MIC23303 Datasheet, PDF (5/21 Pages) Micrel Semiconductor – 4MHz PWM 3A Buck Regulator with HyperLight Load™ and Power Good

Micrel, Inc.
Typical Characteristics
Efficiency vs. Load
1.8 VOUT
100
90
80
70
VIN = 3.6V
60
VIN = 5V
50
40
30
20
10
0
0.0001
L = 0.33µH
COUT = 44µF
0.001 0.01
0.1
1
10
LOAD CURRENT(A)
Current Limit vs.
Input Voltage
8.00
7.00
6.00
5.00
4.00
3.00
2.5
VOUT = 1.8V
L = 0.33µH
COUT = 44µF
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
1.15
2.5
Output Voltage vs.
Input Voltage
I_OUT=500mA
I_OUT=2A
L = 0.33µH
COUT = 44µF
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
MIC23303
Efficiency vs. Load
1.2 VOUT
100
VIN = 3V
90
80
70
VIN = 3.6V
VIN = 5V
60
50
40
30
20
10
0
0.0001
L = 0.33µH
COUT = 44µF
0.001 0.01
0.1
1
10
LOAD CURRENT (A)
1000000
100000
10000
1000
100
10
1
1000
VOUT Rise Time
vs Css
VIN=3.6V
10000
100000
CSS (pF)
1000000
30
28
26
24
22
20
18
16
14
12
10
2.5
Quiscent Current
vs. Input Voltage
TCASE = 25°C
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
1.15
2.5
Output Voltage vs.
Input Voltage
IOUT=20m A
IOUT=1m A
L = 0.33µH
COUT = 44µF
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Output Voltage (HLL) vs.
Load Current
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
1.15
0
VIN=3.6V
L = 33µH
COUT = 44µF
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
LOAD CURRENT (A)
Output Voltage (CCM) vs.
Load Current
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
1.15
0.4
VIN=3.6V
L = 33µH
COUT = 44µF
0.8 1.2 1.6 2 2.4 2.8 3.2
LOAD CURRENT (A)
September 6, 2013
5
090613-2.0