ADP3171 データシートの表示（PDF） - Analog Devices

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ADP3171

Synchronous Buck Controller with Dual Linear Regulator Controllers

Analog Devices 

ADP3171–SPECIFICATIONS1

(VCC = 12 V, TA = 0؇C to 70؇C, unless otherwise noted.)

Parameter

Symbol Conditions

FEEDBACK INPUT

Output Accuracy

Line Regulation

Crowbar Trip Point

Crowbar Reset Point

Crowbar Response Time

OSCILLATOR

Off Time

CT Charge Current

ERROR AMPLIFIER

Output Resistance

Transconductance

Output Current

Maximum Output Voltage

Output Disable Threshold

–3 dB Bandwidth

CURRENT SENSE

Threshold Voltage

Input Bias Current

Response Time

VFB

∆VOUT

VCROWBAR

tCROWBAR

Figure 1

VCC = 10 V to 14 V

% of Nominal FB Voltage

% of Nominal FB Voltage

Overvoltage to DRVL Going High

TA = 25°C, CT = 200 pF

ICT

TA = 25°C, VOUT in Regulation

TA = 25°C, VOUT = 0 V

RO(ERR)

gm(ERR)

IO(ERR)

VCOMP(MAX)

VCOMP(OFF)

BWERR

FB Forced to VOUT – 3%

FB Forced to VOUT – 3%

COMP = Open

VCS(TH)

ICS+, ICS–

tCS

FB Forced to VOUT – 3%

FB ≤ 0.45 V

0.8 V ≤ COMP ≤ 1 V

CS+ = CS– = VOUT

CS+ – (CS–) > 87 mV

to DRVH Going Low

OUTPUT DRIVERS

Output Resistance

Output Transition Time

LINEAR REGULATORS

Feedback Current

LR1 Feedback Voltage

LR2 Feedback Voltage

Driver Output Voltage

RO(DRV(X))

tR, tF

IL = 50 mA

CL = 3000 pF

ILRFB(X)

VLRFB(1)

VLRFB(2)

VLRDRV(X)

Figure 2, VCC = 4.5 V to 12.6 V

Figure 2, VCC = 4.5 V to 12.6 V

VCC = 4.5 V, VLRFB(X) = 0 V

POWER GOOD COMPARATOR

Undervoltage Threshold

Undervoltage Hysteresis

Overvoltage Threshold

Overvoltage Reset Point

Output Voltage Low

Response Time

VPWRGD(UV)

VPWRGD(OV)

VOL(PWRGD)

% of Nominal FB Voltage

% of Nominal FB Voltage

% of Nominal FB Voltage

% of Nominal FB Voltage

IPWRGD(SINK) = 1 mA

SUPPLY

DC Supply Current2

UVLO Threshold Voltage

UVLO Hysteresis

ICC

VUVLO

NOTES

1All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC).

2Dynamic supply current is higher due to the gate charge being delivered to the external MOSFETs.

Specifications subject to change without notice.

Min Typ Max

1.188 1.2

0.06

115 120

40 50

400

1.212

125

60

3.5 4 4.5

130 150 170

25 35 45

130

2.05 2.2 2.35

625

3.0

600 750 900

500

69 78 87

35 45 54

15

0.5 5

50

6

80

0.3 1

1.45 1.5 1.55

1.75 1.8 1.85

4.2

75 80 85

5

115 120 125

40 50 60

250 500

250

79

6.75 7 7.25

0.8 1 1.2

Unit

V

%

%

%

ns

µs

µA

µA

kΩ

mmho

µA

V

mV

kHz

mV

mV

mV

µA

ns

Ω

ns

µA

V

V

V

%

%

%

%

mV

ns

mA

V

V

–2–

REV. 0

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