PT7740A [TI]
32 Amp âCurrent Boosterâ for PT7778 Regulator;
| 型号： | PT7740A |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 32 Amp âCurrent Boosterâ for PT7778 Regulator |
| 文件： | 总2页 (文件大小：146K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PT7740—3.3V
32 Amp “Current Booster” for
PT7778 Regulator
SLTS117
(Revised 8/31/2000)
Description
The booster adds a parallel output
stage that is driven directly by the
regulator. Both operate in perfect
sychronization for a low noise solution.
The PT7740 only operates with a
PT7778 regulator and is not a stand-
alone product. Please refer to the
PT7778 data sheet for the perfor-
mance specifications. The current
booster has the same package options
as its companion regulator.
The PT7740 is a high-output 32
Amp “Current Booster” designed to
operate with the PT7778 regulator.
Up to two PT7740 boosters will
operate in parallel with a PT7778,
boosting output current in increments
of 32A. Combinations of a PT7778
series regulator and PT7740 current
boosters can supply enough power for
virtually any multiple mega-processor
application.
Pin-Out Information
Ordering Information
PT7740❏
Pin Function
14 GND
15 GND
16 GND
17 GND
18 GND
19 GND
20 Vout
Pin Function
Features
(For dimensions and PC Board layout,
1
2
3
4
5
6
7
8
9
Do not connect
• 32A Current Boost
• Tracks Vo of a PT7778
• High Efficiency
• Input Voltage Range:
3.1V to 3.6V
• Synchronized with PT7778
• 27-pin SIP Package
• Run up to 2 in Parallel (96A)
see Package Styles 1020 and 1030.)
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Vin
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
21 Vout
Vin
22 Vout
Vin
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
N
A
C
10 Vin
23 Vout
24 Vout
11 Vin
25 Vout
12 Do not connect
13 GND
26 Do not connect
27 Master Sync In
Standard Application
P R O G R A M M I N G P I N S
REMOTE SENSE (+)
VID0
VID1
VID2
VID3
4
VID3
3
-
2
VID0
1
26
SNS(+)
VOUT
L 1
7-11 Vin
20-25
Vo
VIN
PT7778
1 µH
Synch
Out
STBY
5
GND
SNS(-)
+
+
LOAD
27
13-19
12
CIN
COUT
G N D
G N D
STBY*
REMOTE SENSE (–)
27
Synch
In
L 1
7-11 Vin
20-25
Vo
PT7740
1 µH
GND
+
+
13-19
CIN
COUT
External Capacitors: When used with a PT7778, the PT7740 requires a minimum ouput capacitance of 330µF. The maximum allowable output capacitance is
30,000µF. The PT7740 also requires a minimum input capacitance of 2400µF, which must be rated for a minimum of 2.0Arms of ripple current. For transient
or dynamic load applications, additional capacitance may be required. For further information, see the accompanying application note on capacitor selection for this
product.
Input Filter: An input filter inductor is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1µH.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Applications
Audio
Automotive
Broadband
Digital Control
Medical
Amplifiers
Data Converters
DSP
Clocks and Timers
Interface
amplifier.ti.com
dataconverter.ti.com
dsp.ti.com
www.ti.com/clocks
interface.ti.com
logic.ti.com
www.ti.com/audio
www.ti.com/automotive
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/medical
www.ti.com/military
Logic
Military
Power Mgmt
Microcontrollers
RFID
power.ti.com
microcontroller.ti.com
www.ti-rfid.com
Optical Networking
Security
Telephony
Video & Imaging
Wireless
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
RF/IF and ZigBee® Solutions www.ti.com/lprf
www.ti.com/wireless
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2008, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明