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PDF AT1369 Data sheet ( Hoja de datos )
| Número de pieza | AT1369 | |
| Descripción | 2-Channel Synchronous Buck PWM Controller | |
| Fabricantes | Aimtron Technology | |
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AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Features
• High efficiency (min. 90% On IO=300mA
~600mA)
• Using external P and N channel MOSFET
• Maximum Duty 100%
• Oscillation frequency 300KHz or 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 1.5mA
• Built-in Power Good reset circuit
• Input voltage: 2.5V ~7.0V
Applications
• Slim-Type CD-ROM/DVD-ROM/CD-RW
• Power Supply for portable devices
Block Diagram
General Description
The AT1369 provides complete control and
protection for a DC/DC converter optimized for
high-performance microprocessor applications. It
is designed to drive one P-Channel and one N-
Channel MOSFETs in a synchronous-rectified
buck topology. The AT1369 integrates all of the
control, output adjustment, monitoring 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
AT1369 is a family of low-noise synchronous 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.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
1
1 page  
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
PDRV1,2 Output
Block
NDRV1,2 Output
Block
Control Block
RESET Monitor
Block
Output source current
Output sink current
Output ON resistor
Output source current
Output sink current
Output ON resistor
CTL input voltage
CTL input Current
VCC reset ON voltage
VCC reset hysteresis
3V3 reset ON voltage
3V3 reset hysteresis
EI reset ON voltage
EI reset hysteresi
Reset output voltage
Reset leakage current
Isource
Isink
ROH
ROL
Isource
Isink
ROH
ROL
VIH
VIL
ICTL
Duty≥95% PDRV=0V - -130 -80 mA
Duty≤5% PDRV=5V 65 100
mA
PDRV=-15mA
10 20 Ω
PDRV=15mA
10 20 Ω
Duty≥95% NDRV=0V - -130 -80 mA
Duty≤5% NDRV=5V 65 100
mA
NDRV=-15mA
10 20 Ω
NDRV=15mA
10 20 Ω
Active mode
Standby mode
CTL=5.0V
VCC-
1
0
VCC V
VCC/
2
V
20 µA
VRSTON1
4.10 4.20 4.30 V
VRSTON1 hys
-100 100 mV
VRSTON2
2.94 3.0 3.06 V
VRSTON2 hys
-60 60 mV
VRSTON3
1.12 1.22 1.32 V
VRSTON hys
VOL IL =1mA
-100 - 100 MV
0.4 V
ILeak 2.0 µA
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
5
5 Page 
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
How to control CH1 and CH2 ON/OFF:
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AT1369.PDF ] | |
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