|
|
FAN1538DAXのメーカーはFairchild Semiconductorです、この部品の機能は「Dual Channel 1A Low Dropout Linear Regulator with UVLO and Soft-start」です。 |
部品番号 | FAN1538DAX |
| |
部品説明 | Dual Channel 1A Low Dropout Linear Regulator with UVLO and Soft-start | ||
メーカ | Fairchild Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとFAN1538DAXダウンロード(pdfファイル)リンクがあります。 Total 6 pages
www.fairchildsemi.com
FAN1538
Dual Channel 1A Low Dropout
Linear Regulator with UVLO and Soft-start
Features
• Two independent outputs
• Load regulation: 0.05% typical
• Under-voltage lockout and softstart
• Over Temperature protection
• T0-252 DPAK, 5-lead SPAK packages
• Fixed 3.3V and adjustable or fixed 2.5V output
Applications
• Hard Disk Drives, CD-Roms
• Set-top Boxes
• ADSL line cards
• Motherboards with multiple supplies
General Description
The FAN1538 provides two output voltages: a fixed 3.3V
ouput and either a fixed 2.5V or adjustable output with 1A
output current capability. Refer to Ordering Information for
details.
Current limit protects against short circuit currents and on
chip over temperature circuitry limits the maximum die tem-
perature.
Under voltage lockout and softstart circuitry protects against
unregulated output voltages when the input voltage is below
specification.
Block Diagram
VIN = 5V
22µF
+
FAN1538A
V1
VIN
V2
NC GND
3.3V at 1.0A
+
22µF
2.5V at 1.0A
+
22µF
VIN = 5V
22 µF
FAN1538B
V1
GND
V2
FB
R1
250
R2
1250
22µF
3.3V at 1.0A
1.5V at 1.0A
22µF
V2 = VREF (1 + R1/R2)
REV. 1.0.2 12/17/03
1 Page PRODUCT SPECIFICATION
FAN1538
Electrical Specifications
(Operating Conditions: VIN = 5V, TJ=25°C unless otherwise specified)
The • denotes specifications which apply over the full operating temperature range.
Parameter
V1 Output Voltage
V2 Output Voltage (FAN1538A)
V2 Minimum Output Voltage
(FAN1538B)
Conditions
10mA ≤ Iout ≤ 1A
4.50V ≤ VIN ≤ 7V
10mA ≤ Iout ≤ 1A
4.50V ≤ VIN ≤ 7V
10mA ≤ Iout ≤ 1A
4.50V ≤ VIN ≤ 7V
Min.
3.234
• 3.200
2.450
• 2.420
• 1.400
Reference Voltage (FAN1538B)
(FB)
10mA<Iout<1A
4.50V ≤ VIN ≤ 7V
1.225
• 1.210
FB Pin Bias Current
Line Regulation
(Both Outputs)
4.50V ≤ VIN ≤ 7V
Iout = 10mA
•
•
Load Regulation
(Both Outputs)
VIN=5.0V
10mA ≤ Iout ≤ 1A
•
Current Limit
(Both Outputs)
Minimum Load Current
(Both Outputs)
VIN = 5V
4.50V ≤ VIN ≤ 7V
1.1
• 10
Quiescent Current
VIN = 5V
•
Ripple Rejection
(Both Outputs)
F = 60Hz, Cout = 22µF
VIN = 5V, Iout =100mA
60
Under-Voltage Lockout (See Diagram1)
VIN Rising threshold
• 3.4
VIN Falling threshold
• 3.0
V1 & V2 delay start time
VIN > UVLO Rising Threshold
V1 softstart slew rate
V2 softstart slew rate
R1 = 1250 & R2 = 250 ohms
V1 & V2
VIN < 3.4
•
Thermal Shutdown
Shut down Temperature
Thermal hysteresis
Typ.
3.300
3.300
2.500
2.500
1.250
1.250
0.005
0.05
1.5
6
3.8
3.3
150
250
550
165
40
Max.
3.366
3.400
2.550
2.580
Units
V
V
V
1.275
1.290
1
0.5
V
µA
%
0.5 %
A
mA
15 mA
dB
4.2 V
3.6 V
µs
µs/V
µs/V
0.5 V
°C
°C
VIN = 3.8V
Input
Voltage
VIN
V3.3
V1.5
VIN = 3.3V
REV. 1.0.2 12/17/03
150µs
Time
Diagram 1: UVLO and Softstart Timing
3
3Pages FAN1538
Ordering Information
Part Number
FAN1538DBX
FAN1538PBX
FAN1538DAX
FAN1538PAX
Voltage Option
V1 = 3.3V, V2 = adj
V1 = 3.3V, V2 = adj
V1 = 3.3V, V2 = 2.5V
V1 = 3.3V, V2 = 2.5V
PRODUCT SPECIFICATION
Package
5-Lead DPAK in Tape and Reel
5-Lead SPAK in Tape and Reel
5-Lead DPAK in Tape and Reel
5-Lead SPAK in Tape and Reel
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
12/17/03 0.0m 005
Stock#DS30001538
2003 Fairchild Semiconductor Corporation
6 Page | |||
ページ | 合計 : 6 ページ | ||
|
PDF ダウンロード | [ FAN1538DAX 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。 |
部品番号 | 部品説明 | メーカ |
FAN1538DAX | Dual Channel 1A Low Dropout Linear Regulator with UVLO and Soft-start | Fairchild Semiconductor |