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参数资料
| 型号： | MAX8688BLETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/38页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY CTRLR/MONTR 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 电源控制器/监控器 |
| 电源电压： | 3 V ~ 3.6 V |
| 电流 - 电源： | 6.7mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
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Digital Power-Supply Controller/Monitor
with PMBus Interface
A3/ONOFF Operation
In addition to providing address information to the
MAX8688, A3/ONOFF can also be used as a control sig-
nal for turning the POL on or off, similar to the OPERATION
command. To use A3/ONOFF to control the POL, config-
ure the A3 Control Enable bit in MFR_MODE command.
When A3 control is enabled, a transition of A3/ONOFF
from low to high turns the POL on, as if the MAX8688 has
received an OPERATION ON command. A transition of
A3/ONOFF from high to low initiates a soft-off to the POL
—as if the MAX8688 has received an OPERATION OFF
command (soft-off, with sequencing). The MAX8688 still
responds to the PMBus OPERATION command while
A3 control is enabled. To detect the A3/ONOFF input,
the A3/ONOFF signal pulse width has to satisfy the
t A3_LOW and t A3_HIGH requirement to be detected. If
disabled (cleared to 0), the MAX8688 ignores the
A3/ONOFF state and function as directed by the OPER-
ATION command only.
The dual functionality of A3/ONOFF of the MAX8688
requires the system enable signal to be isolated from
A3/ONOFF until the address setting has been read and
latched by the MAX8688. Figure 11 shows one imple-
mentation for the three possible states of the
A3/ONOFF setting. In each case, the system enable
signal (MAX8688_EN) is applied to the input of a three-
state buffer whose output is kept in the high-impedance
state by a control input signal (HIZ_EN) for a time peri-
od during which the MAX8688 reads and latches the
A3/ONOFF address setting. After this period, the con-
trol signal HIZ_EN goes low and allows the system
enable signal to be applied to the MAX8688 A3/ONOFF
pin. After a t A3_LOW , the MAX8688_EN signal transi-
tions from low to high and causes the MAX8688s to
commence POL startup operations.
3.3V
33k ?
MAX8688_EN
MAX8688
A3/ONOFF
A2/SDAE
HIZ_EN
U1
A1/SCLE
REFO
1 μ F
AVDD
MAX8688_UVLO
REFO
MAX8688
A3/ONOFF
A2/SDAE
HIZ_EN
t RST_WAIT
U2
A1/SCLE
REFO
1 μ F
MAX8688_EN
A3/ONOFF
t A3_LOW
MAX8688
A3/ONOFF
U3
33k ?
A2/SDAE
A1/SCLE
REFO
1 μ F
HIZ_EN PLACES U1, U2, AND U3 OUTPUTS IN HIGH-IMPEDANCE STATE WHEN ASSERTED.
U1, U2, AND U3 ARE NOT NECESSARY IF AN EEPROM IS ATTACHED TO A1/SCLE AND A2/SDAE.
A1/SCLE, A2/SDAE ARE EITHER PULLED UP OR PULLED DOWN WITH 33k ? WHEN CONNECTED
TO AN EEPROM.
Figure 11. Application Diagram with A3/ONOFF as Both Address and On/Off Control Signal
20
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相关代理商/技术参数 |
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|---|---|
| MAX8688EVKIT+ | 功能描述:电流和电力监控器、调节器 DIGITAL POWER SUPPLY RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX868EPD | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX868EUB | 功能描述:电荷泵 Reg/Adj -2x Invertin Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX868EUB+ | 功能描述:电荷泵 Reg/Adj -2x Invertin Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX868EUB+T | 功能描述:电荷泵 Reg/Adj -2x Invertin Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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