SE5117
Description
The
SE5117
is
an
efficient
linear
voltage regulator. It has extra low dropout voltage.
At light loads the typical dropout voltage is 5.5mV,
and at full load the typical dropout voltage is
650mV. The output voltage accuracy is better than
2%.
The SE5117 has low ground current, so it can
help prolong battery life. The SE5117 is specially
designed for hand-held, battery-powered devices.
Features
Typical 90mV dropout voltage at 150mA.
Guaranteed 1A output over the full operating
temperature range.
650mV typical dropout voltage at full load.
Extremely tight load and line regulation.
Low temperature coefficient.
Current and thermal limiting.
No-load stability.
Standard SOT-223 package.
Pin Configuration
Front View
Application
Active SCSI terminators.
Post regulators for switching supplies.
Battery chargers.
1
2
3
High-efficiency linear power supplies.
Computer motherboard, display, graphic card
DC/DC converter, such as 3.3V to 2.8V or 3.3V
SOT-223
to 2.5V.
Ordering Information
SE5117 _ _ _
PIN (1=>3): 1. G: OUT/GND/IN
Application Diagram
Package Type: 1. S: SOT-
223
Output Voltage: 1. A: V
OUT
= 3.3V
5V
Vin
C0
C=10u
M0
Vout
C1
C=10u
3.3V
R2
rload
2. B: V
OUT
= 2.8V
3. C: V
OUT
= 2.5V
4. D: V
OUT
= 1.8V
gnd
Control
Logic
gnd
5. E: V
OUT
= 1.5V
6. F: V
OUT
= 3.0V
1.25V Ref
Over Current
Protection
Thermal
Protection
gnd
1
BEIJING ESTEK ELECTRONICS CO.,LTD
SE5117
Absolute Maximum Rating
Parameter
Supply Input Voltage
Power Dissipation
Junction Temperature
Lead Temperature
(soldering, 5 sec.)
Storage Temperature
T
LEAD
T
STG
-10 to +150
260
°
C
°
C
V
IN
P
D
T
J
Symbol
Value
-0.7 to +7
Internally Limited
(3)
0 to +125
Unit
V
--
°
C
Operating Ratings
(2)
Parameter
Supply Input Voltage
Junction Temperature
Package Thermal
Resistance
V
IN
T
J
θ
JA
Symbol
Value
+2.5 to +6
0 to +125
135 (SOT-223)
Unit
V
°
C
°
C/W
Note 1:
Exceeding the absolute maximum rating may damage the device.
Note 2:
The device is not guaranteed to function outside its operating rating.
Note 3:
The maximum allowable power dissipation at any T
A
(ambient temperature) is calculated using: P
D(max)
= (T
J(max)
- T
A
)/θ
JA
.
Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into
thermal shutdown. See the “
Thermal Considerations”section for details.
Note 4:
Output voltage temperature coefficient is the worst-case voltage change divided by the total temperature
range.
Note 5:
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load
regulation in the load range from 100µA to 1A. Changes in output voltage due to heating effects are covered by the thermal
regulation specification.
Note 6:
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value
measured at 1V differential.
2
BEIJING ESTEK ELECTRONICS CO.,LTD
SE5117
Electrical Characteristics
V
IN
= V
OUT
+ 1.0V (V
IN,MIN
= 3V); C
OUT
= 4.7µF, I
OUT
=100µA; T
J
=25° unless otherwise specified.
C,
Symbol
Parameter
Conditions
10mA
≤
I
OUT
≤
1A, T
A
=25°
C,
SE5117-1.5, 3.0V
≤
V
IN
≤
5.5V
SE5117-1.8, 3.0V
≤
V
IN
≤
5.5V
SE5117-2.5, 3.5V
≤
V
IN
≤
5.5V
SE5117-2.8, 3.8V
≤
V
IN
≤
5.5V
SE5117-3.0, 4.0V
≤
V
IN
≤
5.5V
SE5117-3.3, 4.3V
≤
V
IN
≤
5.5V
Note 4
V
IN
= V
OUT
+ 1V to 5.5V
I
OUT
=10mA to 1A
I
OUT
=10mA
(5)
Min
1.470
1.764
2.450
2.744
2.940
3.234
Typ
1.5
1.8
2.5
2.8
3.0
3.3
Max
1.530
1.836
2.550
2.856
3.060
3.366
40
--
0.5
Units
V
OUT
Output Voltage
Accuracy
V
V
V
V
V
∆V
OUT
/∆T
∆V
OUT
/ V
OUT
∆V
OUT
/ V
OUT
Output Voltage
Temperature Coefficient
Line Regulation
Load Regulation
(5)
%
V
OUT
<2V
I
OUT
=500mA
Dropout
--
--
--
--
--
--
--
--
300
530
1050
5.5
mV
90
--
150 --
--
--
--
--
1.5
1
--
I
OUT
=1A
--
I
OUT
=10mA
--
I
OUT
=150mA
--
I
OUT
=500mA
--
ppm/°
C
--
--
--
9
0.3
--
%
--
--
mV
V
IN
- V
OUT
(6)
Voltage
V
OUT
>2V
T
PROTECTION
Thermal Protection
Temperature
Protection Hysterisys
°
C
°
C
dB
--
--
30
75
PSRR
I
GROUND
I
Ripple Rejection
Ground Current
Current Limit
f =120Hz
I
OUT
=10mA
mA
V
=0V
3
BEIJING ESTEK ELECTRONICS CO.,LTD
SE5117
Application Hints
Like any Low dropout regulator, SE5117 requires
external capacitors to ensure stability. The external
capacitors must be carefully selected to ensure the
performances.
Thermal Consideration
It is important that the thermal limit of the package
should not be exceeded. The SE5117 has built-in
thermal protection. When the thermal limit is
exceeded, the IC will enter protection, and the V
OUT
will be reset to zero. The power dissipation for a
given application can be calculated as follows:
Input Capacitor:
An Input Capacitor of at least 10uF is required.
Ceramic or Tantalum can be used. The value can
be increased without upper limit.
The Power Dissipation (P
D
) is
P
D
= I
OUT
* [V
IN
–V
OUT
]
Output Capacitor:
An Output Capacitor is required for look stability. It
must be located no more than 1cm away from the
V
OUT
pin, and connected directly between V
OUT
and
GND pins. The minimum value is 10uF but once
again its value can be increased without limit.
The thermal limit of the package is then limited to
P
D(MAX)
= [T
J
–T
A
]/θ
JA
where T
J
is the junction
temperature, T
A
is ambient temperature, and
θ
JA
is
around 135°
C/W for SE5117. SE5117 is designed
to enter thermal protection at 150° For example, if
C.
T
A
is 25° then the max P
D
is limited to about 1W. In
C
other words, if I
OUT(MAX)
= 1A, then [V
IN
–V
OUT
] can
not exceed 1V.
4
BEIJING ESTEK ELECTRONICS CO.,LTD
SE5117
5
BEIJING ESTEK ELECTRONICS CO.,LTD
京公网安备 11010802033920号
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