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參數資料
| 型號： | S-8352D30MC-K8P-T2 |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.3 A SWITCHING CONTROLLER, 110 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數： | 7/50頁 |
| 文件大小： | 635K |
| 代理商： | S-8352D30MC-K8P-T2 |
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STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.1.2_00
S-8351/8352 Series
Seiko Instruments Inc.
15
Operation
1. Step-up DC-DC Converter
The S-8351/8352 Series is a DC-DC converter that uses a pulse frequency modulation method (PFM) and features
low current consumption. This series is an especially efficient DC-DC converter at an output current of 100
A or
lower.
In conventional fixed-duty PFM DC-DC converters, although a low duty ratio allows a lower ripple voltage when the
current load is light, the efficiency is decreased when the output load current is large. Conversely, a high duty ratio
increases the output load current and efficiency, but increases the ripple voltage when the output load current is low.
In the A, B, and D types, the duty ratio is automatically switched 75% when the output load current is high to secure
the load drive capability and 50% when the output load current is low to control the load drive capability to decrease
pulse skipping. This suppresses a drop in the ripple frequency, enabling control of the increase in the ripple voltage.
The C type adopts a 75% fixed-duty PFM method. The ripple voltage increases more than that of the duty switching
type with the load is low, but the efficiency is better.
In the A, B, and D types, the duty ratio is not rapidly changed, but rather smoothly switched in the intermediate area
between 50% and 75%. Therefore, fluctuation of the ripple voltage caused by duty switching is minimized. Figures
15 to 16
show the ripple voltage characteristics versus the output current.
S-8351A30MC
Ta = 25
°C
S-8351A50MC
Ta = 25
°C
0
10
20
30
40
50
60
70
80
90
100
0
20
40
60
80
100
IOUT [mA]
V
rp
-p
[m
V
]
VIN
= 1.5 V
VIN
= 2 V
0
20
40
60
80
100
120
140
0 20 40 60 80 100 120140 160 180
IOUT [mA]
V
rp
-p
[m
V
]
VIN
= 2 V
VIN
= 3 V
Figure 15 Output Current (IOUT) vs. Ripple Voltage (Vrp-p)
Characteristics
Figure 16 Output Current (IOUT) vs. Ripple Voltage (Vrp-p)
Characteristics
These figures show that the ripple voltage decreases as the output load current (IOUT) changes from large to small.
The ripple voltage becomes particularly small when IOUT is in the coil current discontinuous region of 20 mA or less.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| S-8352D30MC-K8PT2G | 功能描述:DC/DC 開關控制器 Step-Up SWR PFM 100kHz 23.2uA Iq RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| S-8352D33MC-K8ST2G | 功能描述:DC/DC 開關控制器 Step-Up SWR PFM 100kHz 23.2uA Iq RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| S-8352D60MC-K9TT2U | 功能描述:IC REG CTRLR BOOST SOT23-5 制造商:ablic u.s.a. inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 輸出類型:晶體管驅動器 功能:升壓 輸出配置:正 拓撲:升壓 輸出數:1 輸出階段:1 電壓 - 電源（Vcc/Vdd）:0.9 V ~ 10 V 頻率 - 開關:100kHz 占空比（最大）:0.8 同步整流器:無 時鐘同步:無 串行接口:- 控制特性:- 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:SC-74A，SOT-753 供應商器件封裝:SOT-23-5 標準包裝:1 |
| S-8353A20MC-IQFT2G | 功能描述:直流/直流開關調節(jié)器 Step-Up SWR PWM 18.7uA Iq RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| S-8353A25MC-IQK-T2 | 功能描述:DC/DC 開關控制器 2.5V Step-Up 2.4% RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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