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參數(shù)資料
| 型號(hào)： | S-8520 |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | PWM Control Step-Down Switching Regulator-Controller(PWM 控制，步降開(kāi)關(guān)穩(wěn)壓器-控制器) |
| 中文描述： | PWM控制降壓型開(kāi)關(guān)穩(wěn)壓控制器（脈寬調(diào)制控制，步降開(kāi)關(guān)穩(wěn)壓器-控制器） |
| 文件頁(yè)數(shù)： | 6/30頁(yè) |
| 文件大?。?/td> | 650K |
| 代理商： | S-8520 |
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PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers
Rev.6.1
S-8520/8521 Series
Seiko Instruments Inc.
5
2.
S-8520/21 C & D Series
(Ta = 25
o
C
, unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Measurement
Circuit
Output voltage
VOUT
VOUT
X 0.976
VOUT
VOUT
X 1.024
V
4
Input voltage
VIN
S-8520/21C Series
2.5
-
10.0
V
2
S-8520/21D Series
2.5
-
16.0
Current Consumption 1
Current Consumption
during Power-Off
ISS1
Vout = Output voltage x 1.2
-
10
21
m
A
2
ISSS
Power-off Pin = 0V
-
-
0.5
m
A
2
S-8520/21X15
-
24
-2.3
-4.5
-
S-8520/21X25
-
34
-3.7
-7.0
-
IEXTH
VEXT = VIN-0.4V
S-8520/21X35
-
44
-5.3
-9.3
-
S-8520/21X45
-
54
-6.7
-11.3
-
EXT Pin Output Current
S-8520/21X55
-
60
-8.0
-13.3
-
mA
-
S-8520/21X15
-
24
+4.3
+8.4
-
S-8520/21X25
-
34
+7.0
+13.2
-
IEXTL
VEXT = 0.4V
S-8520/21X35
-
44
+9.9
+17.5
-
S-8520/21X45
-
54
+12.6
+21.4
-
S-8520/21X55
-
60
+15.0
+25.1
-
Line Regulation
Load regulation
Output Voltage Temperature
Coefficient
D
VOUT1 Vin = Output voltage x1.2 to x1.4 *3
D
VOUT2 Load current
=10uA to IOUT(See below) x1.25
-
30
60
mV
3
-
30
60
mV
3
D
VOUT
/
D
Ta
Ta= - 40
o
C
to 85
o
C
-
±
VOUT
x 5E-5
-
V/
o
C
3
Oscillation Frequency
fosc
Measure waveform at
EXT pin
VOUT
3
2.5V
48
60
72
kHz
3
VOUT
￡
2.4V
45
60
75
PWM/PFM-control switch
Duty Ratio *1
Power-Off Terminal
Input Voltage
Power-Off Terminal
Input Leakage Current
Soft-Start Time
PFMDuty Measure waveform at EXT pin under no load.
15
25
40
%
3
VSH
Evaluate oscillation at EXT pin
1.8
-
-
V
2
VSL
Evaluate oscillation stop at EXT pin
-
-
0.3
ISH
-
-
0.1
m
A
1
ISL
-
-
-0.1
m
A
1
TSS
6.0
12.0
24.0
ms
3
Overload Detection Time *2
TPRO
Duration from the time Vout is reduced to 0V to
the time the EXT terminal obtains Vin.
7.0
14.0
28.0
ms
2
Efficiency
EFFI
-
93
-
%
3
Conditions:
The recommended components are connected to the IC, unless otherwise indicated. Vin = Vout x 1.2 [V], Iout = 120
[mA] (Vin = 2.5V, if Vout
￡
2.0V.)
Peripheral components:
Coil
: Sumida Electric Co.,Ltd. CD54 (47
m
H).
Diode
: Matsushita Electronics Corporation MA720 (Schottky type).
Capacitor
: Matsushita Electronics Corporation TE (16V, 22
m
F tantalum type).
Transistor
: Toshiba 2SA1213Y.
Base resistance (Rb)
: 0.68K
W
Base capacitor (Cb)
: 2200 pF (Ceramic type)
The power-off terminal is connected to VIN.
Notes:
The output voltage indicated above represents a typical output voltage set up. These specifications apply in common to
both S-8520 and S-8521, unless otherwise noted.
*1: Applicable to the S-8521C Series and S-8521D Series.
*2: Applicable to the S-8520C Series and S-8521C Series.
*3: Vin = 2.5V to 2.94V, if Vout
￡
2.0V.
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| S-8520A20MC-AVFT2G | 功能描述:DC/DC 開(kāi)關(guān)控制器 Step Down SWR PWM 180kHz 60uA Iq RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| S-8520A21MC-AVG-T2 | 功能描述:DC/DC 開(kāi)關(guān)控制器 2.1V Step-Down PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| S-8520A21MC-AVGT2G | 功能描述:DC/DC 開(kāi)關(guān)控制器 2.1V Step-Down PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| S-8520A25MC-ARK-T2 | 制造商:SII 制造商全稱(chēng):Seiko Instruments Inc 功能描述:PWM CONTROL & PWM/PFM CONTROL STEP-DOWN SWITCHING REGULATOR-CONTROLLERS |
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