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参数资料
| 型号： | MAX1971 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | 数字信号处理 |
| 英文描述： | Fixed-Point Digital Signal Processor 532-FCBGA |
| 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： | 12/20页 |
| 文件大小： | 371K |
| 代理商： | MAX1971 |
M
turns off and the internal low-side N-channel MOSFET
turns on. Now the inductor releases the stored energy
as its current ramps down while still providing current to
the output. The output capacitor stores charge when
the inductor current exceeds the load current and dis-
charges when the inductor current is lower, smoothing
the voltage across the load. Under overload conditions,
when the inductor current exceeds the current limit (see
the
Current Limit
section), the high-side MOSFET is not
turned on at the rising edge of the clock and the low-
side MOSFET remains on to let the inductor current
ramp down.
Current Sense
The current-sense circuit amplifies the current-sense
voltage generated by the high-side MOSFET
’
s on-resis-
tance and the inductor current (R
DS(ON)
I
INDUCTOR
).
This amplified current-sense signal and the internal
slope compensation signal are summed together into
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
12
______________________________________________________________________________________
Figure 1. Functional Diagram
FB
SELECT
PWM CONTROL
LX1
PGND
RSI
PFO
POR
MAX1970/MAX1972 ONLY
MAX1971 ONLY
CLAMP
ERROR SIGNAL
REGULATOR 1
REGULATOR 2
FB1
IN
FBSEL1
COMP1
REF
EN
COMP2
FB2
FBSEL2
GND
SLOPE COMP
CURRENT SENSE
SOFT-START
THERMAL SHUTDOWN
VOK
REFERENCE
VOLTAGE
1.2V
÷
2(MAX1970/
MAX1972)/
÷
4(MAX1971)
2.8MHz
OSCILLATOR
POR
PFO
V
CC
MAX1970
MAX1971
MAX1972
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1972 | Dual, 180∑ Out-of-Phase, 1.4MHz, 750mA Step- Down Regulator with POR and RSI/PFO |
| MAX1972EEE | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1973 | Smallest 1A, 1.4MHz Step-Down Regulators |
| MAX1973EUB | Smallest 1A, 1.4MHz Step-Down Regulators |
| MAX1974EUB | Smallest 1A, 1.4MHz Step-Down Regulators |
相关代理商/技术参数 |
参数描述 |
|---|---|
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| MAX19710ETN+ | 功能描述:ADC / DAC多通道 7.5Msps CODEC/AFE Full Duplex RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX19710ETN+T | 功能描述:ADC / DAC多通道 7.5Msps CODEC/AFE Full Duplex RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX19710ETN-T | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX19710EVCMODU+ | 功能描述:数据转换 IC 开发工具 MAX19710 Eval System RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
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