参数资料
型号: MAX1972EEE+
厂商: Maxim Integrated Products
文件页数: 12/21页
文件大小: 0K
描述: IC REG BUCK SYNC 0.75A DL 16QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 100
类型: 降压(降压)
输出类型: 两者兼有
输出数: 2
输出电压: 1.5V,1.8V,2.5V,3.3V,可调
输入电压: 2.6 V ~ 5.5 V
PWM 型: 电流模式
频率 - 开关: 1.4MHz
电流 - 输出: 750mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
包装: 管件
供应商设备封装: 16-QSOP
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
V CC
IN
FB1
FBSEL1
FB
SELECT
REGULATOR 1
ERROR SIGNAL
SLOPE COMP
COMP1
CURRENT SENSE
CLAMP
PWM CONTROL
LX1
PGND
REF
SOFT-START
REFERENCE
VOLTAGE
1.2V
÷ 2(MAX1970/
MAX1972)/
÷ 4(MAX1971)
2.8MHz
OSCILLATOR
MAX1971 ONLY
RSI
POR
EN
THERMAL SHUTDOWN
VOK
MAX1970/MAX1972 ONLY
POR
COMP2
PFO
PFO
FB2
FBSEL2
REGULATOR 2
MAX1970
MAX1971
MAX1972
GND
Figure 1. Functional Diagram
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
12
______________________________________________________________________________________
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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 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
MAX1972EEE-TG05 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