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| 型号： | MAX1980ETP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/33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： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 85°C |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 包装： | 管件 |
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Quick-PWM Slave Controller with
Driver Disable for Multiphase DC-DC Converter
Pin Description (continued)
PIN
17
18
19
20
NAME
V+
LIMIT
ILIM
TRIG
DESCRIPTION
Battery Voltage Sense Connection. Connect V+ to the input power source. V+ is used only for PWM one-
shot timing (see the On-Time Control and Active Current Balancing section).
Open-Drain Current-Limit Output. Connect to the master controller ’ s adjustable current-limit input (ILIM)
according to the Standard Application Circuit (Figure 1). When the voltage across the master controller ’ s
current-sense resistor (V CM+ - V CM- ) exceeds the current-limit threshold (V ILIM /10), the MAX1980 pulls
LIMIT low.
Dual-Mode Current-Limit Adjustment and Standby Input. The current-limit threshold voltage is 1/10 the
voltage seen at ILIM (V ILIM ) over a 400mV to 1.5V range. If V ILIM drops below 250mV, the slave
controller enters a low-power standby mode, forcing DL low and DH low.
Trigger Input. Connect to the master controller ’ s low-side gate driver. The trigger input ’ s polarity is pin
selectable: POL = V CC or floating triggers on the rising edge (out-of-phase operation), and POL = GND
triggers on the falling edge (in-phase operation).
Table 1. Component Selection for Standard
Applications
Detailed Description
The MAX1980 step-down slave controller is intended for
low-voltage, high-current, multiphase DC-DC applica-
COMPONENT
Output Voltage
Input Voltage Range
Maximum Load Current
Inductor (each phase)
Frequency
High-Side MOSFET
(N H , each phase)
Low-Side MOSFET
(N L , each phase)
Input Capacitor (C IN )
Output Capacitor (C OUT )
Current-Sense Resistors
(R CS and R CM )
Voltage Positioning Gain
(A VPS )
CIRCUIT OF FIGURE 1
0.6V to 1.75V
7V to 24V
40A
0.6μH
Sumida CDEP134H-0R6 or
Panasonic ETQP6F0R6BFA
300kHz (TON = float)
International Rectifier
(2) IRF7811W
International Rectifier
(2) IRF7822 or
Fairchild (3) FDS7764A or
(6) 10μF, 25V
Taiyo Yuden
TMK432BJ106KM or
TDK C4532X5R1E106M
(8) 270μF, 2.0V
Panasonic EEFUE0E271R
1.5m ?
1
tions. The MAX1980 slave controller can be combined
with any of Maxim ’ s Quick-PWM step-down controllers to
form a multiphase DC-DC converter. When compared to
single-phase operation, multiphase conversion lowers the
peak inductor current by distributing the load current
between parallel power paths. This simplifies component
selection, power distribution to the load, and thermal lay-
out. Existing Quick-PWM controllers, such as the
MAX1718, function as the master controller, providing
accurate output-voltage regulation, fast transient
response, and multiple fault-protection features.
Synchronized to the master ’ s low-side gate driver, the
MAX1980 includes a constant on-time controller, syn-
chronous rectifier gate drive, active current balancing,
and precision current-limit circuitry.
On-Time Control and Active
Current Balancing
The MAX1980 slave controller uses a constant on-time,
voltage feed-forward architecture similar to Maxim ’ s
Quick-PWM controllers (Figure 2). The control algorithm
is simple: the high-side switch on-time is determined
solely by a one-shot whose period is inversely propor-
tional to input voltage and directly proportional to the
compensation voltage (V COMP ). Another one-shot sets a
minimum off-time (130ns typical). The on-time one-shot
is triggered when the following conditions are satisfied:
The slave detects a transition on the TRIG input, the
slave controller ’ s inductor current is below its current-
limit threshold, and the minimum off time has expired.
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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: |
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