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参数资料
| 型号： | MAX1798EGP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/19页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY CDMA 20-QFN |
| 标准包装： | 2,500 |
| 应用： | 手机，CDMA 手持话机 |
| 电流 - 电源： | 367µA |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-QFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN/MLP 裸露焊盘（5x5） |
| 包装： | 带卷 (TR) |
CDMA Cellular/PCS System
Power Supplies
A
t LOW
B
t HIGH
C
D
E
F
G
H
I
J
K
L
M
SCL
SDA
t SU:STA t HD:STA
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
t SU:DAT
t HD:DAT
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO SLAVE (OP/SUS BIT)
H = LSB OF DATA CLOCKED INTO SLAVE
I = SLAVE PULLS SMBDATA LINE LOW
t SU:STO t BUF
J = ACKNOWLEDGE CLOCKED INTO MASTER
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
E = SLAVE PULLS SMBDATA LINE LOW
Figure 2. I 2 C-Compatible Serial-Interface Timing Diagram
ON
(INPUT)
OUT1
140ms min
140ms min
RSO
(OUTPUT)
35ms max
10 μ s min
35ms max
52ms typ
OFF
(INPUT)
ONO
(OUTPUT)
35ms max
PULSED HIGH
OR CONTINUOUS HIGH
Figure 3. Push-On/Push-Off Startup and Shutdown Timing Diagram
watchdog timers time out, the shutdown timer is reset.
The shutdown timer requires continuous low RSO signal
and continuous nontriggered watchdog timer to shut
down the regulators.
ON and OFF Logic
See Figure 3. The MAX1798/MAX1798A/MAX1799/
MAX1799A power up when V IN1 is greater than 2.5V
and ON is low ( ON button is pressed down momentari-
ly). When ON returns high, the device remains on. It
turns on OUT1 and the serial interface port. Once
OUT1 is in regulation, RSO stays low an additional
140ms (min). At this time, OUT1 is on and set to 2.98V,
while OUT2–5 are disabled and set to 2.98V. To stay
on, the OFF pin must be in a high state within 35ms
(min) or the device will shut down and can only be
turned on by pressing the ON button. While ON is held
low, the status of OFF is irrelevant and OUT1 and the
serial port are on.
After initial power-up, the logic level of ONO follows the
logic level of ON but is level-shifted to OUT1 high volt-
age. This signal can be used to interrupt the system
controller, which can subsequently manage an orderly
shutdown through the serial port by turning off OUT1.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1798EUP | 功能描述:PMIC 解决方案 CDMA Cellular/PCS System Power Supply RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX1798EUP+ | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1798EUP-T | 功能描述:PMIC 解决方案 CDMA Cellular/PCS System Power Supply RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX1799AEGP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1799AEUP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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