
STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.9.0_00
S-8520/8521 Series
Seiko Instruments Inc.
25
Characteristics (Typical Data)
1.
Examples of major parameters characteristics
(1) Current consumption (ISS1)-Input voltage (VIN)
0
5
10
15
20
Ta =
+25°C
Ta =
+85°C
I SS
1
[
μA]
(fosc = 60 kHz)
2
4
6
8
10
12
14
16
VIN [V]
Ta =
40°C
0
10
20
30
40
2
4
6
8
10
12
14
16
VIN [V]
I SS
1
[
μA]
Ta =
40°C
Ta =
+85°C
Ta =
+25°C
(fosc = 180 kHz)
0
10
20
30
40
50
60
2
4
6
8
10
12
14
16
VIN [V]
I SS1
[
μA]
(fosc = 300 kHz)
Ta =
40°C
Ta =
+25°C
Ta =
+85°C
(2) Oscillation frequency (fosc)-Input voltage (VIN)
40
45
50
55
60
65
70
75
80
2
4
6
8
10
12
14
16
VIN [V]
f os
c[k
Hz
]
(fosc = 60 kHz)
Ta =
+25°C
Ta =
+85°C
Ta =
40°C
140
150
160
170
180
190
200
210
220
2
4
6
8
10
12
14
16
VIN [V]
f osc
[k
H
z
]
(fosc = 180 kHz)
Ta =
+25°C
Ta =
+85°C
Ta =
40°C
240
260
280
300
320
340
360
2
4
6
8
10
12
14
16
VIN [V]
f osc
[
k
Hz]
(fosc = 300 kHz)
Ta =
40°C
Ta =
+25°C
Ta =
+85°C