ADP2323 datasheet(4/32 Pages) AD

Numer części	ADP2323

Szczegółowy opis	Dual 3 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET

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ADP2323

Data Sheet

Rev. A | Page 4 of 32

SPECIFICATIONS

PVIN1 = PVIN2 = 12 V at TJ = −40°C to +125°C, unless otherwise noted.

Table 1.

Parameters

Symbol

Test Conditions/Comments

Min

Typ

Max

Units

POWER INPUT (PVINx PINS)

Power Input Voltage Range

V

PVIN

4.5

20

V

Quiescent Current (PVIN1 + PVIN2)

I

Q

MODE = GND, no switching

3

5

mA

Shutdown Current (PVIN1 + PVIN2)

I

SHDN

EN1 = EN2 = GND

50

100

µA

PVINx Undervoltage Lockout Threshold

UVLO

PVINx Rising

4.3

4.5

V

PVINx Falling

3.5

3.8

V

FEEDBACK (FBx PINS)

FBx Regulation Voltage1

V

FB

PVINx = 4.5 V to 20 V

0.594

0.6

0.606

V

FBx Bias Current

I

FB

0.01

0.1

µA

ERROR AMPLIFIER (COMPx PINS)

Transconductance

g

m

230

300

370

µS

EA Source Current

I

SOURCE

25

45

65

µA

EA Sink Current

I

SINK

25

45

65

µA

INTERNAL REGULATOR (INTVCC PIN)

INTVCC Voltage

4.75

5

5.25

V

Dropout Voltage

I

INTVCC = 30 mA

400

mV

Regulator Current Limit

40

75

120

mA

SWITCH NODE (SWx PINS)

High-Side On Resistance2

V

BST to VSW = 5 V

90

130

mΩ

SWx Peak Current Limit

R

ILIM = floating, VBST to VSW = 5 V

4

4.8

5.8

A

R

ILIM = 47 kΩ, VBST to VSW = 5 V

2.3

3

3.7

A

R

ILIM = 15 kΩ, VBST to VSW = 5 V

0.8

1.5

2.2

A

SWx Minimum On Time3

t

MIN_ON

130

ns

SWx Minimum Off Time3

t

MIN_OFF

150

ns

LOW-SIDE DRIVER (DLx PINS )

Rising Time3

C

DL = 2.2 nF, see Figure 19

20

ns

Falling Time3

C

DL = 2.2 nF, see Figure 22

10

ns

Sourcing Resistor

4

6

Ω

Sinking Resistor

2

4.5

Ω

OSCILLATOR (RT PIN)

PWM Switching Frequency

f

SW

R

OSC = 100 kΩ

530

600

670

kHz

PWM Frequency Range

250

1200

kHz

SYNCHRONIZATION (SYNC PIN)

SYNC Input

SYNC configured as input

Synchronization Range

300

1200

kHz

Minimum On Pulse Width

100

ns

Minimum Off Pulse Width

100

ns

High Threshold

1.3

V

Low Threshold

0.4

V

SYNC Output

SYNC configured as output

Frequency on SYNC Pin

f

CLKOUT

f

SW

kHz

Positive Pulse Time

100

ns

SOFT START (SSx PINS)

SSx Pin Source Current

I

SS

2.5

3.5

4.5

µA

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