports forced PWM, skip mode, and external synchronization via FSYNC.

It integrates a high-voltage 200mA LDO (VINLDO = 3.5V–36V) with adjustable output (1.5V–10V) or factory-set 5V/3.3V, plus comprehensive protection including cycle-by-cycle current limiting, thermal shutdown at 170°C, overvoltage/undervoltage lockout, and PGOOD monitoring for all three regulated outputs.

Key Specifications

Pinout & Package

MAX20030BATMD/V+ is housed in a thermally enhanced 7mm × 7mm, 48-pin TQFN package with exposed pad (EP = GND). The package features separate AGND (signal ground) and multiple PGND pins (PGND1, PGND2, PGND3, PGND4) for optimal noise isolation and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail automotive power management applications.

Compared with MAX20031BATMD/V+, the MAX20030BATMD/V+ offers marginally higher CDM tolerance on corner pins; versus TPS65321A-Q1, it uniquely provides integrated preboost for true 2V cold-crank operation - a critical differentiator for modern stop-start vehicles.

Availability

MAX20030BATMD/V+ is available at Aetrix Electronics and suitable for instrument cluster, navigation head unit, and distributed DC power system designs requiring stable component supply across automotive production lifecycles.

Supply support for MAX20030BATMD/V+ 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 automotive, industrial, and communications markets.

The MAX20030/MAX20031 product line targets automotive front-end power supplies requiring cold-crank resilience, ultra-low IQ, and EMI-compliant high-frequency operation - specifically engineered for next-generation ADAS and digital cockpit platforms.

FAQ

What is the cold-crank input voltage limit supported by the MAX20030BATMD/V+?

The MAX20030BATMD/V+ sustains regulation of both Buck 1 (5V) and Buck 2 (3.3V) outputs down to 2V input when the integrated preboost controller is enabled. This is achieved by activating the synchronous boost stage to elevate the input to the buck controllers during low-battery conditions such as automotive cold-crank events. The preboost is automatically engaged when VIN falls below ~3.5V, and the MAX20030BATMD/V+ remains fully operational across the full -40°C to +125°C temperature range at 2V input.

Does the MAX20030BATMD/V+ support external clock synchronization?

Yes, the MAX20030BATMD/V+ supports external clock synchronization via the FSYNC pin. When an external clock signal is applied to FSYNC, the internal switching frequency locks to that source with 1:1 ratio. The FSYNC input accepts frequencies from 250kHz to 2.6MHz depending on RFOSC setting, and requires a minimum pulse width of 150ns. This feature enables deterministic EMI reduction and timing alignment across multiple power stages in complex automotive systems.

How is the output voltage of the integrated LDO configured on the MAX20030BATMD/V+?

The MAX20030BATMD/V+ LDO output voltage is factory-configured: the /V+ suffix denotes a 5V fixed output (VOUT4 = 5.0V ±2%), while other variants (e.g., /V+T) may specify 3.3V. The LDO is enabled via EN4 and accepts input from INLDO (3.5V–36V). For adjustable outputs (1.5V–10V), a resistor divider is connected between OUT4, FB4, and PGND4 to set feedback at 1.25V. The LDO delivers up to 200mA with 500mV dropout at full load and includes overcurrent and thermal protection.

What is the purpose of the TERM pin on the MAX20030BATMD/V+?

The TERM pin on the MAX20030BATMD/V+ serves as a ground switch for the preboost converter's feedback divider. When the preboost controller is disabled (EN3 low), TERM opens to disconnect the lower leg of the FB3 resistive divider from ground, preventing erroneous regulation or leakage paths. When EN3 is asserted, TERM closes to complete the divider network. This ensures accurate boost output voltage setting only during active preboost operation and avoids interference with buck regulation during normal battery conditions.

Can the MAX20030BATMD/V+ operate without the BIAS capacitor?

No, the MAX20030BATMD/V+ requires a minimum 6.8µF low-ESR ceramic capacitor between BIAS and AGND. The BIAS pin supplies internal circuitry and external gate drivers; omitting or undersizing this capacitor causes instability, erratic switching, or failure to start. The datasheet specifies 6.8µF as the minimum value, and recommends X5R/X7R dielectrics with adequate voltage rating. If EXTVCC is used (3.25V–5.5V), the internal BIAS LDO is disabled, but BIAS must still be bypassed as it remains active for gate drive and internal biasing functions.