ADP3197 datasheet(3/32 Pages) AD

Nome de Peças	ADP3197

Descrição Electrónicos	6-Bit Programmable 2-/3-Phase Synchronous Buck Controller

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ADP3197

Rev. 0 | Page 3 of 32

SPECIFICATIONS

VCC = 5 V, FBRTN = GND, TA = 0°C to 85°C, unless otherwise noted1

Table 1.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

REFERENCE CURRENT

Reference Bias Voltage

VIREF

1.5

V

Reference Bias Current

IIREF

RIREF = 100 kΩ

14.25

15

15.75

μA

ERROR AMPLIFIER

Output Voltage Range2

VCOMP

0.05

4.4

V

Accuracy

VFB

Relative to nominal DAC output, referenced to FBRTN,

LLSET = CSREF (see Figure 4)

−10

10

mV

Load Line Positioning Accuracy

CSREF – LLSET = 80 mV

−78

−80

−82

mV

Differential Nonlinearity

−1

+1

LSB

Input Bias Current

IFB

IFB = 0.5 × IIREF

−9

−7.5

−6

μA

FBRTN Current

IFBRTN

65

200

μA

Output Current

ICOMP

FB forced to VOUT – 3%

500

μA

Gain Bandwidth Product

GBW(ERR)

COMP = FB

20

MHz

Slew Rate

COMP = FB

25

V/μs

LLSET Input Voltage Range

VLLSET

Relative to CSREF

−250

+250

mV

LLSET Input Bias Current

ILLSET

−10

+10

nA

VID INPUTS

Input Low Voltage

VIL(VID)

VIDx, VIDSEL

0.6

V

Input High Voltage

VIH(VID)

VIDx, VIDSEL

1.4

V

Input Current

IIN(VID)

−10

μA

VID Transition Delay Time2

VID code change to FB change

400

ns

OSCILLATOR

Frequency Range2

fOSC

0.25

3

MHz

Frequency Variation

fPHASE

TA = 25°C, RT = 280 kΩ, 3-phase

180

200

220

kHz

TA = 25°C, RT = 130 kΩ, 3-phase

400

kHz

TA = 25°C, RT = 57.6 kΩ, 3-phase

800

kHz

Output Voltage

VRT

RT = 280 kΩ to GND

1.9

2.0

2.1

V

RAMPADJ Output Voltage

VRAMPADJ

RAMPADJ − FB, DAC=1.55 V

−50

+50

mV

RAMPADJ Input Current Range

IRAMPADJ

1

50

μA

CURRENT SENSE AMPLIFIER

Offset Voltage

VOS(CSA)

CSSUM – CSREF (see Figure 5)

−1.0

+1.0

mV

Input Bias Current

IBIAS(CSSUM)

−10

+10

nA

Gain Bandwidth Product

GBW(CSA)

CSSUM = CSCOMP

10

MHz

Slew Rate

CCSCOMP = 10 pF

10

V/μs

Input Common-Mode Range

CSSUM and CSREF

0

3.5

V

Output Voltage Range

0.05

3.5

V

Output Current

ICSCOMP

500

μA

Current Limit Latch-off Delay Time

tOC(DELAY)

CDELAY = 10 nF

8

ms

CURRENT BALANCE AMPLIFIER

Common-Mode Range

VSWxCM

−600

+200

mV

Input Resistance

RSWx

SWx = 0 V

10

17

26

kΩ

Input Current

ISWx

SWx = 0 V

8

12

20

μA

Input Current Matching

ΔI

SWx

SWx = 0 V

−4

+4

%

CURRENT LIMIT COMPARATOR

ILIMIT Bias Current

IILIMIT

IILIMIT = 2/3 × IIREF

9

10

11

μA

ILIMIT Voltage

VILIMIT

RILIMIT = 121 kΩ (VILIMIT = IILIMIT × RILIMIT)

1.09

1.21

1.33

V

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