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| 型號(hào)： | S-8328B50MA-EXE-T2 |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.3 A SWITCHING CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO3 |
| 封裝： | PLASTIC, SOT-23, 3 PIN |
| 文件頁(yè)數(shù)： | 37/65頁(yè) |
| 文件大?。?/td> | 759K |
| 代理商： | S-8328B50MA-EXE-T2 |
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SMALL PACKAGE PWM/PFM CONTROL STEP-UP SWITCHING REGULATOR
S-8324/8328 Series
Rev. 7.2_10
42
Seiko Instruments Inc.
2. Procedure to choose the most suitable condition from reference data.
Please refer to the procedures shown below when choosing external parts based on the reference data.
START
Choose the desired output voltage
Choose the condition for desired output current
Operation efficiency is
more important rather than
stand-by efficiency?
*1
*2
*3
No
Yes
Choose the best condition for operation efficiency.
Stand-by
efficiency is OK?
*4
Choose next best
condition for operation
efficiency
Choose the best condition for stand-by efficiency.
Operation efficiency is OK?
*4
Choose next best
condition for operation
ffi i
No
*4
*5
Ripple voltage is OK?
Increase output
current
Yes
*5
No
END
Yes
*4
*1)
Choose desired output voltage from conditions (1) to (17) shown in Table 1 and 2.
When desired output voltage does not exist in Tables, choose the next higher voltage.
For instance, when VOUT=3V for S-8324A, choose from conditions (3) to (6).
*2)
Choose all conditions from conditions choosed avobe for output current needed for input voltage (min) of the
operational condition from “Reference data 1 (a) output voltage characteristics for output current”.
For instance, when 10mA output current is needed at VIN=0.9V, choose from conditions (4) to (6).
*3)
Stand-by efficiency means the efficiency when the output current is small (approx. 100
A), operation efficiency means
the efficiency when the output current is large (several mA).
For instance, go to “YES” when operation efficiency is more important rather than stand-by efficiency.
*4)
Read the efficiency for input voltage and output current in operational condition from “Reference data 1 (b) efficiency
characteristics for output current”.
For instance, when VIN =0.9V at IOUT=10mA, the efficiency is max. (75%) in condition (6) in conditions (4) to (6).
There is no difference between conditions (4) to (6) when the output current is 100
A at stand-by condition.
Therefore, choose condition (6).
*5)
Read the ripple voltage under the operational condition selected above from “Reference data 2 ripple voltage
characteristics for output current”.
For instance, when condition (6) is selected above, the ripple voltage is 14mV at VIN=0.9V and IOUT=10mA.
No
Yes
DISCONTINUED
PRODUCT
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