- 您现在的位置：买卖IC网 > PDF目录1841 > MAX1977EEI+ (Maxim Integrated Products)IC CNTRLR PS QUAD HI EFF 28QSOP PDF资料下载
参数资料
| 型号： | MAX1977EEI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/32页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR PS QUAD HI EFF 28QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 控制器，笔记本电脑电源系统 |
| 输入电压： | 4.5 V ~ 24 V |
| 输出数： | 4 |
| 输出电压： | 3.3V，5V，2 V ~ 5.5 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-QSOP |
| 供应商设备封装： | 28-QSOP |
| 包装： | 管件 |
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页当前第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
High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
Pin Description
PIN
MAX1777
MAX1977
MAX1999
NAME
FUNCTION
3.3V SMPS Current-Sense Input. Connect CS3 to a current-sensing resistor from the source of
1
—
CS3
the synchronous rectifier to GND. The voltage at ILIM3 determines the current-limit threshold
(see the Current-Limit (ILIM) Circuit section).
—
2
1
2
N.C.
PGOOD
No Connection. Not internally connected.
Power-Good Output. PGOOD is an open-drain output that is pulled low if either output is
disabled or is more than 10% below its nominal value.
3.3V SMPS Enable Input. The 3.3V SMPS is enabled if ON3 is greater than the SMPS on level
3
3
ON3
and disabled if ON3 is less than the SMPS off level. If ON3 is connected to REF, the 3.3V
SMPS starts after the 5V SMPS reaches regulation (delay start). Drive ON3 below the clear
fault level to reset the fault latches.
5V SMPS Enable Input. The 5V SMPS is enabled if ON5 is greater than the SMPS on level and
4
4
ON5
disabled if ON5 is less than the SMPS off level. If ON5 is connected to REF, the 5V SMPS
starts after the 3.3V SMPS reaches regulation (delay start). Drive ON5 below the clear fault
level to reset the fault latches.
3.3V SMPS Current-Limit Adjustment. The GND-LX current-limit threshold defaults to 100mV if
5
5
ILIM3
ILIM3 is tied to V CC . In adjustable mode, the current-limit threshold is 1/10th the voltage seen
at ILIM3 over a 0.5V to 3V range. The logic threshold for switchover to the 100mV default value
is approximately V CC - 1V. Connect ILIM3 to REF for a fixed 200mV threshold.
Shutdown Control Input. The device enters its 6μA supply current shutdown mode if
V SHDN is less than the SHDN input falling edge trip level and does not restart until V SHDN is
6
6
SHDN
greater than the SHDN input rising edge trip level. Connect SHDN to V+ for automatic startup.
SHDN can be connected to V+ through a resistive voltage-divider to implement a
programmable undervoltage lockout.
7
7
FB3
3.3V SMPS Feedback Input. Connect FB3 to GND for fixed 3.3V operation. Connect FB3 to a
resistive voltage-divider from OUT3 to GND to adjust the output from 2V to 5.5V.
2V Reference Output. Bypass to GND with a 0.22μF (min) capacitor. REF can source up to
8
8
REF
100μA for external loads. Loading REF degrades FB_ and output accuracy according to the
REF load-regulation error.
9
9
FB5
5V SMPS Feedback Input. Connect FB5 to GND for fixed 5V operation. Connect FB5 to a
resistive voltage-divider from OUT5 to GND to adjust the output from 2V to 5.5V.
Overvoltage and Undervoltage Fault Protection Enable/Disable. Connect PRO to V CC to
10
10
PRO
disable undervoltage and overvoltage protection. Connect PRO to GND to enable
undervoltage and overvoltage protection (see the Fault Protection section).
5V SMPS Current-Limit Adjustment. The GND-LX current-limit threshold defaults to 100mV if
11
11
ILIM5
ILIM5 is tied to V CC . In adjustable mode, the current-limit threshold is 1/10th the voltage seen
at ILIM5 over a 0.5V to 3V range. The logic threshold for switchover to the 100mV default value
is approximately V CC - 1V. Connect ILIM5 to REF for a fixed 200mV threshold.
Low-Noise Mode Control. Connect SKIP to GND for normal idle-mode (pulse-skipping)
12
12
SKIP
operation or to V CC for PWM mode (fixed frequency). Connect to REF or leave floating for
ultrasonic mode (pulse skipping, 25kHz minimum).
12
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1980ETP+ | IC REG CTRLR BUCK PWM 20-TQFN |
| MAX1983EUT+T | IC REG LDO ADJ .3A SOT23-6 |
| MAX1992ETG+T | IC REG CTRLR BUCK PWM CM 24-TQFN |
| MAX1997ETJ+T | IC PWR SUPPLY TFT LCD 32TQFN |
| MAX256ASA+T | IC DRVR H-BRIDGE 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1977EEI+ | 功能描述:DC/DC 开关控制器 Quad Out Main Power Supply 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 |
| MAX1977EEI+T | 功能描述:DC/DC 开关控制器 Quad Out Main Power Supply 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 |
| MAX1977EEI-T | 功能描述:DC/DC 开关控制器 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 |
| MAX1977EEI-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1978ETM | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。