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参数资料
| 型号： | SI9140CY-T1-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 7/19页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 16-SOIC |
| 标准包装： | 2,500 |
| 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-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
Product is End of Life 3/2014
Si9140
Vishay Siliconix
PIN DESCRIPTION
Pin 1: VD D
The positive power supply for all functional blocks except
output driver. A bypass capacitor of 0.1 μF (minimum) is rec-
ommended.
Pin 9: ENABLE
A logic high on this pin allows normal operation. A logic low
places the chip in the standby mode. In standby mode nor-
mal operation is disabled, supply current is reduced, the
oscillator stops and D S goes high while D R goes low.
Pin 2: MON
Pin 10: R OSC
Non-inverting input of a comparator. Inverting input is tied
internally to reference voltage. This comparator is typically
used to monitor the output voltage and to flag the processor
when the output voltage falls out of regulation.
Pin 3: V GOOD
This is an open drain output. It will be held at ground when
the voltage at MON (Pin 2) is less than the internal reference.
An external pull-up resistor will pull this pin high if the MON
A resistor connected from this pin to ground sets the oscilla-
tor’s capacitor C OSC , charge and discharge current. See the
oscillator section of the description of operation.
Pin 11: C OSC
An external capacitor is connected to this pin to set the oscil-
lator frequency.
pin (Pin 2) is higher than the V REF . (Refer to Pin 2 descrip-
tion.)
f OSC
0.75
R OSC x C OSC
(at V DD = 5.0 V)
Pin 4: COMP
This pin is the output of the error amplifier. A compensation
network is connected from this pin to the FB pin to stabilize
the system. This pin drives one input of the internal pulse
width modulation comparator.
Pin 5: FB
The inverting input of the error amplifier. An external resistor
divider is connected to this pin to set the regulated output
voltage. The compensation network is also connected to this
pin.
Pin 6: NI
The non-inverting input of the error amplifier. In normal oper-
ation it is externally connected to V REF or an external refer-
ence.
Pin 7: V REF
This pin supplies a 1.5 V reference.
Pin 8: GND (Ground)
Document Number: 70026
S-40699-Rev. H, 19-Apr-04
Pin 12: UVLO SET
This pin will place the chip in the standby mode if the
UVLO SET voltage drops below 1.2 V. Once the UVLO SET
voltage exceeds 1.2 V, the chip operates normally. There is
a built-in hysteresis of 165 mV.
Pin 13: P GND
The negative return for the V S supply.
Pin 14: D S
This CMOS push-pull output pin drives the external P-Chan-
nel MOSFET. This pin will be high in the standby mode. A
break-before-make function between D S and D R is built-in.
Pin 15: D R
This CMOS push-pull output pin drives the external N-Chan-
nel MOSFET. This pin will be low in the standby mode. A
break-before-make function between the D S and D R is built-
in.
Pin 16: V S
The positive terminal of the power supply which powers the
CMOS output drivers. A bypass capacitor is required.
www.vishay.com
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相关代理商/技术参数 |
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| SI9140DQ | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:SMP Controller For High Performance Process Power Supplies |
| SI9140DQ-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 |
| SI9140DQ-T1-E3 | 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 |
| SI9140DY | 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 |
| SI9140DY-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 |
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