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参数资料
| 型号： | PT7775N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 32 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA27 |
| 封装： | VERTICAL THROUGH HOLE, SIP-27 |
| 文件页数： | 1/5页 |
| 文件大小： | 263K |
| 代理商： | PT7775N |
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
C
IN
+
C
OUT
+
LOAD
V
IN
VID0
VID1
VID2
VID3
VID4
V
OUT
GND
SYNC OUT
STBY*
L1
1uH
REMOTE SENSE (–)
REMOTE SENSE (+)
PROGRAMMING PINS
PT7775
64
32
1
26
20-25
12
5
13-19
27
7-11
Vo
Vin
GND
SNS ( + )
SNS(-)
Synch
Out
STBY
VID4 - VID0
Standard Application
Cin = Required 2400F electrolytic
Cout = Required 330F electrolytic
L1
= Optional 1H input choke
Description
The PT7775 is a high-output, 32A
Integrated Switching Regulator (ISR),
housed in a 27-pin SIP package. The
PT7775 is a low voltage version of
the PT7779, a next generation
“Sledge Hammer” ISR. These regu-
lators include short circuit protection
and require only 330F of output
capacitance.
The low-output voltage and 32A
load capability makes the PT7775 an
ideal source for powering the industry’s
latest high-speed, low-voltage Ps,
ASICs, and DSPs from an existing
5V source. The output voltage is
programmable from 0.8V to 3.1V, via
a 5-bit input.
The PT7775 will operate with
up to two PT7741 32A current
boosters. A differential remote sense
provides compensation for voltage
drop between the ISR and load.
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
7 Vin
8 Vin
9 Vin
10 Vin
11 Vin
12 Remote Sense Gnd (3)
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
PT7775—5V
32 Amp 0.8V to 3.1V Programmable
Integrated Switching Regulator
SLTS114
(Revised 8/31/2000)
Specifications
Characteristics
PT7775
(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)
—31
Input Voltage Range
Vin
0.1A
≤ Io ≤ 32A
4.5
—
5.5
V
Output Voltage Tolerance
Vo
Vin = +5V, Io = 32A
Vo-0.03
—
Vo+0.03
V
–40°C
≤ Ta ≤ +85°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 = 330F
Vos
Vo over/undershoot
—
200
—
mV
Efficiency
η
Vin = +5V, Io = 20A, Vo = 3.3V
—
90
—
%
Switching Frequency
o
4.5V
≤ Vin ≤ 5.5V
300
350
400
kHz
0.1A
≤ Io ≤ 32A
Absolute Maximum
Ta
Over Vin Range
–40
—
+85 (2)
°C
Operating Temperature Range
Storage Temperature
Ts
—
-40
—
+125
°C
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
—
10/15
—
G’s
20-20,000Hz, Soldered in a PC board
Weight
—
Vertical/Horizontal
—
53/66
—
grams
Notes:
(1) ISR-will operate down to no load with reduced specifications.
(2) See SOA curves or consult 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 PT7775 requires a minimum output capacitance of 330F (ESR
≤0.1) for proper operation. The PT7775 also requires an input capaci-
tance of 2400F, which must be rated for a minimum of 2.0Arms ripple current. For transient or dynamic load applications, additional capacitance may be required. For
further information, see the accompanying capacitor application note for this product.
Input Filter: An input filter choke is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1H.
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| PT7775A | 32 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA27 |
| PT7775C | 32 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA27 |
| PT7779N | 32 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA27 |
| PT7779C | 32 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA27 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PT7777 | 制造商:TI 制造商全称:Texas Instruments 功能描述:32 AMP HIGH-PERFORMANCE “SLEDGE HAMMER” PROGRAMMABLE ISR |
| PT7777A | 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 |
| PT7777C | 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 |
| PT7777N | 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: |
| 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 |
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