Renesas SLG59M1649V

Overview

SLG59M1649V from Renesas Electronics is a P-channel load switch IC designed for power-rail switching in portable electronics. It delivers 4 A continuous current, features 23 mΩ R_DS(ON) at 5 V input, reverse-current blocking with 50 mV detection threshold, and open-drain FAULT signaling - all in an ultra-small 1.0 × 1.6 mm STDFN package.

For engineers reviewing the SLG59M1649V datasheet, SLG59M1649V pinout, SLG59M1649V application, or SLG59M1649V equivalent, key selection criteria include its VIN UVLO (1.4 V), fast reverse-detect response (10 µs), integrated VOUT discharge (80 Ω typical), and guaranteed operation across –40°C to +85°C industrial temperature range.

Technical Context

The SLG59M1649V integrates a self-powered gate driver for a single pFET switch, enabling operation without external bias. Its reverse-voltage protection logic monitors V_OUT + 50 mV > V_IN and triggers sub-µs FAULT assertion while forcibly opening the switch.

Internal VIN undervoltage lockout (UVLO) disables the switch below 1.4 V (rising) and re-enables only above 0.5 V (falling), preventing erratic behavior during brownout. The ON pin is CMOS-level-sensitive (V_IL < 0.3 V, V_IH > 1 V) with no internal pull-down, requiring direct GPIO connection.

Key Specifications

Pinout & Package

The SLG59M1649V is housed in an 8-pin STDFN package measuring 1.0 mm × 1.6 mm × 0.55 mm, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22916BLYR and AP22653AW5-7, the SLG59M1649V uniquely combines ultra-small 1.0 × 1.6 mm size, 23 mΩ R_DS(ON), hardware reverse-current blocking, and FAULT signaling - making it optimal for space-constrained, battery-powered systems requiring full autonomous rail protection.

Availability

SLG59M1649V is available at Aetrix Electronics and suitable for notebook power sequencing, smartphone peripheral management, digital camera imaging rails, POS terminal interface isolation, and GPS navigation device power control requiring stable component supply and long-term industrial temperature support.

Supply support for SLG59M1649V 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, and mixed-signal solutions for automotive, industrial, and IoT markets.

The SLG59M1649V belongs to Renesas' GreenFET family of ultra-low-power, high-density load switches - engineered specifically for space- and efficiency-critical portable electronics requiring autonomous reverse-current protection and minimal footprint.

FAQ

What is the minimum input voltage required to enable the SLG59M1649V?

The SLG59M1649V incorporates a VIN undervoltage lockout (UVLO) with a rising threshold of 1.4 V. Below this level, the internal control circuitry remains disabled and the pFET switch stays open regardless of ON pin state. This ensures reliable startup behavior and prevents erratic switching during weak or recovering power conditions. The SLG59M1649V will not conduct until VIN exceeds 1.4 V and the ON pin is asserted high.

How does the SLG59M1649V handle reverse-current events?

The SLG59M1649V continuously monitors for reverse voltage using a dedicated comparator that triggers when V_OUT + 50 mV > V_IN. Upon detection, it immediately opens the pFET switch and asserts the open-drain FAULT pin low within 0.5 µs (when ON = HIGH). The FAULT signal remains active until the condition clears and the internal rearmed timer expires (1.5 ms). The SLG59M1649V maintains this protection whether enabled or disabled.

Can the SLG59M1649V be used with a 1.2 V input rail?

No - the SLG59M1649V specifies a minimum operating VIN of 1.5 V per its Absolute Maximum Ratings and Electrical Characteristics tables. At 1.2 V, the internal UVLO remains active, the gate driver lacks sufficient headroom, and R_DS(ON) performance degrades beyond specification. Using the SLG59M1649V below 1.5 V violates datasheet limits and may result in undefined behavior or failure to turn on. For 1.2 V rails, consider alternative load switches explicitly rated for that voltage.

What is the purpose of the dual VIN and dual VOUT pins on the SLG59M1649V?

The SLG59M1649V uses parallel pins (VIN on pins 1 & 4; VOUT on pins 5 & 8) to reduce package inductance and improve current handling capability. This layout minimizes voltage drop and thermal resistance under 4 A continuous load, supporting robust power delivery in compact layouts. It also enhances reliability by distributing current across multiple bond wires and solder joints - a design feature critical for high-current, low-R_DS(ON) operation in the 1.0 × 1.6 mm STDFN package.

Does the SLG59M1649V require an external capacitor on the FAULT pin?

Yes - the FAULT pin is open-drain and requires an external pull-up resistor to the local logic supply (typically 10 kΩ to 1.8 V or 3.3 V). No capacitor is required or recommended on the FAULT line, as the SLG59M1649V asserts and de-asserts the signal with sub-microsecond timing (0.5 µs fault assertion, 2 ms de-assertion delay). Adding capacitance would slow edge rates and compromise fault response integrity. The SLG59M1649V datasheet explicitly specifies a 10 kΩ pull-up resistor only.