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参数资料
| 型号： | S-8520A28MC-AVN-T2 |
| 元件分类： | 稳压器 |
| 英文描述： | 0.05 A SWITCHING CONTROLLER, 216 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | SOT-23, 5 PIN |
| 文件页数： | 2/43页 |
| 文件大小： | 488K |
| 代理商： | S-8520A28MC-AVN-T2 |
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STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR
S-8520 / 8521 Series
Rev.7.5_00
10
Seiko Instruments Inc.
3. E type, F type
Table 7
(Ta
=25 °C unless otherwise specified)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Measure-
ment
circuit
Output voltage
*1
VOUT(E)
VOUT(S)
×0.976
VOUT(S)
×1.024
3
E type
2.5
10.0
Input voltage
VIN
F type
2.5
16.0
V
Current consumption 1
ISS1
VOUT
=VOUT(S)×1.2
60
100
Current consumption
during shutdown
ISSS
OFF
/
ON
V
=0 V
0.5
A
2
EXT pin output current
IEXTH
VEXT
=VIN0.4 V
S-8520 / 8521x15 to 24
2.3
4.5
S-8520 / 8521x25 to 34
3.7
7.0
S-8520 / 8521x35 to 44
5.3
9.3
S-8520 / 8521x45 to 54
6.7
11.3
S-8520 / 8521x55 to 60
8.0
13.3
IEXTL
VEXT
=0.4 V
S-8520 / 8521x15 to 24
+4.3
+8.4
S-8520 / 8521x25 to 34
+7.0
+13.2
S-8520 / 8521x35 to 44
+9.9
+17.5
S-8520 / 8521x45 to 54
+12.6
+21.4
S-8520 / 8521x55 to 60
+15.0
+25.1
mA
Line regulation
Δ
VOUT1 VOUT(S)
≤2.0 V
VIN
=2.5 to 2.94 V
30
60
VOUT(S)
>2.0 V
VIN
=VOUT(S)×1.2 to 1.4
30
60
Load regulation
Δ
VOUT2 Load current
=10 A to IOUT ×1.25
30
60
mV
Output voltage temperature
coefficient
Ta
VOUT
Ta
=40 to +85 °C
±VOUT(S)
×5E5
V /
°C
Oscillation frequency
fosc
VOUT(S)
≤2.4 V
225
300
375
Measured waveform at
EXT pin.
VOUT(S)
≥2.5 V
240
300
360
kHz
PWM / PFM control
switching duty ratio
(S-8521 Series)
PFMDuty No load, Measured waveform at EXT pin
15
25
40
%
3
VSH
Judged oscillation at EXT pin
1.8
ON / OFF pin input voltage
VSL
Judged oscillation stop at EXT pin
0.3
V
2
ISH
0.1
0.1
ON / OFF pin input leakage
current
ISL
0.1
0.1
A
1
Soft start time
tss
2.0
4.5
9.2
3
Overload detection time
(E type)
tpro
Duration from the time VOUT is reduced to
0 V to the time the EXT pin obtains VIN.
1.3
2.6
4.5
ms
2
Efficiency
EFFI
90
%
3
External parts Coil:
Sumida Corporation CD54 (47
H)
Diode:
Matsushita Electric Industrial Co., Ltd. MA720 (Shottky type)
Capacitor:
Matsushita Electric Industrial Co., Ltd. TE (16 V, 22
F tantalum type)
Transistor:
Toshiba Corporation 2SA1213Y
Base resistance (Rb): 0.68 k
Base capacitor (Cb): 2200 pF (Ceramic type)
The recommended components are connected to the IC, unless otherwise indicated.
VIN
=VOUT(S)×1.2 V (VIN=2.5 V if VOUT(S)≤2.0 V), IOUT=120 mA
The
OFF
/
ON
pin is connected to VIN pin.
*1
. VOUT(S): Specified output voltage value, VOUT(E): Actual output voltage value
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