Standard Application
For STBY* pin; open = output enabled; ground = output
disabled.
Pin-Out Information
Pin Function
1 VID0
2 VID1
3 VID2
4 VID3
5 STBY* - Stand-by
6 VID4
7V
in
8V
in
9V
in
Pin Function
10 V
in
11 V
in
12 Remote Sense Gnd
13 GND
14 GND
15 GND
16 GND
17 GND
18 GND
PT7707
The PT7707 is a new series of
high-performance, 18 Amp Integrated
Switching Regulators (ISRs) housed in
a 27-pin SIP package. The 18A capability allows easy integration of the
latest high-speed, low-voltage µPs and
bus drivers into existing 5V systems.
The PT7707 series has been designed to work in parallel with one or
more of the PT7749 - 18A current
boosters for increased I
out
in incre-
ments of 18A.
The output voltage of the PT7707
can be easily programmed from 1.3V
to 3.5V with a 5 bit input compatible
with Intel’s Pentium
II Processor.
A differential remote sense is also provided which automatically compensates
for any voltage drop from the ISR to
the load.
Only 330µF of output capacitance
are required for proper operation.
For assistance or to order, call (800) 531-5782
Cin= Required 1200µF electrolytic
C
out
= Required 330µF electrolytic
L1 = Optional 1µH input choke
Pin Function
19 GND
20 V
out
21 V
out
22 V
out
23 V
out
24 V
out
25 V
out
26 Remote Sense V
out
27 Sync Out
Specifications
Characteristics
PT7707 SERIES
(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units
Output Current I
o
Ta = +60°C, 200 LFM, pkg N 0.1
*
—18**A
Ta = +25°C, natural convection 0.1
*
—15**A
Input Voltage Range V
in
0.1A ≤ I
o
≤ 15A 4.5
***
— 5.5 V
Output Voltage Tolerance ∆V
o
V
in
= +5V, Io = 15A
V
o-0.03 — Vo+0.03 V
0°C ≤ Ta ≤ +65°C
Line Regulation Reg
line
4.5V ≤ V
in
≤ 5.5V, I
o
= 15A — ±10 — mV
Load Regulation Reg
load
Vin = +5V, 0.1 ≤ I
o
≤ 15A — ±10 — mV
Vo Ripple/Noise V
n
V
in
= +5V, Io = 15A — 50 — mV
Transient Response t
tr
Io step between 7.5A and 15A — 100 — µSec
with C
out
= 330µF V
os
Vo over/undershoot — 200 — mV
Efficiency η V
in
= +5V, Io = 10A Vo = 3.3V — 89 — %
V
o
= 2.9V — 87 — %
V
o
= 2.5V — 85 — %
V
o
= 1.8V — 79 — %
V
o
= 1.5V — 77 — %
Switching Frequency ƒ
o
4.5V ≤ V
in
≤ 5.5V
650 700 750 kHz
0.1A ≤ I
o
≤ 15A
Absolute Maximum T
a
—0—+85°C
Operating Temperature Range
Recommended Operating T
a
Forced Air Flow = 200 LFM
0 — +65**** °C
Temperature Range Over V
in and Io
Ranges
Storage Temperature T
s
— -40 — +125 °C
Mechanical Shock Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture — 500 — G’s
Mechanical Vibration Per Mil-STD-883D, Method 2007.2,
—10—G’s
20-2000 Hz, Soldered in a PC board
Weight — Vertical/Horizontal — 31/41 — grams
* ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
**The PT7707 series can be easily paralleled with one or more of the PT7749 Current Boosters to provide increased output current in increments of 18A.
*** The minimum input voltage is 4.5V or V
out
+1.2V, whichever is greater. ****See SOA curves.
Output Capacitors:
The PT7707 series requires a minimum ouput capacitance of 330µF for proper operation. Do not use Oscon type capacitors. The maximum allow-
able output capacitance is 15,000µF.
Input Filter:
An input filter is optional for most applications. The input inductor must be sized to handle 18ADC with a typical value of 1µH. The input capacitance must be
rated for a minimum of 1.3Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required.
Revised 7/24/98
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
PT7705
7 - 11
13 - 19
20 - 25
27
V
IN
GND
1µH
GND
V
OUT
C
OUT
+
C
IN
+
12
261
L1
SYNC OUT
LOAD
REMOTE SENSE (+)
REMOTE SENSE (-)
VID1
VID2
VID3
VID4
PROGRAMMING PINS
234
STBY*
5
6
VID0
PT7707
18 AMP “BIG-HAMMER” PROGRAMMABLE
INTEGRATED SWITCHING REGULATOR
Series
Programming Information
VID4=1 VID4=0
VID3 VID2 VID1 VID0 Vout Vout
1 1 1 1 2.0V 1.30V
1 1 1 0 2.1V 1.35V
1 1 0 1 2.2V 1.40V
1 1 0 0 2.3V 1.45V
1 0 1 1 2.4V 1.50V
1 0 1 0 2.5V 1.55V
1 0 0 1 2.6V 1.60V
1 0 0 0 2.7V 1.65V
0 1 1 1 2.8V 1.70V
0 1 1 0 2.9V 1.75V
0 1 0 1 3.0V 1.80V
0 1 0 0 3.1V 1.85V
0 0 1 1 3.2V 1.90V
0 0 1 0 3.3V 1.95V
0 0 0 1 3.4V 2.00V
0 0 0 0 3.5V 2.05V
• Single-Device: +5V input
• 5-bit Programmable:
1.3V to 3.5V@18A
• High Efficiency
• Input Voltage Range:
4.5V to 5.5V
• Differential Remote Sense
• 27-pin SIP Package
• Parallelable with PT7749
18A “Current Boosters”
Features
For assistance or to order, call (800) 531-5782
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http:/www.powertrends.com
PT7707, Vo = 3.3 VDC (See Note 1)
Efficiency vs Output Current
Ripple vs Output Current
Power Dissipation vs Output Current
Efficiency - %Ripple-(mV)PD-(Watts)
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Note 1:Note 1:
Note 1:Note 1:
Note 1: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Safe Operating Area Curves (@Vin=+5V)
Ambient Temperature (°C)
Output Current (Amps)
Airflow
Airflow
Ambient Temperature (°C)
Output Current (Amps)
PKG SUFFIX N
Note 2:Note 2:
Note 2:Note 2:
Note 2: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
Recommended Maximum
Operating Temperature
0
10
20
30
40
50
60
0 3 6 9 121518
5.5V
5.0V
4.5V
Vin
40
50
60
70
80
90
100
0 3 6 9 12 15 18
4.5V
5.0V
5.5V
Vin
0
2
4
6
8
10
12
14
0 3 6 9 12 15 18
5.5V
5.0V
4.5V
Vin
Series
Ordering Information
PT7707
❏❏
❏❏
❏ = 1.3 to 3.5 Volts
(For dimensions and PC board layout,
see Package Styles 800 and 810.)
Recommended Maximum
Operating Temperature
PT7707, Vo = 3.3 VDC (See Note 1)
PKG SUFFIX A, C
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
20
30
40
50
60
70
80
90
024681012141618
Nat Conv
60LFM
100LFM
200LFM
20
30
40
50
60
70
80
90
024681012141618
Nat Conv
60LFM
100LFM
200LFM
Logic 0 = Pin 12 potential (remote sense gnd)
Logic 1 = Open circuit (no pull-up resistors)
VID3 and VID4 may not be changed while the unit is operating.
CHARACTERISTIC DATA
PT7707
Loading...