RT9187 データシートの表示（PDF） - Richtek Technology
部品番号
コンポーネント説明
メーカー
RT9187 Datasheet PDF : 9 Pages
| |||
RT9187
Typical Application Circuit
VIN CIN
2.2uF
Chip Enable
VIN
VOUT
RT9187
BP
EN
GND
VOUT
COUT
2.2uF
CBP
10nF
VIN
CIN
2.2uF
Chip Enable
VIN
VOUT
RT9187
ADJ
EN
GND
VOUT
COUT
R1
2.2uF
R2
Figure 1. Fixed Operation
Figure 2. Adjustable Operation
VOUT =
0.8 x
(1+ R1
R2
) Volts
Note: The value of R2 should be less than 80k to
maintain regulation.
Function Pin Description
Pin No.
Fixed Output Adjustable
Voltage Output Voltage
Pin
Name
Pin Function
1
1
VIN
Supply Input.
2
2
VIN
Supply Input.
3
3
VOUT Regulator Output.
4
4
VOUT Regulator Output.
Noise Reduction. Connecting a 10nF capacitor to GND to reduce
5
--
BP
output noise.
If external feedback resistors are applied, the output voltage will be:
--
5
ADJ
VOUT
=
0 .8
×
(1+
R1)
R2
Vo lts
6
6
GND Ground
7
7
NC
No Internal Connection.
8
8
Exposed Pad (9)
Enable Input Logic, Active High. W hen the EN goes to a logic low, the
EN
device is in shutdown mode.
No Internal Connection. The exposed pad must be soldered to a
NC
large PCB and connected to GND for maximum power dissipation.
www.richtek.com
2
DS9187-09 April 2008
Share Link: 