DataSheet.jp

FAN1582M-2.5 の電気的特性と機能

FAN1582M-2.5のメーカーはFairchild Semiconductorです、この部品の機能は「3A Adjustable/Fixed Ultra Low Dropout Linear Regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 FAN1582M-2.5
部品説明 3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
メーカ Fairchild Semiconductor
ロゴ Fairchild Semiconductor ロゴ 




このページの下部にプレビューとFAN1582M-2.5ダウンロード(pdfファイル)リンクがあります。

Total 12 pages

No Preview Available !

FAN1582M-2.5 Datasheet, FAN1582M-2.5 PDF,ピン配置, 機能
www.fairchildsemi.com
FAN1582
3A Adjustable/Fixed Ultra Low Dropout
Linear Regulator
Features
• Ultra Low dropout voltage, 0.4V typical at 3A
• Remote sense operation
• Fast transient response
• Load regulation: 0.05% typical
• 0.5% initial accuracy
• On-chip thermal limiting
• 5-Pin SPAK, TO-252 DPAK, and TO-263 packages
Applications
• Pentium® Processors
• PowerPC, AMD K5 and K6 processors
• Pentium support of GTL+ bus supply
• Low voltage logic supply
• Embedded Processor supplies
• Split plane regulator
• New 2.5V and 1.8V Logic Families
Description
The FAN1582, FAN1582-1.5, and FAN1582-2.5 are ultra-low
dropout regulators with 3A output current capability. These
devices have been optimized for low voltage applications
including VTT bus termination, where transient response and
minimum input voltage are critical. The FAN1582 is ideal
for low voltage microprocessor applications requiring a reg-
ulated output from 1.3V to 5.7V with a power input supply
of 1.75V to 6.5V. The FAN1582-1.5 offers fixed 1.5V with
3A current capabilities for GTL+ bus VTT termination. The
FAN1582-2.5 offers fixed 2.5V with 3A current capability
for logic IC operation and processors while minimizing the
overall power dissipation.
Current limit ensures controlled short-circuit current. On-chip
thermal limiting provides protection against any combination
of overload and ambient temperature that would create exces-
sive junction temperatures.
The FAN1582 series regulators are available in the 5-Pin
SPAK, TO-252 DPAK, and TO-263 power packages.
Typical Applications
VIN = 3.3V
10µF
+
VCNTL = 5V
VIN VSENSE
FAN1582
VCNTL
VOUT
Adj
VIN = 3.3V
10µF
+
124
2.1V at 3A
+
22µF
86.6
VCNTL = 5V
1µF
+
VIN = 5.75V
10µF
+
VCNTL = 12V
VIN VSENSE
FAN1582–2.5
VCNTL
VOUT
GND
VIN VSENSE
FAN1582
VCNTL
VOUT
Adj
2.5V at 3A
+
22µF
124
5V at 3A
+
22µF
374
Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
REV. 1.1.2 2/26/03

1 Page





FAN1582M-2.5 pdf, ピン配列
PRODUCT SPECIFICATION
FAN1582
Absolute Maximum Ratings
Parameter
VIN
VCNTL
Operating Junction Temperature Range
Lead Temperature (Soldering, 10 sec.)
Storage Temperature Range
Min.
0
-65
Max.
7
13.2
125
300
150
Unit
V
V
°C
°C
°C
Electrical Characteristics
TJ=25°C, VOUT = VS, VADJ = 0V unless otherwise specified.
The • denotes specifications which apply over the specified operating temperature range.
Parameter
Reference Voltage3
Reference Voltage3
Adjustable Output Voltage
Output Voltage4
Output Voltage5
Line Regulation1,2
Load Regulation1,2
Dropout Voltage Minimum
(VCNTL–VOUT)
Dropout Voltage Minimum
(VIN–VOUT)
Dropout Voltage Minimum VIN
Current Limit
Control Pin Current
Adjust Pin Current3
Minimum Load Current
Ripple Rejection
Thermal Resistance, Junction to
Case
Thermal Regulation
Thermal Shutdown
Conditions
Min. Typ. Max. Units
VIN = 2.0V, VCNTL = 2.75V,
IOUT = 10mA
1.243 1.250 1.257
2.05V VIN 5.5V,
2.7V VCNTL 12V,
10mA IOUT 3A
• 1.237 1.250 1.263
3V VIN 7V (function of Vout),
10mA IOUT 3A
• Vref 1.5 5.7
3V VIN 7V, 10mA IOUT 3A
• 1.47 1.5 1.53
5.1V VIN 7V, 10mA IOUT 3A
• 2.474 2.5 2.526
1.75V VIN 5.5V, 2.5V VCNTL 12V, •
IOUT = 10mA
13
VIN = 2.1V, VCNTL = 2.75V,
10mA IOUT 3A
• 15
VIN = 2.05V, VREF = 1%, IOUT = 3A •
1.05 1.18
V
V
V
V
V
mV
mV
V
VCNTL = 2.75V, VREF = 1%,
IOUT = 3A
0.4 0.5 V
VCNTL = 2.75V, VREF = 1%, • 0.5 0.6 V
IOUT = 3A
VIN = 2.05V, VCNTL = 2.75V
• 3.1
A
VIN = 2.05V, VCNTL = 2.75V, • 2 6 mA
IOUT = 10mA
VIN = 2.05V, VCNTL = 2.75V
• 50 120 µA
VIN = 3.3V, VCNTL = 5V
• 5.0 10 mA
VIN = 3.75V, VCNTL = 3.75V, f = 120Hz,
COUT = 22µF Tantalum, IOUT = 1.5A
60 80
dB
TO-263/TO-252
3 °C/W
SPAK
2
TA = 25°C, 30ms pulse
0.002 0.02 %/W
150 °C
Notes:
1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are
measured at a constant junction temperature by low duty cycle pulse testing.
2. Line and load regulation are guaranteed up to the maximum power dissipation (18W). Power dissipation is determined by
input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/
output voltage range.
3. FAN1582 only.
4. FAN1582-1.5 only.
5. FAN1582-2.5 only.
REV. 1.1.2 2/26/03
3


3Pages


FAN1582M-2.5 電子部品, 半導体
FAN1582
PRODUCT SPECIFICATION
pin of the FAN1582 for low ripple and fast transient response.
When these bypassing capacitors are not used at the adjust pin,
smaller values of output capacitors provide equally good results.
Protection Diodes
In normal operation, the FAN1582 series does not require any
protection diodes. For the FAN1582, internal resistors limit
internal current paths on the adjust pin. Therefore, even with
bypass capacitors on the adjust pin, no protection diode is
needed to ensure device safety under short-circuit conditions.
A protection diode between the input and output pins is usu-
ally not needed. An internal diode between the input and the
output pins on the FAN1582 series can handle microsecond
surge currents of 50A to 100A. Even with large value output
capacitors it is difficult to obtain those values of surge cur-
rents in normal operation. Only with large values of output
capacitance, such as 1000µF to 5000µF, and with the input
pin instantaneously shorted to ground can damage occur. A
crowbar circuit at the input can generate those levels of current;
a diode from output to input is then recommended, as shown
in Figure 1. Usually, normal power supply cycling or system
“hot plugging and unplugging” will not generate current
large enough to do any damage.
The adjust pin can be driven on a transient basis ±7V with
respect to the output, without any device degradation. As with
any IC regulator, exceeding the maximum input-to-output
voltage differential causes the internal transistors to break
down and none of the protection circuitry is then functional.
D1
1N4002
(OPTIONAL)
Ripple Rejection
In applications that require improved ripple rejection, a bypass
capacitor from the adjust pin of the FAN1582 to ground
reduces the output ripple by the ratio of VOUT/1.25V. The
impedance of the adjust pin capacitor at the ripple frequency
should be less than the value of R1 (typically in the range of
100to 120) in the feedback divider network in Figure 1.
Therefore, the value of the required adjust pin capacitor is a
function of the input ripple frequency. For example, if R1 equals
100and the ripple frequency equals 120Hz, the adjust pin
capacitor should be 22µF. At 10kHz, only 0.22µF is needed.
Output Voltage
The FAN1582 regulator develops a 1.25V reference voltage
between the output pin and the adjust pin (see Figure 2).
Placing a resistor R1 between these two terminals causes a
constant current to flow through R1 and down through R2 to
set the overall output voltage. Normally, this current is the
specified minimum load current of 10mA.
The current out of the adjust pin adds to the current from R1
and is typically 50µA. Its output voltage contribution is small
and only needs consideration when a very precise output
voltage setting is required.
Vcntl
VIN
+
C1
10µF
Vcntl Vsense
FAN1582
Vin Adj Vout
VREF
IADJ
50µA
+
R1
VOUT
C2
22µF
R2
VOUT = VREF (1+R2/R1) + IADJ (R2)
VOUT
VIN
+
C1
10µF
Vcntl Vsense
FAN1582
Vin Adj Vout
+
CADJ
+
R1
VOUT
C2
22µF
R2
D1
1N4002
(OPTIONAL)
VCNTL
VIN +
Vcntl Vsense
FAN15821.5, 2.5 +
C1 Vin Gnd Vout
10µF
C2
22µF
VOUT
Figure 1. Optional Protection Diode
Figure 2. Basic Regulator Circuit
Load Regulation
The FAN1582 family provides true remote sensing, eliminat-
ing output voltage errors due to trace resistance. To utilize
remote sensing, connect the VSENSE pin directly to the
load, rather than at the VOUT pin. If the load is more than 1"
away from the FAN1582, it may be necessary to increase the
load capacitance to ensure stability.
Thermal Considerations
The FAN1582 series protect themselves under overload con-
ditions with internal power and thermal limiting circuitry.
However, for normal continuous load conditions, do not exceed
maximum junction temperature ratings. It is important to
consider all sources of thermal resistance from junction-to-
ambient. These sources include the junction-to-case resistance,
the case-to-heat sink interface resistance, and the heat sink
resistance. Thermal resistance specifications have been
developed to more accurately reflect device temperature and
ensure safe operating temperatures. The electrical character-
6 REV. 1.1.2 2/26/03

6 Page



ページ 合計 : 12 ページ
 
PDF
ダウンロード
[ FAN1582M-2.5 データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
FAN1582M-2.5

3A Adjustable/Fixed Ultra Low Dropout Linear Regulator

Fairchild Semiconductor
Fairchild Semiconductor


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap