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| 型号： | MAX8663ETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 27/34页 |
| 文件大小： | 0K |
| 描述： | IC POWER MANAGE 40-TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 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： | 管件 |
| 产品目录页面： | 1411 (CN2011-ZH PDF) |
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Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
VL
SWITCH OPEN
WHEN CHARGER
DISABLED
MAX8662
MAX8663
10k ?
55.71k ?
V THM_C = 2.4V RISING (TYP)
-
COLD
+
60mV HYST
BAD TEMP
THM
97.71k ?
V THM_H = 0.9V FALLING (TYP)
-
+
HOT
60mV HYST
DISABLE CHARGER
ESD
DIODE
54.43k ?
V THM_D = 0.1V FALLING (TYP)
+
-
ENABLE THM
60mV HYST
6.43k ?
GND
GND
Figure 6. Thermistor Input
Figure 6 shows a simplified version of the THM input.
Ensure that the physical size of the thermistor is such
that the circuit of Figure 6 does not cause self-heating.
Step-Down DC-DC Converters
(OUT1 and OUT2)
OUT1 and OUT2 are high-efficiency, 1MHz, current-mode
step-down converters with adjustable output voltage.
The OUT1 regulator outputs 0.98V to V IN at up to 1200mA
while OUT2 outputs 0.98V to V IN at up to 900mA.
OUT1 and OUT2 have individual enable inputs. When
enabled, the OUT1 and OUT2 gradually ramp the out-
put voltage over a 400μs soft-start time. This soft-start
eliminates input inrush current spikes.
OUT1 and OUT2 can operate at a 100% duty cycle,
which allows the regulators to maintain regulation at the
lowest possible battery voltage. The OUT1 dropout volt-
age is 72mV with a 600mA load and the OUT2 dropout
voltage is 90mV with a 450mA load (does not include
inductor resistance). During 100% duty-cycle operation,
the high-side p-channel MOSFET turns on continuously,
connecting the input to the output through the inductor.
Step-Down Converter Operating Modes
OUT1 and OUT2 can operate in either auto-PWM mode
(PWM low) or forced-PWM mode (PWM high). In auto-
PWM mode, OUT1 and OUT2 enter skip mode when
the load current drops below a predetermined level. In
skip mode, the regulator skips cycles when they are not
needed, which greatly decreases quiescent current
and improves efficiency at light loads. In forced-PWM
mode, the converters operate with a constant 1MHz
switching frequency regardless of output load. Output
voltage is regulated by modulating the switching duty
cycle. Forced-PWM mode is preferred for low-noise
systems, where switching harmonics can occur only at
multiples of the constant-switching frequency and are
easily filtered; however, regulator operating current is
greater and light-load efficiency is reduced.
Synchronous Rectification
Internal n-channel synchronous rectifiers eliminate the
need for external Schottky diodes and improve efficiency.
The synchronous rectifier turns on during the second
half of each switching cycle. During this time, the volt-
age across the inductor is reversed, and the inductor
current ramps down. In PWM mode, the synchronous
rectifier turns off at the end of the switching cycle. In
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8663ETL+ | 功能描述:电池管理 PMIC for Single-Cell Li+ Bat-Operated Dev RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX8663ETL+T | 功能描述:电池管理 PMIC for Single-Cell Li+ Bat-Operated Dev RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| 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 |
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