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参数资料
| 型号： | PT7777N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 32 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, SMA27 |
| 封装： | VERTICAL THROUGH HOLE, SIP-27 |
| 文件页数： | 1/4页 |
| 文件大小： | 196K |
| 代理商： | PT7777N |
Series
Standard Application
Cin = Required 2400F electrolytic
Cout = Required 680F electrolytic
L1
= Optional 1H input choke
32 AMP HIGH-PERFORMANCE
“SLEDGE HAMMER” PROGRAMMABLE ISR
PT7777
The PT7777 is a new series of
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 Ps, ASICs, DSPs, and
bus drivers into existing 5V systems.
The output voltage of the PT7777
can be easily programmed from 1.3V
to 3.5V with a 5 bit input compatible
with Intel’s PentiumPro Processor. A
differential remote sense is also pro-
vided which automatically compensates
for any voltage drop from the ISR
to the load.
680F of output capacitance
is required for proper operation.
For STBY* pin; open = output enabled;
ground = output disabled.
Pin-Out Information
PT7777
7 - 11
13 - 19
20 - 25
27
V
IN
GND
1H
GND
V
OUT
C
OUT
+
C
IN
+
12
26
1
L1
SYNC OUT
LOAD
REMOTE SENSE (+)
REMOTE SENSE (-)
VID1
VID2
VID3
VID4
PROGRAMMING PINS
2
3
4
STBY*
5
6
VID0
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
Pin
Function
1 VID0
2 VID1
3 VID2
4 VID3
5 STBY*- Stand-by
6 VID4
7 V
in
8 V
in
9 V
in
10 V
in
11 V
in
12 Remote Sense Gnd
13 GND
Pin
Function
14 GND
15 GND
16 GND
17 GND
18 GND
19 GND
20 Vout
21 Vout
22 Vout
23 Vout
24 Vout
25 Vout
26 Remote Sense Vout
27 Sync Out
Specifications
Characteristics
PT7777 SERIES
(T
a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta = +60°C, 200 LFM, pkg N
0.1(1)
—32
A
Ta = +25°C, natural convection
0.1(1)
—26
A
Input Voltage Range
Vin
0.1A
≤ Io ≤ 32A
4.5(2)
—
5.5
V
Output Voltage Tolerance
Vo
Vin = +5V, Io = 32A
Vo-0.03
—
Vo+0.03
V
0°C
≤ Ta ≤ +55°C
Line Regulation
Regline
4.5V
≤ Vin ≤ 5.5V, Io = 32A
—
±10
—
mV
Load Regulation
Regload
Vin = +5V, 0.1 ≤ Io ≤ 32A
—
±10
—
mV
Vo Ripple/Noise pk-pk
Vn
Vin = +5V, Io = 32A
—
50
—
mV
Transient Response
ttr
Io step between 16A and 32A
—
100
—
Sec
with Cout = 680F
Vos
Vo over/undershoot
—
200
—
mV
Efficiency
η
Vin = +5V, Io = 20A, Vo = 3.3V
—
90
—
%
Switching Frequency
o
4.5V
≤ Vin ≤ 5.5V
650
700
750
kHz
0.1A
≤ Io ≤ 32A
Absolute Maximum
Ta
—
0
—
+85
°C
Operating Temperature Range
Recommended Operating
Ta
Forced Air Flow = 200 LFM
0
—
+65
°C
Temperature Range
Over Vin and Io Ranges
Storage Temperature
Ts
—
-40
—
+125
°C
Weight
—
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 V
out+1.2V, whichever is greater.
Output Capacitors: The PT7777 series requires a minimum output capacitance of 680F for proper operation. Do not use Oscon type capacitors.
The maximum allowable output capacitance is 30,000F.
Input Filter: An input filter is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1H.
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.
Revised 7/31/98
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| PT7777A | 32 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, SMA27 |
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| PT7778 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1.3 to 2.05Vout 32Amp 3.3V-Input ＇Sledge Hammer＇ Programmable ISR |
| PT7778A | 功能描述:开关变换器、稳压器与控制器 PROGRAMMABLE ISR RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| PT7778C | 功能描述:REGULTR 1.3-2.05V 32A 3.3VIN SMD RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT7770 标准包装:10 系列:PT4570 类型:隔离 输出数:1 电压 - 输入（最小）:36V 电压 - 输入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:3.3A 电源（瓦） - 制造商系列:30W 电压 - 隔离:1.5kV（1500V） 特点:- 安装类型:表面贴装 封装/外壳:19-SIP SMD 模块 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包装:托盘 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:30W |
| PT7778N | 功能描述:REGULTR 1.3-2.05V 32A 3.3VIN VRT RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:PT7770 标准包装:10 系列:PT4570 类型:隔离 输出数:1 电压 - 输入（最小）:36V 电压 - 输入（最大）:75V Voltage - Output 1:9V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:3.3A 电源（瓦） - 制造商系列:30W 电压 - 隔离:1.5kV（1500V） 特点:- 安装类型:表面贴装 封装/外壳:19-SIP SMD 模块 尺寸/尺寸:3.00" L x 1.19" W x 0.50" H（76.2mm x 30.2mm x 12.7mm） 包装:托盘 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:30W |
| PT7779 | 制造商:TI 制造商全称:Texas Instruments 功能描述:32 Amp Programmable Integrated Switching Regulator |
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