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MIC5270_05 Datasheet, PDF (3/8 Pages) Micrel Semiconductor – μCap Negative Low-Dropout Regulator | |||
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MIC5270
Absolute Maximum Ratings (Note 1)
Input Voltage (VIN) ....................................... â20V to +0.3V
Power Dissipation (PD) ............................ Internally Limited
Junction Temperature (TJ) ....................... â40°C to +125°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
Storage Temperature (TS) ....................... â65°C to +150°C
ESD Rating, Note 3
Micrel, Inc.
Operating Ratings (Note 2)
Input Voltage (VIN) ....................................... â16V to â3.3V
Junction Temperature (TJ) ....................... â40°C to +125°C
Thermal Resistance (θJA) ........................................ Note 4
Electrical Characteristics (Note 5)
VIN = VOUT â 1.0V; COUT = 4.7µF, IOUT = 100µA; TJ = 25°C, bold values indicate â40°C ⤠TJ ⤠+125°C; unless noted.
Symbol
Parameter
Condition
Min Typ Max
Units
VOUT
Output Voltage Accuracy
Variation from nominal VOUT
â2
2
%
â3
3
%
âVOUT/âT
Output Voltage Temperature
Coefficient
Note 6
100
ppm/°C
âVOUT/VOUT Line Regulation
VIN = VOUT â 1V to â16V
0.05 0.15 %/V
0.2
âVOUT/VOUT Load Regulation
IOUT = 100µA to 100mA, Note 7
1.5
1.8
%
2.0
%
VIN â VOUT Dropout Voltage, Note 8
IOUT = 100µA
IOUT = 50mA
IOUT = 100mA
40
mV
360 500 mV
500 700 mV
900
IGND
Ground Current, Note 9
PSRR
Ripple Rejection
IOUT = 100µA
IOUT = 50mA
IOUT = 100mA
f = 120Hz
35
100
µA
0.7
mA
2.1
3.0
mA
50
dB
ILIMIT
âVOUT/âPD
Current Limit
Thermal Regulation
VOUT = 0V
Note 10
160 300 mA
0.05
%/W
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended.
Note 4.
The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max), the junction-to-ambient thermal
resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
PD(max) = (TJ(max) â TA) ÷ θJA, where θJA is 235°C/W. Exceeding the maximum allowable power dissipation will result in excessive die
temperature, and the regulator will go into thermal shutdown. See the âThermal Considerationsâ section for details.
Note 5. Specification for packaged product only.
Note 6. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 7. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load
range from 100µA to 100mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
Note 8. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V
differential.
Note 9. Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of
the load current plus the ground pin current.
Note 10. Thermal regulation is defined as the change in output voltage at a time âtâ after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 100mA load pulse at VIN = â16V for t = 10ms.
May 2005
3
M9999-052705
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