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参数资料
| 型号： | MAX17082GTL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 32/48页 |
| 文件大小： | 0K |
| 描述： | IC CTLR PWM DUAL IMVP-6.5 40TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器， Intel IMVP-6+，IMVP-6.5? |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 0.013 V ~ 1.5 V |
| 工作温度： | -40°C ~ 105°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（5x5） |
| 包装： | 带卷 (TR) |
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Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
Suspend Mode
When the processor enters low-power deeper sleep
mode, the IMVP-6 CPU sets the VID DAC code to a
dynamic VID transitions, the transition time (t TRAN ) is
given by:
V NEW OLD
lower output voltage and drives DPRSLPVR high. The
MAX17021/MAX17082/MAX17482 respond by slewing
the internal target voltage to the new DAC code, switch-
t TRAN =
- V
( dV TARGET dt )
ing to single-phase operation, and letting the output
voltage gradually drift down to the deeper sleep volt-
age. During the transition, the MAX17021/MAX17082/
MAX17482 blank both the upper and lower PWRGD
and CLKEN thresholds until 20μs after the internal tar-
get reaches the deeper sleep voltage. Once the 20μs
timer expires, the MAX17021/MAX17082/MAX17482
reenable the lower PWRGD and CLKEN threshold, but
keep the upper threshold blanked until the output volt-
age reaches the regulation level. PHASEGD remains
blanked high impedance while DPRSLPVR is high.
where dV TARGET /dt = 12.5mV/μs x 71.5k Ω /R TIME is the
slew rate, V OLD is the original output voltage, and V NEW
is the new target voltage. See TIME Slew Rate
Accuracy in Electrical Characteristics for slew-rate lim-
its. For soft-start and shutdown, the controller automati-
cally reduces the slew rate to 1/8.
The output voltage tracks the slewed target voltage,
making the transitions relatively smooth. The average
inductor current per phase required to make an output-
voltage transition is:
Output-Voltage-Transition Timing
The MAX17021/MAX17082/MAX17482 perform mode
I L ?
C OUT
η TOTAL
× ( dV TARGET dt )
transitions in a controlled manner, automatically mini-
mizing input surge currents. This feature allows the cir-
cuit designer to achieve nearly ideal transitions,
guaranteeing just-in-time arrival at the new output-volt-
age level with the lowest possible peak currents for a
given output capacitance.
At the beginning of an output-voltage transition, the
MAX17021/MAX17082/MAX17482 blank both PWRGD
thresholds, preventing the PWRGD open-drain output
from changing states during the transition. The con-
troller enables the lower PWRGD threshold approxi-
mately 20μs after the slew-rate controller reaches the
target output voltage, but the upper PWRGD threshold
remains blanked until the output voltage reaches the
regulation level if the controller enters pulse-skipping
operation. The slew rate (set by resistor R TIME ) must be
set fast enough to ensure that the transition can be
completed within the maximum allotted time.
The MAX17021/MAX17082/MAX17482 automatically
control the current to the minimum level required to
complete the transition in the calculated time. The slew-
rate controller uses an internal capacitor and current
source programmed by R TIME to transition the output
voltage. The total transition time depends on R TIME , the
voltage difference, and the accuracy of the slew-rate
controller (C SLEW accuracy). The slew rate is not
dependent on the total output capacitance, as long as
the surge current is less than the current limit. For all
where dV TARGET /dt is the required slew rate, C OUT is
the total output capacitance, and η TOTAL is the number
of active phases.
Deeper Sleep Transitions
When DPRSLPVR goes high, the MAX17021/MAX17082/
MAX17482 immediately disable phase 2 (DH2 and DL2
forced low), blank PHASEGD high impedance, and enter
pulse-skipping operation (see Figures 5 and 6). If the
VIDs are set to a lower voltage setting, the output drops
at a rate determined by the load and the output capaci-
tance. The internal target still ramps as before, and
PWRGD remains blanked high impedance until 20μs
after the output voltage reaches the internal target.
? Fast C4E Deeper Sleep Exit: When exiting deeper
sleep (DPRSLPVR pulled low) while the output volt-
age still exceeds the deeper sleep voltage, the
MAX17021/MAX17082/MAX17482 quickly slew
(50mV/μs min regardless of R TIME setting) the inter-
nal target voltage to the DAC code provided by the
processor as long as the output voltage is above the
new target. The controller remains in skip mode until
the output voltage equals the internal target. Once
the internal target reaches the output voltage, phase
2 is enabled. The controller blanks PWRGD,
PHASEGD, and CLKEN until 20μs after the transition
is completed. See Figure 5.
32
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17083ETG+ | 功能描述:直流/直流开关调节器 Low-Voltage Internal Switch Step-Down 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 |
| MAX17083ETG+T | 功能描述:直流/直流开关调节器 Low-Voltage Internal Switch Step-Down 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 |
| MAX17083EVKIT+ | 功能描述:电源管理IC开发工具 Low-Voltage Internal Switch Step-Down 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 |
| MAX17085BETL+ | 功能描述:电池管理 Dual Main Step-Down Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17085BETL+T | 功能描述:电池管理 Dual Main Step-Down Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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