參數(shù)資料
型號： MAX1742EEE+T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： 1A/2.7A, 1MHz, Step-Down Regulators with Synchronous Rectification and Internal Switches
中文描述： 4.7 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.150 INCH, 0.025 INCH PITCH, QSOP-16
文件頁數(shù)： 2/16頁
文件大?。?/td> 597K
代理商： MAX1742EEE+T
MAX1742/MAX1842
1A/2.7A, 1MHz, Step-Down Regulators with
Synchronous Rectification and Internal Switches
10
______________________________________________________________________________________
Synchronous Rectification
In a step-down regulator without synchronous rectifica-
tion, an external Schottky diode provides a path for cur-
rent to flow when the inductor is discharging. Replacing
the Schottky diode with a low-resistance NMOS syn-
chronous switch reduces conduction losses and
improves efficiency.
The NMOS synchronous-rectifier switch turns on follow-
ing a short delay after the PMOS power switch turns off,
thus preventing cross conduction or “shoot through.” In
VCC
470pF
2.2
F
1
F
10
F
10
FBSEL
0.01
F
FEEDBACK
SELECTION
CURRENT
SENSE
PWM LOGIC
AND
DRIVERS
SS
IN
FB
VIN
3.0V TO 5.5V
LX
PGND
TOFF
RTOFF
GND
NOTE: HEAVY LINES DENOTE HIGH-CURRENT PATHS.
REF
SUMMING
COMPARATOR
REF
COMP
SKIP
SHDN
TIMER
VIN
CURRENT
SENSE
Gm
COUT
VOUT
MAX1742
MAX1842
Figure 2. Functional Diagram
TOFF
COMP
VCC
FBSEL
SHDN
IN
PGND
GND
REF
SS
LX
FB
MAX1742
RTOFF
1
F
0.01
F
L
2.2
F
470pF
10
INPUT
CIN = 10
F (MAX1742)
CIN = 33
F (MAX1842)
OUTPUT
COUT = 47
F (MAX1742)
COUT = 150
F (MAX1842)
VOUT = 2.5V, FBSEL = VCC
VOUT = 1.8V, FBSEL = REF
VOUT = 1.5V, FBSEL = FLOATING
Figure 1. Typical Circuit
相關(guān)PDF資料
PDF描述
MAX1742EEE+ 1A/2.7A, 1MHz, Step-Down Regulators with Synchronous Rectification and Internal Switches
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1742EVKIT 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Evaluation Kit for the MAX1742 MAX1842 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
MAX17434GTL+ 制造商:Maxim from Components Direct 功能描述:THE MAXIM MAX17434GTL+ IS A PWM REGULATOR. - Rail/Tube 制造商:Maxim 功能描述:The Maxim MAX17434GTL+ is a PWM Regulator.
MAX17435ETG+ 功能描述:電池管理 High f SMBus Battery Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX17435ETG+T 功能描述:電池管理 High f SMBus Battery Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX17435EVKIT+ 功能描述:電池管理 High Frequency SMBus Battery Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
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