ISL62881CHRTZ Просмотр технического описания (PDF) - Intersil

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Компоненты Описание

производитель

ISL62881CHRTZ

Single-Phase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

Intersil 

ISL62881C, ISL62881D

TABLE 1. VID TABLE (Continued)

VO

VID6 VID5 VID4 VID3 VID2 VID1 VID0 (V)

1

0

0

0

0

1

1 0.6625

1

0

0

0

1

0

0 0.6500

1

0

0

0

1

0

1 0.6375

1

0

0

0

1

1

0 0.6250

1

0

0

0

1

1

1 0.6125

1

0

0

1

0

0

0 0.6000

1

0

0

1

0

0

1 0.5875

1

0

0

1

0

1

0 0.5750

1

0

0

1

0

1

1 0.5625

1

0

0

1

1

0

0 0.5500

1

0

0

1

1

0

1 0.5375

1

0

0

1

1

1

0 0.5250

1

0

0

1

1

1

1 0.5125

1

0

1

0

0

0

0 0.5000

1

0

1

0

0

0

1 0.4875

1

0

1

0

0

1

0 0.4750

1

0

1

0

0

1

1 0.4625

1

0

1

0

1

0

0 0.4500

1

0

1

0

1

0

1 0.4375

1

0

1

0

1

1

0 0.4250

1

0

1

0

1

1

1 0.4125

1

0

1

1

0

0

0 0.4000

1

0

1

1

0

0

1 0.3875

1

0

1

1

0

1

0 0.3750

1

0

1

1

0

1

1 0.3625

1

0

1

1

1

0

0 0.3500

1

0

1

1

1

0

1 0.3375

1

0

1

1

1

1

0 0.3250

1

0

1

1

1

1

1 0.3125

1

1

0

0

0

0

0 0.3000

1

1

0

0

0

0

1 0.2875

1

1

0

0

0

1

0 0.2750

1

1

0

0

0

1

1 0.2625

1

1

0

0

1

0

0 0.2500

1

1

0

0

1

0

1 0.2375

1

1

0

0

1

1

0 0.2250

1

1

0

0

1

1

1 0.2125

1

1

0

1

0

0

0 0.2000

1

1

0

1

0

0

1 0.1875

1

1

0

1

0

1

0 0.1750

TABLE 1. VID TABLE (Continued)

VO

VID6 VID5 VID4 VID3 VID2 VID1 VID0 (V)

1

1

0

1

0

1

1 0.1625

1

1

0

1

1

0

0 0.1500

1

1

0

1

1

0

1 0.1375

1

1

0

1

1

1

0 0.1250

1

1

0

1

1

1

1 0.1125

1

1

1

0

0

0

0 0.1000

1

1

1

0

0

0

1 0.0875

1

1

1

0

0

1

0 0.0750

1

1

1

0

0

1

1 0.0625

1

1

1

0

1

0

0 0.0500

1

1

1

0

1

0

1 0.0375

1

1

1

0

1

1

0 0.0250

1

1

1

0

1

1

1 0.0125

1

1

1

1

0

0

0 0.0000

1

1

1

1

0

0

1 0.0000

1

1

1

1

0

1

0 0.0000

1

1

1

1

0

1

1 0.0000

1

1

1

1

1

0

0 0.0000

1

1

1

1

1

0

1 0.0000

1

1

1

1

1

1

0 0.0000

1

1

1

1

1

1

1 0.0000

RDROOP

FB

VDROOP

IDROOP

VCCSENSE

VR LOCAL VO

“CATCH”

RESISTOR

COMP

E/A

Σ

DAC

VDAC

INTERNAL TO IC

X1

VIDS

RTN

VSS

VID<0:6>

VSSSENSE

“CATCH”

RESISTOR

FIGURE 12. DIFFERENTIAL SENSING AND LOAD LINE

IMPLEMENTATION

As the load current increases from zero, the output

voltage will droop from the VID table value by an amount

proportional to the load current to achieve the load line.

The ISL62881C can sense the inductor current through

the intrinsic DC Resistance (DCR) resistance of the

inductors as shown in Figure 1 on page 9 or through

resistors in series with the inductors as shown in Figure 2

on page 10. In both methods, capacitor Cn voltage

represents the inductor total currents. A droop amplifier

converts Cn voltage into an internal current source with

15

FN7596.0

March 8, 2010

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