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| 型号： | MAX17080GTL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 44/48页 |
| 文件大小： | 0K |
| 描述： | IC CONTROLLER AMD SVI 40-TQFN |
| 标准包装： | 60 |
| 应用： | 控制器，AMD SVI |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 3 |
| 输出电压： | 0.013 V ~ 1.55 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： | 管件 |
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AMD 2-/3-Output Mobile Serial
VID Controller
Table 8. SVI Send Byte Address Description
Table 9. Serial VID 8-Bit Field Encoding
BIT
6:4
3
2
1
0
DESCRIPTION
Always 110b.
X—don’t care.
VDD1, if set then the following data byte contains
the VID for VDD1. Bit 2 is ignored in combined
mode (GNDS1 or GNDS2 = V DDIO ). VDD1 refers
to CORE1 of the AMD CPU.
VDD0, if set then the following data byte contains
the VID for VDD0 in separate mode, and the
unified VDD in combined mode. VDD0 refers to
CORE0 of the AMD CPU.
VDDNB, if set then the following data byte
contains the VID for VDDNB.
BIT
7
6:0
DESCRIPTION
PSI_L: Power-Save Indicator
0 means the processor is at an optimal load and
the SMPS(s) can enter power-saving mode. The
SMPS operates in pulse-skipping mode after
exiting the boot mode. Offset is disabled if
previously enabled by the OPTION pin. The
MAX17080 enters 1-phase operation if in
combined mode (GNDS1 or GNDS2 = H).
1 means the processor is in a high current-
consumption state. The SMPS operates in forced-
PWM mode after exiting the boot mode. Offset is
enabled if previously enabled by the OPTION
pin. The MAX17080 returns to 2-phase operation
if in combined mode (GNDS1 or GNDS2 = H).
SVID[6:0] as defined in Table 7.
Acknowledge
? ?
V IN ( SKIP ) = V OUT ??
?
:
? f SW t ON ( MIN ) ?
Each receiving device, when addressed, is obliged to
generate an acknowledge after the reception of each
byte. The master device must generate an extra clock
pulse that is associated with this acknowledge bit. The
device that acknowledges has to pull down the SVD
line during the acknowledge clock pulse so that the
SVD line is stable low during the high period of the
acknowledge-related clock pulse. Of course, setup and
hold times must be taken into account. See Figure 12.
Command Byte
A complete command consists of a START condition
(S) followed by the MAX17080’s slave address and a
data phase, followed by a STOP condition (P). For the
slave address, bits 6:4 are always 110 and bit 3 is X
(don’t care). The WR bit should always be 1 since read
functions are not supported. Figure 13 is the SVI bus
data-transfer summary. Table 8 is a description of the
SVI send byte address and Table 9 describes serial
VID 8-bit field encoding.
SMPS Applications Information
Duty-Cycle Limits
Minimum Input Voltage
The minimum input operating voltage (drop-out voltage)
is restricted by stability requirements, not the minimum
off-time (t OFF(MIN) ). The MAX17080 does not include
slope compensation, so the controller becomes unsta-
ble with duty cycles greater than 50% per phase:
V IN(MIN) ≥ 2V OUT(MAX)
However, the controller can briefly operate with duty
cycles over 50% during heavy load transients.
Maximum Input Voltage
The MAX17080 controller has a minimum on-time,
which determines the maximum input operating voltage
that maintains the selected switching frequency. With
higher input voltages, each pulse delivers more energy
than the output is sourcing to the load. At the beginning
of each cycle, if the output voltage is still above
the feedback threshold voltage, the controller does not
trigger an on-time pulse, resulting in pulse-skipping
operation regardless of the operating mode selected by
PSI_L. This allows the controller to maintain regulation
above the maximum input voltage, but forces the con-
troller to effectively operate with a lower switching fre-
quency. This results in an input threshold voltage at
which the controller begins to skip pulses (V IN(SKIP) ):
1
?
where f SW is the per-phase switching frequency set by
the OSC resistor, and t ON(MIN) is 150ns (max) minus the
driver’s turn-on delay (DL low to DH high). For the best
high-voltage performance, use the slowest switching
frequency setting (100kHz per phase, R OSC = 432k ? ).
PCB Layout Guidelines
Careful PCB layout is critical to achieve low switching
losses and clean, stable operation. The switching
power stage requires particular attention (Figure 14). If
possible, mount all the power components on the top
side of the board with their ground terminals flush
against one another, and mount the controller and ana-
log components on the bottom layer so the internal
ground layers shield the analog components from any
44
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| MAX17080GTL+ | 功能描述:开关变换器、稳压器与控制器 Integrated Circuits (ICs) Voltage Regulators - Special Purpose - IC CONTROLLER AMD SVI 40-TQFN RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MAX17080GTL+T | 功能描述:开关变换器、稳压器与控制器 Integrated Circuits (ICs) Voltage Regulators - Special Purpose - IC CONTROLLER AMD SVI 40-TQFN RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MAX17081EVKIT+ | 功能描述:电源管理IC开发工具 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 |
| MAX17081EWV+ | 功能描述:电池管理 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 |
| MAX17081EWV+T | 功能描述:电池管理 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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