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参数资料
| 型号： | MAX1544ETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/42页 |
| 文件大小： | 0K |
| 描述： | IC QUICK-PWM DUAL-PHASE 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，AMD Hammer |
| 输入电压： | 2 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 0.68 V ~ 1.55 V |
| 工作温度： | -40°C ~ 100°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 Hammer CPU Core Power Supplies
D0 – D4
D0
D1
D2
D3
D4
DECODER
IN
OUT
S0 – S1
DECODER
0
SUSPEND
MUX
S0
S1
IN
OUT
1
OUT
DAC
SEL
SEL
SUS
2.5V
SUS 3-LEVEL
DECODER
1.0V
Figure 3. Internal Multiplexers Functional Diagram
Suspend Mode
When the processor enters low-power suspend mode, it
sets the regulator to a lower output voltage to reduce
power consumption. The MAX1544 includes independent
suspend-mode output voltage codes set by the four-level
S0 – S1 inputs and the three-level SUS input. When the
CPU suspends operation (SUS = REF or high), the con-
troller disables the offset amplifier and overrides the 5-bit
VID DAC code set by either D0 – D4 (normal operation).
The master controller slews the output to the selected
suspend-mode voltage. During the transition, the
MAX1544 blanks VROK and the UVP fault protection until
24 R TIME clock cycles after the slew-rate controller reach-
es the suspend-mode voltage.
SUS is a three-level logic input: GND, REF, or high. This
expands the functionality of the controller without
adding an additional pin. This input is intended to be
driven by a dedicated open-drain output with the pullup
resistor connected either to REF (or a resistive divider
from V CC ) or to a logic-level bias supply (3.3V or
greater). When pulled up to REF, the MAX1544 selects
the upper suspend voltage range. When pulled high
(2.7V or greater), the controller selects the lower sus-
pend voltage range. See the Electrical Characteristics
for exact logic level voltages.
Output Voltage Transition Timing
The MAX1544 is designed to perform mode transitions in
a controlled manner, automatically minimizing input surge
currents. This feature allows the circuit designer to
achieve nearly ideal transitions, guaranteeing just-in-time
arrival at the new output voltage level with the lowest pos-
sible peak currents for a given output capacitance.
At the beginning of an output voltage transition, the
MAX1544 blanks the VROK output, preventing it from
changing states. VROK remains blanked during the
transition and is enabled 24 clock cycles after the
slew-rate controller has set the final DAC code value.
The slew-rate clock frequency (set by resistor R TIME )
must be set fast enough to ensure that the transition is
completed within the maximum allotted time.
The slew-rate controller transitions the output voltage in
25mV steps during soft-start, soft-shutdown, and sus-
pend-mode transitions. The total time for a transition
depends on R TIME , the voltage difference, and the
accuracy of the MAX1544 ’ s slew-rate clock, and is not
dependent on the total output capacitance. The greater
the output capacitance, the higher the surge current
required for the transition. The MAX1544 automatically
controls the current to the minimum level required to
complete the transition in the calculated time, as long
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1544ETL+ | 功能描述:电压模式 PWM 控制器 Dual-Phase Quick-PWM Controller 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 |
| MAX1544ETL+T | 功能描述:电压模式 PWM 控制器 Dual-Phase Quick-PWM Controller 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 |
| MAX1544ETL+TG075 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1544ETL-T | 功能描述:电压模式 PWM 控制器 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 |
| MAX1544EVKIT | 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE, QUICK-PWM CONTROLLER FOR AMD HAMM - Bulk |
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