NCP4206 datasheet(6/32 Pages) ONSEMI

Part #	NCP4206

Description	Digital Programmable Multi-Phase Synchronous Buck Converter

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NCP4206

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ELECTRICAL CHARACTERISTICS

VIN = (5.0 V) FBRTN − GND, for typical values TA = 25°C, for min/max values TA = 0°C to 85°C; unless otherwise noted. (Notes 6 and 8)

Parameter

Unit

Max

Typ

Min

Symbol

Test Conditions

ERROR AMPLIFIER

Offset Accuracy

VR Offset Register = 111111, VID = 1.0 V

VR Offset Register = 011111, VID = 1.0 V

−193.75

193.75

mV

FBRTN Current

IFBRTN

70

200

mA

Output Current

FB forced to VOUT −3%

ICOMP

500

mA

Gain Bandwidth Product

COMP = FB

GBW(ERR)

20

MHz

Slew Rate

COMP = FB

25

V/ms

BOOT Voltage Hold Time

Internal Timer

tBOOT

2.0

ms

VID INPUTS

Input Low Voltage

Input High Voltage

VID(X)

VIL(VID)

VIH(VID)

0.8

0.3

V

Input Current

IIN(VID)

−5.0

mA

VID Transition Delay Time

VID code change to FB change

400

ns

No CPU Detection Turn−Off Delay

Time

VID code change to PWM going low

5.0

ms

OSCILLATOR

Frequency Range

fOSC

0.25

9.0

MHz

Frequency Variation

TA = 25°C, RT = 500 kW, 4−phase

TA = 25°C, RT = 250 kW, 4−phase

TA = 25°C, RT = 121 kW, 4−phase

fPHASE

170

195

375

750

225

kHz

Output Voltage

RT = 500 kW to GND

VRT

1.9

2.0

2.1

V

RAMPADJ Output Voltage

RAMPADJ − FB, VFB = 1.0 V,

IRAMPADJ = −150 mA

VRAMPADJ

−50

+50

mV

RAMPADJ Input Current Range

IRAMPADJ

5.0

125

mA

CURRENT SENSE AMPLIFIER

Offset Voltage

CSSUM − CSREF (Note 9)

VOS(CSA)

−1.0

+1.0

mV

Input Bias Current, CSREF

CSREF = 1.0 V

IBIAS(CSREF)

−20

+20

mA

Input Bias Current, CSSUM

CSREF = 1.0 V

IBIAS(CSSUM)

−10

+10

nA

Gain Bandwidth Product

CSSUM = CSCOMP

GBW(CSA)

10

MHz

Slew Rate

CCSCOMP = 10 pF

10

V/ms

Input Common−Mode Range

CSSUM and CSREF

0

3.0

V

Output Voltage Range

0.05

3.0

V

Output Current

ICSCOMP

500

mA

Current Limit Latchoff Delay Time

Internal Timer

8.0

ms

PSI

Input Low Voltage

Input High Voltage

0.8

0.3

V

Input Current

−5.0

mA

Assertion Timing

Fsw = 300kHz

3.3

ms

De−assertion Timing

Fsw = 300kHz

825

ns

6. Refer to Absolute Maximum Ratings and Application Information for Safe Operating Area.

7. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at TJ = TA = 25_C. Low

duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.

8. Refer to Application Information Note.

9. Values based on design and/or characterization.

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