ATH26K12 Series —12-V Input
26-A, 12-V Input Non-Isolated
Wide-Output Adjust Power Module
REVISION 00 (30APR2004)
Environmental & Absolute Maximum Ratings
Characteristics
Signal Input Voltages
Operating T
emperature Range
Solder Reflow T
emperature
Storage T
emperature
Mechanical Shock
Mechanical Vibration
Weight
Flammability
—
—
Ta
T reflow
Ts
(Voltages are with respect to GND)
Min
–0.3
–0.3
–40
–40
—
—
—
Typ
—
—
—
—
500
15
10
Max
V
in
+ 0.3
5
85
235
(i)
125
—
—
—
Units
V
°C
°C
°C
G’s
G’s
grams
Symbols
Conditions
Track control (pin 11)
Inhibit control (pin 4)
Over V
in
Range
Surface temperature of module body or pins
—
Per Mil-STD-883D, Method 2002.3
1 msec, �½ Sine, mounted
Mil-STD-883D, Method 2007.2
20-2000 Hz
Meets UL 94V-O
Notes:
(i) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum.
Specifications
Characteristics
Output Current
(Unless otherwise stated, T
a
=25 °C, V
in
=12 V, V
out
=3.3 V, C
in
=560 µF, C
out
=0 µF, and I
o
=I
o
max)
Symbols
Io
V in
Conditions
60 °C, 200 LFM airflow
25 °C, natural convection
Over I
o
range
–40 °C <T
a
< +85 °C
Over V
in
range
Over I
o
range
Includes set-point, line, load,
–40 °C
≤
T
a
≤
+85 °C
I
o
=18 A
R
SET
= 280
Ω
V
o
=
5.0 V
R
SET
= 2.0 kΩ V
o
=
3.3 V
R
SET
= 4.32 kΩ V
o
=
2.5 V
R
SET
= 11.5 kΩ V
o
=
1.8 V
R
SET
= 24.3 kΩ V
o
=
1.5 V
R
SET
= open cct. V
o
=
1.2 V
20 MHz bandwidth
All voltages
Reset, followed by auto-recovery
1 A/µs load step, 50 to 100 % I
o
max,
C
out
=330 µF
Recovery Time
V
o
over/undershoot
With V
o
Adjust control
Pin to GND
Pin to GND
C
out
≤
C
out
(max)
V
in
increasing
V
in
decreasing
Referenced to GND
Pin to GND
Inhibit (pin 4) to GND, Track (pin 11) to V
in
Over V
in
and I
o
ranges
non-ceramic
ceramic
Equiv. series resistance (non-ceramic)
Per Bellcore TR-332
50 % stress, T
a
=40 °C, ground benign
Capacitance value
Min
0
0
10.2
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
8
2.5
–0.2
—
—
475
560
(5)
0
0
4
(8)
3
ATH26K12
Typ
—
—
—
—
±0.5
±5
±5
—
94.5
92.7
91.4
89.5
88.2
86.2
25
50
50
150
±5
– 8
(3)
—
—
9.5
8.5
—
—
–0.5
10
575
—
330
(6)
—
—
—
Max
26
(1)
26
(1)
13.8
±2
(2)
—
—
—
±3
—
—
—
—
—
—
—
—
—
—
—
—
–0.13
1
10
—
Open
0.5
—
—
675
—
7,150
300
—
—
(2)
Units
A
V
%V
o
% Vo
Input Voltage Range
Set-Point Voltage T
olerance
T
emperature Variation
Line Regulation
Load Regulation
T
otal Output Variation
Efficiency
V
o
tol
∆Reg
temp
∆Reg
line
∆Reg
load
∆Reg
tot
η
mV
mV
%V
o
%
V
o
Ripple (pk-pk)
Over-Current Threshold
Transient Response
Vr
I
o
trip
t
tr
∆V
tr
V
o
adj
I
IL
margin
I
IL
track
dV
track
/dt
UVLO
V
IH
V
IL
I
IL
inhibit
I
in
inh
ƒ
s
C
in
C
out
mVpp
A
µSec
mV
%
µA
mA
V/ms
V
(4)
Margin Up Down Adjust
Margin Input Current (pins 12 /13)
Track Input Current (pin 11)
Track Slew Rate Capability
Under-Voltage Lockout
Inhibit Control (pin4)
Input High Voltage
Input Low Voltage
Input Low Current
Input Standby Current
Switching Frequency
External Input Capacitance
External Output Capacitance
(3)
V
mA
mA
kHz
µF
(7)
µF
mΩ
10
6
Hrs
Reliability
MTBF
Notes:
(1) See SOA curves or consult factory for appropriate derating.
(2) The set-point voltage rolerance is affected be the tolerance and stability of R
SET
. The stated limit is unconditionally met if R
SET
has a tolerance of 1 %
with 100 ppm/°C or better temperature stability.
(3) A small low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc.
(4) This control pin has an internal pull-up to 5 V nominal. If it is left open-circuit the module will operate when input power is applied. A small low-
leakage (<100 nA) MOSFET is recommended for control. For further information, consult the related application note.
(5) A 560 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimum of 500 mArms of ripple current.
(6) An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load will improve the transient response.
(7) This is the calculated maximum. The minimum ESR limitation will often result in a lower value. Consult the application notes for further guidance.
(8) This is the typcial ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 mΩ as the minimum when using max-ESR values to calculate.
North America (USA): 1-888-41-ASTEC
Europe (UK): 44(1384)842-211
Asia (HK): 852-2437-9662
ASTEC [ Astec America, Inc ]
