Rev.1.0
_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
1.5 V to 5.5 V, selectable in 0.1 V steps.
±1.0%
120 mV typ. (3.0 V output product, I
OUT
=
300 mA)
During operation: 80
µA
typ., 160
µA
max.
During shutdown: 0.1
µA
typ., 1.0
µA
max.
*1
•
High peak current capability:
800 mA output is possible (@ V
IN
≥
V
OUT(S)
+
1.0 V)
Ensures long battery life.
•
Built-in ON/OFF circuit:
•
Low ESR capacitor can be used: A ceramic capacitor of 4.7
µF
or more can be used for the output
capacitor.
70 dB typ. (@ 1.0 kHz)
•
High ripple rejection:
Overcurrent of output transistor can be restricted.
•
Built-in overcurrent protector:
•
Built-in thermal shutdown circuit: Damage caused by heat can be prevented.
SOT-89-5, 6-Pin HSON(A)
•
Small package:
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
•
Output voltage:
•
High-accuracy output voltage:
•
Low dropout voltage:
•
Low current consumption:
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
Package
SOT-89-5
6-Pin HSON(A)
UP005-A
PD006-A
Drawing Code
Tape
UP005-A
PD006-A
Reel
UP005-A
PD006-A
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.1.0
_00
S-1170 Series
Product Name Structure
•
The product types, output voltage, and package types for the S-1170 Series can be selected at the user’s
request. Refer to the “Product name” for the meanings of the characters in the product name and
“Product name list” for the full product names.
1. Product name
S-1170
x
xx
xx
–
xxx
–
TF
IC direction in tape specifications
Product abbreviation
*2
*1
Package abbreviation
UC: SOT-89-5
PD: 6-Pin HSON(A)
Output voltage
15 to 55
(E.g., when the output voltage is 1.5 V, it is
expressed as 15.)
Product type
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1.
Refer to the taping specifications at the end of this book.
*2.
Refer to the product name list.
*3.
Refer to 3. Shutdown pin (ON/OFF pin) under the Operation.
*3
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.1.0
_00
S-1170 Series
Pin Configuration
SOT-89-5
Top view
5
4
Table 2
Pin No.
1
2
3
4
5
Symbol
ON/OFF
VSS
*1
NC
VIN
VOUT
Description
Shutdown pin
GND pin
No connection
Input voltage pin
Output voltage pin
1
2
Figure 2
3
*1.
The NC pin is electrically open.
The NC pin can be connected to VIN and VSS.
6-Pin HSON(A)
Top view
6
5
4
Table 3
Pin No.
1
2
3
4
5
6
Symbol
*1
VOUT
*1
VOUT
ON/OFF
VSS
*2
VIN
*2
VIN
Description
Output voltage pin
Output voltage pin
Shutdown pin
GND pin
Input voltage pin
Input voltage pin
1
2
3
*1.
Short pins 1 and 2.
*2.
Short pins 5 and 6.
Figure 3
Absolute Maximum Ratings
Table 4
Parameter
Input voltage
Output voltage
Power dissipation
Operating ambient temperature
Storage ambient temperature
Symbol
V
IN
V
ON/OFF
V
OUT
P
D
T
opr
T
stg
(Ta
=
25°C unless otherwise specified)
Absolute Maximum Rating
Unit
V
V
SS
−
0.3 to V
SS
+
7
V
SS
−
0.3 to V
IN
+
0.3
V
SS
−
0.3 to V
IN
+
0.3
SOT-89-5
500
mW
6-Pin HSON(A)
500
−40
to
+85
°C
−40
to
+125
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.
Seiko Instruments Inc.
5
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