1.6V to 5.5V Input, 0.5% Accurate, Dual

180° Out-of-Phase Step-Down Controllers

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3

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Total of VDD1 + VDD2 + AVDD current, SYNC = GND,

no load on DH_ or DL_

20

32

mA

IN Supply Current

35

100

µA

IN Shutdown Supply Current

20

µA

REF Voltage

1.267

1.28

1.293

V

REF Load Regulation

0.01

V

Default Current-Limit Threshold

127.5

150

172.5

mV

Ω

60

75

90

Adjustable Current-Limit

Threshold

Measured from PGND to LX_

Ω

240

300

360

mV

Thermal-Shutdown Threshold

°C hysteresis

160

°C

DH_ Gate-Driver

On-Resistance

Pulling up or down

1

1.8

Ω

DL_ Gate-Driver Pullup

On-Resistance

DL_ high state

1

1.8

Ω

DL_ Gate-Driver Pulldown

On-Resistance

DL_ low state

0.35

0.65

Ω

DH_ falling to DL_ rising

23

Dead Time (Adaptive)

DL_ falling to DH_ rising

26

ns

SYNC Minimum Pulse Width

High or low

200

ns

EN Voltage Range for Nominal

Output Voltage

80

90

100

%

EN Voltage Range for Positive

Voltage Margining

55

70

%

EN Voltage Range for Negative

Voltage Margining

30

45

%

EN Voltage Range for Shutdown

020

%

EN, SEQ, SYNC Input High

Voltage

(Note 4)

V

SEQ, SYNC Input Low Voltage

0.5

V

EN, SEQ, SYNC Input Current

-1

+1

µA

BST_ Leakage Current in

Shutdown

-20

+20

µA

4.75

5.50

V

ELECTRICAL CHARACTERISTICS (continued)