參數(shù)資料
型號(hào)： R5310L001B
廠商： RICOH COMPANY LTD
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Multi LDOs for Cellular-phone
中文描述： FIXED POSITIVE LDO REGULATOR, PQFP32
封裝： 0.50 MM PITCH, LQFP-32
文件頁(yè)數(shù)： 15/34頁(yè)
文件大?。?/td> 270K
代理商： R5310L001B
Rev.1.10
- 15 -
1-8. Operation after Interrupt Procedure
In the case that CSB input becomes to high by interrupting while a command-set which has not yet been acknowledged, the
command-set is disabled by internal reset signal, therefore, after this case, transaction should be executed from the initial
condition.
2.
Embedded 8 regulators are classified into 4 groups as follows by their characteristics:
Voltage Regulators
[High Speed Type] VR1, 2, 5, 7
With High ripple rejection (Typ. 65dB at 1kHz) and Low Noise, they are suitable for RF and analog circuits.
And the load transient response is also good, therefore they are recommendable for DSP which requires fast dynamic
response to load current.
[Adjustable Output Voltage Type] VR3, 4
They include 8-bit D/A converter (guaranteed monotonous increase) each, users can select output voltage in a range by 3-
wire serial interface control. They are suitable for various applications which do not require much load current (Max.
20mA), such as PA bias, AGC, LCD luminance adjuster and can be used as voltage references.
[Boost Type] VR6
VR6 is used with an external PNP transistor and can supply large output current. This regulator is always ON, therefore
its supply current is enough minimized to save invalid current by design (Typ. 6μA).
[For Vibrator] VR8
VR8 can drive a vibrator (which requires 1.3V as a supply voltage) directly.
3.
VD1 monitors the voltage of VR6, when the voltage becomes lower than setting detector threshold voltage, D
OUT1
pin becomes
“L”, and internal logic is initialized, furthermore does not accept input signal. It is suitable for reset CPU. Output type is Nch
open drain and pull-up resistance to VR6. Setting output delay time (Reset Released Delay Time) is possible with connecting
an external capacitance to C
D
pin. The formula which shows the relation between External capacitance value (C
D
) and output
delay time is as follows:
tD=0.67
×
10
6
×
C
D
Voltage Detectors
VD2 monitors V
DD
voltage, when the voltage becomes lower than setting output voltage threshold, D
OUT2
becomes “L”, and
disables VR6. It is suitable for detecting cutting off a battery voltage in a flash and can be used to set a operation starting
voltage. Output Type is CMOS and its “H” level equals to voltage of R
OUT6
.
VD3 monitors also V
DD
voltage, when the voltage becomes higher than setting output threshold, VD3 disables VR6. It is
necessary to protect circuits from large input voltage.
VD4 monitors the voltage of VR6, when the voltage becomes higher than setting output threshold, it disables VR6 and protect
a coin battery for backup. When R
OUT6
is equal or less than setting output threshold, VR6 turns on again. Thus, the operation is
repeated until VR6 outputs normal voltage.
4.
Ringer controller is composed with an external PNP transistor. It can control a Ringer in the range from 6
to 32
.
By 3-wire interface controller, ON and OFF, 3bit electrical volume can be controlled. The Output is also controlled to accept
“ON” command and input signal of TONE pin via 3-wire interface, thus it can generate any melody. Output condition via 3-
wire interface controller inputs and TONE input is shown below:
Ringer Controller
3-wire input
0 (OFF)
1 (ON)
1 (ON)
TONE input
0 or 1
0
1
Ringer Output
OFF
OFF (standby)
ON
Supply Current (for Ringer Controller Circuit Part)
(almost 0μA)
(approximately 500μA)
(approximately 100μA (only for internal circuit))
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