LX8587-00CDD

Current - Output:	3A
Base Part Number:	LX8587
Supplier Device Package:	TO-263, Power
Package / Case:	TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	83dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.3V @ 3A
Voltage - Output (Max):	3.6V
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	10V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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PMIC - Voltage Regulators - Linear - LX8587-00CDD Application Field and Working Principle

The LX8587-00CDD is a TO-220 regulated step-down low-noise and low-profile DC/DC converter with synchronous rectification. Its main features include an adjustable output voltage range of 0.8 V to 5 V, an ultra-low quiescent current of 6 mA, a maximum industrial input voltage range of 6 V to 36 V, and an included automatic voltage positioning (AVP) feature. The device also has an adjustable operating frequency range of 150 KHz to 500 KHz and a load regulation of ±2 %, allowing users to achieve their desired output voltage accuracy. LX8587-00CDD has a high-efficiency 5A 70mΩ synchronous rectifier, which greatly reduces the power dissipation of the cooling system. It also has a 560kHz maximum switching frequency and many advanced protection functions such as input Under-voltage protection, over-voltage protection, SFB and OVP/OTP. This article will discuss the application field and working principle of the LX8587-00CDD.

Application field of LX8587-00CDD

Realizing various output voltage with high accuracy is the biggest advantage of the LX8587-00CDD. In industrial applications, LX8587-00CDD can provide stable and reliable outputs for various components, such as microcontrollers, DDR memory, FPGA and ASIC. Specifically, its applications include automotive, consumer electronics, and industrial control systems including PCs, routers, set-top boxes, printers, other Internet of Things (IoT) devices, white goods, and medical devices.

Working principle of LX8587-00CDD

The LX8587-00CDD is a switching regulator, which means it works by switching between conducting and non-conducting states at a very high frequency to adjust the output voltage. It has two stages of control, including an outer voltage loop and an inner current loop. The voltage loop is used to detect the change in output voltage and adjusts the input voltage accordingly. The current loop is used to detect the current flowing through the inductor and, when it reaches its preset value, the IC switches off the transistor. The switching operation is controlled by a PWM signal, which is generated by a high-speed oscillator. The LX8587-00CDD features a synchronous rectification scheme, which means that, instead of relying on a diode to recover the stored energy in the inductor, a PMOS is used. This reduces the overall heating of the device and improves efficiency. Additionally, the device also includes an Automatic Voltage Positioning (AVP) feature that adapts to different load types by providing a fine-tuned output voltage, which keeps voltage at the desired level even when the load varies gradually. The device also includes several protection features like under-voltage input protection (UVP), output over-voltage protection (OVP), and output soft-start protection (SSP) to ensure the safety of the device from external electric shock and over-currents.The LX8587-00CDD is an ultra-low quiescent current synchronous buck converter that is designed to deliver high efficiency, superior load regulation, and fast transient response. It provides a wide input voltage range of 6 V to 36 V and an adjustable output voltage range of 0.8 V to 5 V. The device features an adjustable operating frequency range of 150 KHz to 500 KHz, a load regulation of ±2 %, and an included AVP feature, enabling users to achieve their desired output voltage accuracy while keeping power dissipation to a minimum. Furthermore, its advanced protection features protect the device against a range of hazards and its versatility make it suitable for a wide range of applications.

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