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Aimtron Technology
Aimtron Technology

AT1362A Datasheet Preview

AT1362A Datasheet

Synchronous Buck Converter

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AT1362A pdf
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Features
• Operation Voltage 2.5V~6.0V
• Oscillation frequency 1MHz
• Output Current Maximum 400mADC-DC
Converter
• Built-In 400mA/LDO
• Power Good Indicator with Time Delay
Adjustable
• Built-In Current Limit
• Built-In UVLO
• Built-In Thermal ShutDown
Applications
• Power Supply for Slim Type devices
AT1362A/B
Preliminary Product Information
Synchronous Buck Converter
With Power Good Detector & LDO
General Description
The AT1362A/B provides complete control for
a DC/DC converter optimized for
high-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 AT1362A/B 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
Vref
AGND
+
SLOPE
VREG
UVLO
Current
Sense
+
RQ
-
S
DELAY
PG
OSC
Auto
Discharge
VCC
Vref
+
-
Shoot
Throught
0.7
1uA
UVLO
-
+
R2 R1
*OUT1=2.5V/1.8V
Metal Option
-
+
0.7V
CTL
VCC
5
SW
BPC
Current
Limit
+
-
R3
R4
Vref
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
5/30/2006 REV:1.0
Email: service@aimtron.com.tw
1



Aimtron Technology
Aimtron Technology

AT1362A Datasheet Preview

AT1362A Datasheet

Synchronous Buck Converter

No Preview Available !

AT1362A pdf
Pin Assignment
1
AT1362A/B
Preliminary Product Information
Synchronous Buck Converter
With Power Good Detector & LDO
10
2
9 AT1362A
AT1362B
DC/DC
DC/DC
3
AT1362 8
2.5V
LDO
1.8V
LDO
3.3V
3.3V
47
56
DFN10 (TOP VIEW)
Ordering Information
Part Number
1362 N
Package
DFN10,Green
Marking
A:1362AN B:1362BN
Date Code
*For more marking information, contact our sales representative directly.
Pin Description
Symbol
Pin No.
1 PG
2 OUT1
3 VCC
4 SW
5 PGND
6 VBG
7 AGND
8 DELAY
9
10
Bottom
OUT2
BPC
GND
Descript
Power Good Indicator Output(Ative Hi)
DC/DC Output (2.5V or 1.8V)
Power Supply
DC/DC Inductor Node
Power Ground
Reference Output Voltage
Analog Ground
The capacitor connection terminal for LDO control and PG
delay time setup
LDO Output (3.3V)
LDO Input By-pass Capacitor Node
Analog Ground
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
5/30/2006 REV:1.0
Email: service@aimtron.com.tw
2


Part Number AT1362A
Description Synchronous Buck Converter
Maker Aimtron Technology
Total Page 13 Pages
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