ISL9008IEKZ-T

Current - Output:	150mA
Base Part Number:	ISL9008
Supplier Device Package:	SC-70-5
Package / Case:	5-TSSOP, SC-70-5, SOT-353
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature, Soft Start, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	--
Current - Quiescent (Iq):	65µA
Series:	--
Voltage Dropout (Max):	0.325V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.85V
Voltage - Input (Max):	6.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The ISL9008IEKZ-T is an Advanced PMIC Voltage Regulators – Linear from Intersil. The device is suitable for portable consumer applications, such as digital still cameras, PDA/Smartphones, and digital video cameras, precisely regulating the output voltage of Lithium Ion/Polymer and Li-Ion battery packs. It is one of the most sophisticated voltage regulators with a wide range of features and the ability to be finely tuned to the specific application requirements.

Overview

At the heart of the ISL9008IEKZ-T is an all new 3-2-2 cell, unity-gain topology consisting of an Low Dropout Regulator (LDO), an inverter, and two series controllers, all in one package - a tiny MCU (microcontroller unit) with a mere 5mm x 8mm footprint. This design is the industry’s lowest voltage, highest current and highest transient response, allowing for higher system efficiency and faster time-to-market.The design of the MCU offers a wide range of product features and performance characteristics that are required for both cost- effective and advanced control functions. These include programmable output voltage up to 500mV, 16-bit programmable resolution, PWM/PFM control, transient response setting and other additions due to the complexity of the output voltage regulation itself.The device also incorporates a number of protection features, such as over voltage, under voltage, overload and reverse current protection.

Comparison with Other PMICs

The ISL9008IEKZ-T is comparable with other PMIC voltage regulators which include the ISL9009LTK and ISL9018KZ. These typically include 3-2-2 cell designs, unity-gain topologies, and low drop out regulators. While the ISL9009LTK provides a maximum output voltage of 2V, the ISL9018KZ has a maximum output voltage of 2.5V. The ISL9008IEKZ-T outperforms both of these in terms of minimum output voltage, as it provides 0.5V compared to the 1V of the other two.The ISL9008IEKZ-T also offers superior transient response, a 16-bit programmable output resolution, and other features due to the increased complexity of the device. It also offers higher system efficiency and a faster time-to-market.

Features and Benefits

The ISL9008IEKZ-T PMIC voltage regulator offers a wide range of features and benefits for portable consumer applications, such as digital still cameras, PDA/Smartphones, and digital video cameras. These include:

• Wide operating temperature range from -40°C to +85°C.
• 16-bit adjustable voltage resolution.
• PWM/PFM control for improved efficiency.
• Transient response setting for dynamic voltage adjustment.
• Integrated over voltage, under voltage, out of range, and reverse current protection.
• Ultra-low quiescent current.
• Voltage accuracy: ±2%.
• Low quiescent current.
• Nano-second transient response.
• Fast reverse discharge protection.
• Temperature protection.

Application Field and Working Principle

The ISL9008IEKZ-T PMIC voltage regulator is designed to be used in portable consumer applications that require accurate output voltage regulation. Such applications would include portable digital devices such as digital still cameras, PDA/Smartphones, and digital video cameras.The ISL9008IEKZ-T works by using an all new 3-2-2 cell, unity-gain topology consisting of a Low Dropout Regulator (LDO), an inverter, and two series controllers, all in one package. This reduces the number of components required to regulate the output voltage, allowing for higher system efficiency and a faster time-to-market.The voltage regulator is powered from a single 3.6V to 24V input. The input voltage is then filtered and regulated using the LDO and the series controllers. The inverter then steps down the voltage level and provides a precision output voltage of up to 500mV. The output voltage is adjusted and controlled by the 16-bit adjustable resolution.The device also features PWM/PFM control for improved efficiency, and a dedicated transient response setting for dynamic voltage adjustment. Furthermore, it is protected against over voltage, under voltage, overload and reverse current conditions, ensuring reliable operation and long life.

Conclusion

The ISL9008IEKZ-T PMIC voltage regulator is the ideal solution for portable consumer applications that require precise output voltage regulation such as digital still cameras, PDA/Smartphones, and digital video cameras. The device is small and compact, yet offers advanced features and performance for cost-effective control functions.

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