MIC2827 Datasheet, PDF (8/27 Pages) Micrel Semiconductor – Triple Output PMIC with HyperLight Load™ DCDC, two LDOs, and I2C Control

Micrel, Inc.
Typical Characteristics (continued)
LDO Current Limit
vs. Temperature
450
440
430
420
410
400
390
380
370
360
350
-40 -20
D_VIN = V_IN = 3.6V
0 20 40 60 80 100 120
TEM PERATURE (°C)
51.6
51.2
50.8
50.4
50.0
49.6
49.2
48.8
48.4
48.0
0
LDO Ground Current
vs. Load Current
D_VIN = V_IN = 3.6V
V_OUT = 1.2V
C_OUT = 1µF
25 50 75 100 125 150
LO AD CURRENT (mA)
DC-DC Efficiency VOUT=1.5V
LDO Ground Current
vs. Temperature
55
53
51
49
47
45
43
41
39
37
35
-40 -20
D_VIN = V_IN = 3.6V
V_OUT = 1.2V
C_OUT = 1µF
Load = 150mA
0 20 40 60 80 100 120
T EM PERAT URE (°C)
DC-DC Efficiency VOUT=1.0V
90
85
80 _VIN=2.7V
75
70
65
60
55
50
1
VIN=3.6V
VIN=4.2V
L = 1µH
C = 4.7µF
10
100
LO AD CURRENT (mA)
1000
DC-DC Efficiency VOUT=1.8V
90
VIN=3.6V
85 ^VIN=2.7V
80
75
70
65
60
55
50
1
VIN=4.2V
L = 1µH
C = 4.7µF
10
100
LOAD CURRENT (mA)
1000
DC-DC Switching Frequency
vs. Load Current
10
L=4.7µH
1
L=2.2µH
0.1
0.01
1
L=1µH
D_VIN = 3.6V
V_OUT = 1.8V
10
100
LOAD CURRENT (mA)
1000
100
VIN=2.7V
90
VIN=3.6V
80
VIN=4.2V
70
60
50
40
1
L = 1µH
C = 4.7µF
10
100
LOAD CURRENT (mA)
1000
DC-DC Switching Frequency
vs. Temperature
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
-40 -20
D_VIN = 3.6V
V_OUT = 1.8V
L = 1µH
C= 4.7µF
Load = 120mA
0 20 40 60 80 100 120
T EM PERAT URE (°C)
July 2009
8
MIC2827
LDO Ground Current
v s. Input Voltage
120
100
80
2 LDOs
60
40
20
0
2.7
1 LDO
V_OUT = 1.2V
C_OUT = 1µF
Load = 100µA
3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLT AGE (V)
DC-DC Efficiency VOUT=1.2V
90
VIN=3.6V
85
VIN=2.7V
80
75
70
VIN=4.2V
65
60
55
50
1
L = 1µH
C = 4.7µF
10
100
LOAD CURRENT (mA)
1000
DC-DC Switching Frequency
vs. Load Current
10
1
VIN=3.0V
0.1
VIN=3.6V
0.01
1
VIN=4.2V
V_OUT = 1.8V
L = 1µH
10
100
LOAD CURRENT (mA)
1000
DC-DC Switching Frequency
v s. Input Voltage
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
V_OUT = 1.8V
1.0
L = 1µH
0.5
C= 4.7µF
Load = 120mA
0.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLT AGE (V)
M9999-072709-A