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Exploring GS-R405S Datasheet, Features, and Applications

Feb02
Browse: 399
The GS-R405S by STMicroelectronics is a powerful voltage regulator designed for devices that need stable power. It changes a wide range of input voltages into a steady 5.1V output, useful for many tech applications. This regulator is packed with features that help it run smoothly and protect it from damage, making it a reliable choice for tough environments.

Catalog

1. GS-R405S Overview
2. GS-R405S Features
3. GS-R405S Technical Specifications
4. GS-R405S Alternatives
5. GS-R405S Applications
6. GS-R405S Advantages and Disadvantages
7. Factors to Consider When Buying GS-R405S
8. Manufacturer
9. Conclusion

Exploring GS-R405S Datasheet, Features, and Applications

GS-R405S Overview

The GS-R405S is a high-efficiency step-down (buck) switching voltage regulator module from STMicroelectronics, designed to convert DC input voltages ranging from 9V to 46V into a stable 5.1V DC output with ±2% accuracy. It delivers up to 4A of output current, making it suitable for high-current applications. The module features a soft start function to minimize inrush current during power-up, remote logic inhibit/enable for external control, and remote output voltage sensing to compensate for voltage drops across connections. Protection mechanisms include non-latching overload and short circuit protection, as well as crowbar output overvoltage protection. The integral heatsink enhances power handling capabilities and provides effective shielding to minimize electromagnetic interference (EMI). With a mean time between failures (MTBF) exceeding 200,000 hours, the GS-R405S ensures reliable performance in demanding environments.

For those interested in bulk orders, please contact us to inquire about availability and pricing.

GS-R405S Features

Input Voltage Range: 9V to 46V

Output Voltage: 5.1V

Maximum Output Current: 4A

Efficiency: Approximately 70%

Soft Start Function: Ensures controlled ramp-up of output voltage during startup

Non-Latching Short Circuit Protection: Protects the regulator and connected devices in case of a short circuit

Crowbar Output Overvoltage Protection: Safeguards against excessive output voltage

Remote Logic Inhibit/Enable: Allows external control to enable or disable the regulator

Integral Heatsink: Enhances power handling capability and provides effective EMI shielding

Mean Time Between Failures (MTBF): Exceeds 200,000 hours, indicating high reliability

GS-R405S Technical Specifications

Absolute Maximum Ratings

Symbol
Parameter
Value
Unit
Vi
DC Input Voltage
48
V
Ir*
Reset Output Sink Current
20
mA
Tstg
Storage Temperature Range
-40 to +105
°C
Tcop
Operating Case Temperature Range
-20 to +85
°C

ELECTRICAL CHARACTERISTICS

Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
ΔVo/ΔT
Temperature Stability
Vi = Vo+8V Io = 1A
-
0.2/1.6
-
mV/°C
Io
Output Current
Vi = Vo+8V
0.2
  -
4
A
IoL
Current Limit
Vi = Vo+8V
-
5
8
A
Iisc
Average Input Current
Vi = 46V Output Shorted
-
0.1
0.2
A
fs
Switching Frequency
Io = 1A
-
100
-
KHz
SVR
Supply Voltage Rejection
fo = 100Hz Io = 1A
-
4/12
-
mV/V
Vr
Ripple Voltage
Io = 2A
-
25/150
-
mVpp
tss
Soft Start Time
Vi = Vo+8V
-
10/35
-
ms
VinhL
Low Inhibit Voltage
  -
-
  -
0.8
V
Vinhh
High Inhibit Voltage
  -
2
  -
5.5
V
Iinhh
High Inhibit Input Current
Vinh = 5V
  -
  -
500
µA
tcb
Crow-bar Delay Time
  -
  -
5
-
µs
Vrh*
Reset High Level
  -
  -
5
-
V
Vrl*
Reset Low Level
Irl = 5mA Irl = 10mA
  -
-
0.2
0.04
V
trd*
Reset Delay Time
  -
  -
100
-
ms
Vcth
Crowbar Intervention Threshold
  -
  -
Vo*1.25
-
V
ΔVo
Total Remote Sense Compensation
  -
  -
  -
500
mV
Rth
Thermal Resistance
Case to ambient
  -
5
-
°C/W

GS-R405S Alternatives

- LM2596

- MP2307

GS-R405S Applications

Information Technology Equipment (ITE)

Suitable for commercial applications requiring efficient voltage regulation.

On-Card Regulation

Provides localized voltage regulation directly on circuit boards, ensuring stable power supply to specific components.

Central Power Supply Systems

Can be utilized in centralized power architectures to step down voltage levels for different subsystems.

GS-R405S Advantages and Disadvantages

Advantages

High Efficiency: The GS-R405S offers efficient voltage conversion, minimizing energy loss during operation.

Wide Input Voltage Range: It accommodates a broad input voltage range from 9V to 46V, providing flexibility for various applications.

High Output Current: Capable of delivering up to 4A of output current, it supports power-demanding devices.

Integrated Protection Features: The regulator includes built-in protections such as soft start, remote logic inhibit/enable, remote output voltage sense, non-latching overload and short circuit protection, and crow-bar output overvoltage protection, enhancing system reliability.

Disadvantages

Discontinuation: As the GS-R405S is no longer in production, sourcing this component may be challenging, necessitating the search for suitable replacements.

Fixed Output Voltage: The fixed 5.1V output may limit its applicability in systems requiring adjustable output voltages.

Thermal Management Requirements: Depending on the operating conditions, additional heatsinking or forced ventilation may be required to manage heat dissipation effectively.

Factors to Consider When Buying GS-R405S

Availability: The GS-R405S is no longer produced, making it hard to find. You might find some through resellers or stock leftovers, but they're not easy to come by.

Specifications: This regulator can handle an input voltage from 9V to 46V, providing a stable output of 5.1V with up to 4A. It’s about 70% efficient in converting power.

Features: It includes safety features like soft start, which prevents sudden surges during start-up, and protection against overload and short circuits. It also has a feature to immediately stop power if the voltage goes too high.

Size: Its dimensions are 85.5mm by 67.0mm by 21.3mm, which is fairly compact for the power it offers.

Heat Management: Depending on how much it’s used, you might need extra cooling like a heatsink or a fan to keep it from overheating.

Documentation: Make sure you can get the datasheet and other technical documents to understand how to use it correctly.

Support and Warranty: Support from the manufacturer might be limited because the product is discontinued. Think about this for future maintenance or replacements.

Alternatives: Because this model is hard to find, consider other similar regulators that are still being made to ensure support and availability in the future.

Manufacturer

STMicroelectronics, based in Geneva, Switzerland, is a prominent global semiconductor company specializing in developing advanced microelectronics for diverse applications, including industrial automation, smart devices, and automotive electronics. Renowned for its innovative and energy-efficient solutions, STMicroelectronics offers a broad range of products such as microcontrollers, sensors, and digital integrated circuits. The company emphasizes sustainability and cutting-edge technology in its operations, actively contributing to advancements in IoT, AI, 5G, and electric vehicle technologies, ensuring high performance and reliability across its offerings.

Conclusion

Although the GS-R405S is no longer being made, it remains a solid choice for its efficiency and robust protection features. Those needing a similar regulator should consider current alternatives to ensure they have ongoing support and availability. This regulator sets a high standard for future products in power management.

Frequently Asked Questions [FAQ]

1. What size is the GS-R405S?

The GS-R405S is 85.5mm long, 67.0mm wide, and 21.3mm high, compact enough for its power output.

2. Can GS-R405S be use in battery-powered devices?

Yes, the GS-R405S works well in battery-powered devices as long as the battery voltage is between 9V and 46V.

3. Can the GS-R405S be synchronized with other regulators?

No, the GS-R405S cannot be synchronized. If you need this feature, check other models like the GS-R400VB.

4. What kind of cooling does the GS-R405S need?

It has a built-in heatsink for cooling. For heavy use, you might need more cooling like a fan or extra heatsink.

5. How does the GS-R405S handle thermal management?

The GS-R405S includes an integral heatsink for enhanced thermal management but may require additional cooling solutions depending on the application's power demands and operational environment.

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