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参数资料
| 型号： | MAX1904EAI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/33页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR PWR SPLY LN 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 应用： | 控制器，笔记本电脑电源系统 |
| 输入电压： | 4.2 V ~ 30 V |
| 输出数： | 4 |
| 输出电压： | 2.5 V ~ 5 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
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500kHz Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
Pin Description
SSOP
1
2
PIN
QFN
29
30
NAME
CSH3
CSL3
FUNCTION
Current-Sense Input for the 3.3V SMPS. Current-limit level is 100mV referred to CSL3.
Current-Sense Input. Also serves as the feedback input in fixed-output mode.
Feedback Input for the 3.3V SMPS. Regulates at FB3 = REF (approx. 2.5V) in
3
31
FB3
adjustable mode. FB3 is a dual-mode input that also selects the 3.3V fixed output
voltage setting when connected to GND. Connect FB3 to a resistor-divider for
adjustable-output mode.
12OUT
(MAX1902)
12V/120mA Linear-Regulator Output. Input supply comes from V DD . Bypass 12OUT to
GND with 1μF (min).
4
5
1
2
STEER
(MAX1901/
MAX1904)
V DD
(MAX1902)
SECFB
(MAX1901/
MAX1904)
Logic-Control Input for Secondary Feedback. Selects the PWM that uses a transformer
and secondary feedback signal (SECFB):
STEER = GND: 3.3V SMPS uses transformer
STEER = V L : 5V SMPS uses transformer
Supply Voltage Input for the 12OUT Linear Regulator. Also connects to an internal
resistor-divider for secondary winding feedback and to an 18V overvoltage shunt
regulator clamp.
Secondary Winding Feedback Input. Normally connected to a resistor-divider from an
auxiliary output. SECFB regulates at V SECFB = 2.5V (see the Secondary Feedback
Regulation Loop section). Connect to V L if not used.
Oscillator Synchronization and Frequency Select. Connect to V L for 500kHz operation;
6
3
SYNC
connect to GND for 333kHz operation. Can be driven at 400kHz to 583kHz for external
synchronization.
7
8
9
10
11
4
5
7
8
9
TIME/ON5
GND
REF
SKIP
RESET
Dual-Purpose Timing Capacitor Pin and ON/ OFF Control Input. See the Power-Up
Sequencing and ON/ OFF Controls section.
Low-Noise Analog Ground and Feedback Reference Point
2.5V Reference Voltage Output. Bypass to GND with 1μF (min).
Logic-control input that disables idle mode when high. Connect to GND for normal use.
Active-Low Timed Reset Output. RESET swings GND to V L . Goes high after a fixed
32,000 clock-cycle delay following power-up.
Feedback Input for the 5V SMPS. Regulates at FB5 = REF (approx. 2.5V) in adjustable
12
10
FB5
mode. FB5 is a dual-mode input that also selects the 5V fixed output voltage setting
when connected to GND. Connect FB5 to a resistor-divider for adjustable-output
mode.
13
14
11
12
CSL5
CSH5
Current-Sense Input for the 5V SMPS. Also serves as the feedback input in fixed-output
mode, and as the bootstrap supply input when the voltage on CSL5/V L is > 4.5V.
Current-Sense Input for the 5V SMPS. Current-limit level is 100mV referred to CSL5.
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相关代理商/技术参数 |
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| MAX1904EAI-TG074 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1904ETJ | 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 |
| MAX1904ETJ+ | 功能描述:DC/DC 开关控制器 500kHz Multi-Output Power-Supply Ctlr 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 |
| MAX1904ETJ+T | 功能描述:DC/DC 开关控制器 500kHz Multi-Output Power-Supply Ctlr 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 |
| MAX1904ETJ-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 |
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