Renesas SLG59M1736C

Overview

SLG59M1736C from Renesas Electronics is a single-channel pFET load switch optimized for space-constrained portable electronics, featuring 33 mΩ R_DS(ON) at 5.5 V, 2.2 A continuous current capability, controlled inrush current limiting (16.5 mA typical), and ultra-small 0.8 mm × 0.8 mm 4-pin WLCSP packaging. It operates from 2.5 V to 5.5 V and delivers 0.1 µA no-load supply current.

For engineers reviewing the SLG59M1736C datasheet, SLG59M1736C pinout, SLG59M1736C application, or SLG59M1736C equivalent, key selection criteria include inrush-controlled turn-on timing (7.6 ms typical rise time with 30 µF load), integrated V_OUT discharge (90 Ω typical), thermal performance (110 °C/W θ_JA), and compatibility with health-monitoring and wearable power sequencing requirements.

Technical Context

The SLG59M1736C integrates a proprietary CuFET p-channel MOSFET with voltage-dependent R_DS(ON) (33–56.1 mΩ across 2.5–5.5 V input range) and an internal inrush current control circuit that activates only after VIN exceeds 0.9×VIN threshold (VSUCC(TH)). Its ON pin is a CMOS-level-sensitive input without internal pull-down, requiring active drive from a microcontroller GPO.

Turn-on behavior is defined by slew-rate-limited V_OUT ramp-up (0.54 V/ms typical), governed by fixed I_RISE (16.5 mA) and external C_LOAD, while turn-off is fast (4.5 µs OFF delay). The device includes an integrated 90 Ω V_OUT discharge path and supports safe operation up to 2.2 A continuous load at 5 V input.

Key Specifications

Pinout & Package

SLG59M1736C uses a Pb-free, halogen-free 4-pin Wafer-Level Chip-Scale Package (WLCSP) measuring 0.8 mm × 0.8 mm with 0.4 mm pitch. The package features laser-marked pin 1 index (A1 corner) and is rated MSL-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pFET load switch applications.

Compared with TPS22915BYFPR and BD75020GUL, the SLG59M1736C uniquely combines integrated V_OUT discharge, factory-trimmed inrush current limiting, and sub-µA quiescent draw in a 0.8 mm × 0.8 mm WLCSP - making it optimal for battery-sensitive wearables where BOM reduction and startup predictability are critical.

Availability

SLG59M1736C is available at Aetrix Electronics and suitable for smart wearable power sequencing, portable health monitor subsystem enable, compact hearing aid audio path enable, and low-power IoT edge node peripheral management requiring stable component supply and long-term production continuity.

Supply support for SLG59M1736C 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power management, and timing solutions for automotive, industrial, and consumer markets.

The SLG59M1736C belongs to Renesas' GreenFET family of ultra-compact, high-efficiency load switches designed specifically for battery-powered portable and medical devices demanding minimal footprint, precise inrush control, and ultra-low quiescent power.

FAQ

What is the maximum recommended output capacitance for SLG59M1736C?

The SLG59M1736C is characterized and specified for operation with up to 30 µF output capacitance (C_LOAD). Exceeding this value may degrade inrush current control, extend rise time beyond the 11 ms maximum, and risk violating the device's safe operating area during startup. For loads requiring >30 µF, external inrush limiting or staged enable is required. Always verify stability with actual C_LOAD and R_LOAD in the target application.

Does SLG59M1736C require an external pull-down resistor on the ON pin?

No, SLG59M1736C does not include an internal pull-down resistor on the ON pin, but an external pull-down is not required if the driving source (e.g., microcontroller GPIO) actively controls the pin state. The datasheet explicitly warns against leaving the ON pin open-circuited. SLG59M1736C expects a clean CMOS-level signal with V_IH > 0.85 V and V_IL < 0.3 V - best achieved via direct GPO connection.

Can SLG59M1736C operate reliably at 2.5 V input with full 2.2 A load current?

No. At 2.5 V input, the SLG59M1736C's maximum continuous output current is derated to 1.2 A, as specified in the Electrical Characteristics table. Attempting 2.2 A at 2.5 V exceeds the safe operating area, increases R_DS(ON) to 68.2 mΩ (at 85 °C), and risks thermal shutdown or premature failure. SLG59M1736C delivers full 2.2 A only at VIN ≥ 5 V.

How does the SLG59M1736C's inrush current control function during power-up?

The SLG59M1736C's inrush control activates automatically once VIN reaches 90% of its nominal value (VSUCC(TH)). Only then will a HIGH transition on the ON pin initiate controlled VOUT ramp-up at 16.5 mA (typical), limiting dV/dt to 0.54 V/ms with 30 µF load. If ON is asserted before VIN reaches VSUCC(TH), inrush control is disabled and uncontrolled turn-on occurs - potentially damaging downstream components.

What is the thermal performance limit of SLG59M1736C under continuous 2.2 A load at 5 V?

Under continuous 2.2 A at 5 V input, SLG59M1736C dissipates approximately 160 mW (P = I² × R_DS(ON) = 2.2² × 0.033). With θ_JA = 110 °C/W and TA = 25 °C, junction temperature rises to ~42.6 °C - well within the -40 °C to 85 °C operating range. This assumes the recommended PCB layout: 1 in², 2 oz copper pads under VIN and VOUT pins. Reduced copper area increases TJ proportionally.