IKSEMICON ILE4266-2

TECHNICAL DATA
ILE 4266-2
5 V Low-Drop Voltage Regulator
Features
Output voltage tolerance ≤ ± 3 %
150 mA current capability
Very low current consumption
Low-drop voltage
Overtemperature protection
Reverse polarity proof
Wide temperature range
Suitable for use in automotive electronics
Inhibit
Type
Package
ILE 4266-2 G
P-SOT223-4-2
ILE 4266-2
P-SOT223-4-2
TA = -40 °...125°C
Functional Description
The ILE 4266-2 is a monolithic integrated low-drop fixed voltage regulator which can
supply loads up to 150 mA. It can be switched on and off by the INH pin. It is functional
compatible to the ILE 4266, but with a reduced quiescent current of < 1 µA in OFF
mode and 35 µA in ON mode. The ILE 4266-2 is especially designed for all applications
that require very low quiescent current in ON and OFF mode. The device is available in
the small surface mounted P-SOT223-4-2 package. In the P-SOT223-4-2
housing it is pin compatible to the ILE 4266G. It is designed to supply
microprocessor systems under the severe condition of automotive applications and
therefore it is equipped with additional protection against over load, short circuit and
overtemperature. Of course the ILE 4266-2 can be used in other applications, where a
stabilized voltage and the inhibit feature is required.
And input voltage VI in the range of 6 V < VI < 45 V is regulated to VQ = 5 V with an
accuracy of ± 3%.
The device operates in the temperature range of Tj = – 40 to 125 °C. A High level at the
INH pin switches the regulator on.
ILE 4266-2
Pin Configuration (top view)
P-SOT223-4-2
GND
4
1
2
3
Ι
INH
Q
Pin Definitions and Functions
Pin
Symbol
Function
1
I
Input voltage; block to ground directly at the IC with a ceramic
capacitor.
2
INH
Inhibit input; high level turns IC on.
3
Q
Output voltage; block to ground with a capacitor.
4
GND
Ground
ILE 4266-2
Block Diagram
Saturation
Control and
Protection
Circuit
Temperature
Sensor
Ι
Q
Control
Amplifier
Adjustment
Buffer
Bandgap
Reference
INH
GND
GND
ILE 4266-2
Absolute Maximum Ratings
Tj = – 40 to 125 °C
Parameter
Sym bol Limit Values
min.
max.
Unit Notes
Input I
Voltage
VI
– 42
45
V
–
Current
II
–
–
–
internally limited
VINH
– 42
45
V
–
Voltage
VQ
–1
32
V
–
Current
IQ
–
–
–
internally limited
Inhibit INH
Voltage
Output Q
Output Voltage Sense S
Voltage
VS
–1
32
V
–
Current
IS
–
–
–
internally limited
IGND
50
–
mA
–
Junction temperature
Tj
–
150
°C
–
Storage temperature
TS
– 50
150
°C
–
Input voltage
Vi
5.5
45
V
–
Junction temperature
Tj
– 40
150
°C
–
GND
Current
Temperature
Operating Range
ILE 4266-2
Absolute Maximum Ratings
Tj = – 40 to 150 °C
Parameter
Symbol
Limit Values
min.
max.
Unit Notes
Thermal Resistance
Junction ambient
Rthj-a
–
85
K/W
P-SOT223-4-21)
Junction ambient
Rthj-a
–
115
K/W
P-TSOP-8-11)
Junction case
Rthj-pin4
–
20
K/W
P-SOT223-4-2
Junction case
Rthj-pin5-8
–
29
K/W
P-TSOP-8-1
Input voltage
Vi
5.5
45
V
–
Junction temperature
Tj
– 40
150
°C
–
Operating Range
1)
Worst case, regarding peak temperature; zero airflow; mounted an a PCB 80 × 80 × 1.5 mm3, heat sink area
300 mm2.
ILE 4266-2
Characteristics
VI = 13.5 V; – 40 °C ≤ Tj ≤ 125 °C
Parameter
Symbol
Limit Values
Unit Test Condition
min. typ. max.
Output voltage
VQ
4.9
5
5.1
V
5 mA ≤ IQ ≤ 100 mA
6 V ≤ Vi ≤ 28 V
Output-current limitation
IQ
150
200
500
mA
–
Current consumption
Iq = Ii – IQ
Iq
–
0
1
µA
VINH = 0 V; Tj ≤ 100 °C
Current consumption
Iq = Ii – IQ
Iq
–
35
–
µA
IQ = 1 mA
Current consumption
Iq = Ii – IQ
Iq
Drop voltage
VDr
–
0.25 0.5
V
IQ = 100 mA1)
Load regulation
∆VQ
–
10
30
mV
IQ = 1 to 100 mA
Vi = 6 V
Line regulation
∆VQ
–
10
40
mV
VI = 6 V to 28 V
IQ = 1 mA
Supply-voltage rejection
SVR
–
68
–
dB
fr = 100 Hz, Vr = 0.5 VPP
Output Capacitor
CQ
10
–
–
µF
Low ESR tantalum or
ceramic capacitor
recommended
Output Series Resistance
RQ +ESR 1.5
–
5.5
Ω
CQ= 10 µF
RQ +ESR 1.0
–
5.5
Ω
CQ= 22 µF
Inhibit ON
–
2
8
mA
IQ = 50 mA
Inhibit ON
ILE 4266-2
Characteristics
VI = 13.5 V; – 40 °C ≤ Tj ≤ 125 °C
Parameter
Symbol
Limit Values
Unit Test Condition
min. typ. max.
Inhibit
Inhibit on voltage
VINH, on
–
–
3.5
V
–
Inhibit off voltage
VINH, off
0.8
–
–
V
–
Inhibit current
IINH
–
4
1)
Drop voltage = Vi – VQ (measured when the output voltage
obtained at Vi = 13.5 V).
8
µA
VINH = 5 V
VQ has dropped 100 mV from the nominal value
ILE 4266-2
Measuring Circuit
Input
5.5 V to 45 V
Ι
Ci
Q
ILE 4266-2
INH
e.g. Kl. 15
GND
Output
R Q = 1.5 Ω
10 µF
Circuit Description and Application Information
In the ILE 4266-2 the output voltage is divided and compared to an internal reference of
2.5 V typical. The regulation loop controls the output to achieve an output voltage of 5 V
with an accuracy of ± 2% at an input voltage range of 5.5 V < VI < 45 V.
For stability of the control loop the ILE 4266-2 output requires an output capacitor C Q of
at least 10 µF and an additional output resistor RQ . The resistor should be 1.5 Ω when a
10 µF capacitor is used and 1.0 Ω for CQ ≥ 22µF. The sum of RQ and the ESR of the
capacitor must be kept below 5.5 Ω. In order to achieve this the use of low-ESR tantalum
or ceramic capacitors is recommended.
The ILE 4266-2 can supply up to 150 mA. However for protection reasons at high input
voltage above 25 V, the maximum output current is reduced (SOA protection).
At the input of the regulator an input capacitor is necessary for compensating line
influences. A resistor of approx. 1 Ω in series with CI, can damp any oscillation occuring
due the input inductivity and the input capacitor.
The ILE 4266-2 includes the Inhibit function. For a voltage above 3.5 V at the INH pin
the regulator is switched on.
ILE 4266-2
Package Dimension
P-SOT223-4-2