Datasheet

MCP1603/B/L
DS22042B-page 8  2007-2012 Microchip Technology Inc.
Note: Unless otherwise indicated, MCP1603/L, V
IN
= SHDN =3.6V, C
OUT
=C
IN
= 4.7 µF, L = 4.7 µH,
V
OUT
(ADJ) = 1.8V, I
LOAD
= 100 mA, T
A
= +25°C. Adjustable or fixed output voltage options can be used to generate the
Typical Performance Characteristics.
FIGURE 2-7: Efficiency vs. Input Voltage
(V
OUT
= 1.8V).
FIGURE 2-8: Efficiency vs. Output Load
(V
OUT
= 1.8V).
FIGURE 2-9: Efficiency vs. Input Voltage
(V
OUT
= 2.4V).
FIGURE 2-10: Line Regulation vs. Ambient
Temperature (V
OUT
= 1.8V).
FIGURE 2-11: Output Voltage vs. Load
Current (V
OUT
= 1.8V).
FIGURE 2-12: PFM/PWM Efficiency vs.
Output Load (V
OUT
= 2.4V).
80
85
90
95
100
Efficiency (%)
V
OUT
= 1.8V
I
OUT
= 100 mA
I
OUT
= 500 mA
I
OUT
= 300 mA
70
75
2.7 3.05 3.4 3.75 4.1 4.45 4.8 5.15 5.5
Input Voltage (V)
30
40
50
60
70
80
90
100
E
fficiency (%)
V
18V
V
IN
= 4.2V
V
IN
= 2.7V
V
IN
= 3.6V
0
10
20
30
0.1 1 10 100 1000
E
Output Current (mA)
V
OUT
=
1
.
8V
PFM/PWM
PWM Only
80
85
90
95
100
Efficiency (%)
V
OUT
= 2.4V
I
OUT
= 100 mA
I
OUT
= 500 mA
I
OUT
= 300 mA
75
80
33.544.555.5
Input Voltage (V)
02
0.3
0.4
0.5
0.6
n
e Regualtion (%/V)
I
OUT
= 100 mA
I
OUT
= 300 mA
V
OUT
= 1.8V
0.1
0
.
2
-40 -25 -10 5 20 35 50 65 80 95 110 125
Li
n
Ambient Temperature (
o
C)
1.76
1.77
1.78
1.79
1.80
1.81
1.82
O
utput Voltage (V)
T
A
= +125
o
C
T
A
= -40
o
C
T
A
= +25
o
C
T
A
= +90
o
C
1.74
1.75
100 150 200 250 300 350 400 450 500
O
Output Current (mA)
30
40
50
60
70
80
90
100
E
fficiency (%)
V
24V
V
IN
= 4.2V
V
IN
= 2.7V
V
IN
= 3.6V
0
10
20
30
0.1 1 10 100 1000
E
Output Current (mA)
V
OUT
=
2
.
4V
PFM/PWM
PWM Only