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参数资料
| 型号： | MIC38C45YM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK ISO 8SOIC |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 500kHz |
| 占空比： | 50% |
| 电源电压： | 7.6 V ~ 20 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC38C45YMTR MIC38C45YMTR-ND |
MIC38C42/3/4/5
Micrel, Inc.
Test
Conditions
Results
Symbol
Custom Coil 1
ETS 2
Line Regulation V IN = 26V to 80V, I O = 2A
Load Regulation V IN = 48V, I O = 0.2A to 2A
Ef?ciency V IN = 48V, I O = 2A
Output Ripple V IN = 48V, I O = 2A (20MHz BW)
Synchronous Buck Converter
0.5%
0.6%
90%
100mV
CT1 4923 ETS 92420
T1 4924 ETS 92419
L1 4925 ETS 92421
1. Custom Coils, Alcester, SD tel: (605) 934-2460
2. Energy Transformation Systems, Inc. tel: (415) 324-4949.
Refer to ?gure 2. This MIC38C43 synchronous buck converter
uses an MIC5022 half-bridge driver to alternately drive the
PWM switch MOSFET (driven by GATEH, or high-side output)
and a MOSFET which functions as a synchronous recti?er
(driven by the GATEL, or low-side output).
The low-side MOSFET turns on when the high-side MOS-
FET is off, allowing current to return from ground. Current
?ows through the low-side MOSFET in the source to drain
direction.
+12V
The on-state voltage drop of the low-side MOSFET is lower
than the forward voltage drop of an equivalent Schottky recti-
?er. This lower voltage drop results in higher ef?ciency.
A sense resistor (5mΩ) is connected to the driver ’s high-
side current sense inputs to provide overcurrent protection.
Refer to the MIC5020, MIC5021, and MIC5022 data sheets
for more information.
10K
0.15μF
0.1μF
NC
MIC5022
VDD GATEH
FL T VB
0.1μF
SMP60N06-14
5M ? 35μH
V OUT
5V, 8A
4.7NF
6.8K
2200
PF
47K
3.3K
300K
4.3K
10K
MIC38C43
COM P V R E F
FB VDD
ISNS VOUT
RT/CT GND
470μF
25V
0.1μF*
MKS2
NC
NC
EN
IN
CT
GND
GATEL
SH+
SH –
SL+
S L–
1000μF
LOW ESR
*LOCATE NEAR THE MIC38C43 SUPPLY PINS.
Figure 2. 100kHz, Synchronous Buck Converter
M9999-091107
8
September 2007
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC38C45YN | 功能描述:电流型 PWM 控制器 Monolithic SMPS Controller (Lead Free) RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MIC-38-CABLE-MF-9 | 制造商:Emulation Technology Inc 功能描述:MICTOR 38 CABLE, MALE TO FEMALE, 9 INCHES LONG |
| MIC-38-CABLE-MM-6 | 制造商:Emulation Technology Inc 功能描述:38 PIN MICTOR CABLE, MALE TO MALE. 6 INCHES LONG |
| MIC38-CABLE-MM-9 | 制造商:Emulation Technology Inc 功能描述:RIBBON CABLE, MICTOR PLG 38WAY 0.229M BLK, No. of Conductors:38, Cable Length - Imperial:9", Cable Length - Metric:228.6mm, Connector Type A:MICTOR 38 Position Plug, Connector Type B:MICTOR 38 Position Plug, Jacket Color:Black , RoHS Compliant: No |
| MIC38HC42 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:BiCMOS 1A Current-Mode PWM Controllers |
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