PT7701 Datasheet, PDF (1/2 Pages) Texas Instruments – 15 AMP HIGH-PERFORMANCE BIG HAMMER PROGRAMMABLE ISR

For assistance or to order, call [phone]
PT7700 Series
15 AMP HIGH-PERFORMANCE
“BIG HAMMER” PROGRAMMABLE ISR
SLTS077
Revised 5/31/00
The PT7700 is a new series of high-
performance, 15 Amp Integrated Switching
Regulators (ISRs) housed in a 27-pin SIP
package. The 15A capability allows easy
integration of the latest high-speed, low-
voltage µPs and bus drivers into existing 5V
systems.
The PT7700 series has been designed to
work in parallel with one or more of the
PT7749 - 15A current boosters for
increased Iout in increments of 15A.
Two products are offered in the series
with different output voltage ranges that are
easily programmed with a 4 bit input
compatible with Intel’s Pentium^ Pro
Processor. A differential remote sense is
also provided which automatically
compensates for any voltage drop from the
ISR to the load.
An input filter and 1200µF of output
capacitance are required for proper
operation.
Features
• Single-Device: +5V input
• 4-bit Programmable:
2V to 3.5V@15A or
1.3V to 2V @ 15A output
• High Efficiency
• Input Voltage Range:
4.5V to 5.5V
• Differential Remote Sense
• 27-pin SIP Package:
V = 1.0”(H) x 3”(L) x 0.55”(W)
H = 0.55”(H) x 3”(L) x 1.5”(W)
• Parallelable with PT7749
15A “Current Boosters”
Specifications
Standard Application
PROGRAMMING PINS
VID0
VID1
VID2
VID3
V_IN
L1
1µH
4321
Cin = Required 330µF electrolytic (x4)
Cout = Required 330µF electrolytic (x4)
L1 = Required 1µH input choke
REMOTE SENSE (+)
26
PT7700 ^{7 - 11}
20 - 25
V_OUT
++++
C_IN
SYNC OUT
GND
STBY*
27 13 - 19 5 12
++++
C_OUT
LOAD
GND
REMOTE SENSE (-)
Pin-Out Information
Pin Function
Pin Function
Pin
1
VID0
2
VID1
3
VID2
10 Vin
19
11 Vin
20
12 Remote Sense Gnd
21
4
VID3
13 GND
22
5
STBY* - Stand-by
14 GND
23
6
Vin
7
Vin
8
Vin
9
Vin
15 GND
24
16 GND
25
17 GND
26
18 GND
27
For STBY* pin; open = output enabled; ground = output disabled.
Function
GND
Vout
Vout
Vout
Vout
Vout
Vout
Remote Sense Vout
Sync Out
Ordering Information
PT7701❏ = 2 to 3.5 Volts
PT7702❏ = 1.3 to 2 Volts
N = Vertical through-hole
A = Horizontal through-hole
C = Horizontal surface-mount
Programming Information
VID3 VID2 VID1 VID0
PT7701 PT7702
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
Note: Logic 0 = Pin 12 (remote sense gnd) potential
Logic 1 = Open circuit (no pull-up resistors)
Characteristics
(T_A = 25°C unless noted)
Output Current
Input Voltage Range
Static Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise pk-pk
Transient Response
with Cout = 1200µF
Efficiency
Switching Frequency
Operating Temperature
Storage Temperature
Weight
Symbols
Io
Vin
V_o
Reg_line
Regload
Vn
t_tr
Vos
η
ƒ_o
T_a
Ts
—
Conditions
4.5V ≤ Vin ≤ 5.5V
0.1A ≤ Io ≤ 15A
Vin = +5V, Io = 15A
0°C ≤ Ta ≤ +55°C
4.5V ≤ V_in ≤ 5.5V, I_o = 15A
Vin = +5V, 0.1 ≤ Io ≤ 15A
Vin = +5V, Io = 15A
Io step between 7.5A and 15A
Vo over/undershoot
Vin = +5V, Io = 10A
4.5V ≤ Vin ≤ 5.5V
0.1A ≤ Io ≤ 15A
Forced Air Flow = 200 LFM
Over Vin and Io Ranges
—
—
Vo = 3.3V
Vo = 2.9V
Vo = 2.5V
Vo = 1.8V
Vo = 1.5V
PT7700 SERIES
Min
Typ
0.1 ⁽¹⁾
—
4.5 ⁽³⁾
—
Vo- 0.05 —
—
±10
—
±10
—
50
—
100
—
200
—
89
—
87
—
85
—
79
—
77
650
700
0
—
-40
—
—
TBD
Max
15 ⁽²⁾
5.5
Vo+0.05
—
—
—
—
—
—
—
—
—
—
750
Units
ADC
VDC
VDC
mV
mV
mV
µSec
mV
%
%
%
%
%
kHz
+55
+125
—
°C
°C
grams
Relative Humidity
—
Non-condensing
0
—
95
%
(1) ISR will operate down to no load with reduced specifications Please note that this product is not short-circuit protected.
(2) The PT7700 series can be easily paralleled with one or more of the PT7749 slave modules to provide increased output current in increments of 15A.
Please contact Power Trends for the appropriate application note.
(3) The minimum input voltage is 4.5V or V_out+1.2V, whichever is greater.
Output Capacitors: The PT7700 series requires A minimum output capacitance of 1200µF for proper operation. To reduce ESR, Power Trends recommends using four 330µF
electrolytic capacitors in parallel.
Input Filter: An input filter is required for all applications. The input inductor must be sized to handle 15ADC with a typical value of 1µH. The input capacitance must be rated
for 14Arms of ripple current. Power Trends recommends using four Sanyo OSCON style capacitors with a 3.5Arms ripple current rating in parallel (p/n 6SA330M).
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 USA [phone] Fax: [phone] http://www.ti.com/powertrends