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S-1206 Schematic ( PDF Datasheet ) - Seiko Instruments

Teilenummer S-1206
Beschreibung ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Hersteller Seiko Instruments
Logo Seiko Instruments Logo 




Gesamt 36 Seiten
S-1206 Datasheet, Funktion
Rev.1.1_00
ULTRA LOW CURRENT CONSUMPTION
AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1206
Series
The S-1206 Series is a positive voltage regulator with ultra low current
consumption, low dropout voltage, high output voltage accuracy, and 250
mA output current developed based on CMOS technology.
I/O capacitors are as small as 0.1 µF. S-1206 Series operates at ultra
low current consumption of 1.0 µA (typ.).
The built-in low-on-resistance transistor realizes low dropout voltage and
high output current. A built-in overcurrent protection circuit prevents the
load current from exceeding the current capacitance of the output
transistor.
Three packages, SOT-23-3, SOT-89-3, and SNT-6A(H), are available.
Compared with voltage regulators using a conventional CMOS process,
more types of capacitors, including small I/O capacitors, can be used with
the S-1206 Series. The S-1206 Series features ultra-low current
consumption and comes in a small package, making them most suitable
for portable equipment.
„ Features
Output voltage :
1.2 to 5.2 V, selectable in 0.05 V steps.
Low equivalent series resistance capacitor can be used : A ceramic capacitor of 0.1 µF or more can be used for the I/O
capacitor.
Wide input voltage range :
1.7 to 6.5 V
High-accuracy output voltage :
±1.0% (1.2 to 1.45 V output product : ±15 mV)
Low dropout voltage :
Low current consumption :
150 mV typ. (3.0 V output product, at IOUT = 100 mA)
During operation : 1.0 µA typ., 1.5 µA max.
High output current :
Built-in overcurrent protection circuit :
250 mA output is possible. (3.0 V output product, at VIN
VOUT(S) + 1.0 V)*1
Overcurrent of output transistor can be restricted.
Small package :
SOT-23-3, SOT-89-3, SNT-6A(H)
www.DataSLheeeatd4-Ufr.ceoemproducts
*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
Constant-voltage power supply for cellular phones
Constant-voltage power supply for portable equipments
„ Packages
Package Name
SOT-23-3
SOT-89-3
SNT-6A(H)
Package
MP003-Z
UP003-A
PI006-A
Drawing Code
Tape
Reel
MP003-Z
MP003-Z
UP003-A
UP003-A
PI006-A
PI006-A
Land
PI006-A
Seiko Instruments Inc.
1






S-1206 Datasheet, Funktion
ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1206 Series
Rev.1.1_00
„ Absolute Maximum Ratings
Table 5
(Ta = 25 °C unless otherwise specified)
Item
Symbol
Absolute Maximum Rating
Unit
Input voltage
Output voltage
Power dissipation
SOT-23-3
SOT-89-3
SNT-6A(H)
VIN
VOUT
PD
VSS 0.3 to VSS + 7
VSS 0.3 to VIN + 0.3
430*1
1000*1
500*1
V
V
mW
mW
mW
Operating ambient temperature
Storage temperature
*1. When mounted on board
Topr
Tstg
40 to +85
40 to +125
°C
°C
[Mounted board]
(1) Board size : 114.3 mm × 76.2 mm × t1.6 mm
(2) Board name : 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
SOT-89-3
www.DataSheet4U.com
800
SNT-6A (H)
600
SOT-23-3
400
200
0
0 50 100 150
Ambient Temperature (Ta) [°C]
Figure 5 Power Dissipation of Package (When Mounted on Board)
6 Seiko Instruments Inc.

6 Page









S-1206 pdf, datenblatt
ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1206 Series
Rev.1.1_00
„ Operation
1. Basic Operation
Figure 11 shows the block diagram of the S-1206 Series.
The error amplifier compares the reference voltage (Vref) with Vfb, which is the output voltage resistance-divided by
feedback resistors Rs and Rf. It supplies the output transistor with the gate voltage necessary to ensure a certain
output voltage free of any fluctuations of input voltage and temperature.
VIN
Constant
current supply
Vref
Error amplifier
+
*1
Rf
VOUT
Reference voltage
circuit
Vfb
Rs
VSS
*1. Parasitic diode
Figure 11
2. Output Transistor
The S-1206 Series uses a low-on-resistance P-channel MOS FET as the output transistor.
www.DataSheBeet4Usu.croemthat VOUT does not exceed VIN + 0.3 V to prevent the IC from being damaged due to inverse current flowing
from the VOUT pin through a parasitic diode to the VIN pin.
12 Seiko Instruments Inc.

12 Page





SeitenGesamt 36 Seiten
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