Renesas SLG46585M

Overview

SLG46585M from Renesas Electronics is a programmable mixed-signal matrix IC integrating an asynchronous state machine, four 150 mA configurable LDOs, and a 1 A synchronous DC/DC buck converter operating from 1–2 MHz. It features fifteen combination-function macrocells, analog comparators with internal voltage reference, an analog temperature sensor, and I²C target interface. It is used for power sequencing, LED/haptic motor control, and analog signal conditioning in space-constrained portable electronics.

For engineers reviewing the SLG46585M datasheet, SLG46585M pinout, SLG46585M application, or SLG46585M equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options - all grounded in Renesas' official Revision 3.13 datasheet (Feb 2025) and MSTQFN-29 package documentation.

Technical Context

The SLG46585M implements a user-programmable asynchronous state machine with eight states and flexible transition logic, enabling deterministic event-driven control without clock synchronization overhead. Its mixed-signal architecture integrates analog comparators (with 1.2 V reference), a 1.73 kHz low-power oscillator, and a configurable 25 kHz/2 MHz oscillator - all accessible via I²C or internal routing.

Power management is handled by four independent LDOs (150 mA HP mode / 100 µA LP mode / load-switch mode) and a constant-on-time DC/DC converter supporting CCM/DCM operation, soft-start, UVLO, and thermal shutdown - all configurable through non-volatile memory.

Key Specifications

Pinout & Package

MSTQFN-29L package: 3 mm × 3 mm body, 0.4 mm pitch, 0.55 mm height, exposed thermal pad. Pin numbering follows standard counter-clockwise sequence starting from top-left corner (Pin 1 marked).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal power management applications.

Compared with SLG46585M, SLG46580V offers reduced integration at lower cost and smaller size, while SLG46620V provides higher power capability and expanded programmability at increased footprint - making SLG46585M the optimal balance for mid-range portable electronics needing integrated 1 A DC/DC and four LDOs in minimal area.

Availability

SLG46585M is available at Aetrix Electronics and suitable for smartphone power sequencing, wearable LED/haptic control, and compact IoT power plane reduction requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for SLG46585M 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 Corporation is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and consumer markets.

The SLG46585M belongs to Renesas' GreenPAK™ programmable mixed-signal product line, designed specifically to replace discrete analog and digital logic in portable and space-constrained electronics with field-configurable, low-power, monolithic alternatives.

FAQ

What is the maximum output current of the DC/DC converter in SLG46585M?

The SLG46585M integrates a synchronous constant-on-time DC/DC buck converter rated for 1 A continuous output current. This specification is confirmed in Section 21.1 of the official Renesas datasheet (Revision 3.13, Feb 2025), under "DC/DC Buck Converter Description". The converter supports adjustable output voltage (0.6–5.0 V), switching frequencies of 1–2 MHz, and operates in both continuous and discontinuous conduction modes.

Does SLG46585M support I²C master functionality?

No, SLG46585M implements I²C target (slave) mode only, as stated in Section 19.1 of the datasheet. It responds to commands from an external I²C master (e.g., host MCU) for register access, RAM read/write, and OTP programming. There is no hardware support for initiating transactions or acting as a bus master - all communication must be initiated externally.

How many LDOs does SLG46585M include, and what are their key operating modes?

The SLG46585M includes four independent LDO regulators, each configurable in three modes: High Power Mode (150 mA output), Low Power Mode (100 µA output), and Power Switch Mode (acting as a load switch). These modes are controlled via dedicated register bits and are detailed in Section 20.1 of the Renesas datasheet. Each LDO supports independent voltage selection and soft-start configuration.

Can SLG46585M operate without external passive components for its DC/DC converter?

No, SLG46585M requires external components for DC/DC operation: a power inductor, output capacitor, and optional input capacitor. Section 21.3 ("Typical Application Circuit") specifies minimum values and layout guidelines. While the controller is fully integrated, the power stage relies on external magnetics and capacitance - consistent with standard buck converter topology requirements.

Is the asynchronous state machine in SLG46585M reprogrammable after initial configuration?

Yes, the asynchronous state machine logic in SLG46585M is stored in one-time programmable (OTP) non-volatile memory, which can be programmed once during manufacturing or prototyping. Unlike flash-based devices, it cannot be erased or rewritten in-system. However, runtime behavior (e.g., state transitions, input conditions) can be modified via I²C-accessible control registers that affect macrocell routing and comparator thresholds - enabling partial functional updates without reflashing.