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TPS2047B

更新时间： 2024-09-21 11:07:55
品牌 Logo 应用领域
德州仪器 - TI 开关电源开关
页数 文件大小 规格书
29页 881K
描述
低电平有效的 3 通道、0.25A 负载、2.7-5.5V、70mΩ USB 电源开关

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TPS2047B 数据手册

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TPS2045B, TPS2055B  
DBV-5  
D-8  
D-16  
TPS2046B, TPS2047B  
www.ti.com  
SLVS532C–JULY 2004–REVISED OCTOBER 2007  
CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES  
1
FEATURES  
APPLICATIONS  
•
Heavy Capacitive Loads  
•
70-mΩ High-Side MOSFET  
•
Short-Circuit Protections  
•
•
•
•
•
•
•
•
•
250-mA Continuous Current  
Thermal and Short-Circuit Protection  
Accurate Current Limit (0.3 A min, 0.7 A max)  
Operating Range: 2.7 V to 5.5 V  
0.6-ms Typical Rise Time  
TPS2047B  
D PACKAGE  
(TOP VIEW)  
TPS2045B/TPS2055B  
DBV PACKAGE  
(TOP VIEW)  
TPS2046B  
D PACKAGE  
(TOP VIEW)  
OUT  
IN  
GND  
IN  
GND  
IN1  
OC1  
OC1  
OUT1  
OUT2  
OUT1  
OUT2  
OC2  
GND  
OC  
EN1  
EN2  
EN1  
EN2  
GND  
EN †  
OC2  
Undervoltage Lockout  
OC3  
Deglitched Fault Report (OC)  
No OC Glitch During Power Up  
TPS2045B/TPS2055B  
D PACKAGE  
(TOP VIEW)  
IN2  
OUT3  
NC  
NC  
EN3  
NC  
GND  
IN  
OUT  
OUT  
OUT  
Maximum Standby Supply Current:  
1-μA (Single and Dual) or 2-μA (Triple)  
NC - No Connection  
IN  
EN †  
OC  
•
•
•
•
Bidirectional Switch  
†All enable inputs are active high (EN) for the TPS2055B.  
Ambient Temperature Range: –40°C to 85°C  
ESD Protection  
UL Pending  
DESCRIPTION  
The TPS204xB/TPS2055B power-distribution switches are intended for applications where heavy capacitive  
loads and short circuits are likely to be encountered. These devices incorporate 70-mΩ N-channel MOSFET  
power switches for power-distribution systems that require multiple power switches in a single package. Each  
switch is controlled by a logic-enable input. Gate drive is provided by an internal charge pump designed to  
control the power-switch rise times and fall times to minimize current surges during switching. The charge pump  
requires no external components and allows operation from supplies as low as 2.7 V.  
When the output load exceeds the current-limit threshold or a short is present, the device limits the output current  
to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When  
continuous heavy overloads and short-circuits increase the power dissipation in the switch, causing the junction  
temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal  
shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains  
off until valid input voltage is present. This power-distribution switch is designed to set current limit at 0.5 A  
typically.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
UNLESS OTHERWISE NOTED this document contains  
Copyright © 2004–2007, Texas Instruments Incorporated  
PRODUCTION DATA information current as of publication date.  
Products conform to specifications per the terms of Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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