- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385011 > TPS2157IDGQ (Texas Instruments, Inc.) 3.3-V LDO AND DUAL SWITCH FOR USB BUS-POWERED HUB POWER MANAGEMENT PDF資料下載
參數(shù)資料
| 型號： | TPS2157IDGQ |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 3.3-V LDO AND DUAL SWITCH FOR USB BUS-POWERED HUB POWER MANAGEMENT |
| 中文描述： | 3.3V的穩(wěn)壓器和雙USB總線開關(guān)電源的集線器，電源管理 |
| 文件頁數(shù)： | 12/19頁 |
| 文件大小： | 268K |
| 代理商： | TPS2157IDGQ |
TPS2149
TPS2159
SLVS401
–
AUGUST 2001
12
www.ti.com
TYPICAL CHARACTERISTICS
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
–
40
–
25
–
10
5
20
35
50
65
U
–
–
UNDERVOLTAGE LOCKOUT
vs
JUNCTION TEMPERATURE
TJ
–
Junction Temperature
–
°
C
Figure 16
Rising
Falling
80
95 110
APPLICATION INFORMATION
external capacitor requirements on power lines
A ceramic bypass capacitor (0.01-
μ
F to 0.1-
μ
F) between VIN and GND, close to the device, is recommended
to improve load transient response and noise rejection.
A bulk capacitor (4.7-
μ
F ) between VIN and GND is also recommended, especially if load transients in the
hundreds of milliamps with fast rise times are anticipated.
A 66-
μ
F bulk capacitor is recommended from OUTx to ground, especially when the output load is heavy. This
precaution helps reduce transients seen on the power rails. Additionally, bypassing the outputs with a 0.1-
μ
F
ceramic capacitor improves the immunity of the device to short-circuit transients.
LDO output capacitor requirements
Stabilizing the internal control loop requires an output capacitor connected between LDO_OUT and GND. The
minimum recommended capacitance is a 4.7
μ
F with an ESR value between 200 m
and 10
. Solid tantalum
electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the
ESR requirements.
overcurrent
A sense FET is used to measure current through the device. Unlike current-sense resistors, sense FETs do not
increase the series resistance of the current path. When an overcurrent condition is detected, the device
maintains a constant output current. Complete shut down occurs only if the fault is present long enough to
activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output is shorted before the device is
enabled or before VIN has been applied. The TPS2149 and TPS2159 sense the short and immediately switches
to a constant-current output.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS2159IDGNR | Analog IC |
| TPS2212DB | SINGLE-SLOT, PARALLEL INTERFACE POWER SWITCH FOR LOW POWER PC CARD SLOTS |
| TPS2383 | Power Over Ethernet Switch Side Manager |
| TPS2383PM | OCTAL POWER SOURCING EQUIPMENT POWER MANAGER |
| TPS2392DBT | Utillity Helmet with Headband; RoHS Compliant: NA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2158IDGN | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2158IDGN | 制造商:Texas Instruments 功能描述:Power Distribution Load Switch IC |
| TPS2158IDGNG4 | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2158IDGNR | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2158IDGNRG4 | 功能描述:電源開關(guān) IC - USB 3.3V LDO + Dual Switch RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。