IRU1117-18 [INFINEON]
800mA LOW DROPOUT POSITIVE FIXED 1.8V REGULATOR; 800毫安低压差正固定的1.8V稳压器
| 型号： | IRU1117-18 |
| 厂家： | 
Infineon |
| 描述： | 800mA LOW DROPOUT POSITIVE FIXED 1.8V REGULATOR |
| 文件： | 总4页 (文件大小：78K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet No. PD94137
IRU1117-18
800mA LOW DROPOUT POSITIVE
FIXED 1.8V REGULATOR
FEATURES
DESCRIPTION PRELIMINARY DATA SHEET
Guaranteed < 1.2V Dropout at 800mA Load
Current
The IRU1117-18 is a low dropout three-terminal fixed out-
put regulator with minimum of 800mA output current ca-
pability. This product is specifically designed to provide
well regulated supply for low voltage IC applications as
well as generating clock supply for PC applications. The
IRU1117-18 is guaranteed to have <1.2V dropout at full
load current making it ideal to provide well regulated with
3.8V input supply. The IRU1117-18 is specifically de-
signed to be stable with low cost aluminum capacitors
while maintaining stability with low ESR tantalum caps.
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-In Thermal Shutdown
Available in SOT-223, D-Pak, Ultra Thin-Pak and
8-Pin SOIC Surface-Mount Packages
APPLICATIONS
Low Voltage IC Supply Applications
PC Clock Supply Voltage
TYPICAL APPLICATION
3.3V
C1
10uF
Vin
3
2
1
IRU1117-18
Vout
Gnd
1.8V / 800mA
C2
10uF
Figure 1 - Typical set-up of the IRU1117-18 in a 3.3V to 1.8V regulator application
PACKAGE ORDER INFORMATION
Tj (°C)
2-PIN PLASTIC
TO-252 (D-Pak)
IRU1117-18CD
3-PIN PLASTIC
2-PIN PLASTIC
Ultra Thin-Pak (P)
IRU1117-18CP
8-PIN PLASTIC
SOIC (S)
SOT-223 (Y)
0 To 125
IRU1117-18CY
IRU1117-18CS
Rev. 1.1
06/29/01
1
IRU1117-18
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) .................................................... 7V
Power Dissipation ..................................................... Internally Limited
Storage Temperature Range ...................................... -65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 125°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
3-PIN PLASTIC SOT-223 (Y)
2-PIN ULTRA THIN-PAK (P)
8-PIN PLASTIC SOIC (S)
FRONT VIEW
FRONT VIEW
TOP VIEW
TOP VIEW
3
3
Vin
Vin
1
2
3
4
8
7
6
5
Vin
NC
Vout
Vout
Vout
Vout
3
Vin
Tab is
Vout
Tab is
Vout
Tab is
2
Vout
Vout
NC
1
Gnd
Gnd
1
1
Gnd
Gnd
θJA=70°C/W for 0.5" Sq pad
θJA=90°C/W for 0.4" Sq pad
θJA=70°C/W for 0.5" Sq pad
θJA=55°C/W for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cin=1µF, Vin=5V,Cout=10µF, and Tj=0 to 125ꢀC.
Typical values refer to Tj=25ꢀC.
PARAMETER
SYM
TEST CONDITION
Io=10mA, Tj=25ꢀC
Io=10mA
Io=10mA, 4.75V<Vin<7V
10mA<Io<800mA
Io=1A
Io=800mA
dVo=100mV
30ms Pulse, Io=800mA
f=120Hz, Co=25µF Tantalum,
Io=0.5A
Io=10mA
Tj=125ꢀC, 1000Hrs
Tj=25ꢀC, 10Hz<f<10KHz
MIN
TYP
MAX
UNITS
Output Voltage
Vo
1.782 1.800 1.818
V
1.764 1.800 1.896
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
7
mV
mV
V
17
1.2
1.1
1.3
1.2
Current Limit
Thermal Regulation
Ripple Rejection
1.1
A
%/W
0.01
70
0.5
dB
%
Temperature Stability
Long Term Stability
RMS Output Noise
0.3
%
0.003
%Vo
Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data.
Note 2: Dropout voltage is defined as the minimum differential voltage between Vin and Vout required to maintain
regulation at Vout. It is measured when the output voltage drops 1% below its nominal value.
Rev. 1.1
2
06/29/01
IRU1117-18
PIN DESCRIPTIONS
PIN# PIN SYMBOL PIN DESCRIPTION
Ground pin. This pin must be connected to ground plane using a low inductance short
connection.
1
2
3
Gnd
Vout
Vin
The output of the regulator. This pin is also connected to the tab of the package. An output
capacitor must be connected to this pin to insure stability of the regulator.
Input pin of the regulator. Typically a large storage capacitor is connected from this pin to
ground to insure that the input voltage does not sag below the minimum dropout voltage
during the load transient response. This pin must always be 1.3V higher than Vout in order
for the device to regulate properly.
BLOCK DIAGRAM
Vin 3
2 Vout
+
+
1.25V
CURRENT
LIMIT
THERMAL
1 Gnd
SHUTDOWN
1117-18blk1-1.0
Figure 2 - Simplified block diagram of the IRU1117-18
Rev. 1.1
06/29/01
3
IRU1117-18
Notes
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 02/01
Rev. 1.1
06/29/01
4
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