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부품번호 | AT1796 기능 |
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기능 | Step-Down Switching Regulator | ||
제조업체 | Aimtron Technology | ||
로고 | |||
전체 12 페이지수
www.DataSheet4U.com
AT1796
Preliminary Product Information
150kHz, 3A Step-Down Switching Regulator
Features
․3.3V and 5V output versions
․Guaranteed 3A output load current
․Requires small number ofexternal components
․Excellent line and load regulation
․150kHz fixed frequency internal oscillator
․Built-in TTL On/Off Control
․Low power standby mode, IQ typically 80uA
․Built-in current limit protection
․Built-in thermal shutdown circuit.
․Operating voltage: 4.5V~25V
․TO-265 package
Applications
High-efficiency step-down regulator
TFT Scalar Board
On-card switching regulators
Description
The AT1796 series of regulators are step-down
(buck) DC/DC converter, capable of driving a
3A load with excellent line and load regulation.
Requiring a minimum number of external
components, these regulators are simple to use .
The AT1796 series operates at a switching
frequency of 150kHz.Available in a standard
5-lead TO-263 surface mount package. It include
a guaranteed ±4% tolerance on output voltage
under specified input voltage and output load
conditions, and ±15% on the oscillator
frequency.
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
2/15/2006 REV : 1.1
Email: [email protected]
1
AT1796
Preliminary Product Information
150kHz, 3A Step-Down Switching Regulator
Electrical characteristics
(VCC = 12V , Ta =+25 , unless otherwise noted. )
Parameter
Quiescent Current
Symbol
IOC
Condition
Values
Unit
Min. Typ. Max.
-- 5 10 mA
Stand-by
quiescent Current
SHDN pin logic input
voltage threshold
SHDN pin logic input
current
<AT1796-3.3V>
Output voltage
Efficiency
ISQC
VIL
VIH
IIL
IIH
VOUT
η
SHDN = 5V
Active mode
Standby mode
Active mode
Standby mode
4.75 Vcc 28V
0.2A ILOAD 3A
Vin = 12V , ILOAD = 3A
-- 80 200 µA
-- -- 0.6 V
2.0 --
-- V
-- 0.02 5 µA
-- 5 15 µA
3.168 3.3 3.432 V
73 -- -- %
<AT1796-5.0V>
Output voltage
Efficiency
VOUT
η
4.75 Vcc 28V
0.2A ILOAD 3A
Vin = 12V , ILOAD = 3A
4.8 5.0 5.2 V
-- 80 -- %
<AT1796-ADJ>
FB voltage
Efficiency
<Device parameters>
Saturation voltage
Oscillator frequency
Maximum duty cycle
Minimum duty cycle
Current limit
Output leakage current
VFB
4.75 Vcc 28V
0.2A ILOAD 3A
η
Vin = 12V , ILOAD = 3A ,
VOUT = 3V
1.193 1.230 1.267 V
-- 73 -- %
VSAT
FOSC
DMAX
DMIN
ICL
IL1
IL2
ILOAD = 3A
FB = 0V
FB = 3.3V or 5V
Peak current
No diode . capacitor , inductor
FB = 12V ,
Switching OFF , OUT = 0V
Vcc =28V
-- 1.15 1.5 V
127 150 173 kHz
-- 100 -- %
-- 0 -- %
3.6 4.5 5.0 A
-- 50 -- µA
-- 2 30 mA
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
2/15/2006 REV : 1.1
Email: [email protected]
4
4페이지 AT1796
Preliminary Product Information
150kHz, 3A Step-Down Switching Regulator
Adjustable Output Application Example :
VOUT
= VFB (1 +
R2)
R1
VFB = 1.23V
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
2/15/2006 REV : 1.1
Email: [email protected]
7
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |