MCP1601 Datasheet, PDF (5/22 Pages) Microchip Technology – 500 mA Synchronous BUCK Regulator

MCP1601
2.0 TYPICAL PERFORMANCE CURVES
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.
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.
100
90
80
70
60
50
40
0
V_OUT = 1.2V
Auto PWM/PFM
V_IN = 4.2V
V_IN = 3.6V
V_IN = 2.7V
100
200
300
400
500
Load Current (mA)
FIGURE 2-1:
(V_OUT = 1.2V).
Efficiency vs. Load Current
130
120
V_OUT = 1.8V
PFM Mode
I_LOAD = 0
T_A = + 25°C
110
T_A = + 85°C
T_A = + 0°C
T_A = - 40°C
100
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
FIGURE 2-4:
PFM Mode Quiescent
Current vs. Input Voltage.
110
100
90
80
70
60
50
0
V_OUT = 1.8V
Auto PWM/PFM
V_IN = 4.2V
V_IN = 3.6V
V_IN = 2.7V
100
200
300
400
500
Load Current (mA)
FIGURE 2-2:
(V_OUT = 1.8V).
Efficiency vs. Load Current
780.0
760.0
740.0
I_LOAD = 10 mA
Forced PWM Mode
T_A = - 40°C
T_A = 0°C
T_A = + 125°C
720.0
700.0
T_A = + 25°C
680.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
FIGURE 2-5:
Input Voltage.
Oscillator Frequency vs.
110
100 V_IN = 4.5V
90
V_IN = 5.0V
80
V_IN = 5.5V
70
V_OUT = 3.3V
Auto PWM/PFM
60
50
0
100
200
300
400
500
Load Current (mA)
FIGURE 2-3:
(V_OUT = 3.3V).
Efficiency vs. Load Current
1.300
1.275
1.250
1.225
1.200
1.175
1.150
1.125
1.100
0
V_OUT = 1.2V
Auto PWM/PFM
V_IN = 3.6V
V_IN = 2.7V
V_IN = 4.2V
100
200
300
400
500
Load Current (mA)
FIGURE 2-6:
Current.
Output Voltage vs. Load
 2003 Microchip Technology Inc.
DS21762A-page 5