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PT7771

更新时间： 2024-01-17 10:44:52
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德州仪器 - TI /
页数 文件大小 规格书
3页 182K
描述
32 AMP HIGH-PERFORMANCE “SLEDGE HAMMER” PROGRAMMABLE ISR

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PT7771 技术参数

生命周期：TransferredReach Compliance Code：unknown
风险等级：5.73模拟集成电路 - 其他类型：SWITCHING REGULATOR
JESD-30 代码：R-PSIP-T27端子数量：27
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：IN-LINE认证状态：Not Qualified
表面贴装：NO端子形式：THROUGH-HOLE
端子位置：SINGLEBase Number Matches：1

PT7771 数据手册

 浏览型号PT7771的Datasheet PDF文件第2页浏览型号PT7771的Datasheet PDF文件第3页 
Application Notes  
Mechanical Outline  
For assistance or to order, call (800) 531-5782  
Product Selector Guide  
S e r i e s  
P T 7 7 7 0  
32 AMP HIGH-PERFORMANCE  
“SLEDGE HAMMER” PROGRAMMABLE ISR  
Revised 5/15/98  
The PT7770 is a new series of  
from 1.3V to 3.5V with a 5 bit input  
high-performance, 32 Amp Inte-  
grated Switching Regulators (ISRs)  
housed in a 27-pin SIP package.  
The 32A capability allows easy  
integration of the latest high-speed,  
low-voltage µPs, ASICs, DSPs, and  
bus drivers into existing 5V systems.  
The output voltage of the  
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.  
2400µF of output capacitance  
are required for proper operation.  
PT7770 can be easily programmed  
Pin-Out Information  
Pin Function  
Pin Function  
14 GND  
15 GND  
16 GND  
17 GND  
Standard Application  
PROGRAMMING PINS  
1
2
3
4
5
6
7
8
VID0  
VID1  
VID0  
VID1  
VID2  
VID3  
VID4  
VID2  
REMOTE SENSE (+)  
VID3  
6
4
3
2
1
26  
STBY*- Stand-by  
18 GND  
19 GND  
L1  
VID4  
Vin  
VIN  
VOUT  
7 - 11  
20 - 25  
PT7770  
1µH  
20  
21  
22  
23  
24  
25  
V
V
V
V
V
V
out  
out  
out  
out  
out  
out  
Vin  
27  
13 - 19  
5
12  
+
+
9
Vin  
CIN  
COUT  
LOAD  
10 Vin  
11 Vin  
12 Remote Sense Gnd  
13 GND  
SYNC OUT  
GND  
GND  
STBY*  
26 Remote Sense V  
27 Sync Out  
REMOTE SENSE (-)  
out  
C
C
L1  
=
=
=
Required 2400µF electrolytic  
Required 2400µF electrolytic  
Optional 1µH input choke  
in  
out  
For STBY* pin; open = output enabled;  
ground = output disabled.  
Specifications  
PT7770 SERIES  
Characteristics  
(T a = 25°C unless noted)  
Symbols  
Conditions  
Min  
Typ  
Max  
Units  
(1)  
Output Current  
Io  
Ta = +60°C, 200 LFM, pkg N  
Ta = +25°C, natural convection  
0.1  
0.1  
—
—
32  
26  
A
A
(1)  
(2)  
Input Voltage Range  
Vin  
0.1A ≤ Io ≤ 32A  
4.5  
—
5.5  
V
Output Voltage Tolerance  
∆Vo  
Vin = +5V, Io = 32A  
0°C ≤ Ta ≤ +55°C  
Vo-0.03  
—
Vo+0.03  
V
Line Regulation  
Regline  
Regload  
Vn  
4.5V ≤ Vin ≤ 5.5V, Io = 32A  
Vin = +5V, 0.1 ≤ Io ≤ 32A  
Vin = +5V, Io = 32A  
—
—
—
±10  
±10  
50  
—
—
—
mV  
mV  
mV  
Load Regulation  
Vo Ripple/Noise pk-pk  
Transient Response  
with Cout = 2400µF  
ttr  
Vos  
Io step between 16A and 32A  
Vo over/undershoot  
—
—
100  
200  
—
—
µSec  
mV  
Efficiency  
η
Vin = +5V, Io = 20A, Vo = 3.3V  
—
90  
—
%
Switching Frequency  
ƒo  
4.5V ≤ Vin ≤ 5.5V  
0.1A ≤ Io ≤ 32A  
650  
700  
750  
kHz  
Absolute Maximum  
Ta  
—
0
0
—
—
+85  
+65  
°C  
°C  
Operating Temperature Range  
Recommended Operating  
Temperature Range  
Ta  
Forced Air Flow = 200 LFM  
Over Vin  
—
Io Ranges  
and  
Storage Temperature  
Weight  
Ts  
—
-40  
—
—
+125  
—
°C  
Vertical/Horizontal  
53/66  
grams  
(1) ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.  
(2) The minimum input voltage is 4.5V or Vout+1.2V, whichever is greater.  
Output Capacitors: The PT7770 series requires a minimum output capacitance of 2400µF for proper operation. Do not use Oscon type capacitors.  
The maximum allowable output capacitance is 30,000µF.  
Input Filter: An input filter is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1µH.  
The input capacitance must be rated for a minimum of 2.6Arms of ripple current. For transient or dynamic load applications, additional  
capacitance may be required.  
2
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com  
123

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