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| 型号： | MAX8939EWV+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/45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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EVALUATION KIT AVAILABLE
MAX8939/MAX8939A/MAX8939B
System Power Management
for Mobile Handset
MAX8939 EWV+T
-40 N C to +85 N C
MAX8939A EWV+T
-40 N C to +85 N C
MAX8939B EWV+T
-40 N C to +85 N C
General Description
The MAX8939/MAX8939A/MAX8939B power manage-
ment ICs contain the necessary supplies and features for
supporting cell phone designs based on the Intel Mobile
Communications (IMC) 61XX 3G platform. Designed to power
all peripheral components in the platform, the ICs also provide
the necessary signals to control the 61XX baseband processor.
The integrated lithium-ion (Li+) charger is protected up
to 28V input and features a protected output voltage
for supply of a USB transceiver. Proprietary thermal-
regulation circuitry limits the die temperature during
fast-charging or when the ICs are exposed to high ambi-
ent temperatures, allowing maximum charging current
without damaging the ICs. A dedicated current regulator
is included for driving a charge indicator LED.
Four programmable low-noise, low-dropout linear regu-
lators (LDOs) provide the supply for noise sensitive
peripherals. A high power vibrator driver is I 2 C program-
mable in 70 PWM levels and 4 output voltages. The ICs
also offer two step-up converters; one high power, low
voltage (5V) to supply an external audio amplifier or
camera flash, and a high voltage (28V) supply for the
display and keyboard backlight. Two integrated 25mA
current regulators provide independent ramp-up and
ramp-down control, programmable through I 2 C.
The MAX8939/MAX8939A/MAX8939B are highly integrated
ICs that require very few external components and are avail-
able in a compact 2.5mm x 3.0mm, 0.65mm max height
wafer level package (WLP).
Applications
Companion Chip for Cell Phones/Smartphones
Features
S Step-Up Converter
700mA Guaranteed Output Current
I 2 C Programmable Output 3.5V to 5.0V in 16 Steps
Over 90% Efficiency
On-Chip FET and Synchronous Rectifier
Fixed 2MHz PWM Switching
Small 2.2μH to 10μH Inductor
S WLED Boost Converter
28V Max Step-Up Output Voltage
60mA Output Current
Integrated nMOS Power Switch
Over 90% Efficiency
Fixed 2MHz Switching
Small 4.7μH to 10μH Inductor
Two 25mA Individually Programmable Current
Regulators
I 2 C Programmable Output Current (50μA to
25.25mA) with 128-Step Pseudo Log Dimming
Individually Programmable Ramp (Up/Down)
Timers
Low Dropout (150mV max)
S Linear One-Cell Li+ Battery Charger
No External MOSFET, Reverse Blocking Diode,
or Current-Sense Resistor
Programmable Fast-Charge Current (1.5A RMS max
for the MAX8939 or 850mA RMS max for the
MAX8939A/MAX8939B)
Programmable Top-Off Current Threshold
Proprietary Die Temperature Regulation Control
4.1V to 10V Input Voltage Range (MAX8939)
4.1V to 6.25V Input Voltage Range (MAX8939A/
MAX8939B) with Input Overvoltage Protection
Up to 28V Low-Dropout Voltage (300mV at
500mA) Input Power-Source Detection Output
Input Overvoltage Protected 4.75V Output
(SAFE_OUT) from IN
Charge Current Monitor Output
Indicator LED
Hardware Input Enable
5s Watchdog Feature During Charge
S Four Low-Noise LDOs
1x 400mA, 2 x 200mA and 1x 100mA Output
Current
High 65dB (typ) PSRR
Low Noise (45μV RMS typ)
1.7V to 3.2V Programmable Output Voltage
Low Quiescent Current (25μA typ)
400mA LDO with Hardware Enable Input
S Vibrator Driver
Guaranteed 200mA Output Current
Programmable Output Voltage 1.3V to V INVIB
Repetition Frequency 23.8kHz
PWM Speed Control in 70 steps
Active Stop Brake
S Control Interface for 61XX Baseband
MAX8939/MAX8939A/MAX8939B Control
Through I 2 C RESET_IN Reset Input
Charger Detect PWR_ON_CMP Output
IRQ Interrupt Output
S 2.9V to 5.5V Supply Voltage Range
S Thermal Shutdown
Ordering Information
PART TEMP RANGE PIN-PACKAGE
30 WLP
(0.5mm pitch)
30 WLP
(0.5mm pitch)
30 WLP
(0.5mm pitch)
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5843; Rev 5; 12/12
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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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