DataSheet.jp

AX3504A の電気的特性と機能

AX3504AのメーカーはAXEliteです、この部品の機能は「2A Synchronous Step-Down Converter」です。


製品の詳細 ( Datasheet PDF )

部品番号 AX3504A
部品説明 2A Synchronous Step-Down Converter
メーカ AXElite
ロゴ AXElite ロゴ 




このページの下部にプレビューとAX3504Aダウンロード(pdfファイル)リンクがあります。
Total 10 pages

No Preview Available !

AX3504A Datasheet, AX3504A PDF,ピン配置, 機能
AX3504/A
1.2MHz, 2A Synchronous Step-Down Converter
™ GENERAL DESCRIPTION
The AX3504/A is a 1.2MHz constant frequency current mode PWM step-down converter. It
is ideal for portable equipment requiring very high current up to 2A from single-cell Lithium-ion
batteries while still achieving over 90% efficiency during peak load conditions. The AX3504/A
also can run at 100% duty cycle for low dropout operation, extending battery life in portable
systems while light load operation provides very low output ripple for noise sensitive applications.
The AX3504/A can supply up to 2A output load current from a 2.5V to 5.5V input voltage and the
output voltage can be regulated as low as 0.6V. The high switching frequency minimizes the
size of external components while keeping switching losses low. The internal slope
compensation setting allows the device to operate with smaller inductor values to optimize size
and provide efficient operation. The AX3504/A is available in adjustable (0.6V to VIN) output
voltage. The device is available in SOP8 Pb-free and DFN-10L packages.
™ FEATURES
- 2.5V to 5.5V Input Voltage Range
- Output Voltages from 0.6V to VIN
- High Efficiency: Up to 95%
- 1.2MHz Constant Frequency Operation
- 2A Output Current
- No Schottky Diode Required
- Low RDS(ON) Internal Switches: 0.15
- Current Mode Operation for Excellent Line and Load Transient Response
- Current limit, Enable function
- Short Circuit Protect (SCP)
- Build-in Soft Start function
- 1µA Shutdown Current
- SOP8 Pb-Free and DFN-10L packages
AXElite Confidential Materials, do not copy or distribute without written consent .
www.gofotech.com Tel: 0755-61358292
1/10
Rev.0.4 May.16, 2008

1 Page





AX3504A pdf, ピン配列
AX3504/A
Name
EN
PVIN
SVIN
LX
SGND
PGND
FB
Description
Enable pin
Hnormal operation
LShutdown
Power Supply Input Pin
Signal Supply Input Pin
Switch output pin. Connect external inductor here. Minimize trace area
at this pin to reduce EMI.
Signal Ground Pin
Power Ground Pin
Output Feedback pin
™ RDER/MARKING INFORMATION
Order Information
AX3504 X XX X
Pin Type Package Type Packing
Blank: AX3504 S: SOP-8L
A : Taping
A: AX3504A Z1: DFN-10L (3*3)
Logo
Top Marking
AX 3504
XXXXXX
Part number
ID code: internal
WW: 01~52
Year : 07 = 2007
Blank:AX3504
A:AX3504A
™ Absolute Maximum Ratings (at TA=25)
Characteristics
Symbol
Rating
Unit
PVIN, SVIN Pin Voltage
VIN VSS - 0.3 to VSS + 6
V
Feedback Pin Voltage
VFB VSS - 0.3 to VCC + 0.3
V
EN Pin Voltage
VRUN VSS - 0.3 to VCC + 0.3
V
Switch Pin Voltage
VSW VSS - 0.3 to VCC + 0.3
V
Power Dissipation
PD ( TJ-TA ) / θJA mW
Storage Temperature Range
TST -40 to +150
Operating Temperature Range
TOP -40 to +85
Junction Temperature
Thermal Resistance from Junction to case
TJ +125
θJC SOP8
20
/W
Thermal Resistance from Junction to ambient θJA SOP8
55
/W
Note1 : θJA is measured with the PCB copper area of approximately 1 in2(Multi-layer). that need connect to VSS pin
of the AX3504/A.
AXElite Confidential Materials, do not copy or distribute without written consent .
www.gofotech.com Tel: 0755-61358292
3/10
Rev.0.4 May.16, 2008


3Pages


AX3504A 電子部品, 半導体
AX3504/A
™ Application Information
Setting the Output Voltage
Application circuit item shows the basic application circuit with AX3504/A adjustable output
version. The external resistor sets the output voltage according to the following equation:
V OUT
=
0.6V
× ⎜⎛1 +
R1
R2
⎟⎞
Table 1 Resistor select for output voltage setting
VOUT
R2
R1
1.2V 300K 300K
1.5V 300K 450K
1.8V 300K 600K
2.5V 300K 950K
Inductor Selection
For most designs, the AX3504/A operates with inductors of 1µH to 4.7µH. Low inductance
values are physically smaller but require faster switching, which results in some efficiency
loss. The inductor value can be derived from the following equation:
V (V V )× −
= OUT
IN OUT
L V I f× ×
IN L OSC
Where is inductor Ripple Current. Large value inductors lower ripple current and small
value inductors result in high ripple currents. Choose inductor ripple current approximately
35% of the maximum load current 2000mA, IL=700mA.
Table 2 Inductor select for output voltage setting (VCC=3.6V)
VOUT
1.2V 1.5V
1.8V
Inductor
3uH 3uH
3uH
Part Number
WE-TPC
744052003 744052003 744052003
Note: Part type L (www.we-online.com)
2.5V
2.5uH
744052002
For output voltages above 2.0V, when light-load efficiency is important, the minimum
recommended inductor is 2.5µH. For optimum voltage-positioning load transients, choose an
inductor with DC series resistance in the 30mto 100mrange. For higher efficiency at
heavy loads (above 200mA), or minimal load regulation (but some transient overshoot), the
resistance should be kept below 100m. The DC current rating of the inductor should be at
least equal to the maximum load current plus half the ripple current to prevent core saturation
(2000mA+350mA).
6/10
AXElite Confidential Materials, do not copy or distribute without written consent .
www.gofotech.com Tel: 0755-61358292
Rev.0.4 May.16, 2008

6 Page



ページ 合計 : 10 ページ
 
PDF
ダウンロード
[ AX3504A 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
AX3504

2A Synchronous Step-Down Converter

AXElite
AXElite
AX3504A

2A Synchronous Step-Down Converter

AXElite
AXElite


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