Rev.3.0
_02
HIGH RIPPLE-REJECTION AND 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.
•
High current capability:
800 mA output is possible (at V
IN
≥
V
OUT(S)
+
1.0 V)
*1
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. (at 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:
•
Lead-free products
*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 device
•
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
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0
_02
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
G
IC direction in tape specifications
*1
Product abbreviation
*2
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
*3
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) in the “
Operation”.
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0
_02
S-1170 Series
Pin Configuration
SOT-89-5
Top view
5
4
Table 2
Pin No.
Symbol
Description
1
ON/OFF
Shutdown pin
2
VSS
GND pin
*1
No connection
3
NC
4
VIN
Input voltage pin
5
VOUT
Output voltage pin
The NC pin is electrically open.
The NC pin can be connected to VIN and VSS.
*1.
1
2
3
Figure 2
Table 3
Pin No.
Symbol
1
VOUT
*1
2
VOUT
*1
3
ON/OFF
4
VSS
5
VIN
*2
6
VIN
*2
Short pins 1 and 2.
Short pins 5 and 6.
Description
Output voltage pin
Output voltage pin
Shutdown pin
GND pin
Input voltage pin
Input voltage pin
6-Pin HSON(A)
Top view
6
5
4
1
2
3
Bottom view
1
2
3
*1
*1.
*2.
*2
6
*1.
5
4
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.
Figure 3
Seiko Instruments Inc.
5
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