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| 型号： | MAX17409GTI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/32页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR NVIDIA CPU 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 系列： | Quick-PWM™ |
| 应用： | 处理器 |
| 电流 - 电源： | 1.5mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 包装： | 管件 |
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1-Phase Quick-PWM GPU Controller
Pin Description
PIN
1
2
3
4
5
NAME
IMON
GNDS/OFSP
FB
CSN
CSP
FUNCTION
Current Monitor Output. The MAX17409 IMON output sources a current that is directly proportional
to the current-sense voltage as defined by:
I IMON = G m(IMON) x (V CSP - V CSN )
where G m(IMON) = 5mS (typ).
The IMON current is unidirectional (sources current out of IMON only) for positive current-sense
values. For negative current-sense voltages, the IMON current is zero.
Connect an external resistor between IMON and GNDS to create the desired IMON gain based on
the following equation:
R IMON = 1.0V/(I LOAD(MAX) x R SENSE x G m(IMON) )
where I LOAD(MAX) is the maximum load current, and R SENSE is the current-sense voltage.
The IMON voltage is internally clamped to 1.1V. The transconductance amplifier and voltage
clamp are internally compensated, so IMON cannot drive large external capacitance values. To
filter the IMON signal, use an RC filter as shown in Figure 1.
Remote Ground-Sense Input/Positive Offset Input. Connect directly to the ground-sense pin or
ground connection of the load. GNDS internally connects to a transconductance amplifier that
adjusts the feedback voltage—compensating for voltage drops between the regulator’s ground and
the processor ’s ground.
Remote-Sense Feedback Input and Voltage-Positioning Transconductance Amplifier Output.
Connect resistor R FB between FB and the output remote-sense pin (or Kelvin-sensed to the supply
pin of the load) for best accuracy and to set the steady-state droop based on the voltage-
positioning gain requirement:
R FB = R DROOP /(R SENSE x G MD )
where R DROOP_DC is the desired voltage-positioning slope, G MD = 600μS (typ), and R SENSE is the
current-sense resistance with respect to CSP to CSN current-sense inputs. See the Current Sense
section for details on designing with sense resistors or inductor DCR sensing.
Shorting FB directly to the output effectively disables voltage positioning, but impacts the stability
requirements. Designs that disable voltage positioning require a higher minimum output
capacitance ESR to maintain stability (see the Output Capacitor Selection section).
FB enters a high-impedance state in shutdown.
Negative Inductor Current-Sense Input. Connect CSN to the negative terminal of the inductor
current-sensing resistor or directly to the negative terminal of the inductor if the lossless DCR
sensing method is used (see Figure 3).
Positive Inductor Current-Sense Input. Connect CSP to the positive terminal of the inductor current-
sensing resistor or directly to the positive terminal of the filtering capacitor used when the
lossless DCR sensing method is used (see Figure 3).
Pulse-Skipping Control Input. The SKIP signal indicates the power usage and sets the operating
mode of the MAX17409. When the system forces SKIP high, the MAX17409 immediately enters
automatic pulse-skipping mode. The controller returns to continuous forced-PWM mode when SKIP
is pulled low and the output is in regulation. SKIP determines the operating mode and output-
voltage transition slew rate as shown in the truth table below:
6
SKIP
SKIP
0
1
Functionality
Normal slew rate, forced-PWM mode
Normal slew rate, skip mode
The SKIP state is ignored during soft-start and shutdown. The MAX17409 always uses pulse-
skipping mode during startup to ensure a monotonic power-up. During shutdown, the controller
always uses forced-PWM mode so the output can be actively discharged.
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17409GTI+ | 功能描述:电压模式 PWM 控制器 1-Phase Quick-PWM RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX17409GTI+T | 功能描述:电压模式 PWM 控制器 1-Phase Quick-PWM RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1740EUB | 功能描述:转换 - 电压电平 Integrated Circuits (ICs) RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| MAX1740EUB+ | 功能描述:转换 - 电压电平 SIM/Smart Card Level Translator RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| MAX1740EUB+T | 功能描述:转换 - 电压电平 SIM/Smart Card Level Translator RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
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