MIC5312 Datasheet, PDF (5/11 Pages) Micrel Semiconductor – LowQ Mode Dual 300mA LDO with Integrated POR

Micrel, Inc.
Typical Characteristics
Ripple Rejection
vs. I_LOAD (Normal Mode)
90
80
70
60
50
50mA
40
30 ^VOUT^=1.85V
150mA
20 ^VIN=VOUT+1V
C =2.2µF
10
O UT
C=
10nF
0 ^BYP
300mA
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Dropout Characteristics
3
2.5 ^100mA
2
150mA
300mA
1.5
1
0.5
V_OUT=2.6V
00 _{1 2 3 4 5 6}
SUPPLY VOLTAGE (V)
Ground Current
vs. Supply Voltage
35
300mA
30
25
100mA
150mA
20
15
10
10mA LowQ™
5
10.3 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
SUPPLY VOLTAGE (V)
Output Noise
Spectral Density
1
0.1
0.01 ^{VIN = 4.45V}
C_OUT = 2.2 µF
C_BYP = 0.01µF
V_OUT = 1.8V
0.001 ^ROUT
10 100 1k 10k 100k 1M ^10M
FREQUENCY (Hz)
February 2005
Ripple Rejection
LowQ Mode
90
80
70
60
50
40
30 ^VOUT^=1.85V
20
V_{I N}=V_{O U T}+1V
I =10mA
10
L OA D
C=
2.2
µF
Ceramic
O UT
0
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Dropout vs.
Temperature (Normal Mode)
160
140
300mA
120
100
80
150mA
60
40
50mA
20
-040 -20 0 20 40 60 80 100 120
Ground Current
vs. Temperature
35
300mA
30
50mA
25
100mA
150mA
20
15
10
5
-040 -20 0 20 40 60 80 100 120
5
MIC5312
Output Voltage
vs. Temperature
2.7
2.65
2.6
2.55
2.5
2.45
2.4
2.35
100µA
2.30 _{25 50 75 100 125}
Dropout vs.
Temperature (LowQ Mode)
140
120
10mA
100
80
6mA
60
40
3mA
20
-040 -20 0 20 40 60 80 100 120
Ground Current
vs. Temperature (LowQ Mode)
9
8
10mA
7
100µA
6
5
4
3
2
1
-040 -20 0 20 40 60 80 100 120
M9999-021105
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