FAN1540 Datasheet PDF - Fairchild Semiconductor
Part Number | FAN1540 | |
Description | 1A/1.3A/ LDO With Low Quiescent Current | |
Manufacturers | Fairchild Semiconductor | |
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FAN1539/FAN1540
1A/1.3A, LDO With Low Quiescent Current
Features
• Very Low Ground Current (IGND = 1mA)
• Excellent Line Regulation
• Excellent Load Regulation
• Very Low Transient Overshoot
• Stable with low ESR Output Capacitor (ESR = 0mΩ)
• Thermal Shutdown
• Current Limit
• Output Options: 3.3V and 1.8V
Applications
• Disk Drive Circuits
• Desktop Computers
• Laptop, Notebook Computers
• General purpose Three Terminal Regulator
Description
The FAN1539/FAN1540 series of high current LDO (1.0A
and 1.3A) has been developed for portable applications
where low quiescent current is an important requirement.
The device features excellent line and load transient response
which does not exceed 10% of nominal output value for full
operating temperature range even during power ON cycle
and short circuit removal. Internally trimmed, temperature
compensated bandgap reference guarantees 2.5% accuracy
for full range of input voltage, output current and tempera-
ture. Included on the chip are accurate current limit and ther-
mal shutdown protection. Device stability is achieved with
only two external low ESR ceramic capacitors.
The FAN1539/FAN1540 is available in thermally enhanced
3x3mm 6-lead MLP, 5x6mm 8-lead MLP package and
3-lead TO-252 packages. The 5x6mm MLP package version
features separate Kelvin sense pin for high precision applica-
tions.
Block Diagram
VIN
SRART-UP
CIRCUIT
BANDGAP
REFERENCE
ERROR
AMPLIFIER
THERMAL
SHUTDOWN
Notes:
1. No connection for FAN1540MMPX.
2. VSEN available for FAN1540MMPX.
CURRRENT
LIMIT
VOUT
X (Note1)
VSENSE
(Note2)
GND
REV. 1.0.8 3/22/04
|
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PRODUCT SPECIFICATION
FAN1539/FAN1540
Electrical Characteristics—FAN1539MPX, FAN1540MPX, FAN1540MMPX,
FAN1540DX (Continued)
Unless otherwise specified, VIN = 4.50V to 7V, Tj = 25°C, IMAX (FAN1539) = 1.0A, IMAX (FAN1540) = 1.3A. Boldface
limits apply over operating junction temperature range of 0°C ≤ TJ ≤ 125°C.
Parameter
Transient
Response
Short circuit
Removal
Response
(Note 9)
Symbol
-∆----V----O---U----T-
∆VIN
@IOUT
= short
TEST CONDITIONS
VIN IOUT
5V IOUT = short
to
IOUT = 10mA
TEST LIMITS
Min. Typ. Max. Units
5.0 10 %
(over-
shoot
or un-
der-
shoot
of VO)
Quiescent
Current
Quiescent
Current
Quiescent
Current
Thermal
Shutdown
Thermal
Hysteresis
IGND
IGND
IGND
TjSD
THYST
VIN ≤ 7V
VIN ≤ 7V
VIN = 5V
3.0V ≤ VIN ≤ 5.25V
3.0 ≤ VIN ≤ 5.25V
IOUT = 0mA
2mA ≤ IOUT ≤ IMAX
0mA ≤ IOUT ≤ 50mA
1.0 2.0 mA
1.0 2.0 mA
1.0 2.0 mA
160 °C
15 °C
Notes:
6. Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 1% below the nominal
value measured at VIN = 5V.
7. Measured within 10Hz to 10kHz bandwidth.
8. Measured at DC, specified at 120 Hz.
9. CIN = 22µF, COUT = 10µF. Both capacitors are low ESR X7R type.
Test Circuit
VIN
IN DUT OUT
VOUT
CIN 22µF
GND
10µF
COUT
Notes: 1. Use low ESR capacitors.
2. CIN should be placed as close to VIN as possible.
REV. 1.0.8 3/22/04
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for FAN1540 electronic component. |
Information | Total 15 Pages | |
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Download | [ FAN1540.PDF Datasheet ] |
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