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| 型号： | MAX8819AETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/29页 |
| 文件大小： | 0K |
| 描述： | IC PMIC W/INT CHARGER 28TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 手持/移动设备 |
| 电源电压： | 4.1 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
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PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
NOTES
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V DC
V BAT < V SYS < V DC
V SYS
V BAT
V BAT
t SS-D-S
V EN123
V OUT3
V OUT2
V OUT1
t SS3
t SS2
t SS1
HIGH IMPEDANCE
V RST1
t DRST1
V EN4
V OUT4
V SYS - V D
t SS4
V SYS - V D
V CEN
V CHG
t SS_CHG
Figure 7. MAX8819C Enable/Disable Waveforms Example
input of the system μP, the processor can begin its
boot-up sequence up at this time.
4) During the μP’s boot-up sequence, it asserts EN123
to keep the step-down converters enabled, even if
DC is removed.
5) After the μP has booted, it asserts EN4 to turn on the
display’s backlight.
6) CEN is asserted by the μP to start a charge cycle.
7) The external supply is removed from DC and V SYS
falls. The converters remain enabled because the μP
has asserted EN123 and EN4, but the battery charg-
ing current drops to zero even though CEN is still
asserted. CHG goes high impedance.
8) System is turned off by deasserting EN123, EN4, and
CEN; RST1 goes low to reset the μP.
Figure 7 notes:
1) The MAX8819C is off with no external power applied
to DC. The system voltage (V SYS ) is equal to the bat-
tery voltage (V BAT ).
2) An external supply is applied to DC that causes the
step-down regulator to power up after the DC-to-
SYS soft-start time (t SS-D-S ). When the DC input is
valid and DC is not suspended, V SYS rises.
3) EN123 is pulled high to start the OUT3, OUT2, and
OUT1 power-up sequence. When OUT1 reaches the
reset trip threshold (V THRST ), the reset deassert
delay timer starts. When the reset deassert delay
timer expires (t DRST1 200ms typ.), RST1 goes high-
impedance. If RST1 is connected to the RESET input
of the system μP, the processor can begin its boot-
up sequence at this time.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8819AEVKIT+ | 功能描述:PMIC 解决方案 Evaluation Kit for the MAX8819A MAX8819B MAX8819C and MAX8819D RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8819BETI+ | 功能描述:PMIC 解决方案 PMIC w/Charger & Smart Power Selector RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8819BETI+T | 功能描述:PMIC 解决方案 PMIC w/Charger & Smart Power Selector RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8819CETI+ | 功能描述:PMIC 解决方案 PMIC w/Charger & Smart Power Selector RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8819CETI+T | 功能描述:PMIC 解决方案 PMIC w/Charger & Smart Power Selector 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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