ATH22T033 Series —3.3-V Input
22-A, 3.3-V Input Non-Isolated
Wide-Output Adjust Power Module
REVISION 00 (3DEC2003)
Features
•
Up to 22-A Output Current
•
3.3-V Input Voltage
•
Wide-Output Voltage Adjust
(0.8 V to 2.5 V)
•
Efficiencies up to 93 %
•
120 W/in³ Power Density
•
On/Off Inhibit
•
Output Voltage Sense
•
Pre-Bias Startup
•
Margin Up/Down Controls
•
Under-Voltage Lockout
•
Auto-Track™ Sequencing
•
Output Over-Current Protection
(Non-Latching, Auto-Reset)
•
Over-T
emperature Protection
•
Operating Temp: –40 to +85 °C
•
IPC Lead Free 2
•
Safety Agency Approvals (Pending)
UL 1950, CSA 22.2 950, &
EN60950
•
Point-of-load Alliance (POLA)
Compatible
NOMINAL SIZE =
1.5 in x 0.87 in
(38,1 mm x 22,1 mm)
Description
The ATH22T033 series of non-isolated
power modules offers OEM designers a
combination of high performance, small
footprint, and industry leading features.
As part of a new class of power modules
these products provide designers with the
flexibility to power the most complex
multi-processor digital systems using
off-the-shelf catalog parts.
The series employs double-sided surface
mount construction and provides high-
performance step-down power conversion
for up to 22 A of output current from a
3.3-V input bus voltage. The output volt-
age of the ATH22T033 can be set to any
value over the range, 0.8 V to 2.5 V, using
a single resistor.
This series includes Auto-Track™.
Auto-Track simplifies the task of supply
voltage sequencing in a power system by
enabling modules to track each other, or
any external voltage, during power up and
power down.
Other operating features include an
on/off inhibit, output voltage adjust (trim),
and margin up/down controls. To ensure
tight load regulation, an output voltage
sense is also provided. A non-latching
over-current trip and over-tempterature
shutdown provide load fault protection.
Target applications include complex
multi-voltage, multi-processor systems
that incorporate the industry’s high-speed
DSPs, micro-processors and bus drivers.
Pin Configuration
Pin
1
2
3
4
5
6
7
8
9
10
Function
GND
V
in
Inhibit *
V
o
Adjust
V
o
Sense
V
out
GND
Track
Margin Down *
Margin Up *
* Denotes negative logic:
Open
= Normal operation
Ground = Function active
k™
-Trac g
Auto ncin
e
Sequ
Standard Application
Track
Margin Down
Margin Up
10
1
9
8
7
R
set
= Resistor to set the desired output
voltage (see spec. table for values).
Cin = Required electrolytic 1,000 µF
Cout = Recommended 330 µF electrolytic
PTH03020W
ATH22T033-9S
V
IN
(Top View)
2
6
V
OUT
3
4
5
Inhibit
V
o
Sense
L
O
A
D
GND
North America (USA): 1-888-41-ASTEC
Europe (UK): 44(1384)842-211
+
C
IN
1,000 µF
(Required)
R
SET
(Required)
0.1 W, 1 %
C
OUT
330 µF
(Optional)
GND
+
Asia (HK): 852-2437-9662
ASTEC [ Astec America, Inc ]
