Datasheet
2010 Microchip Technology Inc. DS22234A-page 5
MCP1640/B/C/D
2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise indicated, V
IN
= EN = 1.2V, C
OUT
=C
IN
=10µF, L
=4.7µH, V
OUT
=3.3V, I
LOAD
=15mA, T
A
=+25°C.
FIGURE 2-1: V
OUT
I
Q
vs. Ambient
Temperature in PFM Mode.
FIGURE 2-2: V
OUT
I
Q
vs. Ambient
Temperature in PWM Mode.
FIGURE 2-3: Maximum I
OUT
vs. V
IN
.
FIGURE 2-4: 2.0V V
OUT
PFM / PWM
Mode Efficiency vs. I
OUT
.
FIGURE 2-5: 3.3V V
OUT
PFM / PWM
Mode Efficiency vs. I
OUT
.
FIGURE 2-6: 5.0V V
OUT
PFM / PWM
Mode Efficiency vs. I
OUT
.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein are
not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
10.0
12.5
15.0
17.5
20.0
22.5
25.0
27.5
-40 -25 -10 5 20 35 50 65 80
Ambient Temperature (°C)
I
Q
PFM Mode (µA)
V
OUT
= 2.0V
V
OUT
= 5.0V
V
OUT
= 3.3V
V
IN
= 1.2V
150
175
200
225
250
275
300
-40 -25 -10 5 20 35 50 65 80
Ambient Temperature (°C)
I
Q
PWM Mode (µA)
V
OUT
= 3.3V
V
OUT
= 5.0V
V
IN
= 1.2V
0
100
200
300
400
500
600
00.511.522.533.544.55
V
IN
(V)
I
OUT
(mA)
V
OUT
= 3.3V
V
OUT
= 2.0V
V
OUT
= 5.0V
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10 100 1000
I
OUT
(mA)
Efficiency (%)
V
OUT
= 2.0V
V
IN
= 0.8V
V
IN
= 1.2V
V
IN
= 1.6V
PWM / PFM
PWM ONLY
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10 100 1000
I
OUT
(mA)
Efficiency (%)
V
OUT
= 3.3V
V
IN
= 0.8V
V
IN
= 1.2V
V
IN
= 2.5V
PWM / PFM
PWM ONLY
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10 100 1000
I
OUT
(mA)
Efficiency (%)
PWM / PFM
PWM ONLY
V
OUT
= 5.0V
V
IN
= 1.2V
V
IN
= 1.8V
V
IN
= 2.5V