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| 型号： | SI9140CQ-T1-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 13/19页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 16-TSSOP |
| 标准包装： | 3,000 |
| PWM 型： | 电流/电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 2MHz |
| 电源电压： | 3 V ~ 6.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
Product is End of Life 3/2014
Si9140
Vishay Siliconix
For these reasons, synchronous rectification is a must in
today’s microprocessors power supply design. Pulseskip-
ping modes are undesirable in high-performance micropro-
cessor power supplies, especially when the minimum load
current is as high as 500 mA. This pulse-skipping mode dis-
ables the synchronous rectification during light load and gen-
erates a random noise spectrum which may produce EMI
problems.
Siliconix’ TrenchFET TM technology has resulted in 20 m Ω N-
Channel (Si4410DY) and 35 m Ω P-Channel (Si4435DY)
MOSFETs in the SO-8 surface-mount package. These LIT-
TLE FOOT ? products totally eliminate the need for an exter-
Worst case current of 10 A can be handled with two paral-
leled Si4435DY and two paralleled Si4410DY MOSFETs,
which results in the efficiency levels shown in Figure 9.
100
V IN = 5 V
V OUT = 2.9 V
95
nal heatsink.
90
85
Phase
80
0
2
4
6
8
10
I OUT (A)
Figure 9. Efficiency
Gain
Frequency (Hz)
Figure 8. Non-Synchronous Converter BW
Good electrical designs must provide an adequate margin for
the specification, but they should not be grossly overde-
signed to lower costs. LITTLE FOOT power MOSFETs allow
designers to balance cost and performance considerations
without sacrificing either. If the design requires only an 8.5 A
continuous current, for example, one Si4410DY can be elim-
inated. Table 2 shows the number of MOSFETs required to
handle the various output current levels of today’s highper-
formance microprocessors. For other output power levels,
the equations below should be used to calculate the power
handling capability of the MOSFET.
TABLE 2.
CONVERTER REQUIREMENTS (FIGURES 1, 2, AND 3)
I O (A)
Maximum
5A
8.5 A
10 A
14.5 A
Document Number: 70026
S-40699-Rev. H, 19-Apr-04
Quantity High-Side P-Channel
Si4435DY
1
2
2
3
Quantity Low-Side N-Channel
Si4410DY
1
1
2
2
Quantity Input (C1-C3)
Capacitor Os-con 220 μF
1
2
2
3
www.vishay.com
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相关代理商/技术参数 |
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|---|---|
| SI9140CY | 功能描述:电压模式 PWM 控制器 SMP Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| SI9140CY-E3 | 功能描述:电压模式 PWM 控制器 Switching Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| SI9140CY-T1 | 功能描述:电压模式 PWM 控制器 Switching Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| SI9140CY-T1-E3 | 功能描述:电压模式 PWM 控制器 Switching Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| SI9140DQ | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:SMP Controller For High Performance Process Power Supplies |
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