MIC4721 Datasheet, PDF (5/19 Pages) Micrel Semiconductor – 1.5A 2MHz Integrated Switch Buck Regulator

Micrel, Inc.
Typical Characteristics
Load Regulation
0.02
0.00
-0.02
-0.04
-0.06
-0.08
V_O = 1.8V
-0.100V^IN
=
3.3V
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
1.002
Reference Voltage
vs. Input Voltage
1.001
1.000
0.999
0.998
0.997
0.996
0.995
2.5 3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
Quiescent Current
vs. Temperature
3.5
3.0
2.5
2.0
V_IN = 2.5V
1.5
1.0
V_IN = 3.3V
0.5
0
20 40 60 80
TEMPERATURE (°C)
Switch On-Resistance
vs. Input Voltage
180
170
160
R_ON @ I_OUT = 1.5A
150
140
130
120 ^{RON @ IOUT = 0.1A}
110
1020.5 _{3 3.5 4 4.5 5 5.5 6}
INPUT VOLTAGE (V)
May 2007
Line Regulation
0.000
-0.005
-0.010
-0.015
-0.020
I_OUT = 100mA
-0.025
-0.030
-0.035
I_OUT = 1.5A
-0.040
-0.045
-0.0502V^O
=
1.8V
3
4
5
6
INPUT VOLTAGE (V)
Switching Frequency
vs. Temperature
2.04
2.02
2.00
1.98
1.96
1.94
1.92
1.90
20 40 60 80
TEMPERATURE (°C)
Quiescent Current
vs. Input Voltage
1.4
1.2
1.0
0.8
0.6
0.4
0.2
00 _{1 2 3 4 5 6}
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
1.10
1.05
1.00
Turn-on
0.95
0.90
0.85
0.80
Turn-off
0.75
0.70
0.65
0.620.5 _{3 3.5 4 4.5 5 5.5 6}
INPUT VOLTAGE (V)
5
MIC4721
1.005
Reference Voltage
vs. Temperature
1.000
0.995
0.990
0.985
0.980
0.975
V_IN = 3.3V
0.970
20 40 60 80
TEMPERATURE (°C)
Switching Frequency
vs. Input Voltage
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.820.5 _{3 3.5 4 4.5 5 5.5 6}
INPUT VOLTAGE (V)
Switch On-Resistance
vs. Temperature
200
180
R_ON @ 2.7V_IN
160
140
120
100
80 ^{RON @ 3.3VIN}
R_ON @ 5V_IN
60
40
20
0
20 40 60 80
TEMPERATURE (°C)
Enable Threshold
vs. Temperature
1.00
0.95
0.90
0.85
0.80 ^Turn-off
Turn-on
0.75
0.70
0.65
V_IN = 3.3V
0.60
20 40 60 80
TEMPERATURE (°C)
M9999-052907-A