BD8303MUV-E2 datasheet(4/18 Pages) ROHM

Part #	BD8303MUV-E2

Description	Step-up/down, High-efficiency Switching Regulators (Controller type)

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Manufacturer	ROHM [Rohm]

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Technical Note

4/15

BD8303MUV

www.rohm.com

2013.07 - Rev.B

○

c

● Package Heat Reduction Curve

Fig.16

Efficiency data (VOUT = 3.3 V)

Example of Application Circuit [1]

Fig.17

Efficiency data (VOUT = 5.0 V)

Example of Application Circuit [2]

Fig.18

Efficiency data (VOUT = 8.4 V)

Example of Application Circuit [3]

Fig.13 Starting waveform

(Example of Application Circuit [2])

L=10uH, Cout = 47 uH, fosc = 750

kHz, unloaded

Fig.14 Oscillation waveform

VCC = 5.0 V, Vout = 5.0 V

I LOAD = 1000 mA

Fig.10 Line regulation

Fig.11 Load regulation

Fig.15 Load variation waveform

(Example of Application Circuit [2])

VCC = 7.4 V, Vout = 5.0 V,

I LOAD = 200 mA

1000 mA :40 mA/usec

0

10

20

30

40

50

60

70

80

90

100

0

500

1000

1500

LOAD CURRENT [mA]

0

10

20

30

40

50

60

70

80

90

100

0

1000

2000

3000

LOAD CURRENT [mA]

0

10

20

30

40

50

60

70

80

90

100

0

500

1000

1500

2000

LOAD CURRENT [mA]

500usec/div

ILOAD(500mA/div)

VOUT(100mV/div)

500usec/div

SW1 oscillation

waveform (2.0V/div)

SW2 oscillation

waveform (2.0V/div)

VOUT(2.0V/div)

STB(5.0V/div)

Input current (200mA/div)

0

100

200

300

400

500

600

700

0

25

50

75

100

125

150

AMBIENT TEMPERATURE[℃]

Fig.19 heat reduction curve (IC alone)

When used at Ta = 25°C or more, it is reduced by 4.96 mW/°C.

Fig.12 MAX Duty / MIN Duty

temperature property

4.950

4.975

5.000

5.025

5.050

0

500

1000

1500

LOAD CURRENT [mA]

4.950

4.975

5.000

5.025

5.050

0

5

10

15

VCC VOLTAGE [V]

0

10

20

30

40

50

60

70

80

90

100

0

500

1000

1500

LOAD CURRENT [mA]

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