|
AT1367A Datasheet, PDF (1/14 Pages) Aimtron Technology – 1MHz, 800mA Synchronous Buck Converter With Power Good Detector & LDO | |||
|
AT1367A/B/C/D
Preliminary Product Information
1MHz, 800mA Synchronous Buck Converter
With Power Good Detector & LDO
Features
General Description
⢠Operation Voltage 2.5V~6.0V
The AT1367A/B/C/D provides complete
⢠Oscillation frequency 1MHz
control for a DC/DC converter optimized for
⢠Output Current Maximum 800mAï¼DC-DC hight-performance microprocessor applications. It
Converterï¼
consists of a synchronous step-down DC/DC
⢠Built-In 400mA/LDO
converter and a high-speed LDO regulator
⢠Power Good Indicator with Time Delay
connected in series with the DC/DC converter
Adjustable
output. A power good detector and LDO ON/OFF
⢠Built-In Current Limit
control is also built-in(metal option). DC/DC
⢠Built-In UVLO
converter is operated on current mode architecture
⢠Built-In Thermal ShutDown
for excellent line and load transient response.
⢠Built-In LDO ON/OFF Controlï¼Metal Optionï¼ 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
Applications
⢠Power Supply for Slim Type devices
diode. The AT1367A/B/C/D is a family of
low-noise synchronous step-down DC/DC
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.
Block Diagram
VBG
VBG
VREG
UVLO
Vref
Current
Sense
5
AGND
+
+
SLOPE
-
RQ
S
CTL
DELAY
PG
/PG
OSC
Control
LDO
CTL
Vref
+
R5
VCC
-
Auto
Discharge
*CTL and /PG
Metal Option
0.9 x
Vref
R2
0.35uA
UVLO
-
+
Vref
Shoot
Throught
R1
Current
Limit
R3
+
CTL
R4
-
*OUT2=2.5V/1.8V
Metal Option
Vref
VCC
SW
PGND
OUT1
OUT2
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
3/2/2006 REV:1.2
Email: service@aimtron.com.tw
1
|
▷ |