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参数资料
| 型号： | RV5VE001V-E2 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | 0.65 MM PITCH, SSOP-16 |
| 文件页数： | 42/49页 |
| 文件大小： | 321K |
| 代理商： | RV5VE001V-E2 |
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46
TYPICAL APPLICATION
RV5VE001
×
RV5VE0
×××
In this example of the circuit, the output of Regulator 4 is used as the power source for CPU. The voltage input
to CSW 1, 2, 3 pins is subject to level shift within the IC so as to have the same level as that of the voltage of CPU.
Therefore CSW 1, 2, 3 pins can be directly connected to CPU. Detector 1 monitors the voltage of the battery and
Detector 2 monitors the voltage of the power source for CPU.
Application for Cellular Phones (RV5VE001
×)
VCC
C5
C1
C2
C4 C3
CD
Tr
R1
R2
R3
R4
Tr
VDD
ROUT4
VSEN2
CD
RESET
DOUT
ROUT1
IBC1
GND
ROUT3
VSEN1
CSW3
CSW1
ROUT2
IBC2
I/O
Logic
Unit
CPU
INT
RESET
Memory
Unit
Transmitter
Unit
Receiver/Audio
Unit
SBD
CSW2
I/O
R
×5VE001×
C1,2,5=10F / C3,4=0.1F / CD=0.1F
R1,2,3,4=100k
Tr: 2SB799(NEC PNP type,hFE=100 to 200)
SBD: MA717(Panasonic)
APPLICATION HINTS
When using these ICs, be sure to take care of the following points :
Minimize the impedance of VDD and GND wiring. In particular, with respect to the VDD wiring, the output cur-
rent of Regulators flows thereinto, so that when the wiring impedance is high, the operation of the IC tends to be
unstable and is vulnerable to noise.
Provide a capacitor with a capacitance of about 10F between VDD pin and GND pin with a minimum wiring
length.
Rush current flows into the capacitor connected to the output of Regulators at the start of the operation of the
Regulators. In particular, Regulators 1, 2 are equipped with External PNP Transistor and accordingly have
excellent drive performance. Therefore, when Regulators 1, 2 start to operate, for example, under the conditions
that hFE of External PNP Transistor is 100 and the base current of the limiter is 5mA, a rush current of 500mA
flows into the regulators. When the wiring impedance is high, the Power Source Voltage applied to IC tends to
be varied by the rush current, so that the operation of IC may be adversely affected by the variation of the Power
Source Voltage.
In these ICs phase compensation is made for securing stable operation even when the load current is varied.
Select the capacitors C1 to C4 conecting the Pin ROUT1 to ROUT4 with good frequency characteristics and small
ESR.
Be sure to connect a resistor with a resistance of about 100k
between the base and the emitter for preventing
the oscillation.
Set external parts as close as possible to the IC and minimize the connection between the parts and the IC.
When using a capacitor connected to CD pin, use a Schottky Barrier Diode (SBD) to discharge CD capacitor at
the time of abrupt fluctuation of power source voltage.
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相关代理商/技术参数 |
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| RV5VEXXXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Management ICs |
| RV5VG101C | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:RECHARGEABLE LITHIUM-ION CELL PROTECTORS |
| RV5VG101C-E1 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:RECHARGEABLE LITHIUM-ION CELL PROTECTORS |
| RV5VG101C-E2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:RECHARGEABLE LITHIUM-ION CELL PROTECTORS |
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