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| 型号： | MAX15021ATI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 500kHz ~ 4MHz |
| 电流 - 输出： | 2A，4A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
MAX15021
Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Tracking/Sequencing Capability
Coincident/Ratiometric Tracking
The enable inputs in conjunction with digital soft-start
and soft-stop provide coincident/ratiometric tracking.
Track an output voltage by connecting a resistive
divider from the output being tracked to its enable
input. For example, for V OUT2 to coincidentally track
V OUT1 , connect the same resistive divider used for
FB2, from V OUT1 to EN2 to SGND (see Figure 2).
Track ratiometrically by connecting EN_ to SGND. This
synchonizes the soft-start and soft-stop of all the regu-
lator references, and hence their respective output volt-
ages will track ratiometrically (see Figure 2).
When the MAX15021 regulators are configured as volt-
age trackers, output short-circuit fault conditions at
either master or slave output are handled carefully—nei-
ther the master nor slave output will remain energized
when the other output is shorted to ground. When the
slave is shorted and enters hiccup mode, the master will
soft-stop. When the master is shorted and the part
enters in hiccup mode, the slave will ratiometrically soft-
stop. Coming out of hiccup mode, both outputs will soft-
start coincidently or ratiometrically depending on their
initial configuration. During the thermal shutdown or
power-off when the input falls below its UVLO, the out-
put voltages decrease at a rate depending on the
respective output capacitance and load.
See Figure 1 for a graphical representation of coinci-
dent/ratiometric tracking.
Sequencing
When sequencing, the voltage at the enable inputs
must exceed 1.225V (typ) for each PWM controller to
start (see Figure 1c).
RATIOMETRIC TRACKING
V RIN1
EN1
EN2
SEL
AVIN
OUTPUT 1 IS THE MASTER AND
OUTPUT 2 IS THE SLAVE.
V RIN2
EN2
EN1
COINCIDENT TRACKING
V RIN1
EN1
V OUT1
R A
EN2
R B
V OUT2
R A
FB2
R B
COINCIDENT TRACKING
V RIN2
EN2
V OUT2
R C
EN1
R D
V OUT1
R C
FB1
R D
SEL
UNCONNECTED
SEL
AVIN
SEL
UNCONNECTED
OUTPUT 2 IS THE MASTER AND
OUTPUT 1 IS THE SLAVE.
OUTPUT 1 IS THE MASTER AND
OUTPUT 2 IS THE SLAVE.
OUTPUT 2 IS THE MASTER AND
OUTPUT 1 IS THE SLAVE.
Figure 2. Ratiometric Tracking and Coincident Tracking Configurations
Maxim Integrated
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15021ATI/V+ | 制造商:Maxim Integrated Products 功能描述:DUAL, 4A/2A, 4MHZ, STEP-DOWN DC-DCREGULATOR WITH TRACKING/SE - Rail/Tube |
| MAX15021ATI/V+T | 制造商:Maxim Integrated Products 功能描述:DUAL, 4A/2A, 4MHZ, STEP-DOWN DC-DCREGULATOR WITH TRACKING/SE - Tape and Reel |
| MAX15021ATI+ | 功能描述:直流/直流开关调节器 Dual 4A/2A 4MHz w/Tracking/Seq 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 |
| MAX15021ATI+T | 功能描述:直流/直流开关调节器 Dual 4A/2A 4MHz w/Tracking/Seq 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 |
| MAX15021EVKIT+ | 功能描述:电源管理IC开发工具 MAX15021 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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