ILC7080AIM5 Datasheet PDF - Fairchild Semiconductor
| Part Number | ILC7080AIM5 | |
| Description | 50/100mA SOT-23 CMOS RF LDO Regulators | |
| Manufacturers | Fairchild Semiconductor | |
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ILC7080/81
50/100mA SOT-23 CMOS RF LDO™ Regulators
Features
• Ultra low 1mV dropout per 1mA load
• 1% output voltage accuracy
• Uses low ESR ceramic output capacitor to minimize noise
and output ripple
• Only 100µA ground current at 100mA load
• Ripple rejection up to 85dB at 1kHz, 60dB at 1MHz
• Less than 80µVRMS noise at BW = 100Hz to 100kHz
• Excellent line and load transient response
• Over current / over temperature protection
• Guaranteed up to 80/150mA output current
• Industry standard five lead SOT-23 package
• Fixed 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0, 3.1V, 3.3V,
3.6V, 4.7V, 5.0V and adjustable output (ILC7081 only)
voltage options
• Metal mask option available for custom voltages between
2.5 to 5.1V
Applications
• Cellular phones
• Wireless communicators
• PDAs / palmtops / organizers
• Battery powered portable electronics
Description
The ILC7080/81 are 50 or 100mA low dropout (LDO)
voltage regulators designed to provide a high performance
solution to low power systems.
The devices offer a typical combination of low dropout and
low quiescent current expected of CMOS parts, while
uniquely providing the low noise and high ripple rejection
characteristics usually only associated with bipolar LDO
regulators.
The devices have been optimized to meet the needs of
modern wireless communications design; Low noise, low
dropout, small size, high peak current, high noise immunity.
The ILC7080/81 are designed to make use of low cost
ceramic capacitors while outperforming other devices that
require tantalum capacitors.
Typical Applications
VOUT
COUT
VIN
5 SOT-23-5 4
ILC7080
ILC7081
123
CNOISE
ON
OFF
REV. 1.0.7 4/3/03
|
| |
 
VIN
CNOISE
BANDGAP
REFERENCE
VREF
INTERNAL VDD
ERROR
AMPLIFIER
TRANS-
CONDUCTANCE
AMPLIFIER
GND
FEEDBACK
VOUT
ILC7080/81
ON/OFF
Figure 2. ILC7080/81 RF LDO regulator block diagram
Shutdown (ON/OFF) Operation
The ILC7080/81 output can be turned off by applying 0.4V
or less to the device’s ON/OFF pin (pin 3). In shutdown
mode, the ILC7080/81 draws less than 1µA quiescent cur-
rent. The output of the ILC7081 is enabled by applying 2V to
13V at the ON/OFF pin. In applications where the ILC7080/
81 output will always remain enabled, the ON/OFF pin may
be connected to VIN (pin 1). The ILC7080/81’s shutdown
circuitry includes hysteresis, as such the device will operate
properly even if a slow moving signal is applied to the ON/
OFF pin.
Adjustable Output Voltage
Figure 3 shows how an adjustable output voltage can be
easily achieved using ILC7081-ADJ. The output voltage,
VOUT is given by the following equation:
VOUT = 1.24V x (R1/R2 + 1)
VOUT
R1 R2
5 SOT23-5 4 VADJ
Short Circuit Protection
The ILC7080/81 output can withstand momentary short
circuit to ground. Moreover, the regulator can deliver very
high output peak current due to its 1A instantaneous short
circuit current capability.
Thermal Protection
The ILC7080/81 also includes a thermal protection circuit
which shuts down the regulator when die temperature
exceeds 150˚C due to overheating. In thermal shutdown,
once the die temperature cools to below 140˚C, the regulator
is enabled. If the die temperature is excessive due to high
package power dissipation, the regulator’s thermal circuit
will continue to pulse the regulator on and off. This is called
thermal cycling.
Excessively high die temperature may occur due to high
differential voltage across the regulator or high load current
or high ambient temperature or a combination of all three.
Thermal protection protects the regulator from such fault
conditions and is a necessary requirement in today’s designs.
In normal operation, the die temperature should be limited to
under 150˚C.
COUT
VIN
CIN
ILC7081-ADJ
1 23
ON
OFF
Figure 3. Application circuit for adjustable output voltage
For best results, a resistor value of 470kΩ or less may be
used for R2. The output voltage can be programmed from
2.5V to 12V.
Note: An external capacitor should not be connected to the
adjustable feedback pin (pin 4). Connecting an external
capacitor to pin 4 may cause regulator instability and lead to
oscillations.
REV. 1.0.7 4/3/03
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ILC7080AIM5 electronic component. |
| Information | Total 16 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ILC7080AIM5.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| ILC7080AIM5 | The function is 50/100mA SOT-23 CMOS RF LDO Regulators. Fairchild Semiconductor | |
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