Description
The SE8117B series of high performance low
dropout
voltage
regulators
are
designed
for
applications that require efficient conversion and
fast transient response.
In addition, SE8117B is designed to be stable under
conditions where Cin and Cout are not present.
However, it is recommended to include Cin and
Cout in the system design as this will increase the
PSRR rating. SE8117B is characterized under
Junction Temperature from -40°C to +130°C.
Features
Low Dropout Performance.
Low Quiescent Current：3mA（Typ.）
Guaranteed 1A Output Current.
Wide Input Supply Voltage Range.
Stable operation without Cin and Cout.
Over-temperature and Over-current Protection.
Fixed or Adjustable Output Voltage.
Rugged 2KV ESD withstand capability.
Available in SOT-223 and TO252 Packages.
RoHS Compliant and 100% Lead (Pb)-Free
Application
Pin Configuration
Active SCSI Terminators.
High Efficiency Linear Regulators.
5V to 3.3V Linear Regulators
Motherboard Clock Supplies.
Ordering Information
Device
Marking
Information
SE8117TXXLF
SE8117TALF
Package
V
OUT
Fixed output voltages; XX denotes voltage options
(1.5V,1.8V, 2.5V,3.3V and 5.0V).
Adjustable output voltage.
SE8117BTXXLF
SE8117BTALF
SOT-223 TO-252
(Lead-free)
Absolute Maximum Rating
Symbol
V
IN
θ
JA
T
J
T
STG
T
LEAD
Parameter
Input Supply Voltage
Thermal Resistance Junction to Ambient (SOT-223)
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering 10 Sec)
Maximum
9
60
-40 to 130
-40 to 150
260
Units
V
°C/W
°C
°C
°C
Revision 7/28/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com • Page 1
Electrical Characteristic
V
IN,MAX
≤
8V, V
IN,MIN
– V
OUT
= 1.5V, I
OUT
= 10mA, C
IN
= 10µF, C
OUT
= 22µF, T
A
= 25°C, unless otherwise
specified.
Symbol
Parameter
Test Condition
SE8117BT15
SE8117BT18
V
O
Output Voltage
(1)
Min
1.470
1.764
2.450
3.234
4.900
(-2%)
--
--
--
--
Typ
1.5
1.8
2.5
3.3
5.0
Max
1.530
1.836
2.550
3.366
5.100
Units
SE8117BT25
SE8117BT33
SE8117BT50
V
V
REF
V
SR
V
LR
I
Q
I
ADJ
∆I
ADJ
V
D
I
O
I
CL
T
C
OTP
V
N
R
A
Notes:
Reference Voltage
(1)
(Adj. Voltage Version)
Line Regulation
(1)
Load Regulation
(1)
Quiescent Current
(2)
Adjust Pin Current
Adjust Pin Current
Change
Dropout Voltage
(3)
Minimum Load Current
Current Limit
Temperature Coefficient
Thermal Protection
RMS Output Noise
Ripple Rejection Ratio
(V
IN
- V
OUT
) = 1.5V
I
OUT
= 10mA
V
OUT
+ 1.5V < V
IN
< 8V
I
OUT
= 10mA
(V
IN
- V
OUT
) = 1.5V
10mA
≤
I
OUT
≤
1A
Fixed Output Version
1.250 (+2%)
0.3
0.5
3
65
14
1.3
0.4
1.8
0.07
175
0.003
57
--
--
--
--
--
--
--
--
--
--
--
--
V
%
%
mA
μA
μA
V
mA
A
%/°C
°C
%V
O
dB
V
OUT
+ 1.5V < V
IN
< 8V
10mA
≤
I
OUT
≤
1A
I
OUT
= 1A
--
--
--
--
--
--
T
A
= 25°C, 10Hz
≤
f
≤
10kHz
f = 120Hz,
C
OUT
= 22μF (Tantalum),
(V
IN
- V
OUT
) = 3V, I
OUT
= 100mA
--
--
1. Low duty cycle pulse testing with which T
J
remains unchanged.
2. The I
Q
of SE8117BT15 is 1.2mA(Typ.)
3.
The dropout voltage is the input/output differential at which the circuit ceases to regulate against further
reduction in input voltage. It is measured when the output voltage has dropped 98% from the nominal
value obtained at V
IN
= V
OUT
+1.5V.
Revision 7/28/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com • Page 2
Typical Performance Characteristics
Reference Voltage vs Junction Temperature
1250
1245
1240
1235
1230
1225
1220
-25
0
25
50
75
100 125 150
Junction Temperature (C)
Dropout Voltage vs. Output Current
1.17
Dropout Voltage (V)
1.15
Reference Voltage (mV)
1.11
1.09
1.07
1.05
1.03
0
200
400
600
800
Output Current(mA)
1000
PSRR (dB)
1.13
70
60
50
40
30
20
10
0
0.001
PSRR
I
OUT
= 100mA
0.01
0.1
1
Frequency (kHz)
Load Transients
10
Line Transients
V
IN
= 4.5V – 5.5 V
C
IN
= 0.1μF, C
OUT
= 1μF
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
0
200
Load Regulation
SE8117B_3.3V
SE8117B_1.8V
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
3
4
5
Line Regulation
V o u t (V )
V o u t (V )
SE8117B_3.3
SE8117B_1.8
400
600
Iload (mA)
800
1000
6
7
8
9
Vin (V)
10
11
12
Revision 7/28/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com • Page 4
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