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參數(shù)資料
| 型號(hào)： | AT1367DN |
| 廠商： | Aimtron Technology Corp. |
| 英文描述： | 1MHz, 800mA Synchronous Buck Converter With Power Good Detector & LDO |
| 中文描述： | 1MHz的，800mA的同步降壓轉(zhuǎn)換器與電源良好探測(cè)器 |
| 文件頁(yè)數(shù)： | 1/14頁(yè) |
| 文件大?。?/td> | 659K |
| 代理商： | AT1367DN |
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AT1367A/B/C/D
Preliminary Product Information
1MHz, 800mA Synchronous Buck Converter
With Power Good Detector & LDO
General Description
The AT1367A/B/C/D provides complete
control for a DC/DC converter optimized for
hight-performance microprocessor applications. It
consists of a synchronous step-down DC/DC
converter and a high-speed LDO regulator
connected in series with the DC/DC converter
output. A power good detector and LDO ON/OFF
control is also built-in(metal option). DC/DC
converter 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 AT1367A/B/C/D is a family of
low-noise
converters that is ideally suited for systems
powered form 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.
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
3/2/2006
REV:1.2
Email:
service@aimtron.com.tw
1
Features
Operation Voltage 2.5V~6.0V
Oscillation frequency 1MHz
Output Current Maximum 800mA
（
DC-DC
Converter
）
Built-In 400mA/LDO
Power Good Indicator with Time Delay
Adjustable
Built-In Current Limit
Built-In UVLO
Built-In Thermal ShutDown
Built-In LDO ON/OFF Control
（
Metal Option
）
Applications
Power Supply for Slim Type devices
synchronous
step-down
DC/DC
Block Diagram
Current
Sense
OSC
+
SLOPE
R
S
Q
SW
Vref
+
-
/PG
VCC
PGND
Shoot
Throught
PG
DELAY
OUT2
OUT1
+
-
Vref
Current
Limit
5
UVLO
VREG
Vref
-
+
Vref
R2
R1
UVLO
*OUT2=2.5V/1.8V
Metal Option
CTL
Control
LDO
CTL
CTL
Auto
Discharge
VCC
0.9 x
Vref
R4
R3
*CTL and /PG
Metal Option
0.35uA
R5
VBG
VBG
AGND
+
-
Aimtron reserves the right without notice to change this circuitry and specifications.
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