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| 型号： | MAX8734AEEI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/33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
MAX8733A is optimized for “thin and light” applications with
a 5V/400kHz SMPS and a 3.3V/500kHz SMPS. The
MAX8734A provides a pin-selectable switching frequency,
allowing either 200kHz/300kHz or 400kHz/500kHz operation
of the 5V/3.3V SMPSs, respectively.
Light-load efficiency is enhanced by automatic Idle-
Mode operation, a variable-frequency pulse-skipping
mode that reduces transition and gate-charge losses.
MAX8732A
MAX8733A
MAX8734A
TON
(MAX8734 ONLY)
BST3
DH3
LX3
V+
Each step-down, the power-switching circuit consists of
two n-channel MOSFETs, a rectifier, and an LC output fil-
ter. The output voltage is the average AC voltage at the
switching node, which is regulated by changing the duty
cycle of the MOSFET switches. The gate-drive signal to
the n-channel, high-side MOSFET must exceed the
battery voltage, and is provided by a flying-capacitor
boost circuit that uses a 100nF capacitor connected
to BST_.
PGOOD
PGOOD3
PGOOD5
BST5
DH5
3.3V
5V
LX5
DL3
CS3
(MAX8732A/
MAX8733A)
ILIM3
LDO5
SMPS PWM
CONTROLLER
SMPS PWM
CONTROLLER
LDO5
DL5
CS5
(MAX8732A/
MAX8733A)
ILIM5
FB3
FB5
OUT3
OUT5
EN3
2.91V
4.56V
EN5
LDO3
3V
LINEAR
REG
5V
LINEAR
REG
LDO5
V CC
ON3
ON5
SHDN
PRO
POWER-ON SEQUENCE/
CLEAR FAULT LATCH
THERMAL
SHUTDOWN
2V
REFERENCE
REF
GND
Figure 3. Detailed Functional Diagram
16
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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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