ADP3194 Просмотр технического описания (PDF) - Analog Devices

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ADP3194

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

Analog Devices 

ADP3194

Parameter

CURRENT LIMIT COMPARATOR

Output Voltage

Normal Mode

Shutdown Mode

Output Current, Normal Mode

Maximum Output Current2

Current Limit Threshold Voltage

Current Limit Setting Ratio

DELAY Normal Mode Voltage

DELAY Overcurrent Threshold

Latch-Off Delay Time

SOFT START

Output Current, Soft Start Mode

Soft Start Delay Time

ENABLE INPUT

Input Low Voltage

Input High Voltage

Input Current

POWER GOOD COMPARATOR

Undervoltage Threshold

Overvoltage Threshold

Output Low Voltage

Power Good Delay Time

During Soft Start

VID Code Changing

VID Code Static

Crowbar Trip Point

Crowbar Reset Point

Crowbar Delay Time

VID Code Changing

VID Code Static

PWM OUTPUTS

Output Low Voltage

Output High Voltage

SUPPLY—ADP3194

VCC

DC Supply Current

UVLO Threshold Voltage

UVLO Hysteresis

Symbol Conditions

Min

VILIMIT(NM) EN > 0.8 V, RILIMIT = 250 kΩ

2.8

VILIMIT(SD) EN < 0.4 V, IILIMIT = –100 μA

IILIMIT(NM) EN > 0.8 V, RILIMIT = 250 kΩ

60

VCL

VCSREF – VCSCOMP, RILIMIT = 250 kΩ

105

VCL/IILIMIT

VDELAY(NM) RDELAY = 250 kΩ

2.8

VDELAY(OC) RDELAY = 250 kΩ

1.6

tDELAY

RDELAY = 250 kΩ, CDELAY = 12 nF

IDELAY(SS)

tDELAY(SS)

During startup, DELAY < 2.8 V

15

RDELAY = 250 kΩ, CDELAY = 12 nF, VID code = 011111

VIL(EN)

VIH(EN)

0.8

IIL(EN)

–1

VPWRGD(UV)

VPWRGD(OV)

VOL(PWRGD)

Relative to nominal DAC output

Relative to nominal DAC output

IPWRGD(SINK) = 4 mA

–180

90

RDELAY = 250 kΩ, CDELAY = 12 nF, VID code = 011111 1

100

VCROWBAR Relative to nominal DAC output

90

Relative to FBRTN

450

tCROWBAR Overvoltage to PWM going low

Blanking time

100

VOL(PWM)

VOH(PWM)

VCC

IPWM(SINK) = –400 μA

IPWM(SOURCE) = +400 μA

VSYSTEM = 12 V, RSHUNT = 300 Ω

VUVLO

VCC rising

4.0

4.75

6.3

1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).

2 Guaranteed by design, not production tested.

3 Relative current matching from each phase to the average of all four phases.

Typ

3

12

125

10.4

3

1.9

15

20

1

–250

150

225

250

200

150

550

250

400

160

5

5

20

7

0.9

Max Unit

3.3 V

400 mV

μA

μA

145 mV

mV/μA

3.3 V

2.2 V

ms

25 μA

ms

0.4 V

V

+1 μA

–300 mV

200 mV

400 mV

ms

μs

ns

200 mV

650 mV

μs

ns

500 mV

V

V

30 mA

8.0 V

V

Rev. 0 | Page 4 of 32

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