MIC2954 Datasheet, PDF (4/12 Pages) Micrel Semiconductor – 250mA Low-Dropout Regulator

MIC2954
Micrel
Symbol
∆V_OUT/∆P_D
e_n
Parameter
Thermal Regulation, Note 12
Output Noise Voltage
(10Hz to 100kHz)
Reference Voltage
Conditions
I_L = 100mA, C_L = 2.2µF
I_L = 100mA, C_L = 33µF
MIC2954-02/-07 (±0.5%)
MIC2954-03/-08 (±1%)
Reference Voltage
Feedback Pin Bias Current
MIC2954-02/-07 (±0.5%), Note 13
MIC2954-03/-08 (±1%), Note 13
Reference Voltage
Temperature Coefficient, Note 12
Feedback Pin Bias Current
Temperature Coefficient
Error Comparator
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
MIC2954-02/-07 (±0.5%)
MIC2954-03/-08 (±1%)
V_OH = 30V
V_IN = 4.5V, I_OL = 400µA
Note 14
Lower Threshold Voltage
Note 14
Hysteresis
Shutdown Input
Input Logic Voltage
Shutdown Pin Input Current
Regular Output Current in
Shutdown
Note 14
low (on)
high (off)
V_SHDN = 2.4V
V_SHDN = 30V
Note 15
Min
1.220
1.200
1.210
1.200
1.190
1.185
Typ
0.05
400
260
1.235
1.235
20
20
50
0.1
Max Units
0.2 %/W
µV(rms)
µV(rms)
1.250 V
1.260 V
1.260 V
1.270 V
1.270 V
1.285 V
40
nA
60
nA
ppm/°C
ppm/°C
40 nA/°C
0.01 1.00 µA
2.00 µA
150 250 mV
400 mV
60
40
mV
25
mV
75
95
mV
140 mV
15
mV
1.3
0.7
V
2.0
V
30
50
µA
100
µA
450 600
µA
750
µA
3
10
µA
20
µA
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.
Note 5.
P_D(max) = (T_J(max) – T_A) ÷ θ_JC. Exceeding T_J(max) will cause thermal shutdown.
Thermal resistance (θ_JC) of the TO-220 package is 2.5°C/W, and 15°C/W for the SOT-223. Thermal resistance (θ_JC) of the TO-92 package is
180°C/W with 0.4" leads and 160°C/W with 0.25" leads. Thermal resistance (θ_JA) of the SOP-8 is 160°C/W mounted on a printed circuit board
(See “Application Information: Thermal Calculation”).
Note 6. Output voltage temperature coefficient is defined as the worst case voltage change divide by the total temperature range.
Note 7. Line regulation for the MIC2954 is tested at 125°C for I_L = 1mA. For I_L = 100µA and T_J = 125°C, line regulation is guaranteed by design to
0.2%. See “Typical Characteristics” for line regulation versus temperature and load current.
Note 8. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to heating effects
are covered by the thermal regulation specification.
Note 9. Dropout Voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V
differential. At very low values of programmed output voltage, the minimum input supply voltage of 2 V (2.3V over temperature) must be taken
into account.
Note 10. Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the ground
pin current.
MIC2954
4
August 1999