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Rev.2.2
_00
HIGH RIPPLE-REJECTION
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1165 Series
Seiko Instruments Inc.
1
The S-1165 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, and a small SOT-23-5 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:
140 mV typ. (3.0 V output product, I
OUT
= 200 mA)
Low current consumption:
During operation: 35
A typ., 65 A max.
During shutdown: 0.1
A typ., 1.0 A max.
High peak current capability:
200 mA output is possible (@ V
IN
V
OUT(S)
+ 1.0 V)
*1
Built-in ON/OFF circuit:
Ensures long battery life.
High ripple rejection:
70 dB typ. (@ 1.0 kHz)
Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
Small package:
SOT-23-5
*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
Package
SOT-23-5
(Package drawing code: MP005-A)
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1165 Series
Rev.2.2
_00
2
Seiko Instruments Inc.
Block Diagram
VIN
VSS
VOUT
Overcurrent
protector
Reference
voltage circuit
ON/OFF
*1. Parasitic diode
*1
ON/OFF
circuit
+
-
Figure 1
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.2
_00
S-1165 Series
Seiko Instruments Inc.
3
Product Code Structure
The product types and output voltage for the S-1165 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-1165
x xx MC xxx TF
IC direction in tape specifications
*1
Product name (abbreviation)
*2
Package name (abbreviation)
MC:
SOT-23-5
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) under the Operation.
2. Product name list
Table 1
Output Voltage
Product Name
1.5 V 1.0%
S-1165B15MC-N6A-TF
1.8 V 1.0%
S-1165B18MC-N6D-TF
2.5 V 1.0%
S-1165B25MC-N6K-TF
2.7 V 1.0%
S-1165B27MC-N6M-TF
2.9 V 1.0%
S-1165B29MC-N6O-TF
3.0 V 1.0%
S-1165B30MC-N6P-TF
3.3 V 1.0%
S-1165B33MC-N6S-TF
5.0 V 1.0%
S-1165B50MC-N7J-TF
Remark Please contact the SII marketing department for products with an output
voltage other than those specified above or type A products.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1165 Series
Rev.2.2
_00
4
Seiko Instruments Inc.
Pin Configuration
Table 2
Pin
No.
Symbol
Description
1
VIN
Input voltage pin
2
VSS
GND
pin
3
ON/OFF
Shutdown
pin
4
NC
*1
No connection
5
VOUT
Output voltage pin

*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
5 4
1 3
2
SOT-23-5
Top view
Figure 2
Absolute Maximum Ratings
Table 3
(Ta
= 25C unless otherwise specified)
Item
Symbol
Absolute Maximum Rating
Unit
Input voltage
V
IN
V
SS
- 0.3 to V
SS
+ 7
V
V
ON/OFF
V
SS
- 0.3 to V
IN
+ 0.3
Output voltage
V
OUT
V
SS
- 0.3 to V
IN
+ 0.3
Power dissipation
P
D
300
mW
Operating ambient temperature
T
opr
-40 to +85
C
Storage ambient temperature
T
stg
-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.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.2
_00
S-1165 Series
Seiko Instruments Inc.
5
Electrical Characteristics
Table 4
(Ta
= 25C unless otherwise specified)
Item Symbol
Conditions
Min.
Typ.
Max.
Unit
Test
Circuit
Output voltage
*1
V
OUT(E)
V
IN
= V
OUT(S)
+ 1.0 V, I
OUT
= 30 mA
V
OUT(S)
0.99
V
OUT(S)
V
OUT(S)
1.01
V 1
Output current
*2
I
OUT
V
IN
V
OUT(S)
+ 1.0 V
200
*5
mA 3
Dropout voltage
*3
V
drop
I
OUT
= 200 mA
1.5 V
V
OUT(S)
2.5 V
0.20 0.30 V
2.6
V
V
OUT(S)
5.5 V
0.14 0.20
Line regulation
OUT
IN
OUT1
V
V
V
V
OUT(S)
+ 0.5 V V
IN
6.5 V,
I
OUT
= 30 mA
0.05
0.2
% / V
1
Load regulation
V
OUT2
V
IN
= V
OUT(S)
+ 1.0 V,
1.0 mA
I
OUT
200 mA
20 40 mV
Output voltage
temperature coefficient
*4
OUT
OUT
V
Ta
V
V
IN
= V
OUT(S)
+ 1.0 V, I
OUT
= 30 mA,
-40C Ta 85C
100
ppm
/
C
Current consumption
during operation
I
SS1
V
IN
= V
OUT(S)
+ 1.0 V, ON/OFF pin = ON,
no load
35 65 A 2
Current consumption
during shutdown
I
SS2
V
IN
= V
OUT(S)
+ 1.0 V, ON/OFF pin = OFF,
no load
0.1 1.0
Input voltage
V
IN
2.0
6.5 V
Shutdown pin
input voltage "H"
V
SH
V
IN
= V
OUT(S)
+ 1.0 V, R
L
= 1.0 k 1.5
4
Shutdown pin
input voltage "L"
V
SL
V
IN
= V
OUT(S)
+ 1.0 V, R
L
= 1.0 k
0.3
Shutdown pin
input current "H"
I
SH
V
IN
= 6.5 V, V
ON/OFF
= 6.5 V
-0.1
0.1 A
Shutdown pin
input current "L"
I
SL
V
IN
= 6.5 V, V
ON/OFF
= 0 V
-0.1
0.1
Ripple rejection
RR
V
IN
= V
OUT(S)
+ 1.0 V, f = 1.0 kHz,
V
rip
= 0.5 Vrms, I
OUT
= 30 mA
70 dB 5
Short-circuit current
I
short
V
IN
= V
OUT(S)
+ 1.0 V, ON/OFF pin = ON,
V
OUT
= 0 V
350 mA 3
*1. V
OUT(S)
: Specified output voltage
V
OUT(E)
: Actual output voltage at the fixed load
The output voltage when fixing I
OUT
(
= 30 mA) and inputting V
OUT(S)
+ 1.0 V
*2. The output current at which the output voltage becomes 95% of V
OUT(E)
after gradually increasing the output current.
*3. V
drop
= V
IN1
- (V
OUT3
0.98)
V
OUT3
is the output voltage when V
IN
= V
OUT(S)
+ 1.0 V and I
OUT
= 200 mA.
V
IN1
is the input voltage at which the output voltage becomes 98% of
V
OUT3
after gradually decreasing the input
voltage.
*4. The change in temperature [mV/C] is calculated using the following equation.
[
]
[ ]
[
]
1000
C
ppm/
V
Ta
V
V
V
C
mV/
Ta
V
OUT
OUT
OUT(S)
OUT
=
3
*
2
*
*1
*1. The change in temperature of the output voltage
*2.
Specified output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the
power dissipation of the package when the output current is large.
This specification is guaranteed by design.