contact-fact Micrel Semiconductor, contact-fact Datasheet - Page 6

• Manufacturer Part Number: contact-fact
• Description: Mic2950/mic2951 150ma Low-dropout Voltage Regulator
• Manufacturer: Micrel Semiconductor

MIC2950/2951
MIC2950/2951
Parameter
Shutdown Input Logic Voltage
Shutdown Input Current
Regulator Output Current
in Shutdown
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Note 8.
Note 9.
Note 10. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating
Note 11. Line regulation for the MIC2951 is tested at 150°C for I
Note 12. Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V
Note 13. Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line
Note 14. V
Note 15. Comparator thresholds are expressed in terms of a voltage differential at the FB terminal below the nominal reference voltage measured at 6V
Note 16. Specification for packaged product only.
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 are recommended.
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.
The maximum positive supply voltage of 60V must be of limited duration (≤100ms) and duty cycle (≤1%). The maximum continuous supply
voltage is 30V.
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.
V
Additional conditions for 8-pin devices are V
Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
effects are covered in the specification for thermal regulation.
0.2%. See Typical Performance Characteristics for line regulation versus temperature and load current.
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.
regulation effects. Specifications are for a 50mA load pulse at V
input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V
(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 V
cally 5% below nominal, 7.5% guaranteed.
SHDN
REF
≤ V
≥ 2V, V
OUT
≤ (V
IN
≤ 30 V, V
IN
– 1 V), 2.3V ≤ V
OUT
= 0, with the FB pin connected to TAP.
Condition
MIC295x-02/-05 (±0.5%)
MIC295x-03/-06 (±1%)
MIC2951-3.3 (±1%)
MIC2951-4.8 (±1%)
V
V
Note 7
SHUTDOWN
SHUTDOWN
Low
High
Low
High
Low
High
Low
High
IN
≤ 30V, 100µA < I
= 2.4V
= 30V
FB
= 5V, TAP and OUT connected to SNS (V
L
≤ 150mA, T
L
= 1mA. For I
IN
J
6
= 30V (1.25W pulse) for t = 10ms.
≤ T
L
JMAX
= 100µA and T
.
OUT
as V
OUT
J
= 125°C, line regulation is guaranteed by design to
is varied, with the dropout warning occurring at typi-
OUT
= 5V) and V
SHDN
Min
2.0
2.0
2.0
2.0
≤ 0.8V.
OUT
/V
REF
Typ
450
1.3
1.3
1.3
1.3
30
3
=
Max
100
600
750
0.7
0.7
0.7
0.7
50
10
20
Micrel, Inc.
July 2005
Units
µA
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V