MIC49300 查看數據表（PDF） - Micrel
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MIC49300 Datasheet PDF : 8 Pages
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MIC49300
Absolute Maximum Ratings (Note 1)
Supply Voltage (VIN)........................................................ 8V
Bias Supply Voltage (VBIAS) ............................................ 8V
Enable Input Voltage (VEN) ............................................. 8V
Power Dissipation..................................... Internally Limited
ESD Rating, Note 3 ...................................................... 2kV
Micrel, Inc.
Operating Ratings (Note 2)
Supply Voltage (VIN).........................................1.4V to 6.5V
Bias Supply Voltage (VBIAS) ................................3V to 6.5V
Enable Input Voltage (VEN) ............................... 0V to VBIAS
Junction Temperature Range ..............–40°C ≤TJ ≤ +125°C
Package Thermal Resistance
S-PAK(θJC) ........................................................... 2°C/W
Electrical Characteristics
TA = 25°C with VBIAS = VOUT +2.1V; VIN = VOUT + 1V; bold values indicate –40°C < TJ < +125°C, Note 4; unless otherwise specified.
Parameter
Conditions
Min Typ Max Units
Output Voltage Accuracy
At 25°C, fixed voltage options
Over temperature range
–1
+1
%
–2
+2
%
Line Regulation
Load Regulation
Dropout Voltage (VIN – VOUT)
Dropout Voltage (VBIAS – VOUT)
Note 4
VIN = 2.0V to 6.5V
IL = 0mA to 3A
IL = 1.5A
IL = 3A
IL = 3A
–0.1 0.01 +0.1 %/V
0.2
0.5
%
125 200 mV
280 400 mV
1.5
2.1
V
Ground Pin Current, Note 5
Ground Pin Current in Shutdown
Current thru VBIAS
Current Limit
Enable Input, Note 6
IL = 0mA
IL = 3A
VEN ≤ 0.6V, (IBIAS + ICC), Note 6
IL = 0mA
IL = 3A
VOUT = 0V
25
mA
25
50
mA
0.07
5
µA
20
35
mA
50
150
mA
6.5
9
A
Enable Input Threshold
(Fixed Voltage only)
Regulator enable
Regulator shutdown
1.6
V
0.6
V
Enable Pin Input Current
0.1
1.0
µA
Reference
Reference Voltage
Adjustable option only
0.891 0.9 0.909 V
0.882
0.918 V
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
For VOUT ≤1V, VBIAS dropout specification does not apply due to a minimum 3V VBIAS input.
IGND = IBIAS + (IIN – IOUT). At high loads, input current on VIN will be less than the output current, due to drive current being supplied by VBIAS.
Fixed output voltage versions only.
August 2005
3
M9999-082605-B
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