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参数资料
| 型号： | PT7705C |
| 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 SURFACE MOUNT PACKAGE-27 |
| 文件页数： | 1/6页 |
| 文件大小： | 251K |
| 代理商： | PT7705C |
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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
VID4
7Vin
8Vin
9Vin
Pin Function
10
Vin
11
Vin
12
Remote Sense Gnd
13
GND
14
GND
15
GND
16
GND
17
GND
PT7705—5V
The PT7705 is a series of high-
performance, 18 Amp Integrated
Switching Regulators (ISRs) housed in
a 27-pin SIP package. The 18A capa-
bility allows easy integration of the
latest high-speed, low-voltage Ps and
bus drivers into existing 5V systems.
The PT7705 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 PT7705
can be easily programmed from 1.3V
to 3.5V with a 5 bit input compatible
with Intel’s Pentium II Processor.
A differential remote sense is also
provided which automatically com-
pensates for any voltage drop from the
ISR to the load.
1200F of output capacitance are
required for proper operation.
Cin = Required 1200F electrolytic
Cout= Required 1200F electrolytic
L1 = Optional 1H input choke
PT7705
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
18 Amp “Big-Hammer” Programmable
Integrated Switching Regulator
Pin Function
18
GND
19
GND
20
Vout
21
Vout
22
Vout
23
Vout
24
Vout
25
Vout
26
Remote Sense Vout
27
Sync Out
SLTS045A
(Revised 6/30/2000)
Specifications
Characteristics
PT7705 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)
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
—
Vo = 2.5V
—
85
—
%
Vo = 1.8V
—
79
—
Vo = 1.5V
—
77
—
Switching Frequency
o
4.5V
≤ Vin ≤ 5.5V
650
700
750
kHz
0.1A
≤ Io ≤ 15A
Absolute Maximum
Ta
Over Vin Range
0
—
+85 (4)
°C
Operating Temperature Range
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 PT7705 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 or consult the factory for the appripriate derating.
Output Capacitors: The PT7705 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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: |
| PT7705N1 | 功能描述:开关变换器、稳压器与控制器 1.3 to 3.5Vout 18Amp 5Vin Prgrmable 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 |
| PT7706 | 制造商:TI 制造商全称:Texas Instruments 功能描述:18 AMP “BIG-HAMMER” PROGRAMMABLE INTEGRATED SWITCHING REGULATOR |
| PT7706A | 功能描述:REGU 15A 1.3-2.05V 4BIT 3.3V IN RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT7700 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 |
| PT7706C | 功能描述:REGU 15A 1.3-2.05V 4BIT SMD RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT7700 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 |
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