ADP1876 datasheet(4/24 Pages) AD

Part #	ADP1876

Description	600 kHz Dual Output Synchronous Buck

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ADP1876

Data Sheet

Rev. A | Page 4 of 24

SPECIFICATIONS

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control. VIN = 12 V. The specifications

are valid for TJ = −40°C to +125°C, unless otherwise specified. Typical values are at TA = 25°C.

Table 1.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

POWER SUPPLY

Input Voltage

V

IN

2.75

20

V

Undervoltage Lockout Threshold

IN

UVLO

V

IN rising

2.45

2.6

2.75

V

IN falling

2.4

2.5

2.6

Undervoltage Lockout Hysteresis

0.1

V

Quiescent Current

I

IN

EN1 = EN2 = V

IN = 12 V, VFB = VCCO

(no switching)

4.5

5.9

mA

Shutdown Current

I

IN_SD

EN1 = EN2 = GND, V

IN = 5.5 V or 20 V

100

200

µA

ERROR AMPLIFIER

FB Input Bias Current

I

FB

−100

+1

+100

nA

Transconductance

g

m

Sink or source 1 µA

385

550

715

µS

TRK1 Input Bias Current

I

TRK

0 V < V

TRK1 < 1.5 V

−100

+1

+100

nA

CURRENT SENSE AMPLIFIER GAIN

A

CS

Gain resistor connected to DLx,

R

CSG = 47 kΩ ± 5%

2.4

3

3.6

V/V

Gain resistor connected to DLx,

R

CSG = 22 kΩ ± 5%

5.2

6

6.9

V/V

Default setting, R

CSG = open

10.5

12

13.5

V/V

Gain resistor connected to DLx,

R

CSG = 100 kΩ ± 5%

20.5

24

26.5

V/V

OUTPUT CHARACTERICTISTICS

Feedback Accuracy Voltage

V

FB

T

J = −40°C to +85°C, VFB = 0.6 V

−0.85%

+0.6

+0.85%

V

T

J = −40°C to +125°C, VFB = 0.6 V

−1.5%

+0.6

+1.5%

V

Line Regulation of PWM

ΔV

FB/ΔVIN

±0.015

%/V

Load Regulation of PWM

ΔV

FB/ΔVCOMP

V

COMP range 0.9 V to 2.2 V

±0.3

%

Oscillator Frequency

f

OSC

475

600

690

kHz

LINEAR REGULATOR VCCO

VCCO Output Voltage

T

A = 25°C, IVCCO = 100 mA

4.8

5.0

5.18

V

T

J = −40°C to +125°C

4.7

5.0

5.3

V

VCCO Load Regulation

I

VCCO = 0 mA to 100 mA,

35

mV

VCCO Line Regulation

V

IN = 5.5 V to 20 V, IVCCO = 20 mA

10

mV

VCCO Short-Circuit Current1

VCCO < 0.5 V

370

400

mA

VIN to VCCO Dropout Voltage2

V

DROPOUT

I

VCCO = 100 mA, VIN ≤ 5 V

0.33

V

LOGIC INPUTS

EN1, EN2 Threshold

EN1/EN2 rising

0.57

0.63

0.68

V

EN1, EN2 Hysteresis

0.03

V

EN1, EN2 Input Leakage Current

I

EN

V

IN = 2.75 V to 20 V

1

200

nA

GATE DRIVERS (DHx, DLx PINS)

DHx Rise Time

C

DH = 3 nF, VBST − VSW = 5 V

16

ns

DHx Fall Time

C

DH = 3 nF, VBST − VSW = 5 V

14

ns

DLx Rise Time

C

DL = 3 nF

16

ns

DLx Fall Time

C

DL = 3 nF

14

ns

DHx to DLx Dead Time

External 3 nF capacitor is connected to

DHx and DLx

25

ns

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