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PDF ( 数据手册 , 数据表 ) FAN2518

零件编号 FAN2518
描述 50 mA CMOS LDO Regulators with Fast Start Enable
制造商 Fairchild Semiconductor
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FAN2518 数据手册, 描述, 功能
www.fairchildsemi.com
FAN2518, FAN2519
50 mA CMOS LDO Regulators with Fast Start Enable
Features
• Ultra Low Power Consumption
• Enable optimized for CDMA time phases
• 50 mV dropout voltage at 50 mA
• 25 µA ground current at 50 mA
• Enable/Shutdown Control
• SOT23-5 package
• Thermal limiting
• 300 mA peak current
wide variety of external capacitors, and the compact SOT23-5
surface-mount package. In addition, the FAN2518/19 family
offer the fast power-cycle time required in CDMA handset
applications. These products offer significant improvements
over older BiCMOS designs and are pin-compatible with
many popular devices. The output is thermally protected
against overload.
The FAN2518 and FAN2519 devices are distinguished by
the assignment of pin 4:
Applications
• Cellular Phones and accessories
• PDAs
• Portable cameras and video recorders
• Laptop, notebook and palmtop computers
Description
The FAN2518/19 family of micropower low-dropout voltage
regulators utilize CMOS technology to offer a new level of
cost-effective performance in GSM, TDMA, and CDMA
cellular handsets, Laptop and Notebook portable computers,
and other portable devices. Features include extremely low
power consumption and low shutdown current, low dropout
voltage, exceptional loop stability able to accommodate a
Block Diagrams
VIN
Bandgap
EN
Error
Amplifier
p
VOUT
ADJ
FAN2518: pin 4 – ADJ, allowing the user to adjust the
output voltage over a wide range using an external voltage
divider.
FAN2518-XX: pin 4 – BYP, to which a bypass capacitor
may be connected for optimal noise performance. Output
voltage is fixed, indicated by the suffix XX.
FAN2519-XX: pin 4 – ERR, a flag which indicates that the
output voltage has dropped below the specified minimum
due to a fault condition.
The standard fixed output voltages available are 2.5V, 2.6V,
2.7V, 2.8V, 2.85V, 3.0V, and 3.3V. Custom output voltage are
also available: please contact your local Fairchild Sales
Office for information.
VIN
Bandgap
EN
Error
Amplifier
p
BYP
VOUT
FAN2518
Thermal
Sense
GND
VIN
Bandgap
FAN2518-XX
EN
Error
Amplifier
p
Thermal
Sense
ERR
VOUT
GND
FAN2519-XX
Thermal
Sense
GND
REV. 1.0.6 2/14/03







FAN2518 pdf, 数据表
PRODUCT SPECIFICATION
Typical Performance Characteristics (continued)
Ground Pin Current
75
VIN = 4V
VOUT = 3V
50 IL = 100µA
Ground Pin Current
75
VIN = 4V
VOUT = 3V
50 IL = 50mA
25 25
0
-40 0
40 80
Temperature (°C)
125
0
-40 0 40 80 125
Temperature (°C)
Dropout Characteristics
3.5
3.0
VOUT = 3V
2.5
ROUT = 30K
2.0
1.5
ROUT = 20
1.0
0.5
0.0
0.0
1.0 2.0 3.0 4.0
Input Voltage (V)
5.0
Dropout Voltage
8
6
4
2 IL = 100µA
0
-40 0 40 80 125
Temperature (°C)
FAN2518/FAN2519
50.00
Dropout Voltage
40.00
30.00
20.00
10.00
0.00
0.1
10 20 30 40
Output Current (mA)
50
Dropout Voltage
100
75
50
25 IL = 50mA
0
-40 0 40 80 125
Temperature (°C)
Functional Characteristics
Enable Pin Delay
Enable
Output Voltage
vs. Temperature
3.05
3
2.95
2.9
2.85
-40
VIN = 4V
Typical 3V device
IL = 100µA
0 40 80
Temperature (°C)
125
Shutdown Delay
VOUT
Disable
VOUT
Time (20µs/div)
8
Time (20µs/div)
REV. 1.0.6 2/14/03














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