BD9540EFV

Technical Note

2/17

www.rohm.com

2009.04 - Rev.B

© 2009 ROHM Co., Ltd. All rights reserved.

●

Operating Conditions (Ta=25℃)

Parameter

Symbol

Min.

Max.

Unit

Input voltage

VIN

7.5

20

V

BOOT voltage

BOOT1, BOOT2

4.5

25

V

SW Voltage

SW1, SW2

-0.7

20

V

BOOT-SW voltage

BOOT1-SW1, BOOT2-SW2

4.5

5.5

V

Logic Input Voltage 1

EN1, EN2

0

20

V

Logic Input Voltage 2

CTL1, CTL2

0

5.5

V

Output Voltage

VOUT1, VOUT2

0.7

5.5

V

MIN ON Time

tonmin

-

100

ns

*This product should not be used in a radioactive environment.

*The range of the VOUT is limited by the voltage between VIN and VOUT.

●

Electrical characteristics

(Unless otherwise noted, Ta=25℃ VCC=5V, VIN=12V, VEN1=VEN2=3V, Vout1=1.5V, Vout2=1.05V)

Parameter

Symbol

Limit

Unit

Condition

Min.

Typ.

Max.

[General]

VIN Bias Current

IIN

-

1.6

2.5

mA

VIN Standby Current

IIN_stb

-

0

10

μA

VEN1=VEN2=0V

EN Low Voltage 1,2

VEN_low1,2

GND

-

0.3

V

EN High Voltage 1,2

VEN_high1,2

2.2

-

20

V

EN Bias Current 1,2

IEN1,2

-

1.5

5.0

μA

VEN1=VEN2=3V

[5V Linear Regulator]

5VReg Standby Voltage

5Vreg_stb

-

-

0.1

V

VEN1=VEN2=0V

5VReg Output Voltage

5VReg

4.8

5.0

5.2

V

VIN=7.5V to 20V

Ireg=0mA to 10mA

Maximum Current

IReg

50

-

-

mA

[Under-Voltage Lock-Out]

5VReg Threshold Voltage

5Vreg_UVLO

3.75

4.20

4.65

V

5VReg:Sweep up

5VReg Hysteresis Voltage

d5Vreg_UVLO

100

160

220

mV

5VReg:Sweep down

[OVP Block]

FB Threshold Voltage 1

FB_OVP1

0.92

1.02

1.12

V

FB Threshold Voltage 2

FB_OVP2

0.80

0.90

1.00

V

OVP delay time

tOVP

-

1.7

-

μs

[H

ON Time1

ton1

290

390

490

ns

MIN OFF Time 1

toffmin1

200

380

-

ns

ON Time 2

ton2

110

210

310

ns

MIN OFF Time 2

toffmin2

200

380

-

ns

[FET Block]

HG High side ON Resistance 1,2 RHGhon1,2

-

5.5

11

Ω

HG Low side ON Resistance 1,2

RHGlon1,2

-

2.5

5

Ω

LG High side ON Resistance 1,2

RLGhon1,2

-

4

8

Ω

LG Low side ON Resistance 1,2

RLGlon1,2

-

2

4

Ω

[Over Current Protection Block]

Current Limit

Threshold Voltage 1,2

Vilim1,2

80

100

120

mV

RILIM=100kΩ

[Output Voltage Detection Block]

FB1 threshold(REF1) Voltage1

FB1-1

0.769

0.781

0.793

V

CTL1=0V, CTL2=0V

FB1 threshold(REF1) Voltage2

FB1-2

0.802

0.814

0.826

V

CTL1=5V, CTL2=0V

FB1 threshold(REF1) Voltage3

FB1-3

0.839

0.851

0.863

V

CTL1=0V, CTL2=5V

FB1 threshold(REF1) Voltage4

FB1-4

0.738

0.750

0.762

V

CTL1=5V, CTL2=5V

FB2 threshold(REF2) Voltage

FB2

0.738

0.750

0.762

V

CTL Low Voltage 1,2

VCTL_low1,2

GND

-

0.5

V

CTL High Voltage 1,2

VCTL_high1,2

VCC-0.5

-

VCC

V

FB1/2 Input Current

IFB1,2

-1

-

1

μA

VOUT Discharge Current

IVOUT1,2

5

10

-

mA

VOUT=1V, EN=0V

[SCP Block]

Threshold Voltage 1,2

Vthscp1,2

REF1,2×

0.60

REF1,2×

0.70

REF1,2×

0.80

V

SCP delay time

tSVP

-

28

-

μs