L4972A Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

L4972A

2A SWITCHING REGULATOR

STMicroelectronics 

L4972A

Table 5. Electrical Characteristcs (continued)

Refer to the test circuit, TJ = 25°C, Vi = 35V, R4 = 30KΩ, C9 = 2.7nF, fSW = 100KHz typ, unless otherwise

specified.

Symbol

Parameter

V4R Rising Threshold Voltage

V4H Hysteresis

I4 Input Bias Current

Test Condition

V9 = V13

Min.

4.95

0.4

Typ.

5.1

0.5

1

Max.

5.25

0.6

3

Unit Fig.

V

15

V

15

µA 15

Figure 8.

TYPICAL PERFORMANCES (using evaluation board) :

n = 83% (Vi = 35V ; Vo = VREF ; Io = 2A ; fsw = 100KHz)

Vo RIPPLE = 30mV (at 1A)

Line regulation = 12mV (Vi = 15 to 50V)

Load regulation = 7mV (Io = 0.5 to 2A)

for component values Refer to the fig. 8 (Part list).

Figure 9. Component Layout of fig. 8. Evaluation Board Available (only for DIP version)

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