ADPL12002/ADPL12003

20V, 2.5A/3.5A, Fully Integrated Synchronous

Buck Converter

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Electrical Characteristics

(VSUP = VEN = 14V, TJ = -40°C to +150°C, unless otherwise noted. Typical values are at TA = +25°C under normal conditions unless

otherwise noted. See Note 1 and Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

VSUP

3

20

V

Supply Current

ISUP_SHDN

VEN = 0, TA = +25°C

2.75

5.00

μA

ISUP

VEN = high, VOUT = 0.8V, no load,

switching, TA = +25°C

27

SUP Undervoltage

Lockout

VSUP_UVLO_R

ISE

SUP voltage rising

2.900

3.025

3.150

V

VSUP_UVLO_F

ALL

SUP voltage falling

2.600

2.725

2.850

BIAS Voltage

VBIAS

1.8

V

BIAS Undervoltage

Lockout

VBIAS_UVLO

BIAS voltage rising

1.58

1.63

1.68

V

BIAS Undervoltage

Lockout Hysteresis

VBIAS_UVLO_

HYS

BIAS UVLO hysteresis (See Note 3)

65

mV

BUCK CONVERTER

Output Voltage

Adjustable Range

VOUT

0.8

12

V

Feedback Voltage

Accuracy

VFB_PWM

VFB = 0.8V, PWM mode, no load,

TA = -40°C to +125°C

0.788

0.800

0.812

V

Feedback Leakage

Current

IFB

VFB = 0.8V, TA = +25°C

100

nA

High-Side DMOS

On-Resistance

RDSON_HS

VBIAS = 1.8V, ILX = 0.5A

96

175

mΩ

Low-Side DMOS

On-Resistance

RDSON_LS

VBIAS = 1.8V, ILX = 0.5A

46

90

mΩ

High-Side DMOS

Current-Limit Threshold

ILIM

ADPL12002

3.3

4.0

4.7

A

ADPL12003

4.375

5.300

6.200

LX Leakage

ILX_LKG

VSUP = 20V, VLX = 0V, or VLX = 20V,

TA = +25°C

1

μA

Soft-Start Ramp Time

tSS

fSW = 400kHz

2.5

ms

fSW = 1.5MHz

3.5

Minimum On-Time

tON

37

65

ns

Maximum Duty Cycle

DMAX

Dropout mode

98

99

%

SWITCHING FREQUENCY

PWM Switching

Frequency

fSW

fSW = 400kHz

360

400

440

kHz

fSW = 1.5MHz

1.375

1.500

1.625

MHz

SYNC External Clock

Frequency

fSYNC

fSW = 400kHz

360

600

kHz

fSW = 1.5MHz

1.215

1.845

MHz

Spread Spectrum

SPS

Percentage of fSW

±6

%

PGOOD OUTPUT

PGOOD UV Threshold

VPGOOD_UV_

THR

VOUT rising

91.75

94.00

96.25

%

VPGOOD_UV_

THF

VOUT falling

90.75

93.00

95.25