参数资料
型号: MAX1980ETP+
厂商: Maxim Integrated Products
文件页数: 22/33页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM 20-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 60
系列: Quick-PWM™
PWM 型: 控制器
输出数: 1
频率 - 最大: 550kHz
占空比: 50%
电源电压: 4.5 V ~ 5.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 85°C
封装/外壳: 20-WQFN 裸露焊盘
包装: 管件
Quick-PWM Slave Controller with
Driver Disable for Multiphase DC-DC Converter
SLAVE CURRENT-LIMIT VOLTAGES
vs. AVERAGE INDUCTOR CURRENT
160
I ADJ(MIN) = I PEAK = ITHS
140
V ITHM(HIGH)
V
R CM
120
MASTER
100
80
V ITHM(LOW)
CONTROLLER
60
40
R CM I LM(PEAK) = R CS I LS(PEAK)
R CM I LM(VALLEY) = R CS I LS(VALLEY)
V ITHS
SLAVE
CONTROLLER
]
20
0
? I ADJ - ? I INDUCTOR =
[
V OUT (V IN - V OUT )
V IN f SW L
0
10
20
30
40
50
AVERAGE INDUCTOR CURRENT (A)
MASTER CURRENT-LIMIT VOLTAGES
vs. AVERAGE INDUCTOR CURRENT
160
( )
140
120
100
80
60
40
20
0
UNADJUSTED ? I LIMIT ≤ ? I LIMIT = V ITHM(HIGH)
V ITHM(HIGH)
ADJUSTED ? I LIMIT ≤ ? I INDUCTOR
V ITHM(LOW)
R DS(ON)(MIN) = L LM(VALLEY)
R DS(ON)(MIN) = L LM(VALLEY)
A RDS - 1
R DS(ON)(MAX)
0
10
20
30
40
50
AVERAGE INDUCTOR CURRENT (A)
Figure 6. Master/Slave Current-Limit Thresholds
R ESR ≤
? I LOAD ( MAX ) LIR ? η ( η ? 1 ) ? ?
? ( t ON TRIG ) ?
+ t
?
?
In non-CPU applications, the output capacitor selection
often depends on how much ESR is needed to maintain
an acceptable level of output ripple voltage. The output
ripple voltage of a step-down controller equals the total
inductor ripple current multiplied by the output capaci-
tor ’ s ESR. When operating multiphase systems out-of-
phase, the peak inductor currents of each phase are
staggered, resulting in lower output ripple voltage by
reducing the total inductor ripple current. For out-of-
phase operation, the maximum ESR to meet ripple
requirements is:
This equation may be rewritten as the single phase rip-
ple current minus a correction due to the additional
phases:
V RIPPLE
? ? V OUT ? ?
L ?
where t TRIG is the MAX1980 ’ s trigger propagation
delay, η is the number of phases, and K is from Table
3. When operating the MAX1980 in-phase (POL =
? ? ( η ? 1 ) V OUT TRIG ?
? η ? ? ? V IN ? η V OUT ? ? V OUT ? ?
? ? ? ?
? ? V
? L ? ? ? ?
? ?
R ESR ≤
V RIPPLE
f SW ? ? IN ?
t
GND), the high-side MOSFETs turn on together, so the
output capacitors must simultaneously support the
combined inductor ripple currents of each phase.
22
______________________________________________________________________________________
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MAX1980ETP+ 功能描述:DC/DC 开关控制器 PWM Slave Controller w/Driver Disable RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX1980ETP+T 功能描述:DC/DC 开关控制器 PWM Slave Controller w/Driver Disable RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX1980ETP+TG075 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1980ETP-T 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX1980ETP-TG075 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: