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PDF AT1366B Data sheet ( Hoja de datos )
| Número de pieza | AT1366B | |
| Descripción | 800mA Synchronous Buck Converter | |
| Fabricantes | Aimtron Technology | |
| Logotipo |  |
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AT1366B
Preliminary Product Information
1MHz,800mA Synchronous Buck Converter
Features
• High efficiency (95%) possible
• No Schottky Diode Required
• 800mA Output Current at 5V input 3.3V output
• Oscillation frequency 1.0MHz
• Built-in ON/OFF Function
• Built-in Short Circuit Protection
• Low Dropout Operation: 100% Duty Cycle
• Stand-by current max. 1µA
• Input voltage: 2.5V ~5.5V
Applications
• Power Supply for portable devices
General Description
The AT1366B provides complete control for a
DC/DC converter optimized for high-performance
microprocessor applications. It is operated on
current mode architecture for excellent line and
load transient response. 1MHz operation frequency
is allowing the use of small surface mount inductor
and capacitor. The internal synchronous switch
increases efficiency and eliminates the need for an
external Schottky diode. The AT1366 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.
Block Diagram
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
1/18/2006 REV:1.2
Email:[email protected]
1
1 page  
AT1366B
Preliminary Product Information
1MHz,800mA Synchronous Buck Converter
Typical characteristics : (refer to Figure 2)
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
1/18/2006 REV:1.2
Email:[email protected]
5
5 Page 
The Dissipation
The power loss is given by:
AT1366B
Preliminary Product Information
1MHz,800mA Synchronous Buck Converter
PLOSS
=
I
2
O
×
RDS (ON )−P
×
D
+
I
2
O
×
RDS (ON )−N
× (1 − D) + VIN
× IO × (tr
+tf )×
fs
+ I s ×VIN
TJ (MAX ) = TA + θ JA × PLOSS
Inductance(µH)
3.3
4.7
3.3
3.3
4.7
Capacitance(µF)
22
47
10
4.7
Inductors Surface Mount
Manufacturer/Part No.
Sumida CDRH4D28-3R3
Sumida CDRH5D18-4R7
Mitsumi C3-K1.8L-3R3
Mitsumi C4-K1.8L-3R3
ABC SH40283R3YSB
ABC SH40284R7YSB
Manufacturer Website
www.sumida.com
www.mitsumi.co.jp
www.atec-group.com
Capacitors Surface Mount
Manufacturer/Part No.
TDK C3216X5R0J226M
TDK C3225X5R0J46M
GRM42-6X5R 106K6.3
TAIYO JMK212BJ475MG
Manufacturer Website
www.tdk.com
www.tdk.com
www.murata.com
www.t-yuden.com
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
1/18/2006 REV:1.2
Email:[email protected]
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AT1366B.PDF ] | |
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