STEP-UP OR DOWN, SINGLE-COIL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
Rev.2.1_00
S-8460
Seiko Instruments Inc. 29
6. Input Voltage (V
IN
) vs. Ripple Voltage (V
rip
) Characteristics
The following shows the actual input voltage (V
IN
) vs. ripple voltage (V
rip
) characteristics when the S-8460 is used under
conditions (31) to (35) in
Table 5.
(31) S-8460B00AFT (V
OUT
= 3.3 V) (32) S-8460B00AFT (V
OUT
= 3.3 V)
0
10
20
30
40
50
0 2 4 6 8 10 12 14 16 18
V
IN
(V)
V
ri
(mV)
CPH6401, MA2Q737, CDRH104R/22 μH
200 mA
66 mA
I
T
= 5 mA
0
10
20
30
40
50
0 2 4 6 8 10 12 14 16 18
V
IN
(V)
V
ri
(mV)
CPH6401, MA2Q737, CDRH104R/10 μH
200 mA
66 mA
I
T
= 5 m
(33) S-8460B00AFT (V
OUT
= 3.3 V)
0
10
20
30
40
50
0 2 4 6 8 10 12 14 16 18
V
IN
(V)
V
ri
(mV)
CPH6401, MA2Q737, CDRH104R/47 μH
200 mA
66 mA
I
OUT
= 5 mA
(34) S-8460B00AFT (V
OUT
= 2.5 V) (35) S-8460B00AFT (V
OUT
= 5.0 V)
0
10
20
30
40
50
0 2 4 6 8 10 12 14 16 18
V
IN
(V)
V
ri
(mV)
CPH6401, MA2Q737, CDRH104R/22 μH
200 mA
50 mA
I
OUT
= 5 mA
0
10
20
30
40
50
0 2 4 6 8 10 12 14 16 18
V
IN
(V)
V
ri
(mV)
CPH6401, MA2Q737, CDRH104R/22 μH
200 mA
100 mA
I
OUT
= 5 mA
