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| 型号： | MAX8734AEEI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/33页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY CONTROLLER 28QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 电源控制器 |
| 输入电压： | 4.5 V ~ 24 V |
| 电流 - 电源： | 25µA |
| 工作温度： | -40°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 |
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High-Efficiency, Quad-Output, Main Power-
Supply Controllers for Notebook Computers
Pin Description
PIN
MAX8732A
MAX8733A
MAX8734A
NAME
FUNCTION
3.3V SMPS Current-Sense Input. Connect CS3 to a current-sensing resistor from the source
1
—
CS3
of the synchronous rectifier to GND. The voltage at ILIM3 determines the current-limit
threshold (see the Current-Limit Circuit (ILIM_) 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 connected to V CC . In adjustable mode, the current-limit threshold is 1/10 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, overvoltage protection, and discharge mode (DL = low in shutdown).
Connect PRO to GND to enable undervoltage and overvoltage protection (see the Fault
Protection section), and output discharge mode.
5V SMPS Current-Limit Adjustment. The GND-LX current-limit threshold defaults to 100mV if
11
11
ILIM5
ILIM5 is connected to V CC . In adjustable mode, the current-limit threshold is 1/10 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 min).
12
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8734AEEI+ | 功能描述:电流和电力监控器、调节器 Quad-Out Main Power Supply Controller RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8734AEEI+G104 | 功能描述:电流和电力监控器、调节器 High-Efficiency Quad-Output Main Power-Supply Controllers for Notebook Computers RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8734AEEI+T | 功能描述:电流和电力监控器、调节器 Quad-Out Main Power Supply Controller RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8734AEEI+TG104 | 功能描述:电流和电力监控器、调节器 High-Efficiency Quad-Output Main Power-Supply Controllers for Notebook Computers RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8734AEEI-T | 功能描述:电流和电力监控器、调节器 RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
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