ISL6420A Simplified a high -performance control and protection solution DC/DC antihypertensive converter. It is designed to drive the MOSFETISL6420A integrated control, output adjustment, and monitoring and protection function integration into a package in a package. In addition, the integrated circuit has an external reference voltage tracking mode for external reference BUCK converter applications and DDR terminal power supply, as well as the application mode of the DC/DC converter system test mode of voltage ritual.

ISL6420A provides a simple SLR feed circuit, which has a voltage mode control with fast transient response. The output voltage of this converter can accurately adjust to as low as 0.6V, and the maximum tolerance exceeds ± 1.0%temperature and wire voltage changes. The operating frequency is from 100kHz to 1.4 MMS. High -frequency operation provides cost and space savings. The error amplifier has a 15MHz gain bandwidth product and the 6V/microsecond conversion rate, which can achieve the bandwidth of the rapid transient response of the high converter. The pulse width adjustment ratio is under instantaneous conditions, ranging from 0%to 100%. Select the capacitance value from ENSS pin to grounding to set up to the adjustable pulse wide adjustment soft start. Disable the controller for the ENSS. The ISL6420A monitor the output voltage and generates a soft start order to complete, and the output is within the specified range. The built -in overvoltage protection circuit prevents the output voltage from 115%of the setting value. Protecting RDS (on) of the upper MOSFET (on) to inhibit PWM operations is appropriate. This method simplifies the implementation of the efficiency sensor by eliminating the demand for current.

Features

Input from 4.5V to 28V

Excellent output voltage adjustment-0.6V internal reference voltage-line and temperature ± 1.0%reference accuracy

The frequency of the resistance selection switch-100kHz to 1.4MHz

Voltage Maharity and external reference tracking

Output can be a exchange current or source current

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Drive n-channel MOSFET

Simple single circuit control design -Pwm control

Quick transient response-high bandwidth error amplifier-full 0%to 100%working cycle

Wide circuit protection function-PGOOD, overvoltage, overcurrent, stopping the phone

The diode simulation of the pre-defined pressure load

Application

Provides 20 LD QFN and QSOP package

QFN (4x4) Packaging-QFN conforms to JEDEC PUB95 MO-220 QFN-QUAD

Flat-non-lead-product contour-QFN near-chip-level packaging area; improve PCB efficiency, thinner shape

Provide lead-free annealing (in line with ROHS)

个人电脑外设

外部参考Buck转换器

Absolute maximum rated value (Note 1) Hot Information

Bias voltage, vin. +30 volts

Dust -proof and wear out. +36 volts

Static discharge classification

Human model (JESD22-A114). 2000 volts

Charging equipment model (JESD22-C101). 1000 volts

Thermal resistance (typical value) θJa (degrees Celsius/tile) θJC (degrees Celsius/tile)

QFN package (Note 2, 3). 47 8.5

QSOP package (Note 2). 90 mAh

The highest knot temperature (plastic packaging). 150 degrees Celsius

The highest storage temperature range. -65 ° C to 150 ° C

Environmental temperature range. -40 ° C to 85 ° C (indicating I " suffix)

Concluding temperature range. -40 ° C to 125 ° C

Note: The stress listed in the "absolute maximum rated value " may cause permanent damage to the device. This is a stress level and the above conditions described in the operation chapter of this specification or the device under any other conditions.

Note:

1. All voltages are related to grounding.

2. θja is measured in free air