- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄220084 > TPS54313MPWPREP (TEXAS INSTRUMENTS INC) 6.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 PDF資料下載
參數(shù)資料
| 型號： | TPS54313MPWPREP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | GREEN, PLASTIC, HTSSOP-20 |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 614K |
| 代理商： | TPS54313MPWPREP |
www.ti.com
Slow-Start/Enable (SS/ENA)
t
d +
C
(SS)
1.2 V
5 mA
(2)
t
(SS) +
C
(SS)
0.7 V
5 mA
(3)
VBIAS Regulator (VBIAS)
Voltage Reference
SGLS376A – FEBRUARY 2007 – REVISED MARCH 2007
PERFORMANCE GRAPHS (continued)
The slow-start/enable pin provides two functions; first, the pin acts as an enable (shutdown) control by keeping
the device turned off until the voltage exceeds the start threshold voltage of approximately 1.2 V. When SS/ENA
exceeds the enable threshold, device start up begins. The reference voltage fed to the error amplifier is linearly
ramped up from 0 V to 0.891 V in 3.35 ms. Similarly, the converter output voltage reaches regulation in
approximately 3.35 ms. Voltage hysteresis and a 2.5-
s falling edge deglitch circuit reduce the likelihood of
triggering the enable due to noise.
DEVICE
OUTPUT VOLTAGE
SLOW START
TPS54311
0.9 V
3.3 ms
TPS54312
1.2 V
4.5 ms
TPS54313
1.5 V
5.6 ms
TPS54314
1.8 V
3.3 ms
TPS54315
2.5 V
4.7 ms
TPS54316
3.3 V
6.1 ms
The second function of the SS/ENA pin provides an external means of extending the slow-start time with a
low-value capacitor connected between SS/ENA and AGND. Adding a capacitor to the SS/ENA pin has two
effects on start-up. First, a delay occurs between release of the SS/ENA pin and start up of the output. The
delay is proportional to the slow-start capacitor value and lasts until the SS/ENA pin reaches the enable
threshold. The start-up delay is approximately:
Second, as the output becomes active, a brief ramp-up at the internal slow-start rate may be observed before
the externally set slow-start rate takes control and the output rises at a rate proportional to the slow-start
capacitor. The slow-start time set by the capacitor is approximately:
The actual slow-start is likely to be less than the above approximation due to the brief ramp-up at the internal
rate.
The VBIAS regulator provides internal analog and digital blocks with a stable supply voltage over variations in
junction temperature and input voltage. A high quality, low-ESR, ceramic bypass capacitor is required on the
VBIAS pin. X7R or X5R grade dielectrics are recommended because their values are more stable over
temperature. The bypass capacitor should be placed close to the VBIAS pin and returned to AGND. External
loading on VBIAS is allowed, with the caution that internal circuits require a minimum VBIAS of 2.7 V and
external loads on VBIAS with ac or digital switching noise may degrade performance. The VBIAS pin may be
useful as a reference voltage for external circuits.
The voltage reference system produces a precise Vref signal by scaling the output of a temperature stable
bandgap circuit. During manufacture, the bandgap and scaling circuits are trimmed to produce 0.891 V at the
output of the error amplifier, with the amplifier connected as a voltage follower. The trim procedure adds to the
high precision regulation of the TPS54311-16, since it cancels offset errors in the scale and error amplifier
circuits.
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TL4050A25IDBZT | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO3 |
| TL4050B41IDCKT | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 4.096 V, PDSO5 |
| TC54VN5601EMB723 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PSSO3 |
| TPS62220DDC | 0.88 A SWITCHING REGULATOR, 1850 kHz SWITCHING FREQ-MAX, PDSO5 |
| TS3431AILT | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, PDSO3 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54313PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Lo-In Voltage 3A Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54313PWP | 制造商:Texas Instruments 功能描述:DSP CONTROLLER 制造商:Texas Instruments 功能描述:IC, SYNC BUCK PWM SWITCHER, 20-HTSSOP |
| TPS54313PWPG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Lo-In Voltage 3A Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54313PWPR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Lo-In Voltage 3A Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54313PWPRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Lo-In Voltage 3A Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。