Renesas DA9313-04VK2

Overview

DA9313-04VK2 from Renesas Electronics is a high-efficiency dual-cell switched capacitor voltage divider IC designed for 2S Li-ion/Li-polymer battery systems, delivering up to 10 A output current at VOUT = ½ VIN (5–10.5 V input → 2.5–5.25 V output), with integrated power switches and I²C programmability for ultrabooks and portable power banks.

For engineers reviewing the DA9313-04VK2 datasheet, DA9313-04VK2 pinout, DA9313-04VK2 application, or DA9313-04VK2 equivalent, key selection considerations include its 43-pin WLCSP package, master/slave scalability to 20 A, 98% peak efficiency, 55 µA quiescent current in standalone mode, and integrated over-temperature/over-current protection without external sensing.

Technical Context

The DA9313-04VK2 implements a fixed-ratio (2:1) switched-capacitor topology with automatic frequency control, eliminating inductors while maintaining high efficiency across load and input voltage ranges. It supports both standalone operation and synchronized master/slave configuration via I²C interface and dedicated MS_IF pin.

Its digital core includes configurable POR, UVLO (4.6–6.15 V, 50 mV steps), thermal warning/critical thresholds (110–140 °C / 125–155 °C), and programmable soft-start-enabling robust power sequencing in compact, thermally constrained applications like tablets and DSLR cameras.

Key Specifications

Pinout & Package

Package: 43-ball WLCSP (0.65 mm pitch), 2.53 mm × 2.53 mm footprint, 1.0 mm max component height - optimized for ultra-thin portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar switched-capacitor voltage divider applications.

Compared with MP5418GQZ and TPS6128825RGER, the DA9313-04VK2 uniquely combines inductorless 2:1 conversion, 10–20 A scalability, I²C configurability, and sub-1 mm height - making it the only option meeting all three constraints for next-gen ultraportables and high-density power banks.

Availability

DA9313-04VK2 is available at Aetrix Electronics and suitable for ultrabooks, DSLR cameras, and portable power banks requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLCSP packaging.

Supply support for DA9313-04VK2 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 management, and timing solutions for automotive, industrial, and consumer markets.

The DA9313-04VK2 belongs to Renesas' DA9xxx PMIC family, engineered specifically for high-efficiency, ultra-compact power conversion in battery-powered mobile and imaging devices.

FAQ

What is the exact input-to-output voltage relationship of the DA9313-04VK2?

The DA9313-04VK2 implements a fixed 2:1 voltage division ratio: VOUT = ½ VIN. With a 5–10.5 V input range, it delivers a corresponding 2.5–5.25 V output. This ratio is hardwired by the switched-capacitor architecture and cannot be adjusted via I²C or external components. The DA9313-04VK2 maintains this ratio across all operating modes, including master/slave configuration and automatic frequency control.

Does the DA9313-04VK2 require external flying capacitors, and what are the recommended values?

Yes, the DA9313-04VK2 requires four external ceramic flying capacitors: two for C1P/C1N and two for C2P/C2N. Per the datasheet (Table 39), Renesas recommends 22 µF ±20%, 10 V X5R/X7R MLCCs with low ESR (<5 mΩ) and case size 0603 or larger. These capacitors must be placed symmetrically and as close as possible to their respective pins to minimize loop inductance and ensure stable charge transfer in the DA9313-04VK2.

Can the DA9313-04VK2 operate without an I²C interface, and what functionality is lost?

Yes, the DA9313-04VK2 supports fully autonomous operation without I²C: SCL and SDA pins must be tied to GND per datasheet guidance. In this mode, default register settings apply - including fixed UVLO (5.0 V), PG threshold (3.0 V), and automatic frequency mode. Programmable features like thermal warning level, soft-start duration, master/slave configuration, and fault log access are unavailable without I²C connectivity to the DA9313-04VK2.

How does master/slave operation affect the quiescent current of the DA9313-04VK2?

In master/slave configuration, the DA9313-04VK2 master unit draws ~60 µA and the slave unit draws ~10 µA (typical, no load), totaling ~70 µA - versus 55 µA for a standalone DA9313-04VK2. This increase reflects active synchronization overhead and additional bias current for the MS_IF interface. Both units retain independent thermal and over-current protection, and the combined 20 A output remains coordinated via hardware handshake, not I²C polling.

What is the thermal performance limit for continuous operation of the DA9313-04VK2?

The DA9313-04VK2 is rated for continuous operation up to +85 °C ambient temperature (TA), with junction temperature (TJ) limited to +125 °C. Its thermal resistance θJA is 36.8 °C/W. At 10 A output and 7.4 V input, typical power dissipation is ~220 mW; with proper PCB copper area (≥4 cm² 2-oz inner layer), junction temperature stays ~15 °C above ambient. Thermal shutdown triggers at TJ ≥140 °C (critical threshold), and warning asserts at TJ ≥125 °C - both configurable within the DA9313-04VK2's register set.