參數(shù)資料
型號(hào)： R1150HXXXX
英文描述： Power Management ICs
中文描述： 電源管理IC
文件頁(yè)數(shù)： 23/24頁(yè)
文件大小： 286K
代理商： R1150HXXXX
Rev. 1.11 -23-
I
TECHNICAL NOTES
Phase Compensation
Phase Compensation of the R1150H Series has been made internally for stable operation even though the load
current would vary. Therefore, without the capacitors, C
IN
and C
OUT
, Output Voltage is regulated, but for more
stable operation, use capacitors as C
IN
and C
OUT
. Recommended value is in the range from 0.1μF to 1.0μF. Wiring
should be made as short as possible.
PCB layout
Current flows into wiring for V
DD
or GND, thus, if the impedance of the wiring is rather high, it may cause of making
noise or unstable operation, thus width and pattern should be enough wide to avoid such problems. Connect the
capacitor, C
IN
between V
DD
pin and GND pin as close as possible.
R1150HxxxA Typical Application
Thermal Shutdown
Thermal shutdown function is included in the R1150HxxxA/B/C/D Series, when the junction temperature is equal or
more than +150°C (TYP.), the operation of regulator would stop. After that, when the junction temperature is equal
or less than +120°C (TYP.), the operation of regulator would restart. Unless the cause of rising temperature would
remove, the regulator repeats on and off, and output waveform would be like consecutive pulses.
Chip Enable Circuit
Do not make voltage level of chip enable pin keep floating level, or in between V
IH
and V
IL.
Unless otherwise, Output
voltage would be unstable or indefinite, or unexpected current would flow internally.
Output Delay Time for Release V
DET
In the R1150Hxx1C/D can set an output delay time for release voltage detector with connecting a capacitor to C
D
pin.
When an input voltage (in the case of R1150Hxx1C) or an output voltage (in the case of R1150Hxx1D) surpasses
the release voltage of its voltage detector (+V
DET
), the capacitor which is connected to C
D
pin is started to be
charged, as a result, C
D
pin voltage rises. When the C
D
pin voltage surpasses C
D
pin threshold voltage, the output
voltage of the voltage detector outputs
“
H
”
.
470k
GND
2
V
DD
CE
V
OUT
V
IN
C
IN
R1150HxxxA
SERIES
V
DET
5
3
4
1
I
OUT
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