L7987LTR

Voltage - Input (Max):	61V
Supplier Device Package:	16-HTSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	250kHz ~ 1.5MHz
Current - Output:	2A
Voltage - Output (Max):	61V
Voltage - Output (Min/Fixed):	0.8V
Series:	--
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to L7987LTR

The L7987LTR is an integrated switch-mode DC-DC converter IC fabricated in an advanced Mixed-Mode CMOS process developed by STMicroelectronics. This regulator integrates a 9V/5A switched mode power supply (SMPS) and three voltage stabilizers in a single device. It provides high efficiency and low EMI performance, making it an ideal regulator for mobile and automotive applications. The L7987LTR is designed for applications requiring a low output voltage range and includes PWM control and soft start for improved output regulation. As a regulator, it offers many advantages including low output impedance, fast transient response, excellent load regulation and low standby power losses.

L7987LTR Application Fields

The L7987LTR is suitable for use in DC-DC converter and voltage regulator applications. Common applications include mobile phones, portable electronics, computer peripherals, automotive electronics and network devices. These devices are used in a wide range of equipment including medical monitoring systems, aerospace and military equipment. The L7987LTR is an ideal solution for these applications due to its low output voltage range, excellent load regulation and low standby power losses.

L7987LTR Working Principle

The L7987LTR is a DC-DC converter IC with integrated switching power supply and voltage regulation. The two main components of the L7987LTR are the switching power supply and the voltage regulator. The switching power supply works on the principle of Pulse Width Modulation (PWM) to convert a DC input voltage into a regulated DC output voltage. The voltage regulator works to limit the output voltage and current to set values based on the specs defined in the device datasheet.The PWM signal can be generated by an external circuit or by the L7987LTRs integrated circuit. The voltage regulator is typically a three-stage system with an input voltage, a reference voltage and an output voltage. The reference voltage is the value which the output voltage is regulated to. The reference voltage is adjustable, allowing for adjustability of the output voltage from the device. The output voltage is monitored via a feedback loop and the internal error amplifier ensures that the output voltage remains stable and does not drift with load or temperature changes.The L7987LTR also has several protection circuits which are used to detect and prevent any over/under voltage and current conditions from occurring. These protection circuits also improve the dynamic response of the device in transient conditions.

Conclusion

The L7987LTR is an integrated switch-mode DC-DC converter IC that integrates a 9V/5A switched mode power supply (SMPS) and three voltage stabilizers in a single device. This makes it an ideal regulator for mobile and automotive applications. The L7987LTR is suitable for use in DC-DC converter and voltage regulator applications including mobile phones, portable electronics, computer peripherals, automotive electronics and network devices. The device works on the principle of Pulse Width Modulation (PWM) and utilises a three-stage system for voltage regulation, making it capable of a wide range of output voltage settings. In addition to its low output voltage range, excellent load regulation and low standby power loss, the L7987LTR also provides protection circuits for over/under conditions.

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