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参数资料
| 型号： | S-8328B50MA-EXE-T2 |
| 元件分类： | 稳压器 |
| 英文描述： | 0.3 A SWITCHING CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO3 |
| 封装： | PLASTIC, SOT-23, 3 PIN |
| 文件页数： | 6/65页 |
| 文件大小： | 759K |
| 代理商： | S-8328B50MA-EXE-T2 |
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SMALL PACKAGE PWM/PFM CONTROL STEP-UP SWITCHING REGULATOR
S-8324/8328 Series
Rev. 7.2_10
14
Seiko Instruments Inc.
2-4. S-8328JxxMC
(Unless otherwise specified: Ta=25
°C)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Test circuit
Output voltage
VOUT
S-
8328J25MC
2.440
2.500
2.560
V
3
S-
8328J50MC
4.880
5.000
5.120
Input voltage
VIN
9
Operation start voltage
VST1
IOUT=1 mA
1.4
Oscillation start voltage
VST2
No external parts, voltage applied to VOUT
1.3
4
Operation holding voltage
VHLD
IOUT=1 mA, Measured by decreasing VIN
voltage gradually B.
0.7
3
Current consumption 1
ISS1
VOUT=output voltage
×0.95
S-
8328J25MC
44.9
74.8
A
4
S-
8328J50MC
93.7
156.1
Current consumption 2
ISS2
VOUT=output voltage+0.5
S-
8328J25MC
9.9
19.7
S-
8328J50MC
10.2
20.3
EXT pin output current
IEXTH
VEXT=VOUT-0.4 V
S-
8328J25MC
-2.3
-4.0
mA
S-
8328J50MC
-5.3
-8.0
IEXTL
VEXT=-0.4 V
S-
8328J25MC
5.3
8.0
S-
8328J50MC
10.7
16.0
Line regulation
VOUT1
VIN=output voltage
×0.4 to ×0.6
30
60
mV
3
Load regulation
VOUT2
IOUT=10
A to IOUT(below) ×1.25
30
60
Output voltage
VOUT/Ta Ta=-40°C to +85°C
S-
8328J25MC
±0.13
mV/
°C
temperature coefficient
S-
8328J50MC
±0.25
Oscillation frequency
fosc
VOUT=output voltage
×0.95
Measured waveform at EXT pin
212.5
250
287.5
kHz
4
Max. duty ratio
MaxDuty
VOUT=output voltage
×0.95
Measured waveform at EXT pin
70
78
85
%
PWM/PFM control switch
duty ratio
PFMDuty
VIN= output voltage -0.1 V
No load
515
24
Soft start time
tSS
1.5
3.0
6.0
ms
Efficiency
EFFI
S-
8328J25MC
77
%3
S-
8328J50MC
85
External parts used:
- Coil:
CD54 (22
H) of Sumida Corporation
- Diode:
MA720 (Schottky type) of Matsushita Electric Industrial Co., Ltd.
- Capacitor:
F93 (16 V, 47
F, tantalum type) of Nichicon Corporation
- Transistor:
NDS355AN of National Semiconductor
Applied VIN=output voltage
×0.6, IOUT=output voltage/50
The VDD pin is connected to VOUT pin for VDD/VOUT separate product.
Note 1:
The output voltage specified above is the typical value.
Note 2:
VDD/VOUT Separate products:
Boot operation is performed from VDD=0.8 V.
However, 2.0 V or more for VDD is recommended to stabilize the output voltage and oscilation frequency.
However, accuracy of volutage is degrated to
±4% under the VDD volutage between 2.0 V to 2.35 V.
DISCONTINUED
PRODUCT
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