ISL6334A datasheet(9/30 Pages) INTERSIL

Part #	ISL6334A

Description	VR11.1, 4-Phase PWM Controller with Light Load Efficiency Enhancement and Load Current Monitoring

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Manufacturer	INTERSIL [Intersil Corporation]

Direct Link	http://www.intersil.com/cda/home

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9

FN6482.0

February 26, 2008

Max DAC Source Current

3.5

-

mA

Max DAC Sink Current

100

-

µA

Max REF Source/Sink Current

(Note 4)

50

-

µA

PIN-ADJUSTABLE OFFSET

Voltage at OFS Pin

Offset resistor connected to ground

390

400

415

mV

Voltage below VCC, offset resistor connected to

VCC

1.574

1.60

1.635

V

OSCILLATORS

Accuracy of Switching Frequency Setting

RT = 100kΩ

225

250

275

kHz

Adjustment Range of Switching Frequency

(Note 4)

0.08

-

1.0

MHz

Soft-start Ramp Rate

RSS = 100kΩ (Notes 4, 5, 6)

-

1.563

-

mV/µs

Adjustment Range of Soft-Start Ramp Rate

(Note 4)

0.625

-

6.25

mV/µs

PWM GENERATOR

Sawtooth Amplitude

(Note 4)

-

1.5

-

V

ERROR AMPLIFIER

Open-Loop Gain

RL = 10kΩ to ground (Note 4)

-

96

-

dB

Open-Loop Bandwidth

(Note 4)

-

80

-

MHz

Slew Rate

(Note 4)

-

25

-

V/µs

Maximum Output Voltage

3.8

4.4

4.9

V

Output High Voltage @ 2mA

3.6

-

V

Output Low Voltage @ 2mA

--

1.6

V

REMOTE-SENSE AMPLIFIER (Note 4)

Bandwidth

(Note 4)

-

20

-

MHz

Output High Current

VSEN - RGND = 2.5V

-500

-

500

µA

Output High Current

VSEN - RGND = 0.6

-500

-

500

µA

PWM OUTPUT

Sink Impedance

PWM = Low with 1mA Load

100

220

300

Ω

Source Impedance

PWM = High, Forced to 3.7V

200

320

400

Ω

PSI# INPUT

High Signal Threshold

--

0.8

V

Low Signal Threshold

0.4

-

V

CURRENT SENSE AND OVERCURRENT PROTECTION

Sensed Current Tolerance

ISEN1 = ISEN2 = ISEN3 = ISEN4 = 40µA;

CS Offset and Mirror Error Included, RISENx = 200Ω

36.5

-

42

µA

ISEN1 = ISEN2 = ISEN3 = ISEN4 = 80µA;

CS Offset and Mirror Error Included, RISENx = 200Ω

74

-

83

µA

Overcurrent Trip Level for Average Current At Normal

CCM PWM Mode

CS Offset and Mirror Error Included, RISENx = 200Ω

96

105

117

µA

Overcurrent Trip Level for Average Current at PSI#

Mode

N = 4, Drop to 1 Phase

-

121

-

µA

Peak Current Limit for Individual Channel

115

129

146

µA

IMON Clamped and OCP Trip Level

1.085

1.11

1.14

V

Electrical Specifications

Operating Conditions: VCC = 5V, Unless Otherwise Specified. (Continued)

PARAMETER

TEST CONDITIONS

MIN

(Note 7)

TYP

MAX

(Note 7)

UNITS

ISL6334, ISL6334A

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