參數(shù)資料
型號(hào): S-8357G33MC-MIST2U
元件分類(lèi): 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO5
封裝: HALOGEN FREE AND LEAD FREE, SOT-23, 5 PIN
文件頁(yè)數(shù): 22/77頁(yè)
文件大?。?/td> 836K
代理商: S-8357G33MC-MIST2U
STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.7.0_00
S-8355/56/57/58 Series
Seiko Instruments Inc.
29
External Parts Selection
The relationship between the major characteristics of the step-up circuit and the characteristics parameters of the
external parts are shown in Figure 16.
For higher efficiency ?
For larger output current ?
Operation
efficiency
Stand-by
efficiency
For smaller ripple voltage ?
Smaller inductance
Larger inductance
Smaller direct current resistance of inductor
Larger output capacitance
With MOS FET,
smaller ON resistance
With MOS FET,
smaller input capacitance
With bipolar transistor,
smaller external resistance Rb
With bipolar transistor, larger
external resistance Rb
Figure 16 Relationship between Major Characteristics of Step-up Circuit and External Parts
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