參數(shù)資料
型號(hào)： TPS62208DBV
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.67 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO5
封裝： PLASTIC, SOT-23, 5 PIN
文件頁(yè)數(shù)： 16/22頁(yè)
文件大?。?/td> 461K
代理商： TPS62208DBV
www.ti.com
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REF
Load Comparator
Skip Comparator
Current Limit Comparator
P-Channel
Power MOSFET
Driver
Shoot-Through
Logic
Control
Logic
Soft Start
1 MHz
Oscillator
Comparator
S
R
N-Channel
Power MOSFET
Comparator High
Comparator Low
Comparator Low 2
V(COMP)
Sawtooth
Generator
V
I
Undervoltage
Lockout
Bias Supply
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Comparator High
Comparator Low
Comparator Low 2
Compensation
VREF = 0.5 V
R2
See Note
R1
VI
EN
SW
FB
GND
Gm
DETAILED DESCRIPTION
OPERATION
SLVS417E – MARCH 2002 – REVISED MAY 2006
FUNCTIONAL BLOCK DIAGRAM
For the adjustable version (TPS62200) the internal feedback divider is disabled and the FB pin is directly connected
to the internal GM amplifier
The TPS6220x is a synchronous step-down converter operating with typically 1-MHz fixed frequency pulse width
modulation (PWM) at moderate to heavy load currents and in power save mode operating with pulse frequency
modulation (PFM) at light load currents.
During PWM operation the converter uses a unique fast response, voltage mode, controller scheme with input
voltage feed forward. This achieves good line and load regulation and allows the use of small ceramic input and
output capacitors. At the beginning of each clock cycle initiated by the clock signal (S), the P-channel MOSFET
switch is turned on, and the inductor current ramps up until the comparator trips and the control logic turns off
the switch. The current limit comparator also turns off the switch in case the current limit of the P-channel switch
is exceeded. Then the N-channel rectifier switch is turned on and the inductor current ramps down. The next
cycle is initiated by the clock signal again turning off the N-channel rectifier and turning on the P-channel switch.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62208DBVR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.875V Out Hi-Eff Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62208DBVRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.875V Out Hi-Eff Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62208DBVT 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.875V Out Hi-Eff Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62208DBVTG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.875V Out Hi-Eff Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62220DDCR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Adj 400mA Hi-Eff Step-Down Con 15uA RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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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