ADP2450ACPZ-4-R7 datasheet(6/40 Pages) AD

6 / 40 page

ADP2450

Data Sheet

Rev. B | Page 6 of 40

BUCK REGULATOR SPECIFICATIONS

VIN = 12 V, TJ = −40°C to +125°C for minimum and maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted.

Table 2.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

POWER INPUT

VIN pin

Undervoltage Lockout Threshold1

VIN Rising

4.2

4.4

VIN Falling

3.5

3.65

FEEDBACK (FB2)

FB2 Regulation Voltage

VFB2

Adjustable output version

0.591

0.6

0.609

Fixed Output Accuracy

Fixed output version

−1.5

+1.5

FB2 Bias Current

IFB2

Adjustable output version

0.01

0.1

μA

Fixed output version

4.3

μA

SWITCH NODE

High-Side On Resistance (LFCSP)2

RDSON_H_LFCSP

ISW_SOURCE = 0.5 A

700

1070

mΩ

Low-Side On Resistance (LFCSP)2

RDSON_L_LFCSP

ISW_SINK = 0.5 A

380

540

mΩ

High-Side On Resistance (LQFP)2

RDSON_H_LQFP

750

1210

mΩ

Low-Side On Resistance (LQFP)2

RDSON_L_LQFP

430

620

mΩ

SW Leakage Current

ISW_LK_HS

SW = PGND2

0.1

μA

ISW_LK_LS

SW = VIN

μA

Minimum On Time

tON_MIN

Minimum Off Time

tOFF_MIN

150

BST

Bootstrap Voltage

VBOOT

4.7

5.3

CURRENT LIMIT

Valley Current Limit

0.65

0.8

0.98

Low-Side Sink Current Limit

0.2

PWM SWITCHING FREQUENCY

fSW

1.0

1.2

1.4

MHz

SOFT START TIME

tSS

Fixed output version

400

μs

Adjustable output version

1.6

RESET (RSTO)

Reset Rising Threshold Voltage

Refer to VFB2

Reset Threshold Hysteresis

Reset Rising Delay

tRST_DELAY_R

Option 1, default

0.42

0.5

0.56

Option 2

0.85

1.12

Option 3

1.72

2.3

Option 4

4.2

5.6

Reset Falling Delay

tRST_DELAY_F

μs

RSTO Output Low Voltage

IRSTO = 3 mA

100

RSTO Leakage Current

VRSTO = 5 V

0.01

0.3

μA

1 This UVLO threshold is only for the buck control block.

2 Pin to pin measurement.

PROGRAMMABLE GAIN AMPLIFIER AND ANALOG TRIP SPECIFICATIONS

VIN = 12 V, VAVDD = 5 V, TJ = −40°C to +125°C for minimum and maximum specifications, and TA = 25°C for typical specifications, unless

otherwise noted.

Table 3.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

POWER INPUT

AVDD pin

Input Voltage Range

VAVDD

2.7

5.5

Quiescent Current

IQ_AVDD

575

μA

Undervoltage Lockout Threshold

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