參數(shù)資料
型號(hào)： TPS62000YEGR
廠商： Texas Instruments, Inc.
元件分類： DC/DC變換器
英文描述： HIGH-EFFICIENCY STEP-DOWN LOW POWER DC-DC CONVERTER
中文描述： 高效率降壓型小功率DC - DC變換器
文件頁(yè)數(shù)： 6/25頁(yè)
文件大小： 475K
代理商： TPS62000YEGR
SLVS294C SEPTEMBER 2000 REVISED SEPTEMBER 2003
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
current flowing backward through the inductance which increases the efficiency. An antiringing switch across
the inductor prevents parasitic oscillation caused by the residual energy stored in the inductance (see Figure
12).
NOTE:
The
antiringing
switch is only activated in the fixed output voltage versions. It is not enabled for the
adjustable output voltage version TPS62000.
soft start
As the enable pin (EN) goes high, the soft-start function generates an internal voltage ramp. This causes the
start-up current to slowly rise preventing output voltage overshoot and high inrush currents. The soft-start
duration is typical 1 ms (see Figure 13). When the soft-start function is completed, the error amplifier is
connected directly to the internal voltage reference.
enable
Logic low on EN forces the TPS6200x into shutdown. In shutdown, the power switch, drivers, voltage reference,
oscillator, and all other functions are turned off. The supply current is reduced to less than 1
μ
A in the shutdown
mode.
undervoltage lockout
An undervoltage lockout circuit provides the save operation of the device. It prevents the converter from turning
on when the voltage on V
IN
is less than typically 1.6 V
power good comparator
The power good (PG) comparator has an open drain output capable of sinking typically 10
μ
A. The PG is only
active when the device is enabled (EN = high). When the device is disabled (EN = low), the PG pin is high
impedance.
The PG output is only valid after a 100
μ
s delay after the device is enabled and the supply voltage is greater
than 1.2 V. This is only important in cases where the pullup resistor of the PG pin is connected to an external
voltage source which might cause an initial spike (false high signal) within the first 100
μ
s after the input voltage
exceeds 1.2 V. This initial spike can be filtered with a small R-C filter to avoid false power good signals during
start-up.
If the PG pin is connected to the output of the TPS62000 with a pullup resistor, no initial spike (false high signal)
occurs and no precautions have to be taken during start-up.
The PG pin becomes active high when the output voltage exceeds typically 94.5% of its nominal value. Leave
the PG pin unconnected when not used.
no load operation
In case the converter operates in the forced PWM mode and there is no load connected to the output, the
converter will regulate the output voltage by allowing the inductor current to reverse for a short period of time.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62000YEGT 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Adj 600mA Hi-Eff Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS62000YZGR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Adj 600-mA 95% Eff Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS62000YZGT 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Adj 600-mA 95% Eff Step-Down Conv RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS62001DGS 功能描述:直流/直流開關(guān)調(diào)節(jié)器 0.9V Out 600mA Step-Down Con 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
TPS62001DGSG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 0.9V Out 600mA Step-Down Con 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
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