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参数资料
型号： PT7704A
厂商： TEXAS INSTRUMENTS INC
元件分类： 稳压器
英文描述： 18 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, SMA27
封装： HORIZONTAL THROUGH HOLE, SIP-27
文件页数： 1/3页
文件大小： 116K
代理商： PT7704A
Standard Application
For STBY* pin; open = output enabled; ground = output disabled.
Pin-Out Information
Pin Function
1
VID0
2
VID1
3
VID2
4
VID3
5
STBY* - Stand-by
6
Do not connect
7Vin
8Vin
9Vin
Pin Function
10
Vin
11
Vin
12
Remote Sense Gnd
13
GND
14
GND
15
GND
16
GND
17
GND
18
GND
Series
PT7704
The PT7704 is an 18 Amp high-
performance, Integrated Switching
Regulator (ISR) housed in a 27-pin
SIP package. The 18A capability
allows easy integration of the latest
high-speed, low-voltage Ps and bus
drivers into existing 5V systems.
The PT7704 series has been de-
signed to work in parallel with one or
more of the PT7749 - 18A current
boosters for increased Iout in incre-
ments of 18A.
The output voltage of the PT7704
programmable from 2.9V to 3.65V
via 4 control inputs. These inputs
are selectively grounded by the user
to set the desired output voltage.
A differential remote sense is also
provided, which can automatically
compensate for voltage drop between
the ISR to the load.
1200F of output capacitance are
required for proper operation.
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.ti.com/powertrends
Cin = Required 1200F electrolytic
Cout= Required 1200F electrolytic
L1 = Optional 1H input choke
PT7704
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
PROGRAMMING PINS
2
3
4
STBY*
5
VID0
18 AMP “BIG-HAMMER” PROGRAMMABLE
INTEGRATED SWITCHING REGULATOR
Pin Function
19
GND
20
Vout
21
Vout
22
Vout
23
Vout
24
Vout
25
Vout
26
Remote Sense Vout
27
Sync Out
Specifications
Characteristics
PT7704 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)
—18 (2)
A
Ta = +25°C, natural convection
0.1 (1)
—15 (2)
A
Input Voltage Range
Vin
0.1A
≤ Io ≤ 15A
4.5 (3)
—
5.5
V
Output Voltage Tolerance
Vo
Vin = +5V, Io = 15A
Vo-0.03
—
Vo+0.03
V
0°C
≤ Ta ≤ +65°C
Line Regulation
Regline
4.5V
≤ Vin ≤ 5.5V, Io = 15A
—
±10
—
mV
Load Regulation
Regload
Vin = +5V, 0.1 ≤ Io ≤ 15A
—
±10
—
mV
Vo Ripple/Noise
Vn
Vin = +5V, Io = 15A
—
50
—
mV
Transient Response
ttr
Io step between 7.5A and 15A
—
100
—
Sec
with Cout = 1200F
Vos
Vo over/undershoot
—
200
—
mV
Efficiency
η
Vin = +5V, Io = 10A
Vo = 3.3V
—
89
—
%
Vo = 2.9V
—
87
—
%
Switching Frequency
o
4.5V
≤ Vin ≤ 5.5V
650
700
750
kHz
0.1A
≤ Io ≤ 15A
Absolute Maximum
Ta
—0
—
+85
°C
Operating Temperature Range
Recommended Operating
Ta
Forced Air Flow = 200 LFM
0
—
+65
(4)
°C
Temperature Range
Over Vin and Io Ranges
Storage Temperature
Ts
—
-40
—
+125
°C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
—
500
—
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
—
10
—
G’s
20-2000 Hz, Soldered in a PC board
Weight
—
Vertical/Horizontal
—
31/41
—
grams
Notes:
(1) ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
(2) The PT7704 series can be easily paralleled with one or more of the PT7749 Current Boosters to provide increased output current in increments of 18A.
(3) The minimum input voltage is 4.5V or Vout+1.2V, whichever is greater.
(4) See SOA curves.
Output Capacitors: The PT7704 series requires a minimum ouput capacitance of 1200F for proper operation. Do not use Oscon type capacitors. The maximum
allowable output capacitance is 15,000F. See Capacitor Application Note.
Input Filter: An input filter is optional for most applications. The input inductor must be sized to handle 15ADC with a typical value of 1H. The input capacitance must
be rated for a minimum of 1.3Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required.
SLTS126
(Revised 2/26/1998)
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PT7705A SWITCHING REGULATOR, PSIP27
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相关代理商/技术参数
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PT7705N 功能描述:DC/DC转换器 PROGRAMMABLE ISR RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
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