SE5117ASG [ESTEK]
Efficient linear voltage regulator; 高效的线性电压调节器
| 型号： | SE5117ASG |
| 厂家： | 
Estek Electronics Co. Ltd |
| 描述： | Efficient linear voltage regulator |
| 文件： | 总6页 (文件大小：221K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SE5117
Description
Features
Typical 90mV dropout voltage at 150mA.
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%.
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.
The SE5117 has low ground current, so it can
help prolong battery life. The SE5117 is specially
designed for hand-held, battery-powered devices.
Standard SOT-223 package.
Pin Configuration
Application
Front View
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
to 2.5V.
Ordering Information
SE5117 _ _ _
PIN (1=>3): 1. G: OUT/GND/IN
Package Type: 1. S: SOT-
Output Voltage: 1. A: VOUT = 3.3V
Application Diagram
3.3V
Vin
Vout
M0
5V
2. B: VOUT = 2.8V
C1
C=10u
R2
3. C: VOUT = 2.5V
C0
C=10u
rload
4. D: VOUT = 1.8V
Control
Logic
gnd
5. E: VOUT = 1.5V
gnd
6. F: VOUT = 3.0V
Over Current
Protection
Thermal
Protection
1.25V Ref
gnd
BEIJING ESTEK ELECTRONICS CO.,LTD
1
SE5117
Absolute Maximum Rating
Parameter
Symbol
Value
-0.7 to +7
Unit
V
Supply Input Voltage
Power Dissipation
VIN
PD
TJ
Internally Limited(3)
--
Junction Temperature
Lead Temperature
0 to +125
°C
TLEAD
TSTG
260
°C
°C
(soldering, 5 sec.)
Storage Temperature
-10 to +150
Operating Ratings(2)
Parameter
Symbol
Value
Unit
V
Supply Input Voltage
Junction Temperature
Package Thermal
Resistance
VIN
TJ
+2.5 to +6
0 to +125
°C
θJA
135 (SOT-223) °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 TA (ambient temperature) is calculated using: PD(max) = (TJ(max) - TA)/θJA
.
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.
BEIJING ESTEK ELECTRONICS CO.,LTD
2
SE5117
Electrical Characteristics
VIN = VOUT + 1.0V (VIN,MIN = 3V); COUT = 4.7µF, IOUT =100µA; TJ =25°C, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
10mA ≤ IOUT ≤ 1A, TA=25°C,
SE5117-1.5, 3.0V ≤ VIN ≤ 5.5V
SE5117-1.8, 3.0V ≤ VIN ≤ 5.5V
SE5117-2.5, 3.5V ≤ VIN ≤ 5.5V
SE5117-2.8, 3.8V ≤ VIN ≤ 5.5V
SE5117-3.0, 4.0V ≤ VIN ≤ 5.5V
SE5117-3.3, 4.3V ≤ VIN ≤ 5.5V
1.470
1.764
2.450
2.744
2.940
3.234
1.530
1.836
2.550
2.856
3.060
3.366
1.5
1.8
2.5
2.8
3.0
3.3
V
V
V
V
V
Output Voltage
VOUT
Accuracy
Output Voltage
Temperature Coefficient
Line Regulation
Note 4
--
40
--
∆
VOUT /∆T
∆
VOUT / VOUT
VOUT / VOUT
VIN = VOUT + 1V to 5.5V
IOUT =10mA to 1A(5)
--
--
0.3
--
%
--
∆
Load Regulation(5)
%
0.5
IOUT =10mA
--
9
--
--
mV
VOUT<2V
IOUT =500mA
--
--
530
Dropout
(6V) oltage
IOUT =1A
--
1050
VIN - VOUT
IOUT =10mA
--
--
--
5.5
mV
°C
VOUT>2V
IOUT =150mA
--
90
IOUT =500mA
--
--
300
--
150 --
Temperature
Protection Hysterisys
f =120Hz
TPROTECTION
Thermal Protection
--
--
30
75
--
°C
dB
--
PSRR
Ripple Rejection
Ground Current
--
IGROUND
IOUT=10mA
mA
--
1
BEIJING ESTEK ELECTRONICS CO.,LTD
3
SE5117
Application Hints
Thermal Consideration
Like any Low dropout regulator, SE5117 requires
external capacitors to ensure stability. The external
capacitors must be carefully selected to ensure the
performances.
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 VOUT
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.
The Power Dissipation (PD) is
Ceramic or Tantalum can be used. The value can
be increased without upper limit.
PD = IOUT * [VIN – VOUT
]
Output Capacitor:
The thermal limit of the package is then limited to
PD(MAX) = [TJ – TA]/θJA where TJ is the junction
temperature, TA is ambient temperature, and θJA is
around 135°C/W for SE5117. SE5117 is designed
An Output Capacitor is required for look stability. It
must be located no more than 1cm away from the
VOUT pin, and connected directly between VOUT and
GND pins. The minimum value is 10uF but once
again its value can be increased without limit.
to enter thermal protection at 150°C. For example, if
TA is 25°C then the max PD is limited to about 1W. In
other words, if IOUT(MAX) = 1A, then [VIN – VOUT] can
not exceed 1V.
4
BEIJING ESTEK ELECTRONICS CO.,LTD
SE5117
5
BEIJING ESTEK ELECTRONICS CO.,LTD
SE5117
BEIJING ESTEK ELECTRONICS CO.,LTD
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