參數(shù)資料
型號： TPS62304DRC
廠商： Texas Instruments, Inc.
英文描述： 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
中文描述： 500毫安，3 MHz的同步降壓轉換器芯片級封裝
文件頁數(shù)： 15/37頁
文件大小： 1299K
代理商： TPS62304DRC
www.ti.com
L = 0.9 H, C
O
= 10 F
VO
V
I
= 3.6 V,
V
O
= 1.5 V,
I
O
= 0 mA
t Time 400 s/div
E
L = 2.2 H, C
O
= 4.7 F,
VO
V
I
= 3.6 V,
V
O
= 1.6 V,
I
O
= 320 mA
V
t Time 50 s/div
Figure 29.
E
(
I
L
DETAILED DESCRIPTION
OPERATION
The TPS6230x, TPS6231x, and TPS6232x are synchronous step-down converters typically operating with a
3-MHz fixed frequency pulse width modulation (PWM) at moderate to heavy load currents. At light load currents,
the converter operates in power-save mode with pulse frequency modulation (PFM). The operating frequency is
set to 3 MHz and can be synchronized
on-the-fly
to an external oscillator.
TPS62300, TPS62301, TPS62302
TPS62303, TPS62304, TPS62305,
TPS62311, TPS62313, TPS62315, TPS62320, TPS62321
SLVS528E–JULY 2004–REVISED NOVEMBER 2007
START-UP
POWER DOWN (TPS62321)
Figure 30.
During PWM operation, the converter uses a unique fast response, voltage mode, controller scheme with input
voltage feed-forward. This achieves
best-in-class
load and line response and allows the use of tiny inductors and
small ceramic input and output capacitors. At the beginning of each switching cycle, 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 device integrates two current limits, one in the P-channel MOSFET and another one in the N-channel
MOSFET. When the current in the P-channel MOSFET reaches its current limit, the P-channel MOSFET is
turned off and the N-channel MOSFET is turned on. When the current in the N-channel MOSFET is above the
N-MOS current limit threshold, the N-channel MOSFET remains on until the current drops below its current limit.
The current limit in the N-channel MOSFET is important for small duty-cycle operation when the current in the
inductor does not decrease because of the P-channel MOSFET current limit delay, or because of start-up
conditions where the output voltage is low.
Copyright 2004–2007, Texas Instruments Incorporated
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Product Folder Link(s):
TPS62300, TPS62301, TPS62302 TPS62303, TPS62304, TPS62305, TPS62311, TPS62313,
TPS62315, TPS62320, TPS62321
相關PDF資料
PDF描述
TPS62304YZD 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
TPS62315YZ 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
TPS62320YZD 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
TPS62300DRC 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
TPS62300YZD 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
相關代理商/技術參數(shù)
參數(shù)描述
TPS62304DRCR 功能描述:直流/直流開關調(diào)節(jié)器 1.2V 500-mA 3-MHz Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62304DRCRG4 功能描述:直流/直流開關調(diào)節(jié)器 1.2V 500-mA 3-MHz Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62304YZDR 功能描述:直流/直流開關調(diào)節(jié)器 1.2V 500-mA 3-MHz Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62304YZDT 功能描述:直流/直流開關調(diào)節(jié)器 1.2V 500-mA 3-MHz Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62305DRCR 功能描述:直流/直流開關調(diào)節(jié)器 1.875V 500-mA 3-MHz Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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