参数资料
| 型号： | MIC2285AYMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.5A 10TMLF |
| 标准包装： | 1 |
| 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： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 8MHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFDFN，10-TMLF? |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-TMLF?（2x2） |
| 产品目录页面： | 1093 (CN2011-ZH PDF) |
| 其它名称： | 576-2123-6 576-2123-6-ND 576-2973-6 |
MIC2285A
8MHz PWM Synchronous Buck Regulator
with LDO Standby Mode
General Description
The Micrel MIC2285A is a high efficiency 8MHz
PWM synchronous buck (step-down) regulator that
features a LOWQ ? LDO standby mode that draws
only 20μA of quiescent current. The MIC2285A
allows an ultra-low noise, small size, and high
efficiency solution for portable power applications.
In PWM mode, the MIC2285A operates with a
constant frequency 8MHz PWM control. Under light
load conditions, such as in system sleep or standby
modes, the PWM switching operation can be
disabled to reduce switching losses. In this light load
LOWQ ? mode, the LDO maintains the output voltage
and draws only 18μA of quiescent current. The LDO
mode of operation saves battery life while not
introducing spurious noise and high ripple as
experienced with pulse skipping or bursting mode
regulators.
The MIC2285A operates from 2.7V to 5.5V input and
features internal power MOSFETs that can supply
up to 600mA output current in PWM mode. It can
operate with a maximum duty cycle of 100% for use
in low-dropout conditions.
The MIC2285A is available in the 10-pin 2mm x
2mm Thin MLF ? package with a junction operating
range from –40 ° C to +125 ° C.
Data sheets and support documentation can be
found on Micrel’s web site at: www.micrel.com.
Features
? 2.7 to 5.5V supply/input voltage
? Light load LOWQ ? LDO mode
– 20μA quiescent current
– Low noise, 75μVrms
? 8MHz PWM mode
– Output current to 600mA
– >90% efficiency
– 100% maximum duty cycle
? Adjustable output voltage option down to 1V
– Fixed output voltage options available
? Ultra-fast transient response
? Requires only a 0.47μH inductor
? Enables sub 0.55mm profile solution
? Fully integrated MOSFET switches
? Micropower shutdown
? Thermal shutdown and current limit protection
? 10-pin 2mm x 2mm x 0.55mm MLF ? package
? –40 ° C to +125 ° C junction temperature range
Applications
? Cellular phones
? PDAs
? USB peripherals
____________________________________________________________________________________________________
Typical Application
2.5V OUT Efficiency
100
90
80
70
60
50
40
30
20
V IN =3.2V
V IN =3.6V
V IN =4.2V
0
Adjustable Output Buck Regulator with LOWQ ? Mode
10
0
100 200 300 400 500 600
OUTPUT CURRENT (mA)
LOWQ is a registered trademark of Micrel, Inc
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
August 2007
M9999-083107-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2285YML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:8MHz PWM Synchronous Buck Regulator with LDO Standby Mode |
| MIC2285YML TR | 功能描述:直流/直流开关调节器 8MHz Synchronous Buck Regulator - low Q Mode (Lead Free) 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 |
| MIC2285YML-TR | 功能描述:Buck Switching Regulator IC Positive Adjustable 1V 1 Output 500mA 10-VFDFN Exposed Pad, 10-MLF? 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:2.7V 电压 - 输入（最大值）:5.5V 电压 - 输出（最小值/固定）:1V 电压 - 输出（最大值）:5.5V 电流 - 输出:500mA 频率 - 开关:8MHz 同步整流器:是 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:10-VFDFN 裸露焊盘，10-MLF? 供应商器件封装:10-MLF?（3x3） 标准包装:1 |
| MIC2287 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with OVP in 2mm 】 2mm MLF⑩ and Thin SOT-23 |
| MIC2287 6-LED EV | 制造商:Micrel Inc 功能描述:BOARD EVAL MIC2287 34V OVP |
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