SC631 Datasheet, PDF (7/14 Pages) Semtech Corporation – Fixed 4.4V Output Charge Pump Regulator

Typical Characteristics (continued)
Ripple — 1x Mode
V = 5.2V, V = 4.4V, I = 400mA
IN
OUT
OUT
V (20mV/div)
IN -PP
V (20mV/div)
OUT -PP
I (200mA/div)
OUT
400mA
0mA
C =C =22μF (0805)
IN OUT
C =C =2.2μF (0603)
12
Time (10μs/div)
Ripple — 2x Mode
V = 3.2V, V = 4.4V, I = 400mA
IN
OUT
OUT
V (50mV/div)
IN -PP
V (50mV/div)
OUT -PP
I (200mA/div)
OUT
400mA
0mA
C =C =22μF (0805)
IN OUT
C₁=C₂=2.2μF (0603)
Time (10μs/div)
Startup (400mA)
V = 3.6V, I = 400mA
IN
OUT
V_EN (2V/div)–
0V —
V (2V/div)–
OUT
0V—
0V—
I (200mA/div)–
OUT
C =C =22μF (0805)
IN OUT
C =C =2.2μF (0603)
12
Time (200μs/div)
SC631
Ripple — 1.5x Mode
V = 4.2V, V = 4.4V, I = 400mA
IN
OUT
OUT
V (100mV/div)
IN -PP
V (100mV/div)
OUT -PP
I (200mA/div)
OUT
400mA
0mA
C_IN=C_OUT=22μF (0805)
C =C =2.2μF (0603)
12
Time (10μs/div)
Startup (No Load)
V = 3.6V, I = 0mA
IN
OUT
V (2V/div)–
EN
0V—
V (2V/div)–
OUT
0V—
0V—
I (200mA/div)
OUT
C =C =22μF (0805)
IN OUT
C =C =2.2μF (0603)
12
Time (200μs/div)
Quiescent Current
V = 5V, I = 1mA
OUT
OUT
2.5
85C 25C
2.0
1.5 _-45C
1.0
0.5
4.20
3.94
3.68
3.42
V (V)
IN
3.16
2.90
7