BD2056AFJ datasheet(6/14 Pages) ROHM

6 / 14 page

BD2046AFJ, BD2056AFJ

Technical Note

6/13

www.rohm.com

2009.05 - Rev.A



Waveform data

Regarding the output rise/fall and over current detection characteristics of BD2046AFJ, refer to the characteristic of BD2056AFJ.

TIME(1ms/div.)

Fig.26 Output rise characteristic

(BD2056AFJ)

V/EN

(5V/div.)

V/OC

(5V/div.)

VIN=5V

RL=10Ω

CL=100uF

V/OC

(5V/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

TIME(1ms/div.)

Fig.27 Output fall characteristic

(BD2056AFJ)

TIME(20ms/div.)

Fig.29 Over current response

Ramped load

(BD2056AFJ)

TIME (2ms/div.)

Fig.31 Over current response

Enable to short circuit

(BD2056AFJ)

V/OC

(5V/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

TIME (1ms/div.)

Fig.32 Over current response

Enable to short circuit

(BD2056AFJ)

TIME (500ms/div.)

Fig.33 Over current response

Enable to short circuit

(BD2056AFJ)

V/OC

(5V/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

TIME (1s/div.)

Fig.34 UVLO response

Increasing VIN

(BD2056AFJ)

VIN=5V

CL=100uF

V/EN

(5V/div.)

V/OC

(5V/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

VIN=5V

V/OC

(5V/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

VIN=5V

CL=100uF

Thermal Shutdown

V/EN

(1V/div.)

VIN=5V

RL=20Ω

V/OC

(1V/div.)

IOUT

(0.1A/div.)

TIME(500us/div.)

Fig.28 Inrush current response

(BD2056AFJ)

V/EN

(5V/div.)

V/OC

(5V/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

VIN=5V

RL=10Ω

CL=100uF

V/OC

(5V/div.)

RL=20Ω

CL=100uF

V/OC

(5V/div.)

VOUT

(5V/div.)

IOUT

(0.5A/div.)

V/OC

(5V/div.)

RL=20Ω

CL=100uF

TIME (1s/div.)

Fig.35 UVLO response

Decreasing VIN

(BD2056AFJ)

TIME(2ms/div.)

Fig.30 Over current response

Ramped load

(BD2056AFJ)

IOUT

(0.5A/div.)

V/OC

(1V/div.)

VOUT

(1V/div.)

CL=47µF

CL=100µ

CL=147µF

CL=200µF

VIN=2.5V

CL=100uF

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