Micrel, Inc. MIC5312
February 2005
4
M9999-021105
(408) 955-1690
Electrical Characteristics (LowQ™ Mode)
V
IN
= V
OUT
+ 1.0V for higher output of the regulator pair; LowQ™ = 0V; C
OUT
= 2.2µF, I
OUT
= 100µA; T
J
= 25°C, bold
values indicate -40°C to +125°C, unless noted.
Parameter Conditions Min Typ Max Units
Output Voltage Accuracy Variation from nominal V
OUT
-2.0
-3.0
+2.0
+3.0
%
%
Line Regulation V
IN
= V
OUT
+1V to 5.5V
0.02 0.3
0.6
%/V
Load Regulation
I
OUT
= 100µA to 10mA
0.1
0.5
%
Dropout Voltage I
OUT
= 10mA 100
200
mV
Ground Pin Current Both outputs enabled 7 10
12
µA
µA
Ground Pin Current in
Shutdown
V
EN
< 0.2V 0.01
1.0
µA
Ripple Rejection f = up to 1kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 10nF
f = 1kHz – 20kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 10nF
45
30
dB
dB
Current Limit V
OUT
= 0V (Both regulators)
40
75
150
mA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T
A
(ambient temperature) is P
D(max)
= T
J(max)
– T
A
/ θ
JA
. Exceeding the maximum
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Response time defined as the minimum hold-off time after the LowQ™ command before applying load transients.
