L6920DB 查看數據表（PDF） - STMicroelectronics

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L6920DB

Synchronous rectifier step up converter

STMicroelectronics 

L6920DB

Detailed description

Table 5. Output voltage connection

Vout = 3.3V

FB pin connected to OUT (see application circuit)

Vout = 5V

FB pin connected to GND

1.8V < Vout < 5.5V FB pin connected to a resistive divider Vout = 1.23V ⋅ ⎝⎛1 + RR-----45--⎠⎞

Figure 9. Test circuit

VBATT=1.5V

C2

47µF

R1

R2

VBATT

L1 10µH

LBI

_____

2

SHDN

7

5

VOUT

8

C4

100nF

L6920DB

VREF

L6920DB

4

___

LBO

3

6

GND

1

FB

R3

R4

200KΩ

R5

200KΩ

VOUT=2.5V

C1

47µF

11/16

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