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S-1170B Datasheet PDF - Seiko Instruments

Part Number S-1170B
Description Voltage Regulator
Manufacturers Seiko Instruments 
Logo Seiko Instruments Logo 

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S-1170B datasheet, circuit
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Rev.3.0_00
HIGH RIPPLE-REJECTION LOW DROPOUT
HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1170 Series
The S-1170 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, a
built-in overcurrent protector prevents the load
current from exceeding the current capacitance of
the output transistor, and a built-in thermal
shutdown circuit prevents damage caused by the
heat. 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. Small SOT-89-5 and 6-Pin HSON(A)
packages realize 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:
120 mV typ. (3.0 V output product, IOUT = 300 mA)
Low current consumption:
During operation: 80 µA typ., 160 µA max.
High peak current capability:
Built-in ON/OFF circuit:
During shutdown: 0.1 µA typ., 1.0 µA max.
800 mA output is possible (at VIN VOUT(S) + 1.0 V)*1
Ensures long battery life.
Low ESR capacitor can be used: A ceramic capacitor of 4.7 µF or more can be used for the output
capacitor.
High ripple rejection:
70 dB typ. (at 1.0 kHz)
Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
Built-in thermal shutdown circuit: Damage caused by heat can be prevented.
Small package:
SOT-89-5, 6-Pin HSON(A)
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 DVD and CD-ROM drives
Power supply for battery-powered devices
Power supply for personal communication devices
Power supply for note PCs
„ Packages
Package Name
SOT-89-5
6-Pin HSON(A)
Package
UP005-A
PD006-A
Drawing Code
Tape
UP005-A
PD006-A
Reel
UP005-A
PD006-A
DataSheet4 U .com
Seiko Instruments Inc.
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S-1170B equivalent
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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_00
S-1170 Series
„ Pin Configuration
SOT-89-5
Top view
54
123
Table 2
Pin No.
1
2
3
4
5
Symbol
ON/OFF
VSS
NC*1
VIN
VOUT
Description
Shutdown pin
GND pin
No connection
Input voltage pin
Output voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to VIN and VSS.
Figure 2
6-Pin HSON(A)
Top view
654
123
Bottom view
123
*1
654
*2
*1. Connect the exposed thermal die
pad at shadowed area to the
board, and set electric potential
open or VSS.
However, do not use it as the
function of electrode.
*2. Be careful of the contact with
other wires because the pinch
lead has the same electric
potential as VSS.
Table 3
Pin No.
1
2
3
4
5
6
Symbol
VOUT*1
VOUT*1
ON/OFF
VSS
VIN*2
VIN*2
Description
Output voltage pin
Output voltage pin
Shutdown pin
GND pin
Input voltage pin
Input voltage pin
*1. Short pins 1 and 2.
*2. Short pins 5 and 6.
Figure 3
DataSheet4 U .com
Seiko Instruments Inc.
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Information Total 29 Pages
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