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PDF ( 数据手册 , 数据表 ) S-1155

零件编号 S-1155
描述 HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
制造商 Seiko Instruments
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S-1155 数据手册, 描述, 功能
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 pdf, 数据表
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
Rev.1.1_00
www.datashePeta4rua.mcoemter
Symbol
Shutdown pin input
voltage “H”
VSH
Shutdown pin input
voltage “L”
VSL
Shutdown pin input
current “H”
Shutdown pin input
current “L”
ISH
ISL
Ripple rejection
RR
Short-circuit current
ISHORT
Thermal shutdown
detection temperature
TSD
Table 5 (2 / 2)
Conditions
VIN = VOUT(S) + 1.0 V,
RL = 1.0 k,
determined by VOUT
output level
VIN = 5.5 V,
RL = 1.0 k,
determined by VOUT
output level
VIN = VOUT(S) + 1.0 V,
RL = 1.0 k,
determined by VOUT
output level
VIN = 5.5 V,
RL = 1.0 k,
determined by VOUT
output level
1.0 V VOUT(S) 4.5 V
4.5 V < VOUT(S) 5.0 V
1.0 V VOUT(S) 4.5 V
4.5 V < VOUT(S) 5.0 V
VIN = 5.5 V, VON/OFF = 5.5 V
VIN = 5.5 V, VON/OFF = 0 V
VIN = VOUT(S) + 1.0 V,
f = 1 kHz,
Vrip = 0.5 Vrms,
IOUT = 100 mA
VIN = 5.5 V,
f = 1 kHz,
Vrip = 0.5 Vrms,
IOUT = 100 mA
VIN = VOUT(S) + 1.0 V,
ON/OFF pin = ON,
VOUT = 0 V
VIN = 5.5 V,
ON/OFF pin = ON,
VOUT = 0 V
1.0 V VOUT(S) < 1.2 V
1.2 V VOUT(S) 3.0 V
3.0 V < VOUT(S) 4.5 V
4.5 V < VOUT(S) 5.0 V
1.0 V VOUT(S) 4.5 V
4.5 V < VOUT(S) 5.0 V
Junction temperature
(Ta = 25°C unless otherwise specified)
Min.
Typ. Max.
Unit
Test
Circuit
1.0 − − V 4
1.0 − − V 4
− − 0.3 V 4
− − 0.3 V 4
0.1 0.1 µA 4
0.1 0.1 µA 4
70 dB 5
65 dB 5
60 dB 5
60 dB 5
200 mA 3
200 mA 3
150 − °C
Thermal shutdown
release temperature
TSR
Junction temperature
120 − °C
*1. VOUT(S) : Specified output voltage
VOUT(E) : Actual output voltage
The output voltage when fixing IOUT (= 100 mA) and inputting VOUT(S) + 1.0 V or 5.5 V
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.
*3. Vdrop = VIN1 (VOUT3 × 0.98)
VOUT3 is the output voltage when VIN = VOUT(S) + 1.0 V or 5.5 V, and IOUT = 200 mA.
VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage.
*4. The change in temperature [mV/°C] is calculated using the following equation.
VOUT
[ ] [ ] [ ]Ta
mV/ °C
**11
=
VOUT(S)
V
**22 ×
VOUT
Ta VOUT
ppm/°C **33 ÷ 1000
*1. Change in temperature of the output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to limitation of the package power dissipation, this value may not be satisfied. Attention should be paid to the
power dissipation of the package when the output current is large.
This specification is guaranteed by design.
8 Seiko Instruments Inc.







S-1155 equivalent, schematic
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
Rev.1.1_00
„ Precautions
Wiring patterns for the VIN, VOUT and GND pins should be designed so that the impedance is low. When mounting
www.datashaenet4ouu.tcpoumt capacitor between the VOUT and VSS pin (CL) and a capacitor for stabilizing the input between the VIN
and VSS pin (CIN), the distance from the capacitors to these pins should be as short as possible.
Note that the output voltage may increase when a series regulator is used at low load current (1.0 mA or less).
Note that the output voltage may generally increase due to the leakage current from a driver when a series regulator
is used at high temperature.
Generally series regulator may oscillate, depending on the selection of external parts. The following conditions are
recommended for this IC. However, be sure to perform sufficient evaluation under the actual usage conditions for
selection, including the temperature characteristics. Regarding the equivalent series resistance (RESR) for the output
capacitor, refer to (5) Example of Equivalent Series Resistance vs. Output Current Characteristics (Ta = 25°C)
in “„ Reference Data”.
Input capacitor (CIN) : 4.7 µF or more
Output capacitor (CL) : 4.7 µF or more
The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitance is
small, or an input capacitor is not connected. Note that the voltage regulator may oscillate when the value of the
input capacitor is greater than that of the output capacitor.
Ringing may occur when these three conditions below are satisfied. Before selecting an input capacitor, be sure to
evaluate sufficiently under the actual usage conditions, including the temperature characteristics.
The power supply inductance is high.
The load current is 100 mA or more.
The difference between the input voltage and the output voltage is close to the value of dropout voltage.
If the output capacitance is small, power supply’s fluctuation and the characteristics of load fluctuation become worse.
Sufficiently evaluate the output voltage’s fluctuation with the actual device.
A momentary overshoot may be output when the power supply suddenly increases, and the output capacitance is
small. It is therefore important to sufficiently evaluate the output voltage at power application in actual device.
The application conditions for the input voltage, output voltage, and load current should not exceed power dissipation
of the package.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
In determining the output current, attention should be paid to the output current value specified in Table 5 in “„
Electrical Characteristics” and footnote *5 of the table.
SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including
this IC of patents owned by a third party.
16 Seiko Instruments Inc.










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