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MIC2951-03YMM 参数 Datasheet PDF下载

MIC2951-03YMM图片预览
型号: MIC2951-03YMM
PDF下载: 下载PDF文件 查看货源
内容描述: [FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6V DROPOUT, PDSO8]
分类和应用: 光电二极管输出元件调节器
文件页数/大小: 20 页 / 1060 K
品牌: MICROCHIP [ MICROCHIP ]
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Micrel, Inc.  
MIC2950/2951  
Parameter  
Condition  
Min  
2.0  
2.0  
2.0  
2.0  
Typ  
Max  
Units  
Shutdown Input Logic Voltage  
MIC295x-02/-05 (±0.5%)  
Low  
High  
1.3  
V
V
V
0.7  
0.7  
0.7  
0.7  
MIC295x-03/-06 (±1%)  
Low  
High  
1.3  
1.3  
1.3  
V
V
V
MIC2951-3.3 (±1%)  
Low  
High  
V
V
V
MIC2951-4.8 (±1%)  
Low  
High  
V
V
V
Shutdown Input Current  
VSHUTDOWN = 2.4V  
VSHUTDOWN = 30V  
Note 7  
30  
450  
3
50  
100  
µA  
µA  
600  
750  
µA  
µA  
Regulator Output Current  
in Shutdown  
10  
20  
µA  
µA  
Notes:  
1. Exceeding the absolute maximum rating may damage the device.  
2. The device is not guaranteed to function outside its operating rating.  
3. Devices are ESD sensitive. Handling precautions are recommended.  
4. The junction-to-ambient thermal resistance of the TO-92 package is 180°C/W with 0.4” leads and 160°C/W with 0.25” leads to a PC board. The  
thermal resistance of the 8-pin DIP package is 105°C/W junction-to-ambient when soldered directly to a PC board. Junction-to-ambient thermal  
resistance for the SOIC (M) package is 160°C/W. Junction-to-ambient thermal resistance for the MM8™ (MM) is 250°C/W.  
5. The maximum positive supply voltage of 60V must be of limited duration (100ms) and duty cycle (1%). The maximum continuous supply voltage  
is 30V.  
6. When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-clamped  
to ground.  
7.  
VSHDN 2V, VIN 30V, VOUT = 0, with the FB pin connected to TAP.  
8. Additional conditions for 8-pin devices are VFB = 5V, TAP and OUT connected to SNS (VOUT = 5V) and VSHDN 0.8V.  
9. Output or reference voltage temperature coefcient is dened as the worst case voltage change divided by the total temperature range.  
10. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating  
effects are covered in the specication for thermal regulation.  
11. Line regulation for the MIC2951 is tested at 150°C for IL = 1mA. For IL = 100µA and TJ = 125°C, line regulation is guaranteed by design to 0.2%.  
See Typical Performance Characteristics for line regulation versus temperature and load current.  
12. Dropout voltage is dened as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V  
differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into  
account.  
13. Thermal regulation is dened as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line  
regulation effects. Specications are for a 50mA load pulse at VIN = 30V (1.25W pulse) for t = 10ms.  
14. VREF VOUT (VIN – 1 V), 2.3V VIN 30V, 100µA < IL 150mA, TJ TJMAX  
.
15. Comparator thresholds are expressed in terms of a voltage differential at the FB terminal below the nominal reference voltage measured at 6V input.  
To express these thresholds in terms of output voltage change, multiply by the error amplier gain = VOUT /VREF = (R1 + R2)/R2. For example, at a  
programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV x 5V/1.235V = 384mV. Thresholds  
remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.  
16. Specication for packaged product only.  
M9999-021610  
February 2010  
7