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參數資料
| 型號： | AMS4122S |
| 廠商： | Advanced Monolithic Systems, Inc. |
| 英文描述： | SINGLE 4A/DUAL 2A BUCK CONVERTER IN SO8 |
| 中文描述： | 單4A/DUAL甲BUCK變換器采用SO8 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 542K |
| 代理商： | AMS4122S |
Advanced
AMS4122
Monolithic
SINGLE 4A/DUAL 2A BUCK CONVERTER IN SO8
Systems
FEATURES
2 Independent Asynchronous Buck Converters in SO-8
Audio Power Amplifiers
Internally compensated
Portable (Notebook) Computers
Built in soft start
Point of regulation for high performance electronics
Enable with Zero current shut down
Consumer Electronics
400KHz switching per output
Desktop Computers
Interleaved oscillator to reduced supply ripple
LCD TVs and LCD monitors
Simply re-configures to 2 phase single output
Distributed Power Systems
Up to 4A output in 2 phase mode
Battery Chargers
Independent hiccup current limit
Pre-Regulator for Linear Regulators
GENERAL DESCRIPTION
AMS4122 is a dual switching regulator capable to deliver 2A for each channel. Internally Compensated internal Soft Start
makes AMS4122 one of the simplest and easiest switching regulators to use with the minimum external components. Each
regulator has independent hiccup current limit. The Enable pin turns both devices on when a voltage of 2.5V or higher it is
applied to EN pin. Since both devices share one single package the thermal protection turns off both devices when the die
temperature exceeds approximately 135°C. Both regulators are adjustable using a 0.600V reference for low output voltage
settings. The oscillators are 180° phase to each other to reduce the ripples on the input power supply and minimize the power
dissipation on the package. The device can be easily configured for Two Phase single output switching regulator capable of 5A
output load. By applying a 2.5V or greater on feedback pin of the second switching regulator the device enters in Two Phase
Mode. The first benefit of having a Two Phase device is reducing the output ripples by a factor of four as the single phase. The
second benefit is higher output current capability at overall low cost. AMS4122 combined with AMS4123 (2A Switching
Regulator + 1A LDO in SO-8) makes complete solution for LCD TV power requirements.
ORDERING INFORMATION
TYPICAL APPLICATION
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
RoHS compliant
APPLICATIONS
PINCONNECTIONS
Package Type
SOIC EDP
AMS4122S
TEMP. RANGE
-25°C to 125°C
8L SOIC
SO Package (S)
2
8
3
4
7
6
5
EN
F/B1
F/B2
AVIN
PVIN
GND
1
SW1
SW2
Top View
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