TL3842P

Frequency - Switching:	Up to 500kHz
Base Part Number:	TL3842
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	97%
Series:	--
Voltage - Supply (Vcc/Vdd):	10 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

TL3842P is a low-noise, low-dropout, high-speed, two-phase step-down switching controller specifically designed to meet the demanding requirements of the portable and telecom power management market segments. It is part of a family of integrated voltage regulator circuits that are suitable for use in low-noise, low-standby current, DC/DC switch-mode power conversion applications. The TL3842P is a specific type of PMIC (Power Management Integrated Circuit) which belongs to the category of Voltage Regulator/DC DC Switching Controllers. In this article, we will talk about TL3842P application field and working principle.

TL3842P application fields

The TL3842P is a wide input range high-performance switch-mode controller which is suitable for use in mobile and stationary power supplies, computer systems and other applications that require high performance voltage regulation. It is designed to provide efficient regulation for 3.3V to 24V input range and HIGH VIN to LOW VIN precision voltage regulation for battery-powered or adverse-input conditions. It has an integrated PWM generator, voltage-mode control and current-mode feedback circuits, as well as an under-voltage lockout, over-voltage protection, and short-circuit protection features. It is ideally suited for use in point-of-load and distributed power applications, such as cellular telephone power supplies, laptop and desktop computers, handheld instrumentation, and other low-noise, low-dropout, and low-cost applications.

TL3842P working principle

TL3842P uses a two-phase Pulse Width Modulation (PWM) architecture to control the output voltage. It is designed to provide fast and accurate voltage regulation with low voltage overshoots. It has two Pulse Width Modulation (PWM) generators, one for each phase and each receives an adjustable reference voltage that is used to control the output voltage. The two-phase architecture ensures low voltage ripple and allows the output voltage to remain constant even in the presence of load transients.The two-phase architecture also offers an integrated Soft-Start feature which allows a gradual increase in output voltage to prevent large initial start-up spikes and a fast transient response time that helps minimize current ripple. It also offers dynamic power-saving features such as a programmable soft-stop for load-transient protection, to ensure that the system does not overshoot the voltage.The TL3842P has a LOW VIN to HIGH VIN switch for maximum versatility. It can regulate output voltages ranging from 0.625V to 6.0V with high input voltage range from 4.5V to 24V.

Conclusion

The TL3842P is an integrated switching controller designed to meet the demanding requirements of the portable and telecom power management market segments. The TL3842P is part of the family of integrated voltage regulator circuits that are suitable for use in low-noise, low-standby current, DC/DC switch-mode power conversion applications. It uses a two-phase Pulse Width Modulation (PWM) architecture to control the output voltage and offers an integrated Soft-Start feature which allows a gradual increase in output voltage. In addition, it has a LOW VIN to HIGH VIN switch for maximum versatility and can regulate output voltages ranging from 0.625V to 6.0V with high input voltage range from 4.5V to 24V.

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