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S-1155 Schematic ( PDF Datasheet ) - Seiko Instruments

Teilenummer S-1155
Beschreibung HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Hersteller Seiko Instruments
Logo Seiko Instruments Logo 




Gesamt 28 Seiten
S-1155 Datasheet, Funktion
Rev.1.1_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT
CMOS VOLTAGE REGULATOR
S-1155 Series
www.datasheet4u.com
The S-1155 Series, developed based on CMOS technology, is a positive
voltage regulator with a super low dropout voltage, high output voltage
accuracy, and low current consumption.
The S-1155 Series provides the very small dropout voltage and the large
output current due to the built-in transistor with low on-resistance. The
overcurrent protector prevents the load current from exceeding the
capacitance of output transistor. The thermal shutdown circuit prevents
damage caused by heat, the rush current control circuit limits the
excessive rush current during start-up.
The ON/OFF circuit ensures longer battery life. Various capacitors, also
small ceramic capacitors, can be used for this IC more than for the
conventional regulator ICs which have CMOS technology.
The small package SOT-89-5 enables high-density mounting.
„ Features
Output voltage :
Low equivalent series resistance capacitor :
Input voltage :
High-accuracy output voltage :
Low dropout voltage :
Low current consumption :
Output current :
High ripple rejection :
Built-in overcurrent protection circuit :
Built-in thermal shutdown circuit :
Built-in rush current control circuit :
Built-in power on/off circuit :
Small package :
Lead-free product
1.0 to 5.0 V, selectable in 0.05 V step.
Ceramic capacitor of 4.7 µF or more can be used as the
I/O capacitor.
1.5 to 5.5 V
±1.0% (1.0 to 1.45 V output product : ±15 mV)
70 mV typ. (3.0 V output product, at IOUT = 200 mA)
During operation : 70 µA typ., 90 µA max. (3.0 V output
product)
During shutdown : 0.1 µA typ., 1.0 µA max.
500 mA (3.0 V output product, at VIN VOUT(S) + 1.0 V)*1
70 dB typ. (at 1.0 kHz, VOUT = 1.0 V)
limits overcurrent of output transistor
prevents damage caused by heat
limits excessive rush current during start-up
Longer battery life
SOT-89-5
*1. Attention should be paid to the power dissipation of the package when the output current is large.
„ Applications
Power supply for battery-powered devices
Power supply for TV, notebook PCs and home electric appliances
Constant-voltage power supply for portable equipment
„ Packages
Package Name
SOT-89-5
Package
UP005-A
Drawing Code
Tape
UP005-A
Reel
UP005-A
Seiko Instruments Inc.
1






S-1155 Datasheet, Funktion
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
Rev.1.1_00
„ Absolute Maximum Ratings
www.datasheet4u.com
Parameter
Input voltage
Output voltage
Power dissipation
Operating ambient temperature
Storage temperature
*1. When mounted on board
[Mounted board]
(1) Board size :
(2) Name :
Symbol
VIN
VON/OFF
VOUT
PD
Topr
Tstg
Table 3
(Ta = 25°C unless otherwise specified)
Absolute Maximum Rating
Unit
VSS 0.3 to VSS + 6
VSS 0.3 to VIN + 0.3
VSS 0.3 to VIN + 0.3
1000*1
V
V
V
mW
40 to +85
°C
40 to +125
°C
114.3 mm × 76.2 mm × t1.6 mm
JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
1200
1000
800
600
400
200
0
0 50 100 150
Ambient temperature (Ta) [°C]
Figure 3 Power Dissipation of Package (When Mounted on Board)
Condition
SOT-89-5 (When mounted on board)
Table 4
Power Dissipation
1000 mW
Thermal Resistance Value (θja)
100°C/W
6 Seiko Instruments Inc.

6 Page









S-1155 pdf, datenblatt
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
Rev.1.1_00
6. Temperature coefficient of output voltage  VOUT 
www.datasheet4u.com
Ta VOUT
The shadowed area in Figure 10 is the range where VOUT varies in the operating temperature range when the
temperature coefficient of the output voltage is ±130 ppm/°C.
VOUT [V]
Ex. S-1155B30 Typ.
+0.39 mV / °C
VOUT(E)*1
0.39 mV / °C
40 25
85 Ta [°C]
*1. VOUT(E) is the value of the output voltage measured at 25°C.
Figure 10
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
VOUT
Ta
[mV
/
°C]*1
=
[VOUT(S) V
]*2
×
VOUT
Ta VOUT
[ppm
/
°C]*3
÷ 1000
*1. Change in temperature of output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
12 Seiko Instruments Inc.

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