ACE557U [ACE]
250mA, Low Consumption, Wide Input Voltage Linear Regulator;
| 型号： | ACE557U |
| 厂家： | 
ACE TECHNOLOGY CO., LTD. |
| 描述： | 250mA, Low Consumption, Wide Input Voltage Linear Regulator |
| 文件： | 总5页 (文件大小：312K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACE557U
250mA, Low Consumption, Wide Input Voltage Linear Regulator
Description
The ACE557U series are a group of positive voltage output, high precise and low power consumption
voltage regulators. The maximum input voltage is 16V. The output voltages are available in 100mV steps
within a range of 2.5V to 5V. It can also be customized on request.
The ACE557U series have very low power consumption (IQ=2μA) which can greatly extend battery life.
The ACE557U series are available in SOT23-5 & SOT89-5 packages.
Features
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Maximum Input Voltage: 16V
Low Quiescent Current: 2μA (Typ.)
Maximum Output Current: 250mA
Low Dropout: 210mV@100mA (VOUT=3.3V)
420mV@200mA (VOUT=3.3V)
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Low Temperature Coefficient: ±150ppm/°C
Output Current Limit: 330mA@ VOUT=3.3V
Application
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Battery-Powered Equipment
Power Management of MP3, PDA, DSC, Mouse, PS2 Games
Reference Voltage Source
Hand-Hold Equipment
Absolute Maximum Rating
Parameter
Symbol
Value
18
Unit
V
VIN
Max Input Voltage
SOT-23-5
SOT-89-5
PD
PD
300
mW
mW
°C
Power dissipation
1200
Operating Junction Temperature
Ambient Temperature
TJ
125
TA
-40 to 85
-40 to 150
260
°C
TSTG
Storage Temperature Range
°C
Lead Temperature for Soldering 10 Seconds
TL
°C
Recommended Work Condition
Symbol
Parameter
Value
Unit
VIN
Max Input Voltage
16
V
VER 1.2
1
ACE557U
250mA, Low Consumption, Wide Input Voltage Linear Regulator
Packaging Type
SOT-23-5/SOT-23-5A
SOT-89-5
Ordering information
ACE557U XX XX + H
Halogen - free
Pb - free
BN: SOT-23-5
BNA: SOT-23-5A
AN: SOT-89-5
Output Voltage：2.5V/ 2.6V /…../5.0V / Default： Adjustable Version
VER 1.2
2
ACE557U
250mA, Low Consumption, Wide Input Voltage Linear Regulator
Typical Application Circuit
Figure 1
Figure 2
Note 1: Input Capacitor (CIN=1μF) is recommended in all applications.
Note 2: Output Capacitor (COUT=4.7μF/6.8μF) is recommended in all applications to assure the stability of
circuit.
ACE557U Output Voltage Setting
The output voltage of the ACE557U adjustable regulator is programmed using an external resistor divider
as shown in Figure 2. The output voltage is calculated using:
Where: VFB=1.2V (Typ) (the internal reference voltage)
Resistors R1 and R2 should be chosen for approximately 3-5μAdivider current. Lower value resistors can
be used but offer no inherent advantage and waste more power. Higher values should be avoided, as
leakage currents at FB increase the output voltage error. The recommended design procedure is to
choose R2=200kΩ to set the divider current at 5μA and then calculate R1 using:
Where: VFB=1.2V (Typ).
VER 1.2
3
ACE557U
250mA, Low Consumption, Wide Input Voltage Linear Regulator
Packing Information
SOT-89-5
DIMENSIONS
MILLIMETERS
INCHES
Typ
Symbol
Min
1.40
0.32
0.38
0.35
4.40
1.40
2.30
Typ
Max
Min
Max
A
b
1.50
1.60
0.54
0.62
0.44
4.60
1.83
2.60
0.055
0.013
0.015
0.014
0.173
0.055
0.091
0.059
0.063
0.021
0.024
0.017
0.181
0.072
0.102
b1
c
D
D1
E
4.50
0.177
2.50
0.098
e
1.50TYP
0.059TYP
L
0.65
1.20
0.026
0.047
VER 1.2
4
ACE557U
250mA, Low Consumption, Wide Input Voltage Linear Regulator
Notes
ACE does not assume any responsibility for use as critical components in life support devices or systems
without the express written approval of the president and general counsel of ACE Technology Co., LTD.
As sued herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and shoes failure to perform when properly used in
accordance with instructions for use provided in the labeling, can be reasonably expected to result in
a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can
be reasonably expected to cause the failure of the life support device or system, or to affect its safety
or effectiveness.
ACE Technology Co., LTD.
http://www.ace-ele.com/
VER 1.2
5
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