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PDF AT1391 Data sheet ( Hoja de datos )
| Número de pieza | AT1391 | |
| Descripción | 1-Channel Step-Down PWM Controller | |
| Fabricantes | Aimtron Technology | |
| Logotipo |  |
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Features
• High efficiency
• Using external P channel MOSFET
• Maximum Duty 100%
• Oscillation frequency 600KHz
• Soft Start by an external capacity
• Output voltage accuracy ±2%
• Built-in ON/OFF Function
• Built-in Short-circuit Protection
• Stand-by current max. 10µA
• Quiescent Current 1mA
• Input voltage: 2.5V ~7.0V
Applications
• Power Supply for portable devices
Block Diagram
AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
General Description
The AT1391 provides complete control and
protection for a DC/DC converter optimized for
high-performance microprocessor applications. It
is designed to drive one P-Channel in a buck
topology. The AT1391 integrates all of the control,
output adjustment, and protection functions into a
single package. The output voltage of the converter
can be precisely regulated with a maximum
tolerance of ±2% over temperature and line voltage
variations. The AT1391 is a family of low-noise
step-down DC/DC converters that is ideally suited
for systems powered from a 1-cell Li-ion battery or
from a 3-cell to 4-cell NiCd, NiMH, or alkaline
battery. It can also be used to USB-Based power
system.
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/15/2006 REV:1.1
Email:[email protected]
1
1 page  
Output Block
Output sink current
Output ON resistor
Control Block
CTL input voltage
CTL input Current
AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
Isink Duty≤5% OUT=5V 65 100
mA
ROH OUT=-15mA
18 30 Ω
ROL OUT=15mA
16 25 Ω
VIH Active mode
2.0 VCC V
VIL Standby mode
0 0.5 V
ICTL CTL=5.0V
20 µA
Application Circuit
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/15/2006 REV:1.1
Email:[email protected]
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AT1391.PDF ] | |
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