Article List :  Seiko Instruments Inc : 5 posted

S-L2980 - HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR

Seiko Instruments Inc 2008/12/06 09:50

Description
The S-L2980 series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and a large output current. A shutdown circuit ensures long battery life.
Various types of output capacitors can be used in the S-L2980 series compared with the conventional CMOS voltage regulators. A small ceramic capacitor can also be used.

Features
*Output voltage: 1.5 V to 6.0 V, selectable in 0.1 V steps
*High accuracy output voltage: ±2.0 % accuracy
*Low dropout voltage: 120 mV typ. (at 3.0 V output product, IOUT=50 mA)
*Low current consumption: During operation: 90 μA typ., 140 μA max.
                                       During shutdown: 0.1 μA typ., 1.0 μA max.
*High peak current capability: 150 mA output is possible. (at VIN≥VOUT(S)+1.0 V)
*Built-in shutdown circuit: Ensure long battery life.
*Low ESR capacitor: A 1.0 μF capacitor can be used as the output capacitor.
                              (A 2.2 μF capacitor can be used as the output capacitor for the products
                               whose output voltage is 1.7 V or less.)
*High ripple rejection: 70 dB typ. (at 1.0 kHz)
*Small package: SOT-23-5
*Lead-free products

Applications
*Power supply for battery-powered devices
*Power supply for personal communication devices
*Power supply for home electric/electronic appliances
*Power supply for cellular phones  

S-L2980 - HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR

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S-35192A - 3-WIRE REAL-TIME CLOCK

Seiko Instruments Inc 2008/10/08 09:26

General Description
The S-35192A is a CMOS 3-wire real-time clock IC which operates with the very low current
consumption and in the wide range of operation voltage. The operation voltage is 1.3 V to 5.5
V so that this IC can be used for various power supplies from main supply to backup battery.
Due to the 0.45 μA current consumption and wide range of power supply voltage at time keeping, this IC makes the battery life longer. In the system which operates with a backup
battery, the included free registers can be used as the function for user’s backup memory.
Users always can take back the information in the registers which is stored before power-off
the main power supply, after the voltage is restored.
This IC has the function to correct advance/delay of the clock data speed, in the wide range,
which is caused by the oscillation circuit’s frequency deviation. Correcting according to the
temperature change by combining this function and a temperature sensor, it is possible to
make a high precise clock function which is not affected by the ambient temperature.

Features
*Low current consumption : 0.45 μA typ. (VDD = 3.0 V, Ta = 25°C)
*Constant output of 32.768 kHz clock pulse (Nch open-drain output)
*Wide range of operating voltage : 1.3 to 5.5 V
*Built-in clock-correction function
*Built-in free user register
*3-wire (MICROWIRE) CPU interface
*Built-in alarm function
*Built-in flag generator during detection of low power voltage or at power-on
*Auto calendar up to the year 2099, automatic leap year calculation function
*Built-in constant voltage circuit
*Built-in 32.768 kHz crystal oscillator (Cd built in, Cg external)
*Package : SNT-8A
*Lead-free product

Applications
*Mobile game devices
*Mobile AV devices
*Digital still cameras
*Digital video cameras
*Electronic power meters
*DVD recorders
*TVs, VCRs
*Mobile phones, PHS
*Car navigation

 

S-35192A - 3-WIRE REAL-TIME CLOCK

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S-L2985 - HIGH RIPPLE-REJECTION WLP PACKAGE LOW DROPOUT CMOS VOLTAGE REGULATOR

Seiko Instruments Inc 2008/07/19 09:43

The S-L2985 Series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a built-in overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor.
An ON/OFF circuit ensures a long battery life. Compared with the voltage regulators using the conventional CMOS process, a larger variety of capacitors are available, including small ceramic capacitors. A super-small WLP-4B package realizes high-density mounting.

Features
* Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V steps.
* High-accuracy output voltage: ±1.0%
* Low dropout voltage: 190 mV typ. (3.0 V output product, IOUT = 100 mA)
* Low current consumption:
- During operation: 50 μA typ., 90 μA max.
- During shutdown: 0.1 μA typ., 1.0 μA max.
* High peak current capability: 150 mA output is possible (@ VIN ≥ VOUT(S) + 1.0 V)*1
* Built-in ON/OFF circuit: Ensures long battery life.
* Low ESR capacitor can be used: A ceramic capacitor of 0.47 μF or more can be used for the output capacitor.
* High ripple rejection: 80 dB typ. (@ 1.0 kHz)
* Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
* Super-small package: WLP-4B
* Lead-free products

Applications
* Power supply for battery-powered devices
* Power supply for personal communication devices
* Power supply for home electric/electronic appliances
* Power supply for cellular phones  

S-L2985 - HIGH RIPPLE-REJECTION WLP PACKAGE LOW DROPOUT CMOS VOLTAGE REGULATOR

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S-T111 - HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

Seiko Instruments Inc 2008/03/25 16:58

The S-T111 Series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a builtin overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor.
An ON/OFF circuit ensures a long battery life.
Compared with the voltage regulators using the conventional CMOS process, a larger variety of capacitors are available, including small ceramic capacitors.
A small SOT-23-5 package realizes highdensity mounting.

Features
• Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V steps.
• High-accuracy output voltage: ±1.0%
• Low dropout voltage: 190 mV typ. (3.0 V output product, IOUT = 100 mA)
• Low current consumption: During operation: 50 μA typ., 90 μA max.
                                        During shutdown: 0.1 μA typ., 1.0 μA max.
• High peak current capability: 150 mA output is possible (at VIN ≥ VOUT(S) + 1.0 V)*1
• Built-in ON/OFF circuit: Ensures long battery life.
• Low ESR capacitor can be used: A ceramic capacitor of 0.1 μF or more can be used for the output capacitor.
• High ripple rejection: 80 dB typ. (at 1.0 kHz)
• Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
• Small package: SOT-23-5
• Lead-free products
*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 personal communication devices
• Power supply for home electric/electronic appliances
• Power supply for cellular phones  

S-T111 - HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

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S-89530A - MINI ANALOG SERIES 0.7 μA Rail-to-Rail CMOS COMPARATOR

Seiko Instruments Inc 2008/03/18 10:05

The mini analog series is a group of ICs that incorporate a generalpurpose analog circuit in an ultra-small packages.
The S-89530A/89531A Series are CMOS type comparators that feature Rail-to-Rail *1 I/O and can be driven at a lower voltage and lower current consumpsion than existing comparators, making the S- 89530A/89531A for use in battery-powered compact portable devices.

Features
* Can be driven lower voltage than existing general-purpose comparators: VDD = 0.9 V to 5.5 V
* Low current consumption: IDD = 0.7 μA (Typ.)
* Rail-to-Rail *1 wide input and output voltage range: VCMR = VSS to VDD
* Low input offset voltage: 5.0 mV max.
* Small package: 5-Pin SC-88A 2.0 mm × 2.1 mm
* Lead-free products

Applications
* Cellular phones
* PDAs
* Notebook PCs
* Digital cameras
* Digital video cameras

89531A

 

S-89530A - MINI ANALOG SERIES 0.7 μA Rail-to-Rail CMOS COMPARATOR

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