MIC2954
Symbol
∆V
OUT
/∆P
D
e
n
Parameter
Thermal Regulation,
Note 12
Output Noise Voltage
(10Hz to 100kHz)
Reference Voltage
I
L
= 100mA, C
L
= 2.2µF
I
L
= 100mA, C
L
= 33µF
MIC2954-02/-07 (±0.5%)
MIC2954-03/-08 (±1%)
Reference Voltage
MIC2954-02/-07 (±0.5%),
Note 13
MIC2954-03/-08 (±1%),
Note 13
Feedback Pin Bias Current
Reference Voltage
Temperature Coefficient,
Note 12
Feedback Pin Bias Current
Temperature Coefficient
Error Comparator
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Shutdown Input
Input Logic Voltage
low (on)
high (off)
Shutdown Pin Input Current
V
SHDN
= 2.4V
V
SHDN
= 30V
Regular Output Current in
Shutdown
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Micrel
Conditions
Min
Typ
0.05
400
260
1.220
1.200
1.210
1.200
1.190
1.185
20
MIC2954-02/-07 (±0.5%)
MIC2954-03/-08 (±1%)
20
50
0.1
40
1.235
1.235
1.250
1.260
1.260
1.270
1.270
1.285
40
60
Max
0.2
Units
%/W
µV(rms)
µV(rms)
V
V
V
V
V
V
nA
nA
ppm/°C
ppm/°C
nA/°C
V
OH
= 30V
V
IN
= 4.5V, I
OL
= 400µA
Note 14
Note 14
Note 14
0.01
150
60
75
15
1.00
2.00
250
400
40
25
95
140
µA
µA
mV
mV
mV
mV
mV
mV
mV
1.3
2.0
30
450
3
0.7
V
V
µA
µA
µA
µA
µA
µA
50
100
600
750
10
20
Note 15
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.
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”).
Output voltage temperature coefficient is defined as the worst case voltage change divide by the total temperature range.
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.
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.
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 6.
Note 7.
Note 8.
Note 9.
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
MICREL [ MICREL SEMICONDUCTOR ]
