Renesas DA9231-0EVZ2

Overview

DA9231-0EVZ2 from Renesas Electronics is an ultra-low quiescent current dual-output PMIC integrating a 300 mA buck regulator and a 100 mA LDO/Load Switch in a single 1.65 mm × 1.25 mm WLCSP package. It delivers 750 nA total input current (buck enabled, LDO disabled, no load), achieves 81% efficiency at 1.8 V/10 µA, and supports I²C-configurable Dynamic Voltage Control for battery-powered wearables and remote sensors.

For engineers reviewing the DA9231-0EVZ2 datasheet, DA9231-0EVZ2 pinout, DA9231-0EVZ2 application, or DA9231-0EVZ2 equivalent, key selection criteria include ultra-low IQ operation down to 10 µA load, dual-supply flexibility with configurable LDO input sourcing (battery or buck output), PSRR optimization capability, and integrated fault monitoring via GPO pin.

Technical Context

The DA9231-0EVZ2 implements a synchronous buck converter with cycle-by-cycle over-current protection, output over-/under-voltage protection, and automatic output discharge. Its buck stage operates from 2.5 V–5.5 V input (min. 2.75 V for start-up) and delivers 0.6 V–1.9 V programmable output via I²C registers.

The integrated LDO supports 0.7 V–3.3 V output and can be reconfigured as a load switch; its input may be connected to either VDD_LDO (battery) or VLDO (buck output) to improve PSRR. Both regulators share a common I²C interface (SCL/SDA) and status reporting through the GPO pin.

Key Specifications

Pinout & Package

DA9231-0EVZ2 is housed in a 12-pin Wafer-Level Chip-Scale Package (WLCSP) measuring 1.65 mm × 1.25 mm, optimized for minimal PCB footprint and thermal performance in thin-profile applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output low-power PMIC applications.

Compared with TPS62748IRYR and MAX77650EWL+T, DA9231-0EVZ2 uniquely balances ultra-low IQ (750 nA), integrated DVC, configurable LDO sourcing, and minimal 1.65 mm × 1.25 mm footprint-making it optimal for space-constrained, multi-rail, battery-life-critical designs where discrete LDO addition is undesirable.

Availability

DA9231-0EVZ2 is available at Aetrix Electronics and suitable for wearable health sensors, smart home door locks, and wireless smoke detectors requiring stable component supply across high-mix, low-volume production runs.

Supply support for DA9231-0EVZ2 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

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog power, and embedded solutions for automotive, industrial, and IoT markets.

The DA9231-0EVZ2 belongs to Renesas' ultra-low-power PMIC product line, designed specifically for energy-harvesting and battery-operated edge devices demanding sub-µA quiescent current and intelligent power sequencing.

FAQ

What is the minimum input voltage required to start up the DA9231-0EVZ2?

The DA9231-0EVZ2 requires a minimum input voltage of 2.75 V on the VDD_SYS pin to initiate startup. Once operational, the buck regulator continues regulating down to 2.5 V input. This startup threshold ensures reliable turn-on across battery discharge curves while maintaining low-voltage hold-up capability during transient drops. The DA9231-0EVZ2's UVLO circuit enforces this behavior without external components.

Can the DA9231-0EVZ2 LDO be used as a load switch, and how is it configured?

Yes, the DA9231-0EVZ2 LDO can be configured as a load switch via I²C register LS_LDO (address 0x23). Setting bit [7] = 1 disables LDO regulation and enables pass-through mode, allowing controlled ON/OFF switching of the VLDO rail. In load switch mode, the device supports input voltages from 0.8 V to 5.5 V and retains all protection features including over-current and thermal shutdown. This functionality is implemented within the DA9231-0EVZ2 without external MOSFETs or drivers.

How does Dynamic Voltage Control (DVC) work in the DA9231-0EVZ2?

Dynamic Voltage Control (DVC) in the DA9231-0EVZ2 allows real-time adjustment of the buck output voltage via I²C writes to the BUCK_CFG register (address 0x22). Up to four pre-programmed voltage levels (DVC[3:0]) can be stored and selected dynamically by host firmware to match processor performance states. This feature reduces dynamic power dissipation during partial-load operation and is fully supported in the DA9231-0EVZ2's register map and timing specifications.

What protection features are integrated into the DA9231-0EVZ2?

The DA9231-0EVZ2 integrates cycle-by-cycle over-current protection, output over-voltage and under-voltage protection, over-temperature shutdown, and automatic output discharge on both buck and LDO rails. Fault conditions are latched and reported in the STATUS register (0x11) and optionally signaled on the GPO pin. These protections operate independently of I²C communication and remain active in all operating modes of the DA9231-0EVZ2, ensuring robust system-level reliability.

Is the DA9231-0EVZ2 pin-compatible with other devices in the DA92xx family?

No, the DA9231-0EVZ2 is not pin-compatible with other DA92xx-series devices such as DA9223 or DA9210. Its 12-pin WLCSP pinout, including dedicated VBUCK_SNS and VDD_LDO terminals, is unique to the DA9231-0EVZ2. While functional similarities exist across the family, mechanical and electrical pin assignments differ, and PCB layout must be designed specifically for the DA9231-0EVZ2 footprint and routing requirements.