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参数资料
| 型号： | MAX8660AETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 38/44页 |
| 文件大小： | 0K |
| 描述： | IC POWER MANAGE XSCALE 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 应用： | 处理器 |
| 电源电压： | 2.6 V ~ 6 V |
| 工作温度： | -40°C ~ 85°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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High-Efficiency, Low-I Q , PMICs with Dynamic
Voltage Management for Mobile Applications
LEGEND
MASTER TO SLAVE
SLAVE TO MASTER
A. WRITING TO A SINGLE REGISTER WITH THE “WRITE BYTE” PROTOCOL
1
7
1
1
8
1
8
1
1
NUMBER OF BITS
S
SLAVE ADDRESS
0
A
REGISTER POINTER
A
DATA
A P
R/W
B. WRITING TO MULTIPLE REGISTERS WITH THE “MULTIPLE-BYTE REGISTER-DATA PAIR” PROTOCOL
1
S
7
SLAVE ADDRESS
1
0
1
A
8
REGISTER POINTER X
1
A
8
DATA X
1
A
NUMBER OF BITS
R/W
8
REGISTER POINTER n
1
A
8
DATA n
1
A
NUMBER OF BITS
8
1
8
1
1
NUMBER OF BITS
REGISTER POINTER Z
A
DATA Z
A P
Figure 11. Writing to the MAX8660/MAX8661
Design Procedure
Setting the Output Voltages
Inductor Selection
Calculate the inductor value (L IDEAL ) for each of REG1
through REG4 as follows:
The REG1 and REG2 regulators each have three preset
voltages that are programmed with the SET1 and SET2
inputs. See the REG1 (VCC_IO) Step-Down DC-DC
L IDEAL =
4 x V IN x D x (1 ? D)
I OUT ( MAX ) x f OSC
D = OUT
Converter (MAX8660 Only) and REG2 (VCC_IO,
VCC_MEM) Step-Down DC-DC Converters sections for
more information. V8 is fixed at 3.3V and cannot be
changed.
V3 –V7 are set by the I 2 C interface. See the I 2 C
Interface section for more information. Note that while
operating in forced-PWM mode with an input voltage
greater than 4.3V, the minimum output voltage of REG3
and REG4 is limited by the minimum duty cycle. In
forced-PWM mode, the minimum output voltage for
REG3 or REG4 is:
V 3 MIN = 0 . 167 x V PV 3
V 4 MIN = 0 . 167 x V PV 4
Note that the above minimum voltage limitation does
not apply to normal-mode operation.
38
This sets the peak-to-peak inductor current ripple to 1/4
the maximum output current. The oscillator frequency,
f OSC , is 2MHz, and the duty cycle, D, is:
V
V IN
Given L IDEAL , the peak-to-peak inductor ripple current
is 0.25 x I OUT(MAX) . The peak inductor current is 1.125
x I OUT(MAX) . Make sure that the saturation current of the
inductor exceeds the peak inductor current, and the
rated maximum DC inductor current exceeds the maxi-
mum output current (I OUT(MAX) ). Inductance values
smaller than L IDEAL can be used to reduce inductor
size; however, if much smaller values are used, peak
inductor current rises and a larger output capacitance
may be required to suppress output ripple. Larger
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8660AETL+ | 功能描述:PMIC 解决方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8660AETL+T | 功能描述:PMIC 解决方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8660BETL+ | 功能描述:PMIC 解决方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8660BETL+T | 功能描述:PMIC 解决方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8660ETL/V+ | 功能描述:PMIC 解决方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
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