BD19910MUV datasheet(2/5 Pages) ROHM

Part #	BD19910MUV

Description	Silicon monolithic IC

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Manufacturer	ROHM [Rohm]

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REV. A

○Electrical characteristics （PVCC1=PVCC2=AVCC=5.0V,Ta=25℃ unless otherwise specified）

Parameter

Symbol

MIN.

TYP.

MAX.

UNIT

Condition

[TOTAL]

Current consumption

ICC

-

3.6

7.2

mA

VDCO1=VDCO2=5V, FB3=0V,

CSWON=ENUP=5V, XENDWN=0V

Shutdown current

ISHUT

-

1.2

3.0

mA

ENUP=0V, XENDWN=5V

[Input IO Block : ENUP, XENDWN, SELDCO1, SELSQ, SELRST, CSWON]

High level input voltage

VIOH

2.0

-

V

Low level input voltage

VIOL

-

0.8

V

input current H

IIO1

-5.0

-

5.0

μA

Input=5V

input current L

IIO2

-5.0

-

5.0

μA

Input=0V

[Step-down DC-to-DC Converter Block]

VDCO1 voltage

VDCO1A

1.455

1.500

1.545

V

SELDCO1=0V

VDCO1B

0.970

1.000

1.030

V

SELDCO1=5V

VDCO2 voltage

VDCO2

3.201

3.300

3.399

V

Oscillation frequency

fOSCDWN

1.4

2.0

2.6

MHz

High-side-switch resistance

RONH1,2

-

0.40

0.60

Ω

Low-side-switch resistance

RONL1,2

-

0.30

0.50

Ω

Soft start time

tSOFTDWN

0.6

1.0

1.8

ms

No load

[Step-up DC-to-DC Converter Block]

FB（VREF） voltage

VFB3

0.582

0.600

0.618

V

Oscillation frequency

fOSCUP

0.7

1.0

1.3

MHz

High-side-switch resistance

RONH3

-

0.35

0.60

Ω

VDCO3=10V

Low-side-switch resistance

RONL3

-

0.30

0.50

Ω

VDCO3=10V

Soft-start beginning time

tSOFTUP

3.5

6.0

8.5

ms

FB3=0V

AMPOUT3 maximum voltage

VAMPOH

2.2

2.5

2.8

V

FB3=0V

AMPOUT3 minimum voltage

VAMPOL

-

0.03

0.20

V

FB3=2.5V

Max Duty cycle

DMAX

72

80

88

%

FB3=0V

[Reset Block]

Reset ON voltage

VRSTON1A

3.600

3.700

3.800

V

AVCC is observed, SELRST=0V

VRSTON1B

4.087

4.200

4.313

V

AVCC is observed, SELRST=5V

VRSTON2A

1.140

1.200

1.260

V

VDCO1 is observed, SELDCO1=0V

VRSTON2B

0.665

0.700

0.735

V

VDCO1 is observed, SELDCO1=5V

VRSTON3

2.565

2.700

2.835

V

VDCO2 is observed

Reset hysteresis voltage

VRSTHYS1A

70

100

130

mV

AVCC is observed, SELRST=0V

VRSTHYS1B

70

100

130

mV

AVCC is observed, SELRST=5V

VRSTHYS2A

70

100

130

mV

VDCO1 is observed, SELDCO1=0V

VRSTHYS2B

70

100

130

mV

VDCO1 is observed, SELDCO1=5V

VRSTHYS3

70

100

130

mV

VDCO2 is observed

XRESET output sink voltage

VRSINK

-

0.3

V

ISINK=5.0mA

XRESET leak current

IRLK

-5.0

-

5.0

μA

XRESET=5.0V

Reset delay time

tRST

30

50

70

ms

[Current Switch Block]

Current SW ON resistance

RCSWO

-

0.5

1.0

Ω

CSWON=5V

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