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| 型号： | MAX8982MEWO+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 37/73页 |
| 文件大小： | 0K |
| 描述： | IC PWR MGMT ICERA E400 42WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 应用： | 电源，ICERA E400，E450 |
| 输入电压： | 4.1 V ~ 5.5 V |
| 输出数： | 10 |
| 输出电压： | 可编程 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 42-WFBGA，WLCSP |
| 供应商设备封装： | 42-WLP |
| 包装： | 带卷 (TR) |
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MAX8982A/MAX8982P/MAX8982X
Power-Management ICs for
ICERA E400 Platform
PWR_REQ
GROUP A : OUT 2,*
(BUILT-IN TIME DELAY TO
BUCK 2, BUCK 3**
~10μs
ENABLE REGULATORS)
OUTPUT DECAY DEPENDS ON THE LOAD
GROUP B : LDO1,*
OUT 3, BUCK 4**
GROUP C : OUT6,*
OUT5, OUT7, OUT8**
GROUP D : BUCK 1*, OUT4,*
OUT9
100μs
200μs
375μs
*THESE REGULATORS DEFAULT TO PWR_REQ CONTROL. THE OTHERS MUST BE PROGRAMED TO PWR_REQ CONTROL BY I 2 C.
**BUCK3, BUCK4, AND OUT8 ARE FOR THE MAX8982A/MAX8982P ONLY.
Figure 5. MAX8982_ Power-On Timing Diagram in PWR_REQ ON Mode After Power-Up
BUCK1, BUCK2, and BUCK3
Step-Down Converters
The step-down converters are optimized for high effi-
ciency over a wide load range, small external component
size, low output ripple, and excellent transient response.
The step-down converters also feature an internal
MOSFET switch with optimized on-resistance and an
internal synchronous rectifier to maximize the efficiency
and reduce the number of external components. The ICs
use a proprietary hysteretic PWM control scheme that
switches with a nearly fixed frequency. Figure 6 shows
the frequency variation versus load current with a 5V
input supply and at T A = +25 ° C.
FREQUENCY vs. LOAD AT 5V INPUT
Setting the Output Voltage on BUCK1
The default output is 0.9V. The BUCK1 voltage is program-
mable through I 2 C from 0.6V to 1.2V in 25mV increments.
Dynamic Voltage Scaling (DVS)
Function on Buck 1
BUCK1 includes DVS that allows two output voltages
to be programmed through I 2 C, and an external con-
trol input to select between the two voltages. Toggling
DVS1 changes the BUCK1 output voltage on-the-fly
between the two programmed voltages (Figure 7). Each
BUCK1DVS_ register specifies a voltage in the 0.6V to
1.2V range in 25mV increments.
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
BUCK1
BUCK2
BUCK3
I 2 C INTERFACE
0.6V TO 1.2V
IN 25mV STEPS
BUCK1DVS1
(0X3F)
(DEFAULT = 0.9V)
BUCK1DVS2
(0X40)
(DEFAULT = 0.9V)
BUCK1 OUTPUT
(DEFAULT = 0.9V)
1.0
0.8
0.6
0.4
Truth Table
DVS1
0.2
0
1
10
50
100 200 300 400
500
DVS1
High
BUCK1 OUTPUT
Set by BUCK1DVS2 register
LOAD (mA)
Low
Set by BUCK1DVS1 register
Figure 6. Frequency Variation vs. Load Current with a 5V Input
Supply
Maxim Integrated
Figure 7. DVS1 Logic Diagram
37
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8982PEWO+T | 功能描述:PMIC 解决方案 PMIC for ICERA E400/E450 Platform RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8982XEWO+T | 制造商:Maxim Integrated Products 功能描述:POWER MANAGEMENT IC FOR ICERA E400/E450 PLATFORM-MINI CARD - Tape and Reel |
| MAX8986EVKIT+ | 制造商:Maxim Integrated Products 功能描述:PMIC FOR BROADCOM BB ATHENA - Boxed Product (Development Kits) |
| MAX8986EWG+ | 制造商:Maxim Integrated Products 功能描述:POWER MANAGEMENT IC FOR CELL PHONE |
| MAX8986EWG+T | 制造商:Maxim Integrated Products 功能描述:POWER MANAGEMENT IC FOR CELL PHONE,800M 制造商:Maxim Integrated Products 功能描述:PMIC FOR BROADCOM BB ATHENA - Tape and Reel |
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