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PT7778N

更新时间： 2024-01-01 18:52:07
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其他 - ETC 模拟IC开关
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3页 156K
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Analog IC

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PT7778N 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：MODULE包装说明：SIP-27
针数：27Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.85Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
最大输入电压：3.6 V最小输入电压：3.1 V
标称输入电压：3.3 VJESD-30 代码：R-XSMA-T27
湿度敏感等级：1功能数量：1
端子数量：27最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：32 A
封装主体材料：UNSPECIFIED封装等效代码：SIP27
封装形状：RECTANGULAR封装形式：MICROELECTRONIC ASSEMBLY
峰值回流温度（摄氏度）：215认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：NO
切换器配置：BUCK最大切换频率：400 kHz
技术：HYBRID温度等级：INDUSTRIAL
端子形式：THROUGH-HOLE端子位置：SINGLE
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

PT7778N 数据手册

 浏览型号PT7778N的Datasheet PDF文件第2页浏览型号PT7778N的Datasheet PDF文件第3页 
PT7778—3.3V  
32 Amp Programmable Integrated  
Switching Regulator  
SLTS115  
(Revised 8/31/2000)  
Description  
ble with Intel’s Pentium II Processors.  
The 32A capability provides the  
ideal power source for the industry’s  
latest high-speed, low-voltage µPs,  
DSPs, and custom VLSI devices.  
For additional current, the PT7778  
may be paralleled with up to two  
PT7740 32A current boosters.  
A differential remote sense is  
The PT7778 is a high-output 32A  
Integrated Switching Regulator (ISR),  
housed in a 27-pin SIP package, The  
PT7778 is the 3.3V-input bus version  
of the PT7779. It includes short  
circuit protection and requires only  
330µF of output capacitance for  
proper operation.  
The output voltage of the PT7778  
is programmable from 1.3V to 2.05V  
using a 4-bit input, which is compati-  
provided to compensate for voltage  
drop between the ISR and load.  
Pin-Out Information  
Standard Application  
Pin Function  
15 GND  
16 GND  
Pin Function  
1
2
3
4
5
6
7
8
VID0  
PROGRAMMING PINS  
VID1  
REMOTE SENSE (+)  
VID0  
VID1  
VID2  
VID3  
17 GND  
VID2  
VID3  
18 GND  
19 GND  
4
VID3  
3
-
2
VID0  
1
26  
STBY*- Stand-by  
SNS(+)  
N/C  
Vin  
VOUT  
20  
21  
22  
23  
24  
25  
V
V
V
V
V
V
out  
out  
out  
out  
out  
out  
L1  
7-11  
20-25  
Vo  
Vin  
VIN  
PT7778  
1µH  
Vin  
Synch  
Out  
STBY  
5
GND  
SNS(-)  
+
+
9
Vin  
LOAD  
27  
13-19  
12  
C IN  
COUT  
SYNC OUT  
G N D  
10 Vin  
11 Vin  
12 Remote Sense Gnd (3)  
13 GND  
G N D  
REMOTE SENSE (–)  
26 Remote Sense V  
27 Sync Out  
out  
STBY*  
14 GND  
C
C
= Required 2400µF electrolytic  
Required 330µF electrolytic  
in  
out  
For STBY* pin; open = output enabled;  
ground = output disabled.  
=
L1 = Optional 1µH input choke  
Specifications  
PT7778  
Characteristics  
(T a = 25°C unless noted)  
Symbols  
Conditions  
Min  
Typ  
Max  
Units  
(1)  
(1)  
Output Current  
Io  
Ta = +60°C, 200 LFM, pkg N  
Ta = +25°C, natural convection  
0.1  
0.1  
—
—
32  
31  
A
V
V
Input Voltage Range  
Vin  
0.1A ≤ Io ≤ 32A  
3.1  
—
3.6  
Output Voltage Tolerance  
∆Vo  
Vin = +3.3V, Io = 32A  
Vo-0.03  
—
Vo+0.03  
–40°C ≤ Ta ≤ +85°C  
Line Regulation  
Regline  
Regload  
Vn  
3.1V ≤ Vin ≤ 3.6V, Io = 32A  
Vin = +3.3V, 0.1 ≤ Io ≤ 32A  
Vin = +3.3V, Io = 32A  
—
—
—
±10  
±10  
50  
—
—
—
mV  
mV  
mV  
Load Regulation  
Vo Ripple/Noise pk-pk  
Transient Response  
with Cout = 330µF  
ttr  
Io step between 16A and 32A  
Vo over/undershoot  
—
—
100  
200  
—
—
µSec  
mV  
Vos  
Efficiency  
η
Vin = +3.3V, Io = 20A, Vo = 1.8V  
—
90  
—
%
Switching Frequency  
ƒo  
3.1V ≤ Vin ≤ 3.6V  
0.1A ≤ Io ≤ 32A  
300  
350  
400  
kHz  
Absolute Maximum  
Ta  
Ts  
Over Vin Range  
–40  
-40  
—
—
+85 (2)  
+125  
—
°C  
Operating Temperature Range  
Storage Temperature  
Mechanical Vibration  
—
—
°C  
Per Mil-STD-883D, Method 2007.2  
20-20,000Hz, Soldered in a PC board  
10/15  
53/66  
G’s  
Weight  
—
Vertical/Horizontal  
—
—
grams  
Notes: (1) ISR-will operate down to no load with reduced specifications.  
(2) Consult the Safe Operating Area curves, or contact the factory for the appropriate derating.  
(3) If the remote sense ground is not used, pin 12 must be connected to pin13 for optimum output voltage accuracy.  
External Capacitors: The PT7778 requires a minimum output capacitance of 330µF for proper operation. The PT7778 also requires an input capacitance of 2400µF,  
which must be rated for a minimum of 2.0Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For further infor-  
mation, see the accompanying application note on capacitor selection for this product.  
Input Filter: An input filter inductor is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1µH.  
For technical support and more information, see inside back cover or visit www.ti.com/powertrends  
123

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