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| 型号： | MAX8760ETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/39页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR QUICK PWM 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器，6 位 VID AMD 移动式 Turion? |
| 输入电压： | 4 V ~ 28 V |
| 输出数： | 2 |
| 输出电压： | 0.38 V ~ 1.55 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 管件 |
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Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
Table 1. Component Selection for Standard Multiphase Applications
DESIGNATION
Input Voltage Range
VID Output Voltage
(D5–D0)
Suspend Voltage
(SUS, S0, S1)
Maximum Load Current
Number of Phases ( η TOTAL )
Inductor (per Phase)
Switching Frequency
High-Side MOSFET (N H , per phase)
Low-Side MOSFET (N L , per phase)
Total Input Capacitance (C IN )
Total Output Capacitance (C OUT )
Current-Sense Resistor (R SENSE , per Phase)
For the MAX8760, the slew-rate controller ramps up the
output voltage in 12.5mV increments to the proper oper-
ating voltage (see Tables 3 and 4) set by either D0–D5
(SUS = GND) or S0, S1 (SUS = REF or high). The ramp
rate is set with the R TIME resistor (see the Output Voltage
Transition Timing section).
The ramp rate is 1/4 the rate set by the R TIME resistor
(see the Output Voltage Transition Timing section). The
controller pulls VROK low until at least 3ms after the
MAX8760 reaches the target DAC code.
Shutdown
When SHDN goes low, the MAX8760 enters low-power
shutdown mode. VROK is pulled low immediately, and
the output voltage ramps down to 0V in LSB increments
at 4 times the clock rate set by R TIME :
MAX8760 AMD MOBILE COMPONENTS
Circuit of Figure 1
7V to 24V
1.3V
(D5–D0 = 001010)
Not used
(SUS = GND)
30A
Two phases
0.56μH Panasonic ETQP4LR56WFC
300kHz (TON = REF)
Siliconix (1) Si7886DP
Siliconix (2) Si7356DP
(4) 10μF, 25V
Taiyo Yuden TMK432BJ106KM or
TDK C4532X5R1E106M
(4) 330μF, 2.5V
Sanyo 2R5TPE330M9
1m ?
Panasonic ERJM1WTJ1M0U
low (damped response), thereby eliminating the nega-
tive output voltage excursion that occurs when the con-
troller discharges the output quickly by permanently
turning on the low-side MOSFET (underdamped
response). This eliminates the need for the Schottky
diode normally connected between the output and
ground to clamp the negative output voltage excursion.
When the DAC reaches the 0V setting, DL_ goes high,
DH_ goes low, the reference turns off, and the supply
current drops to about 1μA. When a fault condition—out-
put undervoltage lockout, output overvoltage lockout, or
thermal shutdown—activates the shutdown sequence,
the controller sets the fault latch to prevent the controller
from restarting. To clear the fault latch and reactivate the
controller, toggle SHDN or cycle V CC power below 1V.
When SHDN goes high, the reference powers up. Once
t SHDN ≤
4 ? V DAC ?
f SLEW ? ? V LSB ? ?
the reference voltage exceeds its UVLO threshold, the
controller evaluates the DAC target and starts switching.
The slew-rate controller ramps up from 0V in LSB
increments to the currently selected output-voltage set-
where f SLEW = 500kHz ? 30k ? /R TIME , V DAC is the DAC
setting when the controller begins the shutdown
sequence, and V LSB = 12.5mV is the DAC’s smallest
voltage increment. Slowly discharging the output capac-
itors by slewing the output over a long period of time
(4/f SLEW ) keeps the average negative inductor current
ting at 1/4 the slew rate set by the R TIME resistor (see the
Power-Up Sequence section). There is no traditional soft-
start (variable current-limit) circuitry, so full output current
is available immediately.
______________________________________________________________________________________
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8760ETL+ | 功能描述:电流型 PWM 控制器 Dual-Phase Quick PWM Controller 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 |
| MAX8760ETL+T | 功能描述:电流型 PWM 控制器 Dual-Phase Quick PWM Controller 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 |
| MAX8760ETL-T | 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 |
| MAX8760EVKIT | 功能描述:电流型 PWM 控制器 Evaluation Kit for the MAX8760 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 |
| MAX8761ETG+ | 功能描述:LCD 驱动器 Linear-Regulator LCD Panel Power Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
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