參數(shù)資料
型號(hào): FAN2505S25
元件分類: 線性穩(wěn)壓
英文描述: THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS
中文描述: 三端固定電壓調(diào)節(jié)器
文件頁(yè)數(shù): 3/10頁(yè)
文件大?。?/td> 547K
代理商: FAN2505S25
PRODUCT SPECIFICATION
FAN2502/FAN2503
2
REV. 1.1.6 2/11/02
Pin Assignments
Pin Descriptions
Pin No.
FAN2502
FAN2502-XX
FAN2503-XX
1.
VIN
2.
GND
3.
EN
4.
ADJ
BYP
ERR
5.
VOUT
Pin Name
Pin No.
Type
Pin Function Description
ADJ
4
Input
FAN2502 Adjust. Ratio of potential divider from VOUT to ADJ
determines output voltage.
BYP
4
Passive
FAN2502-XX Bypass. Connect 470 pF capacitor for noise reduction.
ERR
4
Open drain
FAN2503-XX Error. Error flag output.
0: Output voltage < 95% of nominal.
1: Output voltage > 95% of nominal.
EN
3
Digital Input
Enable.
0: Shutdown VOUT.
1: Enable VOUT.
VIN
1
Power in
Voltage Input. Supply voltage input.
VOUT
5
Power out
Voltage Output. Regulated output voltage.
GND
2
Power
Ground.
15
2
3
VIN
GND
EN
4
VOUT
ADJ/BYP/ERR
Functional Description
Designed utilizing CMOS process technology, the
FAN2502/03 family of products are carefully optimized for
use in compact battery-powered devices, offering a unique
combination of low power consumption, extremely low
dropout voltages, high tolerance for a variety of output
capacitors, and the ability to disable the output to less than
1A under user control. In the circuit, a difference amplier
controls the current through a series-pass P-Channel
MOSFET, comparing the load voltage at the output with an
onboard low-drift bandgap reference. The series resistance
of the pass P-Channel MOSFET is approximately 1
,
resulting in an unusually low dropout voltage under load
when compared to older bipolar pass-transistor designs.
Protection circuitry is provided onboard for overload condi-
tions. In conditions where the device reaches temperatures
exceeding the specied maximums, an onboard circuit shuts
down the output, where it remains suspended until it has
cooled before re-enabling. The user is also free to shut down
the device using the Enable control pin at any time.
Careful design of the output regulator amplier assures loop
stability over a wide range of ESR values in the external
output capacitor. A wide range of values and types can be
accomodated, allowing the user to select a capacitor meeting
his space, cost, and performance requirements, and enjoy
reliable operation over temperature, load, and tolerance
variations.
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