IFX1117(2009) データシートの表示（PDF） - Infineon Technologies

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IFX1117
(Rev.:2009)

Voltage Regulator

Infineon Technologies 

IFX 1117

Output

The IFX 1117 requires a 10 µF output capacitor with ESR ≤ 20 Ω for the stability of the

regulation loop. The use of a tantalum output capacitor is recommended.

For the adjustable device IFX 1117 GSV the output voltage level can be defined by a

voltage divider between Q, ADJ and GND.

The output voltage calculates:

VQ

=

VREF

×





1

+

RR-----21

+ IADJ × R2

(1)

At the input of the regulator a capacitor is recommended to compensate line influences.

As a minimum a 100 nF ceramic input capacitor should be used. If the regulator is used

in an environment with long input lines an input capacitance of 10 µF is suggested.

IFX 1117 GSV

VI

I3

CI1

CI2

2Q

VQ

CQ2

1

ADJ IADJ

R1 VQ - VADJ = VREF

R2

CADJ

AES02815_1117

Figure 6 Typical Application Circuit IFX 1117 GSV

Data Sheet

9

Rev. 1.21, 2009-09-04

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