- 您现在的位置：买卖IC网 > PDF目录16560 > MAX8663ETL+T (Maxim Integrated Products)IC PMIC LI+ SNGL CELL 40TQFN PDF资料下载
参数资料
| 型号： | MAX8663ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/34页 |
| 文件大小： | 0K |
| 描述： | IC PMIC LI+ SNGL CELL 40TQFN |
| 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 |
| 电流 - 电源： | 900µA |
| 电源电压： | 4.1 V ~ 8 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： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
Detailed Description
The MAX8662/MAX8663 highly integrated PMICs are
designed for use in smart cellular phones, PDAs,
AC ADAPTER
OR
USB INPUT
DC
Q1 INPUT-TO-SYS
SWITCH
SYS
Internet appliances, and other portable devices. They
integrate two synchronous buck regulators, a boost
regulator driving two to seven white LEDs (MAX8662
only), four low dropout (LDO) linear regulators, and a
linear charger for a single-cell Li+ battery. Figure 1 is
SYSTEM
LOAD
the block diagram and application circuit.
Q2
Q3
SPS circuitry offers flexible power distribution between
an AC adapter or USB source, battery, and system
load, and makes the best use of available power from
BATTERY-TO-SYS
SWITCH
(DISCHARGE PATH)
(CHARGE
PATH)
BAT
BATTERY
the AC adapter/USB input. The battery is charged with
any available power not used by the system load. If a
system load peak exceeds the current limit, supple-
mental current is taken from the battery. Thermal limit-
ing prevents overheating by reducing power drawn
from the input source.
MAX8662
MAX8663
GND
Two step-down DC-DC converters achieve excellent
light-load efficiency and have on-chip soft-start circuit-
ry; 1MHz switching frequency allows for small external
THM
R THM
components. Four LDO linear regulators feature low
quiescent current and operate from inputs as low as
1.7V. This allows the LDOs to operate from the step-
down output voltage to improve efficiency. The white
LED driver features easy adjustment of LED brightness
and open-LED overvoltage protection. A 1-cell Li+
charger has programmable charge current up to 1.25A
and a charge timer.
Smart Power Selector (SPS)
SPS seamlessly distributes power between the external
Figure 2. Smart Power Selector Block Diagram
Input Limiter
All regulated outputs (OUT1–OUT7) derive their power
from the SYS output. With an AC adapter or USB source
connected at DC, the input limiter distributes power
from the external power source to the system load and
battery charger. In addition to the input limiter’s primary
function of passing the DC power source to the system
and charger loads at SYS, it performs several additional
functions to optimize use of available power:
input, the battery, and the system load (Figure 2). The
basic functions of SPS are:
? With both the external power supply and battery
connected:
?
Input Voltage Limiting: If the voltage at DC rises,
SYS limits to 5.3V, preventing an overvoltage of the
system load. A DC voltage greater than 6.9V is con-
sidered invalid and the input limiter disconnects the
?
?
a) When the system load requirements exceed the
capacity of the external power input, the battery
supplies supplemental current to the load.
b) When the system load requirements are less than
the capacity of the external power input, the bat-
tery is charged with residual power from the input.
When the battery is connected and there is no
external power input, the system is powered from
the battery.
When an external power input is connected and
?
DC input entirely. The withstand voltage at DC is
guaranteed to be at least 9V. A DC input is also
invalid if it is less than BAT, or less than the DC
undervoltage threshold of 3.5V (falling). With an
invalid DC input voltage, SYS connects to BAT
through a 40m ? switch.
Input Overcurrent Protection: The current at DC is
limited to prevent input overload. This current limit
is automatically adjusted to match the capabilities
of source, whether it is a 100mA or 500mA USB
source, or an AC adapter. When the load exceeds
there is no battery, the system is powered from the
external power input.
A thermal-limiting circuit reduces battery-charge rate and
external power-source current to prevent overheating.
the input current limit, SYS drops to 100mV below
BAT and supplemental load current is provided by
the battery.
22
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| RMC06DREI-S734 | CONN EDGECARD 12POS .100 EYELET |
| HMC05DRTN-S734 | CONN EDGECARD 10POS DIP .100 SLD |
| HBM18DSUH | CONN EDGECARD 36POS .156 DIP SLD |
| RCC06DRYI-S93 | CONN EDGECARD 12POS DIP .100 SLD |
| EVAL-ADF4252EBZ2 | BOARD EVAL ADF4252 NO VCO/FILTER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8663EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX8663 EVAL KIT - Boxed Product (Development Kits) |
| MAX8664AEEP+ | 功能描述:DC/DC 开关控制器 Dual-Output Step Step-Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8664AEEP+T | 功能描述:DC/DC 开关控制器 Dual-Output Step Step-Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8664BEEP+ | 功能描述:DC/DC 开关控制器 Dual-Output Step Step-Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8664BEEP+T | 功能描述:DC/DC 开关控制器 Dual-Output Step Step-Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
发布紧急采购，3分钟左右您将得到回复。