NCP1855

http://onsemi.com

8

Table 4. ELECTRICAL CHARACTERISTICS

Symbol

Unit

Max

Typ

Min

Conditions

Parameter

BOOST CONVERTER AND OTG MODE

Boost minimum input

operating range

Boost start−up

3.1

3.2

3.3

V

Boost running

2.9

3

3.1

V

Boost maximum input

operating range

4.4

4.5

4.6

V

Boost Output Voltage

DC value measured on CAP pin, no load

5.00

5.1

5.15

V

Boost Output Voltage accuracy

Measured on CAP pin Including line and load

regulation

−3

3

%

Output current capability

Configured Mode

1000

mA

Un−configured Mode

150

mA

Switching Frequency

1.35

1.5

1.65

MHz

Maximum peak inductor current

2.5

A

Boost overload

Voltage on CAP pin, falling

4.5

4.6

4.65

V

Un−configured Mode, falling, Voltage on IN pin

4.3

4.4

4.5

Boost start−up time

32

ms

Boost Pre−charge current

Un−configured Mode, Measured on IN pin

RLOAD = 29

W, CLOAD = 10 mF

350

mA

Configured Mode, Measured on IN pin

RLOAD = 5.1

W, CLOAD = 10 mF

1.1

A

Boost Rise time

Configured Mode,

Measured on

VIN, VIN rising

(see Figure 3)

RLOAD =

∞,

CLOAD = 1

mF

0.3

4

ms

RLOAD = 5.1

W,

CLOAD = 10

mF

Overvoltage protection

5.55

5.65

5.75

V

Hysteresis

25

75

125

mV

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performance may not be indicated by the Electrical Characteristics if operated under different conditions.

Figure 3. Boost Test Schematic

90%

10%

CLOAD

RLOAD

VIN