NUD3160LT1G Integrated Circuits (ICs)

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Basic information parameters

Model: NUD3160LT1G

Manufacturer: ON Semiconductor

Type: Load switch/relay driver (with integrated protection)

Package: SOT-23-3L (small SMD package, 3 pins)

Operating voltage: 4.5V ~ 36V (wide input range)

Operating temperature: -40°C ~ +125°C (industrial grade)

Compliant with standards: AEC-Q101 (automotive grade certification)

Input voltage range: 4.5V ~ 36V

Output voltage: Follows input (MOSFET on)

Maximum continuous current: 500mA

Peak current capability: 1.5A (short time)

On-resistance (RDS(ON)): 0.6Ω (typical, @VIN=12V)

Switching time: Rise time (tr) ≈100ns, Fall time (tf) ≈50ns

Quiescent current: <1μA (off state)

Description

This micro−integrated part provides a single component solution to switch inductive loads such as relays, solenoids, and small DC motors without the need of a free−wheeling diode. It accepts logic level inputs, thus allowing it to be driven by a large variety of devices including logic gates, inverters, and microcontrollers.

Features

• Provides Robust Interface between D.C. Relay Coils and Sensitive Logic

• Capable of Driving Relay Coils Rated up to 150 mA at 12 V, 24 V or 48 V

• Replaces 3 or 4 Discrete Components for Lower Cost

• Internal Zener Eliminates Need for Free−Wheeling Diode

• Meets Load Dump and other Automotive Specs

• SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q101 Qualified and PPAP Capable

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

Applications

• Automotive and Industrial Environment

• Drives Window, Latch, Door, and Antenna Relays

Benefits

• Reduced PCB Space

• Standardized Driver for Wide Range of Relays

• Simplifies Circuit Design and PCB Layout

• Compliance with Automotive Specifications

Pin definition (SOT-23-3L package)

Typical application circuit

   1. Relay/inductive load drive

                                   +12V

                                      │

                                      ├───── IN (NUD3160LT1G)

                                      │

                                   ════（继电器线圈）

                                      │

         GND ────────┴───── GND

   2. Protection mechanism:

       - Built-in reverse freewheeling diode to prevent reverse voltage shock when the relay is turned off.

   3. LED drive (PWM dimming)

               MCU PWM ─── IN (NUD3160LT1G) ─── LED+ 

                                                                                │

                                                                              GND

   4. Advantages:

       - Safer than ordinary MOSFET (integrated protection).

Design considerations

   1. PCB layout recommendations:

       - Keep input/output traces as short as possible to reduce parasitic inductance.

       - When using high current, the GND pin needs to be well grounded (copper plating is recommended).

   2. Thermal management:

        - When working with high current (>500mA) for a long time, heat dissipation needs to be considered (such as increasing the copper foil area).

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