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参数资料
| 型号： | MAX1742EEE |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | Replaced by TMS320C6410 : |
| 中文描述： | 4.7 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | QSOP-16 |
| 文件页数： | 10/16页 |
| 文件大小： | 597K |
| 代理商： | MAX1742EEE |
M
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
V
CC
470pF
2.2
μ
F
1
μ
F
10
μ
F
10
FBSEL
0.01
μ
F
FEEDBACK
SELECTION
CURRENT
SENSE
PWM LOGIC
AND
DRIVERS
SS
IN
FB
V
IN
3.0V TO 5.5V
LX
PGND
TOFF
R
TOFF
GND
NOTE:
HEAVY LINES DENOTE HIGH-CURRENT PATHS.
REF
REF
SUMMING
COMPARATOR
REF
REF
COMP
SKIP
SHDN
TIMER
V
IN
CURRENT
SENSE
G
m
C
OUT
V
OUT
MAX1742
MAX1842
Figure 2. Functional Diagram
TOFF
COMP
V
CC
FBSEL
SHDN
IN
PGND
GND
REF
SS
LX
FB
MAX1742
R
TOFF
1
μ
F
0.01
μ
F
L
2.2
μ
F
470pF
10
INPUT
C
IN
= 10
μ
F (MAX1742)
C
IN
= 33
μ
F (MAX1842)
OUTPUT
C
OUT
= 47
μ
F (MAX1742)
C
OUT
= 150
μ
F (MAX1842)
V
OUT
= 2.5V, FBSEL = V
CC
V
OUT
= 1.8V, FBSEL = REF
V
OUT
= 1.5V, FBSEL = FLOATING
Figure 1. Typical Circuit
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1843 | 2.7A, 1MHz, Low-Voltage, Step-Down Regulator with Internal Synchronous Rectification in QFN Package |
| MAX1843EGI | 2.7A, 1MHz, Low-Voltage, Step-Down Regulator with Internal Synchronous Rectification in QFN Package |
| MAX1845 | Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit |
| MAX1845EEI | Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit |
| MAX1845ETX | Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1742EEE+ | 功能描述:直流/直流开关调节器 1A/2.7A 1MHz Step Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1742EEE+T | 功能描述:直流/直流开关调节器 1A/2.7A 1MHz Step Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1742EEE-T | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1742EVKIT | 功能描述:直流/直流开关调节器 Evaluation Kit for the MAX1742 MAX1842 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体: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. |
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