CYT8117TALF [ETC]
1A Positive Voltage Regulators; 1A正电压稳压器
| 型号： | CYT8117TALF |
| 厂家： | 
ETC |
| 描述： | 1A Positive Voltage Regulators |
| 文件： | 总6页 (文件大小：171K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
1A Positive Voltage
Regulators (Preliminary)
CYT8117
Description
Features
¾
¾
¾
¾
Low Dropout Performance.
The CYT8117 series of high performance low dropout
voltage regulators are designed for applications that
require efficient conversion and fast transient
response.
Guaranteed 1A Output Current.
Wide Input Supply Voltage Range.
Over-temperature and Over-current
Protection.
¾
¾
¾
Fixed or Adjustable Output Voltage.
Rugged 3KV ESD withstand capability.
Available in SOT-223 Packages.
Pin Configuration
Tab is Vout
2
3
1
Application
¾
Active SCSI Terminators.
In
Adj/Gnd
Out
Front View
¾
¾
¾
High Efficiency Linear Regulators.
5V to 3.3V Linear Regulators
Motherboard Clock Supplies.
SOT-223
Ordering Information
Device
Package
VOUT Volts
Fixed output voltages; XX denotes voltage options (1.5V, 1.8V, 2.5V,
3.0V, and 3.3V).
CYT8117TXX
CYT8117TA
SOT-223
Adjustable output voltage.
Fixed output voltages; XX denotes voltage options (1.5V, 1.8V, 2.5V,
3.0V, and 3.3V).
CYT8117TXXLF
CYT8117TALF
SOT-223
(Lead-free)
Adjustable output voltage.
Absolute Maximum Rating
Symbol
Parameter
Maximum
Units
VIN
Input Supply Voltage
9
V
θJA
Thermal Resistance Junction to Ambient
SOT-223
60
°C/W
°C
TJ
Operating Junction Temperature Range
Storage Temperature Range
0 to 125
TSTG
TLEAD
-40 to 150
260
°C
°C
Lead Temperature (Soldering 10 Sec)
Preliminary and all contents are subject to change without prior notice.
1
1A Positive Voltage
Regulators (Preliminary)
CYT8117
Electrical Characteristic
VIN,MAX ≤ 8V, VIN,MIN – VOUT = 1.5V, IOUT = 10mA, CIN = 10µF, COUT = 22µF, TJ = 0 – 125°C, unless otherwise specified.
Symbol
Parameter
Test Condition
Min
Typ
Max
Units
(VIN - VOUT) = 1.5V, IOUT = 10mA,
TA = 25°C,
CYT8117T15
1.5
1.8
2.5
3.0
3.3
VO
Output Voltage (1)
CYT8117T18
(-2%)
(+2%)
V
CYT8117T25
CYT8117T30
CYT8117T33
Reference Voltage (1)
(Adj. Voltage Version)
(VIN - VOUT) = 1.5V
IOUT = 10mA
VREF
VSR
VLR
(-2%) 1.250 (+2%)
V
V
OUT + 1.5V < VIN < 8V
Line Regulation (1)
Load Regulation (1)
--
--
0.3
0.4
--
--
%
%
IOUT = 10mA
(VIN - VOUT) = 1.5V
10mA ≤ IOUT ≤ 1A
IQ
Quiescent Current
Adjust Pin Current
Fixed Output Version
--
--
10
48
--
--
mA
IADJ
µA
Adjust Pin Current
Change
V
OUT + 1.5V < VIN < 8V
10mA ≤ IOUT ≤ 1A
∆IADJ
--
0.2
--
µA
VD
IO
Dropout Voltage (2)
Minimum Load Current
Current Limit
∆VREF = 1%, IOUT = 1A
--
--
--
--
--
--
1.1
4
--
--
--
--
--
--
V
mA
A
ICL
1.8
TC
Temperature Coefficient
Thermal Protection
RMS Output Noise
0.07
175
0.003
%/°C
°C
OTP
VN
TA = 25°C, 10Hz ≤ f ≤ 10kHz
%VO
f = 120Hz,
RA
Ripple Rejection Ratio
COUT = 22µF (Tantalum),
(VIN - VOUT) = 3V, IOUT = 1A
--
35
--
dB
Notes:
1. Low duty cycle pulse testing with which TJ remains unchanged.
2. ∆VOUT, ∆VREF = 1%.
Preliminary and all contents are subject to change without prior notice.
2
1A Positive Voltage
Regulators (Preliminary)
CYT8117
Typical Application
Adjustable Voltage Regulator
VIN >= 3.0V
3
2
VOUT = 1.5V
CYT8117TA
R1
124 Ohm
VREF
1
CIN
10uF
COUT
22uF
IADJ
R2
24.9 Ohm
Fixed Voltage Regulator
VIN >= 4.8V
3
2
VOUT = 3.3V
CYT8117T33
CIN
10uF
COUT
22uF
1
IQ
Preliminary and all contents are subject to change without prior notice.
3
1A Positive Voltage
Regulators (Preliminary)
CYT8117
Application Hints
Thermal Considerations
Like any linear voltage regulator, CYT8117 requires
It is important that the thermal limit of the package
external capacitors to ensure stability.
The
is not exceeded. The CYT8117 has built-in
external capacitors must be carefully selected to
ensure performance.
thermal protection. When the thermal limit is
exceeded, the IC will enter protection, and VOUT
will be pulled to ground. The power dissipation
for a given application can be calculated as
following:
Input Capacitor
An input capacitor of at least 10µF is required.
Ceramic or Tantalum can be used. The value
can be increase without upper limit.
The power dissipation (PD) is
PD = IOUT * [VIN – VOUT
]
Output Capacitor
An output capacitor is required for stability. It
must be placed no more than 1 cm away from the
VOUT pin, and connected directly between VOUT
and GND pins. The minimum value is 22µF but
may be increase without limit.
The thermal limit of the package is then limited to
PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction
temperature, TA is the ambient temperature, and
ΘJA is around 60°C/W for CYT8117.CYT8117 is
designed to enter thermal protection at 175°C.
For example, if TA is 25°C then the maximum PD
is limited to about 2.5W. In other words, if
IOUT(MAX) = 1A, then [VIN – VOUT] cannot exceed
2.5V.
Preliminary and all contents are subject to change without prior notice.
4
1A Positive Voltage
Regulators (Preliminary)
CYT8117
Typical Performance Characteristics
Line Transients
Reference Voltage vs Junction Temperature
1250
VIN = 4.5V – 5.5 V
1245
1240
1235
1230
1225
1220
CIN = 0.1µF, COUT = 1µF
-25
0
25
50
75
100 125 150
Junction Temperature (C)
Output Voltage vs Junction Temperature
Load Transients
3.70
3.65
3.60
3.55
3.50
3.45
3.40
3.35
3.30
3.25
3.20
ILOAD = 10mA – 1A
COUT = 22µF, CIN = 10µF
-25
0
25
50
75
100 125 150
Junction Temperature (C)
Dropout Voltage vs Output Current
1.14
1.12
1.1
1.08
1.06
1.04
1.02
1
0
200
400
600
800
1000
Output Current (mA)
Preliminary and all contents are subject to change without prior notice.
5
1A Positive Voltage
Regulators (Preliminary)
CYT8117
Outline Drawing for SOT-223
Preliminary and all contents are subject to change without prior notice.
6
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