Datasheet

MCP1601
DS21762B-page 6  2003-2013 Microchip Technology Inc.
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 2-7: Output Voltage vs. Load
Current.
FIGURE 2-8: Output Voltage vs. Load
Current.
FIGURE 2-9: Input to Output Voltage
Differential for 100% Duty Cycle vs. Load
Current.
FIGURE 2-10: Switch Leakage vs.
Temperature.
FIGURE 2-11: Typical PWM Mode of
Operation Waveforms.
FIGURE 2-12: Typical PFM Mode of
Operation Waveforms.
1.700
1.720
1.740
1.760
1.780
1.800
1.820
0 100 200 300 400 500
Load Current (mA)
Output Votlage (V)
V
OUT
= 1.8V
Auto PWM/PFM
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
3.10
3.13
3.15
3.18
3.20
3.23
3.25
3.28
3.30
3.33
3.35
0 100 200 300 400 500
Load Current (mA)
Output Voltage (V)
V
OUT
= 3.3V
Auto PWM/PFM
V
IN
= 4.5V
V
IN
= 5.0V
V
IN
= 5.5V
0
50
100
150
200
250
300
350
400
450
0 100 200 300 400 500
Load Current (mA)
Dropout Voltage (mV)
V
OUT
= 3.3V
V
OUT
= 2.7V
Dropout = (V
IN
-V
OUT
) in mV @ 97% of V
OUT
0.0
1.5
3.0
4.5
-40 -15 10 35 60 85
Ambient Temperature (°C)
L
X
Leakage Current (nA)
V
IN
= 5.0V
Synchronous N
Channel
BUCK Switch P
Channel