參數(shù)資料
型號： S-8351A28MC-J2NT2G
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDSO5
封裝： LEAD FREE, SOT-23, 5 PIN
文件頁數(shù)： 7/50頁
文件大小： 630K
代理商： S-8351A28MC-J2NT2G
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.2.4_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, 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
[mV]
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
[mV]
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.
相關(guān)PDF資料
PDF描述
S-93C56ADFJ 128 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8
S-93C56BD0I-I8T1G 128 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8
S-I6117#01 6A, 250VAC, FEMALE AND MALE, MAINS POWER CONNECTOR
S-T111B23MC-OGI-TF 2.3 V FIXED POSITIVE LDO REGULATOR, PDSO5
S02-BDS-3-B(LF)(SN) 2 CONTACT(S), MALE, RIGHT ANGLE TWO PART BOARD CONNECTOR, SOLDER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-8351A30MC-J2P-T2 功能描述:DC/DC 開關(guān)控制器 3.0V Step-Up 2.4% RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
S-8351A30MC-J2PT2G 功能描述:DC/DC 開關(guān)控制器 3.0V Step-Up 2.4% RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
S-8351A30MC-J2PT2U 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 功能:升壓 輸出配置:正 拓?fù)?升壓 輸出類型:固定 輸出數(shù):1 電壓 - 輸入（最小值）:0.9V 電壓 - 輸入（最大值）:10V 電壓 - 輸出（最小值/固定）:3V 電壓 - 輸出（最大值）:- 電流 - 輸出:300mA（開關(guān)） 頻率 - 開關(guān):100kHz 同步整流器:無 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商器件封裝:SOT-23-5 標(biāo)準(zhǔn)包裝:1
S-8351A33MC-J2S-T2 功能描述:DC/DC 開關(guān)控制器 3.3V Step-Up 2.4% RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
S-8351A33MC-J2ST2G 功能描述:DC/DC 開關(guān)控制器 3.3V Step-Up 2.4% RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*