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参数资料
| 型号： | MAX8939EWV+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 43/45页 |
| 文件大小： | 0K |
| 描述： | IC PWR MGMT HANDSETS 30WLP |
| 标准包装： | 2,500 |
| 应用： | 充电泵，无线设备 |
| 输入电压： | 2.9 V ~ 5.5 V |
| 输出数： | 7 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
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MAX8939/MAX8939A/MAX8939B
System Power Management
for Mobile Handset
Diode Selection
The OUT2 LED converter uses an external rectifier diode.
A Schottky diode is recommended due to its fast recov-
ery time and low forward voltage drop. Ensure that the
diode’s average and peak current rating exceeds the
average output current and peak inductor current. In
addition, the diode’s reverse breakdown voltage must
exceed the maximum V OUT2 .
PCB Layout
Due to fast switching waveforms and high current paths,
careful PCB layout is required. Minimize trace lengths
ICs’ ground terminal, and place input and output capaci-
tor grounds as close together as possible. Use separate
power ground and analog ground copper areas, and
connect them together at the output capacitor ground.
Keep traces short, direct, and wide.
Keep noisy traces, such as the LX_ node trace, away from
sensitive analog circuitry. For improved thermal perfor-
mance, maximize the copper area of the LX_ and PGND_
traces. Refer to the MAX8939/MAX8939A/MAX8939B
Evaluation Kit for an example layout.
between the IC and the inductor, the diode, the input
capacitor, and the output capacitor. Minimize trace
lengths between the input and output capacitors and the
PROCESS: BiCMOS
Chip Information
Typical Operating Circuit
DC/USB
CHG_IN
BATT
TO SYSTEM LOAD
1 μ F
LX1
10 μ F
Li+
BATTERY
USB
TRANSCEIVER
OPEN
1 μ F
CHG
SAFE_OUT
PGND1
COMP1
22 μ H
2200pF
22 μ F
LED3
CHG_MON
PWR_ON_CMP
OUT1
22 μ F
5V/700mA
AUDIO AMPLIFIER
BROADBAND
PROCESSOR
SCL
SDA
LDO1
4.7 μ F
2.9V/400mA
MMC CARD
BATT
1 μ F
10 μ F
IRQ
RESET_IN
LX2
OUT2
MAX8939
MAX8939A
MAX8939B
LDO1_EN
LDO4
LDO2
eMMC_EN
ANALOG 2.8V/100mA
1 μ F
DIGITAL SUPPLY
1.8V/200mA
22 μ F
ANALOG
CAMERA
BLUETOOTH/FMR
COMBO, GPS
DISPLAY
BACKLIGHT
KEYPAD
BACKLIGHT
1 μ F
0.22 μ F
PGND2
COMP2
LED1
LDO3
INVIB
OUTVIB
REF
22 μ F
1 μ F
2.8V/200mA
PWM SWITCH
DRIVER
1 μ F
BATT
DISPLAY
VIBRATOR
Maxim Integrated
LED2
AGND
0.1 μ F
43
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8939QEWV+T | 制造商:Maxim Integrated Products 功能描述:SYSTEM POWER - Tape and Reel |
| MAX893LESA | 功能描述:电源开关 IC - USB 1.2A Current-Limited High-Side PCh Switch RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX893LESA+ | 功能描述:电源开关 IC - USB 1.2A Current-Limited High-Side PCh Switch RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX893LESA+T | 功能描述:电源开关 IC - USB 1.2A Current-Limited High-Side PCh Switch RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX893LESA-T | 功能描述:电源开关 IC - USB 1.2A Current-Limited High-Side PCh Switch RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
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