ISL6420IA-TK datasheet(7/19 Pages) INTERSIL

Part #	ISL6420IA-TK

Description	Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

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Manufacturer	INTERSIL [Intersil Corporation]

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7

FN9151.4

July 18, 2005

REFERENCE AND SOFT-START/ENABLE

Internal Reference Voltage

VREF

-0.6

-

V

Reference Voltage Accuracy

TA = -40°C to 85°C, VIN = 5.6V to 16V

-1.0

-

+1.0

%

Soft-Start Current

ISS

-10-

µA

Soft-Start Threshold

VSOFT

1.0

-

V

Enable Low (Converter disabled)

--

1.0

V

PWM CONTROLLER GATE DRIVERS

Gate Drive Peak Current

-0.7

-

A

Rise Time

Co = 1000pF

-

20

-

ns

Fall Time

Co = 1000pF

-

20

-

ns

Dead Time Between Drivers

-20-

ns

ERROR AMPLIFIER

DC Gain (Note 7)

Guaranteed by Design

-

88

-

dB

Gain-Bandwidth Product (Note 7)

GBW

-

15

-

MHz

Slew Rate (Note 7)

SR

-

6

-

V/

µs

PROTECTION

OCSET Current Source

IOCSET

Vocset = 4.5V

80

100

120

µA

POWER GOOD AND CONTROL FUNCTIONS

Power-Good Lower Threshold

VPG-

Fraction of the set point; ~3

µs noise filter

-14

-10

-8

%

Power-Good Higher Threshold

VPG+

Fraction of the set point; ~3

µs noise filter

10

-

16

%

PGOOD Leakage Current

IPGLKG

VPULLUP = 5.5V

-

1

µA

PGOOD Voltage Low

IPGOOD = 4mA

-

0.5

V

PGOOD Delay

CDEL = 0.1

µF

-

125

-

ms

CDEL Current for PGOOD

CDEL threshold = 2.5V

-

2

-

µA

CDEL Threshold

-2.5

-

V

EXTERNAL REFERENCE

External Reference Input Range at

GPIO1/REFIN.

VMSET/MODE = H, CREFOUT = 2.2µF

0.6

-

1.25

V

REFERENCE BUFFER

Buffered Output Voltage - Internal Reference

VREFOUT IREFOUT = 20mA,

VMSET/MODE = HIGH,

CREFOUT = 2.2µF, TA = -40°C to 85°C

0.585

0.6V

0.615

V

Buffered Output Voltage - External Reference

VREFOUT VREFIN = 1.25V, IREFOUT = 20mA,

VMSET/MODE = HIGH,

CREFOUT = 2.2µF

Vrefin

-0.01

-Vrefin

+0.01

V

Current Drive Capability

CREFOUT = 2.2µF20

-

mA

Electrical Specifications

Operating Conditions, Unless Otherwise Noted: VIN = 12V, PVCC shorted with VCC5, TA = 25°C (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL6420

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