Datasheet

 2003-2013 Microchip Technology Inc. DS21762B-page 5
MCP1601
2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise indicated, V
IN
= 4.2V, V
OUT
= 1.8V, L = 10 µH, C
OUT
= 10 µF (X5R Ceramic), C
IN
= 10 µF (X5R
Ceramic), SYNC/PWM=V
IN
.
FIGURE 2-1: Efficiency vs. Load Current
(V
OUT
= 1.2V).
FIGURE 2-2: Efficiency vs. Load Current
(V
OUT
= 1.8V).
FIGURE 2-3: Efficiency vs. Load Current
(V
OUT
= 3.3V).
FIGURE 2-4: PFM Mode Quiescent
Current vs. Input Voltage.
FIGURE 2-5: Oscillator Frequency vs.
Input Voltage.
FIGURE 2-6: Output Voltage vs. Load
Current.
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.
40
50
60
70
80
90
100
0 100 200 300 400 500
Load Current (mA)
Efficiency (%)
V
OUT
= 1.2V
Auto PWM/PFM
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
50
60
70
80
90
100
110
0 100 200 300 400 500
Load Current (mA)
Efficiency (%)
V
OUT
= 1.8V
Auto PWM/PFM
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
50
60
70
80
90
100
110
0 100 200 300 400 500
Load Current (mA)
Efficiency (%)
V
OUT
= 3.3V
Auto PWM/PFM
V
IN
= 5.0V
V
IN
= 4.5V
V
IN
= 5.5V
100
110
120
130
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
PFM Mode Quiescent Current
(µA)
V
OUT
= 1.8V
PFM Mode
I
LOAD
= 0
T
A
= - 40°C
T
A
= + 0°C
T
A
= + 85°C
T
A
= + 25°C
680.0
700.0
720.0
740.0
760.0
780.0
2.73.13.53.94.34.75.15.5
Input Voltage (V)
Internal Oscillator Frequency
(kHz)
T
A
= + 125°C
T
A
= - 40°C
T
A
= + 25°C
T
A
= 0°C
I
LOAD
= 10 mA
Forced PWM Mode
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.275
1.300
0 100 200 300 400 500
Load Current (mA)
Output Voltage (V)
V
OUT
= 1.2V
Auto PWM/PFM
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V