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Rev.1.0_03
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1142 Series
The S-1142 Series, developed based on high-withstand voltage CMOS
process, is a positive voltage regulator with a high-withstand voltage, low
current consumption, and high output voltage accuracy. The S-1142
Series operates at a high maximum operating voltage of 50 V and a low
current consumption of 4.0 µA (typ.). In addition to a built-in low
on-resistance transistor which provides a very small dropout voltage and
a large output current, this voltage regulator also has a built-in power-off
circuit.
An overcurrent protector prevents the load current from exceeding the
capacitance of the output transistor. A built-in thermal shutdown circuit
prevents damage caused by heat.
A high heat radiation HSOP-6 package enables high-density mounting.
„ Features
Output voltage :
2.0 V to 12.0 V, selectable in 0.1 V step
Low equivalent series resistance capacitor : Ceramic capacitor of 0.1 µF or more can be used as the I/O capacitor.
Input voltage :
3.0 V to 50 V
High-accuracy output voltage :
±1.0% (at Tj = +25°C), ±3.0% (Tj = 40°C to +105°C)
Low current consumption :
During operation: 4.0 µA typ., 9.0 µA max. (Tj = 40°C to +105°C)
Output current :
During shutdown: 0.1 µA typ., 1.0 µA max. (Tj = 40°C to +105°C)
200 mA (at VIN VOUT(S) + 2.0 V)*1
Built-in overcurrent protector :
limits overcurrent of output transistor
Operation temperature range :
40°C to +105°C (S-1142xxxH only)
Built-in thermal shutdown circuit :
prevents damage caused by heat
Built-in power on/off circuit :
longer battery life
Small package :
HSOP-6
Lead-free product
www.Data*S1h.eAett4teUn.ctioomn should be paid to the power dissipation of the package when the output current is large.
„ Applications
Constant-voltage power supply for electrical applications for vehicle interiors (S-1142xxxH only)
Constant-voltage power supplies for home electric appliances
„ Package
Package Name
HSOP-6
Package
FH006-A
Drawing Code
Tape
Reel
FH006-A
FH006-A
Land
FH006-A
Caution Before using this product in medical equipment or automobile equipment including car audio, keyless
entry and engine control unit, contact to SII is indispensable.
Seiko Instruments Inc.
1

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HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1142 Series
„ Block Diagram
Rev.1.0_03
*1
VIN
Overcurrent
protector
Thermal shutdown circuit
VOUT
ON/OFF
ON/OFF circuit
+
Reference
voltage circuit
VSS
*1. Parasitic diode
Figure 1
www.DataSheet4U.com
2 Seiko Instruments Inc.

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Rev.1.0_03
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1142 Series
„ Product Name Structure
Users can select the product type, output voltage, and package type for the S-1142 Series. For the contents of
product name, refer to “1. Product Name”, “2. Product Name List” for details of product names.
1. Product Name
S-1142 x xx x - xxxx U
Package abbreviation and IC packing specifications*1
E6T1 : HSOP-6, Tape (S-1142xxxI only)
E6T2 : HSOP-6, Tape (S-1142xxxH only)
Operating temperature
I : 40°C to +85°C
H : 40°C to +105°C
Value of output voltage
20 to C0
(e.g., when the output voltage is 2.0 V, it is expressed as 20.
when the output voltage is 10 V, it is expressed as A0.
when the output voltage is 11 V, it is expressed as B0.
when the output voltage is 12 V, it is expressed as C0.)
Product type*2
A : ON/OFF pin negative logic
B : ON/OFF pin positive logic
*1. Refer to the tape specifications.
*2. Refer to “3. Power-off pin (ON/OFF pin)” in “„ Operation”.
www.DataSheet4U.com
Seiko Instruments Inc.
3