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参数资料
| 型号： | MAX1972 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual, 180∑ Out-of-Phase, 1.4MHz, 750mA Step- Down Regulator with POR and RSI/PFO |
| 中文描述： | 双路、180°异相、1.4MHz、750mA、降压型调节器，带有POR和RSI/PFO |
| 文件页数： | 3/20页 |
| 文件大小： | 371K |
| 代理商： | MAX1972 |
M
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
CC
= V
EN
= 5V, R
POR
= 100k
to IN, R
PFO
= 100k
to IN, V
RSI
= 0, C
REF
= 0.1μF, FBSEL1 = unconnected, FBSEL2 =
unconnected,
T
A
= 0
°
C to +85
°
C
, unless otherwise noted. Typical values are at T
A
= +25
°
C.)
PARAMETER
COMP1 AND COMP2
CONDITIONS
MIN
TYP
MAX
UNITS
COMP1
Transconductance
FB1 = COMP1,
V
COMP1
= 1.2V
FBSEL1 = unconnected
35
55
85
μS
COMP2
Transconductance
FB2 = COMP2,
V
COMP2
= 1.2V
FBSEL2 = unconnected
35
55
85
μS
LX1 AND LX2
V
IN
= 5.0V
V
IN
= 3.3V
V
IN
=2.6V
V
IN
= 5.0V
V
IN
= 3.3V
V
IN
= 2.6V
0.20
0.24
0.28
0.12
0.14
0.16
0.32
0.37
Internal High-Side
MOSFET On-Resistance
I
LX
= -180mA
0.23
0.25
Internal Low-Side
MOSFET On-Resistance
I
LX
= 180mA
LX_ Current-Sense
Transresistance
0.4
0.5
0.6
V/A
High side
Low side
V
LX1
= V
LX2
= 5.5V
V
LX1
= V
LX2
= 0
MAX1970/MAX1972
MAX1971
0.80
-1.6
1.2
-0.85
1.60
-0.40
20
LX_ Current-Limit
Threshold
Duty Cycle = 100%,
V
IN
= 2.6V to 5.5V
A
LX_ Leakage Current
V
IN
= 5.5V
-20
1.2
0.60
μA
1.4
0.70
100
15
10
1.6
0.80
LX_ Switching Frequency
V
IN
= 2.6V to 5.5V
MHz
LX_ Maximum Duty Cycle
%
MAX1970/MAX1972
MAX1971
20
15
LX_ Minimum Duty Cycle
V
IN
= 2.6V to 5.5V
%
POR
V
OUT
rising
V
OUT
falling
92
90
16.6
175
94
POR
Thresholds
Percentage of V
OUT
,
V
IN
= 2.6V to 5.5V
MAX1970
MAX1971/MAX1972
V
POR
= V
IN
= 5.5V, V
FB1
= V
FB2
= 1.15V
V
FB1
= 1.05V or V
FB2
= 1.05V or RSI = IN (MAX1971 only),
I
POR
= 1mA
FB1 = FB2 = GND, I
POR
= 100μA, V
IN
= 1.2V
87
13.3
140
-1
%
20
210
1
POR
Delay Time (T
D
)
ms
POR
Output Current, High
μA
POR
Output Voltage, Low
0.01
0.05
V
POR
Startup Voltage
0.01
0.05
V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1972EEE | 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 |
| MAX1972EEE+ | 功能描述:直流/直流开关调节器 Dual 180 Out 1.4MHz 750mA Step-Down 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 |
| MAX1972EEE+T | 功能描述:直流/直流开关调节器 Dual 180 Out 1.4MHz 750mA Step-Down 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 |
| MAX1972EEE-G05 | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1972EEE-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 |
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