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AS1324-12 参数 Datasheet PDF下载

AS1324-12图片预览
型号: AS1324-12
PDF下载: 下载PDF文件 查看货源
内容描述: 1.5MHz的, 600毫安, DC / DC降压型稳压器 [1.5MHz, 600mA, DC/DC Step-Down Regulator]
分类和应用: 稳压器
文件页数/大小: 20 页 / 910 K
品牌: AMSCO [ AUSTRIAMICROSYSTEMS AG ]
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AS1324
1 . 5 M H z , 6 0 0 m A , D C / D C St e p - D o w n R e g u l a t o r
D a ta S he e t
1 General Description
The AS1324 is a high-efficiency, constant-frequency
synchronous buck converter available in adjustable- and
fixed-voltage versions. The wide input voltage range
(2.7V to 5.5V), automatic powersave mode and minimal
external component requirements make the AS1324
perfect for any single Li-Ion battery-powered application.
Typical supply current with no load is 30µA and
decreases to
≤1µA
in shutdown mode.
The AS1324 is available as the standard versions listed
in
Table 1. Standard Versions
Model
AS1324-AD
AS1324-12
AS1324-15
AS1324-18
Output Voltage
Adjustable via External Resistors
Fixed: 1.2V
Fixed: 1.5V
Fixed: 1.8V
2 Key Features
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High Efficiency: Up to 96%
Output Current: 600mA
Input Voltage Range: 2.7V to 5.5V
Constant Frequency Operation: 1.5MHz
Variable- and Fixed-Output Voltages
No Schottky Diode Required
Automatic Powersave Operation
Low Quiescent Current: 30µA
Internal Reference: 0.6V
Shutdown Mode Supply Current:
≤1µA
Thermal Protection
5-pin TSOT-23 Package
An internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. The
internally fixed switching frequency (1.5MHz) allows for
the use of small surface mount external components.
Very low output voltages can be delivered with the inter-
nal 0.6V feedback reference voltage.
The AS1324 is available in a 5-pin TSOT-23 package.
3 Applications
The device is ideal for mobile communication devices,
laptops and PDAs, ultra-low-power systems, threshold
detectors/discriminators, telemetry and remote systems,
medical instruments, or any other space-limited applica-
tion with low power-consumption requirements.
Figure 1. Typical Application Diagram – High Efficiency Step Down Converter
V
IN
= 2.7V to 5.5V
C
IN
10µF
4
VIN
3
SW
4.7µH
V
OUT
= 1.8V, 600mA
C
OUT
10µF
EN 1
5 VOUT
AS1324-
18
1
EN
5
VOUT
GND 2
AS1324-
18
SW 3
4 VIN
2
GND
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Revision 1.03
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