EP1551 datasheet(5/16 Pages) EOREX

5 / 16 page

Preliminary

Rev.01

5/16

EP1551

Parameter

Conditions

MIN

TYP

MAX

unit

AUXILIARY DC-DC CONTROLLERS (AUX 1, 2, AND 3) :

Maximum Duty Cycle

FB_ = 1V

FB_ Regulation Voltage

1.225

1.25

1.275

FB_ to COMP_

Transconductance

FB_ = COMP_

135

185

µS

FB_ Input Leakage Current

FBSU =1.25V

-100

100

AUX1 Output Regulation

Voltage

FBSEL1 = GND, FB1connected

directly AUX1 output

4.85

5.15

Output high

DL_ Driver Resistance

Output low

Ω

DL_ Driver Current

Sourcing or sinking

0.5

Soft-Start Interval

4096

OSC

cycle

LOGIC INPUTS (ON_, FBSEL):

1.1V < OUTSU < 1.8V (ONSU only)

0.2

Input Low Level

1.8V < OUTSU < 5.5V

0.4

1.1V < OUTSU < 1.8V (ONSU only)

VOUT

-0.2

Input High Level

1.8V < OUTSU < 5.5V

1.6

FBSEL = 3.6V, OUTSU = 3.6V

-100

100

FBSEL_ Input Leakage

Current

FBSEL = GND, OUTSU = 3.6V

-100

100

ONSU Impedance to GND

ONSU=3.35V

303

KΩ

ONSD Impedance to GND

ONSD=3.35V

275

KΩ

ON_ Impedance to GND

ON_ =3.35V

308

KΩ

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