BD8313HFN

Technical Note

2/17

www.rohm.com

2010.06- Rev.C

© 2010 ROHM Co., Ltd. All rights reserved.



Electrical Characteristics

(Unless otherwise specified, Ta = 25 °C, VCC = 7.4 V)

(※1)100% is MAX Duty as behavior of a PWM conparetor.

Using in region where High side PMOS is 100% on state as application circuit causes detection of SCP then DC/DC converter stops.



Not designed to be resistant to radiation

Parameter

Symbol

Target Value

Unit

Conditions

Min

Typ

Max

[Low voltage input malfunction preventing circuit]

Detection threshold voltage

-

2.9

3.2

V

VREG monitor

Hysteresis range

100

200

300

mV

[Oscillator]

Oscillation frequency

Fosc

0.9

1.0

1.1

MHz

[Regulator]

Output voltage

VREG

4.65

5.0

5.35

V

[Error AMP]

INV threshold voltage

VINV

0.99

1.00

1.01

V

Input bias current

IINV

-50

0

50

nA

Soft-start time

Tss

4.8

8.0

11.1

msec

[PWM comparator]

LX Max Duty

Dmax

-

-

(※)100

%

[Output]

PMOS ON resistance

-

450

600

mΩ

NMOS ON resistance

-

300

420

mΩ

Leak current

Ileak

-1

0

1

uA

[STB]

STB pin

control voltage

Operation

2.5

-

14

V

No-operation

-0.3

-

0.3

V

STB pin pull-down resistance

250

400

700

kΩ

[Circuit current]

Standby current

VCC pin

-

-

1

uA

PVCC pin

-

-

1

uA

Circuit current at operation VCC

-

600

900

uA

Circuit current at operation PVCC

-

30

50

uA