ATH26K12 Series - 12-V Input
26-A, 12-V Input Non-Isolated
Wide-Output Adjust Power Module
REVISION 00 (30APR2004)
Features
NOMINAL SIZE =
1.37 in x 1.12 in
(34,8 mm x 28,5 mm)
•
Up to 26 A Output Current
•
12-V Input Voltage
•
Wide-Output Voltage Adjust
(1.2 V to 5.5 V)
•
Efficiencies up to 94 %
•
235 W/in³ Power Density
•
On/Off Inhibit
•
Output Voltage Sense
•
Pre-Bias Startup
•
Margin Up/Down Controls
•
Dual-Phase Topology
•
Auto-Track™ Sequencing
•
Under-Voltage Lockout
•
Output Over-Current Protection
(Non-Latching, Auto-Reset)
•
Over-Temperature Protection
•
Operating T
emp: –40 to +85 °C
•
Safety Agency Approvals:
UL 1950, CSA 22.2 950, EN60950
VDE (Pending)
•
Point-of-Load Alliance (POLA)
Compatible
Description
The ATH26K12 is a series of high-
current non-isolated power module. This
product is characterized by high efficien-
cies, and up to 26 A of output current,
while occupying a mere 1.64 in² of PCB
area. In terms of cost, size, and perfor-
mance, the series provides OEM’s with a
flexible module that meets the require-
ments of the most complex and
demanding mixed-signal applications.
These include the most densly populat-
ed, multi-processor systems that
incorporate high-speed DSP’s, micropro-
cessors, and ASICs.
The series uses double-sided surface
mount construction and provides high-
performance step-down power conversion
from a 12-V input bus voltage. The out-
put voltage of the ATH26K12 can be set
to any value over the range, 1.2 V to
5.5 V, using a single resistor.
This series includes Auto-Track™.
Auto-Track simplifies power-up and
power-down supply voltage sequencing
in a system by enabling modules to track
each other, or any other external voltage.
Each model also includes an on/off
inhibit, output voltage adjust (trim), and
margin up/down controls. An output
voltage sense ensures tight load regulation,
and an output over-current and thermal
shutdown feature provide for protection
against external load faults.
Package options inlude both through-
hole and surface mount connfigurations.
Pin Configuration
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Function
GND
V
in
GND
Inhibit *
V
o
Adjust
V
o
Sense
GND
V
out
V
out
GND
Track
Margin Down *
Margin Up *
* Denotes negative logic:
Open
= Normal operation
Ground = Function active
Standard Application
Track
Margin Down
Margin Up
13
1
12
11
10
ck™
o-Tra g
Aut
cin
quen
Se
Rset = Required to set the output voltage to a value
higher than 1.2 V. (See spec. table for values)
Cin = Required electrolytic 560 µF
Cout = Optional 330 µF electrolytic
V
IN
2
ATH26K12-9S
(Top View)
PTH12030W
9
8
7
V
OUT
3
4
5
6
Inhibit
V
o
Sense
C
IN
560 µF
(Required)
R
SET
1 %, 0.1 W
(Required)
C
OUT
330 µF
(Optional)
L
O
A
D
GND
GND
North America (USA): 1-888-41-ASTEC
Europe (UK): 44(1384)842-211
Asia (HK): 852-2437-9662
ASTEC [ Astec America, Inc ]
