参数资料
| 型号： | MIC4744YTSE TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/23页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A DL 16TSSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 可调至 0.6V |
| 输入电压： | 2.9 V ~ 5.5 V |
| 频率 - 开关： | 4MHz |
| 电流 - 输出： | 2A |
| 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： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-EPAD TSSOP |
MIC4744
4 MHz Dual 2A Integrated Switch
Buck Regulator
General Description
Features
The Micrel MIC4744 is a high efficiency dual PWM buck
(step-down) regulator that provides dual 2A current output.
The MIC4744 operates at 4MHz. A proprietary internal
compensation technique allows a closed loop bandwidth of
over 200kHz.
The low on-resistance internal P-Channel MOSFET of the
MIC4744 allows efficiencies over 90%, reduces external
components count and eliminates the need for an
expensive current sense resistor.
The MIC4744 operates from 2.9V to 5.5V input and the
output can be adjusted down to 0.6V. The device can
operate with a maximum duty cycle of 100% for use in low-
dropout conditions.
The MIC4744 is available in the exposed pad 16-pin
3mm x 3mm MLF ? and ETSSOP-16 packages with
junction operating temperature ranging from –40°C to
+125°C.
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2.9 to 5.5V supply voltage
4MHz PWM mode
2A Dual output
Greater than 90% efficiency
100% maximum duty cycle
Output voltage adjustable down to 0.6V
Ultra-fast transient response
Ultra-small external components
Stable with a 0.47μH inductor and a 10μF output
capacitor
Fully integrated 2A MOSFET switches
Micro-power shutdown
Thermal shutdown and current limit protection
Available in 3mm x 3mm 16-pin MLF ? and 16-pin
TSSOP packages
–40 ° C to +125 ° C junction temperature range
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Applications
? Broadband: xDSL modems
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Automotive satellite radios
HD STB, DVD/TV recorder
Computer peripherals: printers and graphic cards
FPGA/ASIC
General point of load
Typical Application
5.0Vin 3.3Vout Efficiency
100
98
96
94
92
90
88
86
84
82
80
0.0
0.4
0.8
1.2
1.6
2.0
OUTPUT CURRENT (A)
2A 4MHz Dual Buck Regulator
MLF and Micro LeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
March 2009
1
M9999-030209-C
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| MIC4782YML-TR | 功能描述:Buck Switching Regulator IC Positive Adjustable 0.6V 2 Output 2A 16-VFQFN Exposed Pad, 16-MLF? 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:2 电压 - 输入（最小值）:3V 电压 - 输入（最大值）:6V 电压 - 输出（最小值/固定）:0.6V 电压 - 输出（最大值）:6V 电流 - 输出:2A 频率 - 开关:1.8MHz 同步整流器:无 工作温度:-20°C ~ 125°C（TJ） 安装类型:表面贴装 封装/外壳:16-VFQFN 裸露焊盘，16-MLF? 供应商器件封装:16-MLF?（4x4） 标准包装:1 |
| MIC4801 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High Efficiency 600mA Single Channel Linear WLED Driver with Ultra Fast PWM? Control |
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