S-19252E18H-A4T7U4

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The S-19252E18H-A4T7U4 is an automotive linear voltage regulator from ABLIC Inc. It provides a fixed 1.8 V output with ±3.0% accuracy across the operating temperature range of −40°C to +105°C. The device accepts input voltages between 1.5 V and 5.5 V and supports up to 150 mA output current. Key specifications include a typical dropout voltage of 70 mV at 100 mA, ripple rejection of 80 dB typ., and low current consumption of 36 μA during operation. It features a built-in soft-start function with a fixed time of 1.0 ms typ., overcurrent protection, and an ON/OFF control pin.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Incorporates a soft-start circuit that controls the output voltage rise time immediately after power-on or activation of the ON/OFF pin.
• Includes a built-in overcurrent protection circuit designed to limit excessive current flow through the output transistor.
• Features an ON/OFF control mechanism that allows for discharge shunt functionality to extend battery life in vehicle applications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive meter systems
• Car body electronics
• Headlight control circuits
• Intelligent Transportation Systems (ITS)
• Car navigation and audio systems

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix A4T7U4 corresponds to the HSNT-4(1010)B package and tape reel configuration before procurement. Confirm that the E-type designation aligns with the required 1.0 ms soft-start timing and available pull-down resistor functions. Ensure compliance with AEC-Q100 Grade 2 requirements for the target automotive environment.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 1.8 V rail is required for automotive loads within the 1.5 V to 5.5 V input range. The HSNT-4(1010)B package is suitable for high-density mounting scenarios where space is constrained. Consider the 1.0 ms soft-start characteristic to manage inrush currents appropriately during system initialization.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the S-19252 Series of positive voltage regulators developed using CMOS process technology. The series offers various output voltages selectable in 0.05 V steps and multiple package options including SOT-23-5, SC-82AB, and HSNT-4(1010)B. The E-type specifically designates the HSNT-4(1010)B package variant with a fixed 1.0 ms soft-start time and active pull-down resistor.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes within the same series include other E-type variants such as S-19252E12H-A4T7U4 or S-19252E25H-A4T7U4 if different output voltages are needed. For packages with switchable soft-start times, J, K, L, or M types in SOT-23-5 may be considered, though pinout and functional differences exist.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the soft-start time for the S-19252E18H-A4T7U4?

The soft-start time is fixed at 1.0 ms typ. for the E-type product.

Does this IC support ceramic capacitors for input and output?

Yes, both input and output capacitors can be ceramic capacitors of 1.0 μF or more.

Is the discharge shunt function available on this model?

Yes, the E-type includes the discharge shunt function which is available.