- 您现在的位置：买卖IC网 > PDF目录14847 > MIC4724YMME (Micrel Inc)IC REG BUCK ADJ 3A 10MSOP PDF资料下载
参数资料
| 型号： | MIC4724YMME |
| 厂商： | Micrel Inc |
| 文件页数： | 8/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3A 10MSOP |
| 标准包装： | 100 |
| 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 ~ 6 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： | 管件 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
| 产品目录页面： | 1093 (CN2011-ZH PDF) |
| 其它名称： | 576-3120-5 |
V OUT = V REF × ?
+ 1 ?
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
3.0V to 6.0V. 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 MIC4724. 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:
? R1 ?
? R2 ?
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:
MIC4724
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
ground should be separate from the power ground
(PGND) loop. Refer to the layout considerations for more
details.
C FF =
1
2 π × R1 × 200kHz
June 2008
8
M9999-062408-A
相关PDF资料 |
PDF描述 |
|---|---|
| MIC4684YM | IC REG BUCK ADJ 2A 8SOIC |
| LGU2F221MELA | CAP ALUM 220UF 315V 20% SNAP |
| LM2575-12YN | IC REG BUCK 12V 1A 16DIP |
| LM2576-12WU | IC REG BUCK 12V 3A TO263-5 |
| PM2110-6R8M | INDUCTOR TOROID 6.8UH 20% SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MIC47300WD TR | 功能描述:低压差稳压器 - LDO 3A Low Voltage, ADJ. High Bandwidth LDO Regulator with Dual Input Supplies RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MIC47300WD-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output Adj to 0.9V 3A TO-252-5 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 稳压器拓扑:正，可调式 电压 - 输出:可调至 0.9V 电流 - 输出:3A 电压 - 跌落（典型值）:0.23V @ 3A 稳压器数:1 电压 - 输入:1.4 V ~ 6.5 V 电流 - 限制（最小值）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-252-6，DPak（5 引线 + 接片） 供应商器件封装:TO-252-5 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。