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IL1117C-xxLow Dropout Positive Voltage Regulator TECHNICAL DATA
Description
The IL1117C is a series of low dropout voltage
regulators which can provide up to 1A of output current. The IL1117C is available in eight fixed voltage, 1.2,
1.25, 1.5, 1.8, 2.5, 2.85, 3.3 and 5.0V. Additionally it is
also available in adjustable version. On chip precision
trimming adjusts the reference/ output voltage to within ±
2%. Current limit is also trimmed to ensure specified
output current and controlled short-circuit current.
The IL1117C series is available in SOT-223, TO252, TO-220 packages.
A minimum of 10uF tantalum capacitor is required
at the output to improve the transient response and
Stability.
SOT-223
IL1117C-xxET
TO-252
IL1117C-xxD0T
TO-220
Features









Dropout Voltage – 1.2V(Typ)
Reference/Output Voltage Trimmed to ± 2%
Maximum Input Voltage – 15V
Adjustable Output Voltage or Fixed
1.2V, 1.25V, 1.5V, 1.8V, 2.5V, 2.85V, 3.3V, 5V
Line Regulation typically at 0.2% max
Load Regulation typically at 0.4% max
Current Limiting and Thermal Protection
Standard 3-Pin Power Packages
Operating Junction Temperature Range
-40 to +125°C
(for IL1117C-1.2V - 0 to +150°C)
1. ADJ/GND
2. Output
3. Input
Pin#2 connected
with heat sink
IL1117C-xxKB
ORDERING INFORMATION
Applications
Post Regulator for switching DC/DC Converter
● High Efficiency Linear Regulator
● Battery Chargers
● PC Add on Card
● Motherboard clock supplies
● LCD Monitor
● Set-top Box
Device
Package
Packing
IL1117CxxET
TO-223
Tape & Reel
IL1117CxxD0T
TO-252
Tape & Reel
IL1117C-xxKB
TO-220
Tube
●
Absolute Maximum Ratings
Symbol
VIN
IOUT
TJ
ΘJA
ΘJA
ΘJA
ΘJC
ΘJC
ΘJC
Description
Input Voltage
DC Output Current
Operating Junction Temperature Range
(* in case of IL1117C-1.2)
Thermal Resistance Junction-to-Ambient (SOT-223)
Thermal Resistance Junction-to-Ambient (TO-252)
Thermal Resistance Junction-to-Ambient (TO-220)
Thermal Resistance Junction-to-Case (SOT-223)
Thermal Resistance Junction-to-Case (TO-252)
Thermal Resistance Junction-to-Case (TO-220)
Max
15
PD/(VIN-VO)
-40 to 125
(* 0 to 150)
150
80
60
35
22
15
Units
V
mA
°C
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Feb 03, 2015, Ver. 07
IL1117C-XX
Electrical Characteristics
Tj = -40°C to +125°C ( for IL1117C-1.2 Tj = 0 to +150°C) unless otherwise specified
PARAMETER
OUTPUT VOLTAGE
IL1117C-1.2
IL1117C-1.25 (Adjustable)
IL1117C-1.5
IL1117C-1.8
IL1117C-2.5
IL1117C-2.85
IL1117C-3.3
IL1117C-5.0
LINE REGULATION
IL1117C-1.2
IL1117C-1.25 (Adjustable)
IL1117C-1.5
IL1117C-1.8
IL1117C-2.5
IL1117C-2.85
IL1117C-3.3
IL1117C-5.0
LOAD REGULATION
IL1117C-1.2
IL1117C-1.25 (Adjustable)
IL1117C-1.5
IL1117C-1.8
IL1117C-2.5
IL1117C-2.85
IL1117C-3.3
IL1117C-5.0
CONDITIONS
MIN
TYP
MAX
UNIT
1.176
1.225
1.470
1.764
2.450
2.790
3.240
4.900
1.200
1.250
1.500
1.800
2.500
2.850
3.300
5.000
1.224
1.280
1.530
1.836
2.550
2.910
3.360
5.100
V
Io =10mA, Vin = 2.7 to 12.0V
Io =10mA, Vin = 2.8 to 12.0V
Io =10mA, Vin = 3.0 to 12.0V
Io =10mA, Vin = 3.3 to 12.0V
Io =10mA, Vin = 4.0 to 12.0V
Io =10mA, Vin = 4.4 to 12.0V
Io =10mA, Vin = 4.8 to 12.0V
Io =10mA, Vin = 6.5 to 12.0V
2.0
0.1
2.0
2.0
2.0
2.0
3.0
4.0
7.0
0.2
7.0
7.0
7.0
7.0
7.0
10.0
mV
%
mV
mV
mV
mV
mV
mV
Io = 10mA to 1.0A, Vin
Io = 10mA to 1.0A, Vin
Io = 10mA to 1.0A, Vin
Io = 10mA to 1.0A, Vin
Io = 10mA to 1.0A, Vin
Io = 10mA to 1.0A, Vin
Io = 10mA to 1.0A, Vin
Io = 10mA to 1.0A, Vin
3.0
0.2
3.0
3.0
3.0
3.0
4.0
5.0
10.0
0.4
10.0
10.0
10.0
10.0
12.0
15.0
mV
%
mV
mV
mV
mV
mV
mV
Io = 10mA to 1.0A, Vin = 2.7 to 12.0V
Io = 10mA to 1.0A, Vin = 2.8 to 12.0V
Io = 10mA to 1.0A, Vin = 3.0 to 12.0V
Io = 10mA to 1.0A, Vin = 3.3 to 12.0V
Io = 10mA to 1.0A, Vin = 4.0 to 12.0V
Io = 10mA to 1.0A, Vin = 4.4 to 12.0V
Io = 10mA to 1.0A, Vin = 4.8 to 12.0V
Io = 10mA to 1.0A, Vin = 6.5 to 12.0V
= 3.2V
= 3.3V
= 3.5V
= 3.8V
= 4.5V
= 4.85V
= 5.3V
= 7.0V
DROPOUT VOLTAGE (2)
All Models
Io =1A (Tj = 25°C)
1.20
1.30
1.20
1.55
CURRENT LIMIT
Io =1A (Tj = -40°C to +125°C)
Vin - Vo = 5V (Tj = 25°C)
Minimum Load Current
Adjustable Models
Vin = 13.75V
QUIESCENT CURRENT
Vin - Vo = 1.5V
Adjust Pin Current
vs Load Current, IL1117C
TEMPERATURE DRIFT
RMS Output Noise
Ripple Rejection Ratio
1000
V
mA
5
mA
5.2
10
mA
Io = 10mA, Vin - Vo = 1.4 to 10V
Io = 10mA to 1A, Vin - Vo = 1.4 to 10V
Tj = -40°C to +125°C
50
0.5
0.5
120
5
uA
uA
%
Bandwidth of 10Hz to 10kHz at 25°C
120Hz input Ripple(Cadj for ADJ) =
25uF
Vin -Vo = 5V, Io = 1.0A
Tj = -40°C to +125°C
0.003
%Vo
72
dB
60
NOTES: (1) IL1117C-x adjustable versions require a minimum load current for ±3% regulation.
(2) Dropout voltage is the input voltage minus output voltage that produces a 1% decrease in
output voltage.
Feb 03, 2015 Ver. 07
IL1117C-XX
Block Diagram
Application Information
IL1117C
FIGURE 1. Fixed-Voltage Model
—Basic Connections.
IL1117C
(Adj)
FIGURE 2. Adjustable-Voltage Model
--Basic Connections.
Vo=Vref(1+R2/R1) + Iadj*R2
Feb 03, 2015 Ver. 07
IL1117C-XX
Typical Perfomance Characteristics
Feb 03, 2015 Ver. 07
IL1117C-XX
Typical Perfomance Characteristics (continue)
Figure 3.
Feb 03, 2015 Ver. 07
IL1117C-XX
Application Information
Output voltage adjustment
Like most regulators, the IL1117C regulates the output by comparing the output voltage to an internally generated reference voltage. On the adjustable version as shown in Fig.4, the VREF is available externally as
1.25V between VOUT and ADJ. The voltage ratio formed by R1 and R2 should be set to conduct 10mA (minumum output load).
The output voltage is given by the following equation:
Vo=Vref(1+R2/R1)+Iadj*R2
On fixed versions of IL1117C, the voltage divider is provided internal-
ly.
Figure 4. Basic Adjustable Regulator
Input Bypass Capacitor
An input capacitor is recommended. A 10μF tantalum on the input is a suitable input bypassing for almost all
applications.
Adjust Terminal Bypass Capacitor
The adjust terminal can be bypassed to ground with a bypass capacitor (CADJ) to improve ripple rejection.
This bypass capacitor prevents ripple from being amplified as the output voltage is increased. At any ripple
frequency, the impedance of the CADJ should be less than R1 to prevent the ripple from being amplified:
The R1 is the resistor between the output and the adjust pin. Its value is normally in the range of 100- 200Ω.
For example, with R1 = 124Ωand fRIPPLE = 120Hz, the CADJ should be 11μF.
Output Capacitor
IL1117C requires a capacitor from VOUT to GND to provide compensation feedback to the internal gain stage.
This is to ensure stability at the output terminal. Typically, a 10μF tantalum or 50μF aluminum electrolytic is
sufficient.
Note: The ESR is typically 1.0 Ω.
The output capacitor does not have a theoretical upper limit and increasing its value will increase stability.
COUT = 100μF or more is typical for high current regulator design.
Load Regulation
When the adjustable regulator is used (Fig.5), the best load regulation is accomplished when the top of the
resistor divider (R1) is connected directly to the output pin of the IL1117C. When so connected, RP is not
multiplied by the divider ratio. For Fixed output version, the top of R1 is internally connected to the output and
ground pins can be connected to low side of the load.
Feb 03, 2015 Ver. 07
IL1117C-XX
Figure 5. Best Load Regulation Using Adjustable Output Regulator
Thermal Protection
IL1117C has thermal protection which limits junction temperature to 150C. However, device functionality is
only guaranteed to a maximum junction temperature of +125C. The power dissipation and junction temperature for IL1117C in DPAK package are given by
Note: TJUNCTION must not exceed 125C
Current Limit Protection
IL1117C is protected against overload conditions. Current protection is triggered at typically 1.6A.
Thermal Consideration
The IL1117C series contain thermal limiting circuitry designed to protect itself from over-temperature conditions. Even for normal load conditions, maximum junction temperature ratings must not be exceeded. As
mention in thermal protection section, we need to consider all sources of thermal resistance between junction
and ambient. It includes junction-tocase, case-to-heat-sink interface, and heat sink thermal resistance itself.
Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below
the die. Proper mounting is required to ensure the best possible thermal flow from this area of the package to
the heat sink. The case of all devices in this series is electrically connected to the output. Therefore, if the
case of the device must be electrically isolated, a thermally conductive spacer is recommended.
Feb 03, 2015 Ver. 07
IL1117C-XX
Symbol
Dimension in Millimeters
Dimension in inches
Min
Max
Min
Max
A
1.520
1.800
0.060
0.071
A1
0.000
0.100
0.000
0.004
A2
1.600
1.700
0.063
0.067
b
0.680
0.780
0.027
0.031
c
0.230
0.280
0.009
0.011
D
6.400
6.500
0.252
0.256
D1
2.950
3.070
0.116
0.121
E
3.400
3.600
0.134
0.142
E1
6.800
7.200
0.268
0.283
e
2.300 (BSC)
0.091 (BSC)
e1
4.6 (BSC)
1.811 (BSC)
L
0.450
0.650
0.018
0.026
Θ
0ㅇ
10 ㅇ
0ㅇ
10 ㅇ
Feb 03, 2015 Ver. 07
IL1117C-XX
Feb 03, 2015 Ver. 07
IL1117C-XX
Feb 03, 2015 Ver. 07