- 您现在的位置：买卖IC网 > PDF目录14160 > MIC4723YMME TR (Micrel Inc)IC REG BUCK ADJ 3A 10MSOP PDF资料下载
参数资料
| 型号： | MIC4723YMME TR |
| 厂商： | Micrel Inc |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3A 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 1V |
| 输入电压： | 3 V ~ 5.5 V |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
Micrel, Inc.
Pin Description
VIN
Two pins for VIN provide power to the source of the
internal P-channel MOSFET along with the current
limiting sensing. The VIN operating voltage range is from
2.7V to 5.5V for the MIC4723YML or 3.0V to 5.5V for the
MIC4723YMME. Due to the high switching speeds, a
10μF capacitor is recommended close to VIN and the
power ground (PGND) for each pin for bypassing.
Please refer to layout recommendations.
BIAS
The bias (BIAS) provides power to the internal reference
and control sections of the MIC4723. A 10 ? resistor
from VIN to BIAS and a 0.1μF from BIAS to SGND is
required for clean operation.
EN
The enable pin provides a logic level control of the
output. In the off state, supply current of the device is
greatly reduced (typically <1μA). Do not drive the enable
pin above the supply voltage.
FB
The feedback pin (FB) provides the control path to
control the output. For adjustable versions, a resistor
divider connecting the feedback to the output is used to
adjust the desired output voltage. The output voltage is
calculated as follows:
MIC4723
SW
The switch (SW) pin connects directly to the inductor
and provides the switching current necessary to operate
in PWM mode. Due to the high speed switching on this
pin, the switch node should be routed away from
sensitive nodes. This pin also connects to the cathode of
the free-wheeling diode.
PGOOD
Power good is an open drain pull down that indicates
when the output voltage has reached regulation. When
power good is low, then the output voltage is within
±10% of the set regulation voltage. For output voltages
greater or less than 10%, the PGOOD pin is high. This
should be connected to the input supply through a pull
up resistor. A delay can be added by placing a capacitor
from PGOOD to ground.
PGND
Power ground (PGND) is the ground path for the
MOSFET drive current. The current loop for the power
ground should be as small as possible and separate
from the Signal ground (SGND) loop. Refer to the layout
considerations for more details.
SGND
Signal ground (SGND) is the ground path for the biasing
and control circuitry. The current loop for the signal
V OUT = V REF × ?
+ 1 ?
? R1
? R2
?
?
ground should be separate from the power ground
(PGND) loop. Refer to the layout considerations for more
details.
where V REF is equal to 1.0V.
A feedforward capacitor is recommended for most
designs using the adjustable output voltage option. To
reduce current draw, a 10K feedback resistor is
recommended from the output to the FB pin (R1). Also, a
feedforward capacitor should be connected between the
output and feedback (across R1). The large resistor
value and the parasitic capacitance of the FB pin can
cause a high frequency pole that can reduce the overall
system phase margin. By placing a feedforward
capacitor, these effects can be significantly reduced.
Feedforward capacitance (C FF ) can be calculated as
follows:
C FF =
1
2 π × R1 × 200kHz
June 2008
8
M9999-060308-E
相关PDF资料 |
PDF描述 |
|---|---|
| 13R103C | INDUCTOR RADIAL 10UH 3A |
| GSC40DRXH | CONN EDGECARD 80POS DIP .100 SLD |
| MAX6866UK36D1L+T | IC MPU SUPERVISOR SOT23-5 |
| FMC05DRYI | CONN EDGECARD 10POS DIP .100 SLD |
| MAX6866UK36D1S+T | IC MPU SUPERVISOR SOT23-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4724 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3A 2MHz Integrated Switch Buck Regulator with 6Vmax Input |
| MIC4724YMME | 功能描述:直流/直流开关调节器 3A 2MHz Buck Regulator in Epad MSOP-10 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC4724YMME TR | 功能描述:直流/直流开关调节器 3A 2MHz Buck Regulator in Epad MSOP-10 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC47300 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3A, Low Voltage, Adjustable LDO Regulator with Dual Input Supply |
| MIC47300WD | 制造商:Micrel 功能描述:Micrel MIC47300WD, Low-Dropout (LDO) Voltage Regulators |
发布紧急采购，3分钟左右您将得到回复。