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PDF S-818 Data sheet ( Hoja de datos )
| Número de pieza | S-818 | |
| Descripción | LOW DROPOUT CMOS VOLTAGE REGULATOR | |
| Fabricantes | Seiko Instruments | |
| Logotipo |  |
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S-818 Series
www.sii-ic.com
© Seiko Instruments Inc., 2000-2015
LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.3.1_00
The S-818 Series is a positive voltage regulator developed by CMOS technology and featured by low dropout
voltage, high output voltage accuracy and low current consumption.
Built-in low on-resistance transistor provides low dropout voltage and large output current. A ceramic
capacitor of 2 μF or more can be used as an output capacitor. An ON/OFF circuit ensures long battery life.
The SOT-23-5 miniaturized package and the SOT-89-5 package are recommended for configuring portable
devices and large output current applications, respectively.
Features
• Output voltage:
2.0 V to 6.0 V, selectable in 0.1 V step
• Output voltage accuracy:
±2.0%
• Dropout voltage:
170 mV typ. (5.0 V output product, IOUT = 60 mA)
• Current consumption:
During operation: 30 μA typ., 40 μA max.
During power-off: 100 nA typ., 500 nA max.
• Output current:
Possible to output 200 mA (3.0 V output product, VIN = 4 V)*1
Possible to output 300 mA (5.0 V output product, VIN = 6 V)*1
• Output capacitor:
A ceramic capacitor of 2 μF or more can be used.
• Built-in ON/OFF circuit:
Ensures long battery life.
• Operation temperature range: Ta = −40°C to +85°C
• Lead-free, Sn 100%, halogen-free*2
*1. Attention should be paid to the power dissipation of the package when the output current is large.
*2. Refer to “ Product Name Structure” for details.
Applications
• Constant-voltage power supply for battery-powered device, personal communication device and home
electric/electronic appliance
Packages
• SOT-23-5
• SOT-89-5
Seiko Instruments Inc.
1
1 page  
Rev.3.1_00
Pin Configurations
SOT-23-5
Top view
54
12 3
Figure 2
SOT-89-5
Top view
54
12 3
Figure 3
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Table 2
Pin No.
Symbol
Pin description
1 VIN Input voltage pin
2
VSS
GND pin
3
ON/OFF
ON/OFF pin
4
NC*1
No connection
5
VOUT
Output voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to VIN pin or VSS
pin.
Table 3
Pin No.
Symbol
Pin description
1
VOUT
Output voltage pin
2
VSS
GND pin
3
NC*1
No connection
4
ON/OFF
ON/OFF pin
5 VIN Input voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to VIN pin or VSS
pin.
Seiko Instruments Inc.
5
5 Page 
Rev.3.1_00
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
4. Load regulation (ΔVOUT3)
Load regulation indicates the output current dependence of output voltage. The value shows how much
the output voltage changes due to the change of the output current when the input voltage is kept
constant.
5. Dropout voltage (Vdrop)
Indicates the difference between input voltage (VIN1) and the output voltage when; decreasing input
voltage (VIN) gradually until the output voltage has dropped out to the value of 98% of the actual output
voltage VOUT(E).
Vdrop=VIN1−(VOUT(E)×0.98)
6.
Output
voltage
temperature
coefficient
ΔVOUT
ΔTa•VOUT
The shaded area in Figure 11 is the range where VOUT varies in the operation temperature range when
the output voltage temperature coefficient is ±100 ppm/°C.
VOUT
[V]
Example of S-818A28A typ. product
+0.28 mV/°C
VOUT(E)*1
−0.28 mV/°C
−40 +25 +85 Ta [°C]
*1. VOUT(E) is the value of the output voltage measured at Ta = +25°C.
Figure 11 Output voltage temperature coefficient range
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa
[mV/°C]*1
=
VOUT(S) [V]*2
×
ΔVOUT
ΔTa•VOUT
[ppm/°C]*3
÷ 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
Seiko Instruments Inc.
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet S-818.PDF ] | |
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