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参数资料
| 型号： | MAX8688ALETG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/38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： | 75 |
| 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： | 管件 |
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Digital Power-Supply Controller/Monitor
with PMBus Interface
where R 1 is the upper feedback divider resistor, ? V O is
the required change in output voltage, and ? V DAC is
the DACOUT output voltage change that the user
allows. The recommended operating range for the
This value of R FB allows the MAX8688 to margin the
POL output voltage up by 10%. It is useful to check the
margin low condition by using the formula:
= 10 k ? × = 0 . 245 V
DACOUT voltage for POL output voltage adjustment is
between 30mV and 2V. It should be noted that ? V DAC
is the difference between the steady-state POL FB
? V O = R 1 ×
? V DAC
R FB
( 2 . 0 V ? 0 . 6 V )
57 k ?
node voltage, V FB , and the voltage limits on DACOUT.
This is best illustrated with an example as follows:
Consider an application involving a POL with V FB =
0.6V. Let the desired margining be ±10% for a POL
output voltage of 1V. For a POL with an upper voltage-
divider resistor R 1 = 10k ? , R FB is calculated as follows:
The effective margining range for the 57k ? resistor
therefore turns out to be between +10% and -24.5%.
It should be noted that the VOUT_TRANSITION_RATE
parameter has no effect on FB mode. The transition time
for margining in the FB mode of operation is a function of
the MFR_VOUT_CORRECTION_RATE parameter, R FB
t FB = ×
R FB = 10 k ? ×
(0.6V ? 0.03V)
0 . 1 V
= 57 k ?
and R 1 , and is given by the following formula:
R FB ? V OUT
R 1 MFR _ VOUT _ CORRECTION _ RATE
3.3V
MAX8688
DVDD
AVDD
0.1 μ F
DGND
POWER MONITOR
AGND
RS-
0.1 μ F
A1/SCLE
A2/SDAE
A3/ONOFF
200 ?
RS+
RS_C
LOAD
ADC
SMBus
CONTROLLER
ISN-
ISN+
R SENSE
SCL
SDA
RST
TEMP SENSOR
200 ?
ISN_C
INTERNAL REFERENCE
REFO
1 μ F
R 1
VO+
VO-
SYSTEM
CONTROLLER
PMBus COMMAND AND
STATUS REGISTERS
DAC
S1
DACOUT
FB
V IN+
R FB
R 2
POL
IRQ
CLKOUT
FLT
CLKIO
MAXQ μ C
ENOUT
EN
V IN-
Figure 5. Typical System Application—Feedback Mode
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8688ALETG/GH9 | 功能描述:电流和电力监控器、调节器 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 |
| MAX8688ALETG/GH9-T | 功能描述:电流和电力监控器、调节器 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 |
| MAX8688ALETG+ | 功能描述:电流和电力监控器、调节器 Digital Power-Supply Controller/Monitor 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 |
| MAX8688ALETG+T | 功能描述:电流和电力监控器、调节器 Digital Power-Supply Controller/Monitor 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 |
| MAX8688BHETG+ | 功能描述:电流和电力监控器、调节器 Digital Power-Supply Controller/Monitor 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 |
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