TECHNICAL DATA
1.0A Low Dropout Positive Voltage Regulator
The IL1117 is a ries of low dropout voltage regu-lators which can provide up to 1A of output current. The IL1117 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 avail-able in adjustable version. On chip precision trimming adjusts the reference/ output voltage to within
ed
(for IL1117-1.2V - 0 to +150°C)
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
Absolute Maximum Ratings
Symbol Description
Max Units VIN Input Voltage
15
V IOUT DC Output Current
PD/(VIN-VO)mA TJ Operating Junction Temperature Range -40 to 125°C ΘJA Thermal Resistance (SOT-223)150°C/W ΘJA Thermal Resistance (TO-252)80°C/W ΘJA Thermal Resistance (TO-220)
60°C/W PD Maximum Power Dissipation (SOT-223)mW PD Maximum Power Dissipation (TO-252)mW PD
Maximum Power Dissipation (SOT-220)
Internally Limited
mW
IL1117-xx
Pin#2 connected with heat sink
Electrical Characteristics
Vin = 5V, Co = 10uF, Ta = 25°C, Tj = -40°C to +125°C ( for IL1117-1.2 Tj = 0 to +150°C) unless otherwi specified
PARAMETER CONDITIONS MIN TYP MAX UNIT OUTPUT VOLTAGE
IL1117-1.2
IL1117-1.25 (Adjustable)
IL1117-1.5
IL1117-1.8
IL1117-2.5
IL1117-2.85
IL1117-3.3
IL1117-5.0Io = 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 15.0V
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
LINE REGULATION
IL1117-1.2
IL1117-1.25 (Adjustable)
IL1117-1.5
IL1117-1.8
IL1117-2.5
IL1117-2.85
挽联横批IL1117-3.3
IL1117-5.0Io =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 15.0V
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
马鞍山工业学校
mV
%
mV
mV
皮鞋能用水洗吗mV
mV
mV
mV
LOAD REGULATION
IL1117-1.2
IL1117-1.25 (Adjustable)
IL1117-1.5
IL1117-1.8
IL1117-2.5
IL1117-2.85
IL1117-3.3
IL1117-5.0Io = 10mA to 1.0A, Vin = 3.2V
Io = 10mA to 1.0A, Vin = 3.3V
Io = 10mA to 1.0A, Vin = 3.5V
Io = 10mA to 1.0A, Vin = 3.8V
Io = 10mA to 1.0A, Vin = 4.5V
Io = 10mA to 1.0A, Vin = 4.85V
Io = 10mA to 1.0A, Vin = 5.3V
Io = 10mA to 1.0A, Vin = 7.0V
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
DROPOUT VOLTAGE(2)
All Models Io =1A 1.20 1.30
V
Io Tj =-40°C to +125°C) 1.20 1.55 CURRENT LIMIT Vin - Vo = 5V1000mA MINIMUM LOAD CURRENT
Adjustable Models Vin= 13.75V5mA QUIESCENT CURRENT Vin - Vo = 1.5V 5.210mA Adjust Pin Current Io = 10mA, Vin - Vo = 1.4 to 10V50120uA vs Load Current,IL1117Io= 10mA to 1A,Vin Vo= 1.4 to 10V0.55uA TEMPERATURE DRIFT Tj = -40°C to +125°C0.5% RMS Output Noi Bandwidth of 10Hz to 10kHz at 25°C0.003%Vo
Ripple Rejection Ratio 120Hz input Ripple(Cadj for ADJ) =
25uF
Vin -Vo= 5V, Io = 1.0A
Tj = -40°C to +125°C
6072dB
NOTES: (1) IL1117-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% decrea in
output voltage.
Block Diagram
Application Information
FIGURE 1. Fixed-Voltage Model FIGURE 2. Adjustable-Voltage Model
—Basic Connections. --Basic Connections.
Vo=Vref(1+R2/R1)+Iadj*R2
IL1117
IL1117(Adj)
Typical Perfomance Characteristics
Typical Perfomance Characteristics (continue)
熊儿河
Figure 3.
世界之窗官网
Application Information
Output voltage adjustment
Like most regulators, the IL1117 regulates the output by comparing the output voltage to an internally gen-erated reference voltage. On the adjustable version as shown in Fig.4, the V REF is available externally as 1.25V between V OUT and ADJ. The voltage ratio formed by R1 and R2 should be t to conduct 10mA (mi-numum output load).
The output voltage is given by the following equation:
给予的近义词On fixed versions of IL1117, the voltage divider is provided internally.
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 bypasd to ground with a bypass capacitor (C ADJ) to improve ripple rejection. This bypass capacitor prevents ripple from being amplified as the output voltage is incread. At any ripple frequency, the impedance of the C ADJ 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 = 124Ωand f RIPPLE= 120Hz, the C ADJ should be> 11μF.
Output Capacitor
IL1117 requires a capacitor from V OUT 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.我也有一个梦想
Note: It is important that the ESR for this capacitor does not exceed 0.5 Ω.
The output capacitor does not have a theoretical upper limit and increasing its value will increa stability.
C OUT= 100μF or more is typical for high current regulator design.
Load Regulation
2021年考研国家线When the adjustable regulator is ud (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 IL1117. When so connected, R P 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.
