参数资料
| 型号： | MIC2198BML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 13/14页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 12-MLF |
| 标准包装： | 5,000 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 550kHz |
| 占空比： | 76% |
| 电源电压： | 4.5 V ~ 32 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： | -40°C ~ 125°C |
| 封装/外壳： | 12-VFDFN 裸露焊盘，12-MLF? |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC2198BMLTR MIC2198BMLTR-ND |
MIC2198
PCB Layout and Checklist
PCB layout is critical to achieve reliable, stable and ef?cient
performance. A ground plane is required to control EMI and
minimize the inductance in power, signal and return paths.
The following guidelines should be followed to insure proper
operation of the circuit.
? Signal and power grounds should be kept separate
and connected at only one location. Large currents
or high di/dt signals that occur when the MOSFETs
turn on and off must be kept away from the small
signal connections.
? The connection between the current-sense resis-
tor and the MIC2198 current-sense inputs (pin 4
and 5) should have separate traces, through a
10Ω resistor on each pin. The traces should be
routed as closely as possible to each other and
their length should be minimized. Avoid running
the traces under the inductor and other switching
components. The 10Ω resistor should be placed
close as possible to pins 4 and 5 on the MIC2198
and a 1nF to 0.1μF capacitor placed between pins
4 and 5 will help attenuate switching noise on the
current sense traces. This capacitor should be
placed close to pins 4 and 5.
? When the high-side MOSFET is switched on, the
critical ?ow of current is from the input capacitor
through the MOSFET, inductor, sense resistor,
output capacitor, and back to the input capacitor.
These paths must be made with short, wide pieces
of trace. It is good practice to locate the ground
terminals of the input and output capacitors close
to each.
Micrel, Inc.
? When the low-side MOSFET is switched on, cur-
rent ?ows through the inductor, sense resistor,
output capacitor, and MOSFET. The source of the
low-side MOSFET should be located close to the
output capacitor.
? The freewheeling diode, D1 in Figure 2, conducts
current during the dead time, when both MOSFETs
are off. The anode of the diode should be located
close to the output capacitor ground terminal and
the cathode should be located close to the input
side of the inductor.
? The 4.7μF capacitor, which connects to the V DD
terminal (pin 7) must be located right at the IC. The
V DD terminal is very noise sensitive and placement
of this capacitor is very critical. Connections must
be made with wide trace. The capacitor may be
located on the bottom layer of the board and con-
nected to the IC with multiple vias.
? The V IN bypass capacitor should be located close
to the IC and connected between pins 6 and 9.
Connections should be made with a ground and
power plane or with short, wide trace.
October 2005
13
MIC2198
相关PDF资料 |
PDF描述 |
|---|---|
| MIC2199BML TR | IC REG CTRLR BUCK PWM CM 12-MLF |
| MIC2202BMM TR | IC REG BUCK ADJ 0.6A 10MSOP |
| MIC2203BMM TR | IC REG BUCK ADJ 0.3A 10MSOP |
| MIC2204BMM TR | IC REG BUCK SYNC ADJ 0.6A 10MSOP |
| MIC2205-1.58YML TR | IC REG BUCK SYNC 1.58V .6A 10MLF |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2198YML | 功能描述:DC/DC 开关控制器 500KHz 12 Lead Sync Buck Controller - Lead Free RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2198YML TR | 功能描述:DC/DC 开关控制器 500KHz 12 Lead Sync Buck Controller (Lead Free) RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2198YMLTR | 制造商:Micrel 功能描述:DC-DC Controller Sync Buck 4.5V to 32V |
| MIC2198YML-TR | 功能描述:Buck Regulator Positive Output Step-Down DC-DC Controller IC 12-MLF? (4x4) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 输出类型:晶体管驱动器 功能:降压 输出配置:正 拓扑:降压 输出数:1 输出阶段:1 电压 - 电源（Vcc/Vdd）:4.5 V ~ 32 V 频率 - 开关:500kHz 占空比（最大）:0.76 同步整流器:是 时钟同步:无 串行接口:- 控制特性:使能 工作温度:-40°C ~ 125°C （TJ） 封装/外壳:12-VFDFN 裸焊盘，12-MLF? 供应商器件封装:12-MLF?（4x4） 标准包装:1 |
| MIC2199 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:300kHz 4mm 】 4mm Synchronous Buck Converter |
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