Renesas DA9233-A1VZ2

Overview

DA9233-A1VZ2 from Renesas Electronics is an integrated ultra-low quiescent current buck regulator (60 mA, <10 mV output ripple) and ultra-low IQ LDO (100 mA) in a single 12-pin WLCSP package. It delivers dynamic voltage control, I²C programmability, and dual-supply capability for battery-powered wearables and remote sensors requiring high light-load efficiency down to 20 µA.

For engineers reviewing the DA9233-A1VZ2 datasheet, DA9233-A1VZ2 pinout, DA9233-A1VZ2 application, or DA9233-A1VZ2 equivalent, this device supports precise output voltage selection (buck: 0.6–1.9 V; LDO: 0.7–3.3 V), thermal/UVLO protection, GPO event monitoring, and flexible input sourcing (LDO input selectable between battery or buck output).

Technical Context

The DA9233-A1VZ2 integrates a synchronous buck converter with PMOS/NMOS FETs (RON_PMOS = 600–800 mΩ, RON_NMOS = 300–450 mΩ) and a low-dropout linear regulator with configurable load-switch functionality. Its 1.5 MHz switching frequency enables compact 1.0 µH inductor use, while the buck's DVC feature allows real-time output voltage adjustment via I²C to match system power states.

The LDO operates across 1.8–5.5 V input and supports programmable output from 0.7 V to 3.3 V in 100 mV steps; its input can be connected to either VDD_SYS (battery) or VBUCK_SNS (buck output) to optimize PSRR. The GPO pin provides configurable power-good indication, fault flagging, or reset pulse generation under register control.

Key Specifications

Pinout & Package

DA9233-A1VZ2 uses a 1.65 mm × 1.25 mm × 0.5 mm, 12-pin Wafer-Level Chip-Scale Package (WLCSP) with bottom-side ball layout optimized for minimal PCB footprint in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62748IRYR and MAX20004AATP+T, DA9233-A1VZ2 uniquely combines ultra-low IQ (<1 µA), integrated DVC, GPO-based fault signaling, and sub-2 mm² WLCSP in a single die - making it optimal for space- and energy-constrained consumer IoT endpoints where dual-rail flexibility and event awareness are essential.

Availability

DA9233-A1VZ2 is available at Aetrix Electronics and suitable for wearable sensor hubs, smart thermostat nodes, wireless smoke detectors, portable medical patches, and remote environmental sensors requiring stable component supply across long-life battery applications.

Supply support for DA9233-A1VZ2 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 industrial, automotive, and IoT markets.

The DA9233-A1VZ2 belongs to Renesas' DA-series ultra-low-power PMIC family, designed specifically for battery-operated edge devices demanding nanoscale quiescent current, high light-load efficiency, and intelligent power sequencing.

FAQ

What is the minimum input voltage required to start up the DA9233-A1VZ2 buck regulator?

The DA9233-A1VZ2 requires a minimum input voltage of 2.75 V on VDD_SYS to initiate buck startup. Once operational, the input voltage may drop to 2.5 V while maintaining regulation. This UVLO rising threshold ensures reliable initialization even with partially discharged batteries, and the 200 mV hysteresis prevents oscillation near the threshold. The DA9233-A1VZ2 datasheet specifies this behavior in Table 4 and Section 10.2.

Can the DA9233-A1VZ2 LDO operate independently of the buck regulator?

Yes, the DA9233-A1VZ2 LDO can operate independently: its input (VDD_LDO) may be connected directly to the battery (VDD_SYS) regardless of buck state, and it supports input voltages from 1.8 V to 5.5 V in LDO mode. When the buck is disabled, the LDO continues regulating as long as its input voltage remains within spec and IC_EN is asserted. This enables flexible power sequencing in multi-rail systems.

How does the DA9233-A1VZ2 achieve ultra-low output ripple below 10 mV?

The DA9233-A1VZ2 achieves <10 mV peak-to-peak buck output ripple through synchronous switching architecture with tightly matched PMOS/NMOS FETs (RON_PMOS = 600–800 mΩ, RON_NMOS = 300–450 mΩ), optimized gate drive timing, and integrated feedback compensation. Combined with a recommended 1.0 µH inductor and 22 µF ceramic output capacitor, the design minimizes switching noise injection into sensitive analog circuits without external filters - a key specification verified in Figure 4–5 and Table 6 of the DA9233-A1VZ2 datasheet.

What protection features are integrated into the DA9233-A1VZ2?

The DA9233-A1VZ2 integrates cycle-by-cycle overcurrent protection on the buck switch, output over-voltage and under-voltage detection, thermal shutdown at 125 °C with 20 °C hysteresis, and input under-voltage lockout (UVLO) with rising/falling thresholds at 2.75 V / 2.4–2.5 V. All faults generate flags accessible via I²C STATUS register and optionally signaled on the GPO pin - eliminating need for external supervisors in most battery-powered designs.

Is the DA9233-A1VZ2 pin-compatible with other devices in the DA92xx family?

No, the DA9233-A1VZ2 is not pin-compatible with other DA92xx variants such as DA9232 or DA9234. While sharing functional similarities, the DA9233-A1VZ2 uses a unique 12-pin WLCSP layout defined in Figure 3 and Table 1 of its datasheet. Pin assignments for VDD_LDO, VLDO, and GPO differ across the family, and register maps are not interchangeable. System-level compatibility requires validation against the specific DA9233-A1VZ2 pinout and electrical characteristics.