Renesas SLG59H1020V

Overview

SLG59H1020V from Renesas Electronics is a 20 V, 50 mΩ, 3 A reverse-blocking NMOS load switch with VIN overvoltage lockout select and analog MOSFET current monitor output (10 µA/A). It integrates back-to-back FETs for bidirectional blocking, supports 4.5–20 V input rails, and delivers stable R_DS(ON) across temperature and voltage. It is deployed in high-performance computing power-rail switching where precise inrush control and real-time current monitoring are required.

For engineers reviewing the SLG59H1020V datasheet, SLG59H1020V pinout, SLG59H1020V application, or SLG59H1020V equivalent, key selection criteria include its 4-level VIN OVLO selectability via SEL0/SEL1 pins, capacitor-adjustable slew rate (CSLEW), resistor-programmable active current limit (RSET), open-drain FAULT signaling, and 18-pin STQFN package with fused VIN/VOUT terminals for low-inductance, high-current routing.

Technical Context

The SLG59H1020V implements a proprietary high-voltage GreenFET architecture with dual back-to-back n-channel MOSFETs enabling true reverse-current blocking when OFF. Its state machine manages turn-on slew rate, active current limiting, SOA protection (5 W threshold), and thermal shutdown (125 °C trip).

It features a self-powered gate driver with integrated charge pump, eliminating external bias requirements. The analog IOUT monitor provides 10 µA/A linearity (0.5–3 A range) with 45 µs response time, while FAULT asserts within 80 µs on overvoltage, overcurrent, or overtemperature events.

Key Specifications

Pinout & Package

SLG59H1020V is housed in a RoHS-compliant, 1.6 × 3.0 mm, 0.40 mm pitch STQFN-18 package with exposed thermal pad. The layout fuses multiple pins per function (5× VIN, 5× VOUT) to minimize trace inductance and thermal resistance for high-current paths.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22992DNYT and RTQ2132BGQW, the SLG59H1020V uniquely integrates reverse blocking, 4-level VIN OVLO select, and analog current monitoring in a single 1.6 × 3.0 mm package - reducing component count and PCB area for high-voltage industrial and computing power sequencing.

Availability

SLG59H1020V is available at Aetrix Electronics and suitable for power-rail switching, multifunction printers, telecommunications equipment, and high-performance computing applications requiring stable component supply, extended temperature operation (-40 °C to +85 °C), and RoHS-compliant packaging.

Supply support for SLG59H1020V 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 products for automotive, industrial, infrastructure, and IoT markets.

The SLG59H1020V belongs to Renesas' High Voltage GreenFET load switch family, engineered specifically for robust, high-current power sequencing in space-constrained industrial and computing systems with stringent reliability and protection requirements.

FAQ

What is the maximum input voltage the SLG59H1020V can withstand continuously?

The SLG59H1020V supports continuous input voltages from 4.5 V to 20 V. Its absolute maximum rating allows pulsed VIN up to 32 V for <0.1 s, and the device itself is 29-V tolerant - enabling safe operation under transient overvoltage conditions common in industrial power rails. This makes SLG59H1020V suitable for 20 V nominal systems with margin for surge events.

How does the SLG59H1020V achieve reverse-current blocking?

The SLG59H1020V uses two back-to-back n-channel MOSFETs in series, configured so that when the device is OFF, both FETs are biased into cutoff - blocking current flow in either direction between VIN and VOUT. This eliminates the need for an external blocking diode and ensures reverse leakage remains below 3 µA at VOUT = 20 V and VIN = 0 V, as specified in the datasheet.

Can the SLG59H1020V's current limit be adjusted, and how?

Yes, the SLG59H1020V's active current limit (IACL) is resistor-programmable via the RSET pin. A 1%-tolerance metal-film resistor between 30 kΩ and 91 kΩ sets IACL from 3 A down to 1 A - e.g., 30.1 kΩ yields 3.2 A typical, while 91 kΩ yields 1 A. This adjustment directly affects short-circuit response and SOA behavior, and is validated across -40 °C to +85 °C.

What is the purpose of the CAP pin on the SLG59H1020V?

The CAP pin on the SLG59H1020V connects to an external 10–20 nF ceramic capacitor that controls the VOUT slew rate and total turn-on time. This capacitor sets the linear ramp of the output voltage during startup, preventing inrush current spikes that could trigger SOA protection or cause bus droop. The value is selected based on load capacitance and desired ramp time per the Safe Start-up Loading tables in the datasheet.

Does the SLG59H1020V provide analog current monitoring, and what is its accuracy?

Yes, the SLG59H1020V provides an analog current monitor output (IOUT) with a nominal transfer function of 10 µA per ampere of load current. At IDS = 1 A, the output is 9.3–10.7 µA (±7%), and linearity is optimized for 0.5–3 A. With a ground-referenced RIOUT resistor (e.g., 84.5 kΩ), this yields 0.8–3.0 V output, enabling direct ADC interfacing without signal conditioning for SLG59H1020V current telemetry.