ADP3168JRU-REEL7 datasheet(3/24 Pages) AD

Part #	ADP3168JRU-REEL7

Description	6-Bit, Programmable 2-, 3-, 4-Phase Synchronous Buck Controller

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ADP3168

Rev. B | Page 3 of 24

SPECIFICATIONS

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). VCC = 12 V,

FBRTN = GND, TA = 0°C to 85°C, unless otherwise noted.

Table 1.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

ERROR AMPLIFIER

Output Voltage Range

VCOMP

0.5

3.5

V

Accuracy

VFB

Relative to nominal DAC output,

−10

+10

mV

Referenced to FBRTN,

CSSUM = CSCOMP; see Figure 10

Line Regulation

∆VFB

VCC = 10 V to 14 V

0.05

%

Input Bias Current

IFB

14

15.5

17

µA

FBRTN Current

IFBRTN

90

120

µA

Output Current

IO(ERR)

FB forced to VOUT − 3%

500

µA

Gain Bandwidth Product

GBW(ERR)

COMP = FB

20

MHz

Slew Rate

CCOMP = 10 pF

25

V/µs

VID INPUTS

Input Low Voltage

VIL(VID)

0.4

V

Input High Voltage

VIH(VID)

0.8

V

Input Current, Input Voltage Low

IIL(VID)

VID(X) = 0 V

−20

−30

µA

Input Current, Input Voltage High

IIH(VID)

VID(X) = 1.25 V

15

25

µA

Pull-Up Resistance

RVID

35

60

115

kΩ

Internal Pull-Up Voltage

0.825

1.00

V

VID Transition Delay Time1

VID code change to FB change

400

ns

No CPU Detection Turn-Off

VID code change to 11111 to

400

ns

Delay Time

PWM going low

OSCILLATOR

Frequency Range1

fOSC

0.25

4

MHz

Frequency Variation

fPHASE

TA = 25°C, RT = 250 kΩ, 4-phase

155

200

245

kHz

TA = 25°C, RT = 115 kΩ, 4-phase

400

kHz

TA = 25°C, RT = 75 kΩ, 4-phase

600

kHz

Output Voltage

VRT

RT = 100 kΩ to GND

1.9

2.0

2.1

V

RAMPADJ Output Voltage

VRAMPADJ

RAMPADJ − FB

−50

+50

mV

RAMPADJ Input Current Range

IRAMPADJ

0

100

µA

CURRENT SENSE AMPLIFIER

Offset Voltage

VOS(CSA)

CSSUM − CSREF; see Figure 5

−1.5

+1.5

mV

Input Bias Current

IBIAS(CSA)

−50

+50

nA

Gain Bandwidth Product

GBW(CSA)

10

MHz

Slew Rate

CCSCOMP = 10 pF

10

V/µs

Input Common-Mode Range

CSSUM and CSREF

0

3

V

Positioning Accuracy

∆VFB

See Figure 6

−77

−80

−83

mV

Output Voltage Range

ICSCOMP = ±100 µA

0.05

3.3

V

Output Current

ICSCOMP

500

µA

CURRENT-BALANCE CIRCUIT

Common-Mode Range

VSW(X)CM

−600

+200

mV

Input Resistance

RSW(X)

SW(X) = 0 V

20

30

40

kΩ

Input Current

ISW(X)

SW(X) = 0 V

4

7

10

µA

Input Current Matching

∆ISW(X)

SW(X) = 0 V

−5

+5

%

1 Guaranteed by design, not tested in production.

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