NCP5389 datasheet(8/28 Pages) ONSEMI

Part #	NCP5389

Description	2/3 Phase Buck Controller for VR11 Pentium IV Processor Applications

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP5389

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8

ELECTRICAL CHARACTERISTICS

(0°C < TA < 70°C; 0°C < TJ < 85°C; 10.8 V < VCC < 13.2 V; All DAC Codes; CVCC = 0.1 mF, FSW = 400 kHz, unless otherwise stated)

Parameter

Test Conditions

Min

Typ

Max

Units

REMOTE SENSE DIFFERENTIAL AMPLIFIER

VS+ Input Resistance (Note 2)

DRVON = High

DRVON = Low

−

17

0.5

−

kW

VS+ Input Open Circuit Voltage

(Note 2)

DRVON = High

DRVON = Low

−

0.67

0.05

−

V

VS− Input Resistance (Note 2)

VS+ = DAC Voltage

DRVON = High

−

10

−

kW

VS− Input Open Circuit Voltage

(Note 2)

DRVON = High

VS+ = DAC Voltage

= 0.333*DAC

+ 0.433

V

Input Voltage Range

−0.3

−

3.0

V

Input Offset Voltage (Note 2)

−1.0

−

1.0

mV

−3dB Bandwidth (Note 2)

CL = 80 pF to GND,

RL = 10 kW to GND

−

12

−

MHz

DC Gain

IDIFFOUT = 100 mA

0.982

1.0

1.018

V/V

Slew Rate (Note 2)

DVin = 1.0 V,

DVout = 1.0 V to 2.0 V,

CL = 80 pF to GND,

Load = ±125 mA

−

10

−

V/ms

Maximum Output Voltage

ISOURCE = 1.0 mA

3.0

−

V

Minimum Output Voltage

ISINK = 1.0 mA

−

0.5

V

Output Source Current (Note 2)

Vout = 2.1 V

−

25

−

mA

Output Sink Current (Note 2)

Vout = 1.0 V

−

1.4

−

mA

VDRP ADAPTIVE VOLTAGE POSITIONING AMPLIFIER

Current Sense Input to VDRP Gain

−60 mV < (CSx−CSxN)

< +60 mV, TA = 25°C

5.7

6.0

6.3

V/V

Current Sense Input to VDRP Output

−3dB Bandwidth (Note 2)

CL = 330 pF to GND,

RL = 10 kW to GND

−

7.2

−

MHz

Current Sense Input to VDRP Output

Slew Rate (Note 2)

DV(CSx−CSxN) = 25 mV (all

phases), 1.3 V < Vout < 1.9 V,

CL = 330 pF to GND,

Load = ±400 mA

−

3.7

−

V/ms

Current Summing Amp Output Offset

Voltage

CSx – CSxN = 0, CSx =1.0 V

−40

−

+40

mV

Maximum VDRP Output Voltage

CSx − CSxN = 0.12 V

(all phases),

ISOURCE = 1.0 mA

3.02

−

V

Minimum VDRP Output Voltage

CSx − CSxN = −0.12 V

(all phases),

ISINK = 1.0 mA

−

0.5

V

Output Source Current (Note 2)

VDRP = 2.9 V

−

9.0

−

mA

Output Sink Current (Note 2)

VDRP = 1.0 V

−

2.0

−

mA

2. Guaranteed by design. Not tested in production.

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