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参数资料
| 型号： | PT7721A |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, SMA27 |
| 封装： | HORIZONTAL THROUGH HOLE, SIP-27 |
| 文件页数： | 1/3页 |
| 文件大小： | 203K |
| 代理商： | PT7721A |
PT7720
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
50
Pin-Out Information
Pin Function
1
VID0
2
VID1
3
VID2
4
VID3
5
STBY* - Stand-by
6
VID4
7Vin
8Vin
9Vin
10
Vin
11
Vin
12
Remote Sense Gnd
13
GND
14
GND
Pin Function
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
Standard Application
Cin = Required 560F electrolytic
(See input filter note)
Cout = Required 1200F electrolytic
L1
= Optional 1H input choke
For STBY* pin:
open = output enabled
ground = output disabled.
+12V bus input
5-bit Programmable:
1.3V to 3.5V or
4.5V to 7.6V
High Efficiency
Differential Remote Sense
27-pin SIP Package
Parallelable with PT7748
17A current boosters
Features
Series
17 AMP 12V INPUT “BIG-HAMMER II” PRO-
GRAMMABLE ISR
PT7720
The PT7720 series is a new +12V input,
17A output, high-performance Integrated
Switching Regulator (ISR) housed in a 27-
pin SIP package. The 17A capability allows
easy integration of the latest high-speed,
low-voltage Ps and bus drivers into +12V
distributed power systems.
The PT7720 series has been designed
to work in parallel with one or more of the
PT7748 current boosters for increased Iout
in increments of 17A.
The output voltage of the PT7721 can
be easily programmed from 1.3V to 3.5V
with a 5 bit input compatible with Intel’s
PentiumIIProcessor. A differential re-
mote sense is also provided which
automatically compensates for any voltage
drop from the ISR to the load.
1200F of output capacitance is re-
quired for proper operation.
Output Capacitors:
The PT7720 series requires a minimum output capacitance of 1200F for proper operation. Do not use Oscon type capacitors. The maximum allowable output capacitance
Is (57,000 ÷ Vout)F, or 15,000F, whichever is less.
Input Filter:
An input inductor is optional for most applications. The input inductor must be sized to handle 7ADC with a typical value of 1H. The input capacitance must be rated for a
minimum of 4.0 Arms of ripple current when operated at maximum output current and maximum output voltage. Contact an applications engineer for input capacitor selection for applications
at other output voltages and output currents.
Specifications
Characteristics
PT7720 SERIES
(T
a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta = +60°C, 200 LFM, pkg N, Vo ≤ 5V
0.1*
—17**
A
Ta = +25°C, natural convection, Vo ≤ 5V
0.1*
—17**
A
Output Power
Po
Ta = +60°C, 200 LFM, pkg N, Vo ≥ 5V
—
85
Watts
Ta = +25°C, natural convection, Vo ≥ 5V
—
85
Watts
Input Voltage Range
Vin
0.1A
≤ Io ≤ 17A
11.0
—
14.0
V
Output Voltage Tolerance
Vo
Vin = +12V, Io = 17A
(PT7721)
Vo-0.03
—
Vo+0.03
V
0°C
≤ Ta ≤ +60°C
(PT7722)
—
±1.0%
±2.0%
% Vo
Line Regulation
Regline
11V
≤ Vin ≤ 14V, Io = 17A (Using remote sense)
—
±5
±10
mV
Load Regulation
Regload
Vin = +12V, 0.1 ≤ Io ≤ 17A (Using remote sense)
—
±5
±10
mV
Vo Ripple/Noise
Vn
Vin = +12V, Io = 17A
(PT7721)
—
50
—
mVpp
(PT7722)
—
100
—
mVpp
Transient Response
ttr
Io step between 7.5A and 15A
—
100
—
Sec
with Cout = 1200F
Vos
Vo over/undershoot
—
200
—
mV
Efficiency
η
Vin = +12V, Io = 10A
Vo = 5.0V
—
90
—
%
Vo = 3.3V
—
88
—
%
Vo = 2.5V
—
85
—
%
Vo = 1.5V
—
78
—
%
Switching Frequency
o
11V
≤ Vin ≤ 14V
300
350
400
kHz
0.1A
≤ Io ≤ 17A
Absolute Maximum
Ta
—0
—
+85
°C
Operating Temperature Range
Recommended Operating
Ta
Forced Air Flow = 200 LFM
0—
+65***
°C
Temperature Range
At Vin = 12V, Io = 12A
Storage Temperature
Ts
—
-40
—
+125
°C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3 , 1 msec,
—
TBD
—
G’s
Half Sine, mounted to a fixture
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
—
TBD
—
G’s
Weight
—
Vertical/Horizontal
—
51/64
—
grams
*
ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
** The PT7720 series can be easily paralleled with one or more of the PT7748 Current Boosters to provide increased output current in increments of 17A.
*** See Safe Operating Area chart.
Revised 1/13/99
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PT7721C | 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 |
| PT7721N | 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 |
| PT7722 | 制造商:TI 制造商全称:Texas Instruments 功能描述:17 AMP 12V INPUT “BIG-HAMMER II” PROGRAMMABLE ISR |
| PT7722A | 功能描述:开关变换器、稳压器与控制器 4.5-7.6Vout 17Amp 12 Vin 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 |
| PT7722C | 制造商:POWERTRENDS 功能描述: |
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