鈥?/div>
+3.3V/5V input (+12V Bias)
Adjustable Output Voltage
90% Efficiency
Differential Remote Sense
17-pin Space-Saving Package
Solderable Copper Case
Short Circuit Protection
The PT6705 is a series of low-cost,
high-performance, 13 Amp Integrated
Switching Regulators (ISRs) housed in a
unique, space-saving 17-pin SIP package.
The PT6705 will operate off either a 5V
or 3.3V input bus to provide a low-voltage
power source for the industry鈥檚 latest high-
speed, low-voltage 碌Ps, and bus drivers.
The PT6705 incorporates internal
short circuit protection, and requires a
+12V/50mA bias input for operation.
Patent pending on package assembly
Standard Application
STBY*
+12V BIAS
3
2
1
Pin-Out Information
Vout Adjust
REMOTE SENSE (+)
17
Pin Function
1
2
3
4
5
6
V
out
Adjust
STBY*
+12V Bias Input
V
in
V
in
V
in
Remote Sense Gnd
(4)
Pin Function
10
11
12
13
14
15
16
17
GND
GND
GND
V
out
V
out
V
out
V
out
Remote Sense V
out
V
IN
L1
4-6
1H
+
PT6705
8 - 12
7
13 - 16
V
OUT
C
IN
C
OUT
REMOTE
SENSE (-)
+
LOAD
7
8
9
GND
GND
GND
Cin = Required 1000碌F electrolytic
Cout= Required 330碌F electrolytic
L1 = Optional 1碌H input choke
GND
For STBY* pin
open = output enabled
ground = output disabled.
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Input Voltage Range
External Bias Voltage Range
External Bias Current
Output Voltage T
olerance
Short-Circuit Threshold
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
with C
out
= 330碌F
Efficiency
PT6705 SERIES
Symbols
I
o
V
in
V
b
I
b
鈭哣
o
I
sc
Reg
line
Reg
load
V
n
t
tr
V
os
畏
Conditions
T
a
= +60擄C, 200 LFM, pkg N
T
a
= +25擄C, natural convection
0.1A
鈮
o
鈮?3A
PT6705/6
PT6707/8
Min
0.1
(1)
0.1
(1)
4.5
3.1
11.5
鈥?/div>
V
o
-0.03
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
V
o
V
o
V
o
V
o
= 3.3V
= 2.5V
= 1.8V
= 1.5V
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
300
-40
(2)
-40
鈥?/div>
鈥?/div>
鈥?/div>
Typ
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
12.0
鈥?/div>
鈥?/div>
18
鹵5
鹵10
35
50
100
91
88
85
83
350
鈥?/div>
鈥?/div>
500
15
26
Max
13.0
13.0
5.5
5.5
13.0
50
V
o
+0.03
30
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
400
+85
(3)
+125
鈥?/div>
鈥?/div>
鈥?/div>
Units
A
V
V
mA
V
A
mV
mV
mV
碌Sec
mV
%
kHz
擄C
擄C
G
G
grams
0.1A
鈮
o
鈮?3A,
鈥?0擄C
鈮a 鈮?85擄C
0.1A
鈮
o
鈮?3A,
鈥?0擄C
鈮a 鈮?85擄C
V
in
= +5V, V
b
= +12V, I
o
=13A
-40擄C
鈮?/div>
T
a
鈮?/div>
+85擄C
V
in
= +5V, V
b
= +12V
4.5V
鈮
in
鈮?/div>
5.5V, V
b
= +12V, I
o
=13A
V
in
= +5V, Vb = +12V, 0.1
鈮
o
鈮?3A
V
in
= +5V, V
b
= +12V, I
o
=13A
I
o
step between 6.5A and 13A
V
o
over/undershoot
V
in
= +5V, I
o
= 9A, V
b
=+12V
Switching Frequency
Absolute Maximum
Operating T
emperature Range
Storage T
emperature
Mechanical Shock
Mechanical Vibration
Weight
茠
o
T
a
T
s
4.5V
鈮
in
鈮?.5V,
V
b
= +12V
0.1A
鈮?/div>
I
o
鈮?/div>
13A
Over V
in
Range
鈥?/div>
Per Mil-STD-883D, Method 2002.3
1msec, Half sine, mounted to a fixture
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
鈥?/div>
鈥?/div>
Notes:
(1) The ISR-will operate down to no load with reduced specifications.
(2) For operation below 0擄C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon廬 capacitors.
(3) See Safe Operating Area curves, or contact the factory for appropriate derating.
(4) If the remote sense ground is not used, pin 7 must be connected to pin 8 for optimum output voltage accuracy.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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