- 您现在的位置：买卖IC网 > PDF目录359132 > MC33701 (飞思卡尔半导体(中国)有限公司) 1.5 A Switch-Mode Power Supply with Linear Regulator(1.5 A开关方式电源，带线性稳压器) PDF资料下载
参数资料
| 型号： | MC33701 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | 1.5 A Switch-Mode Power Supply with Linear Regulator(1.5 A开关方式电源，带线性稳压器) |
| 中文描述： | 1.5开关模式电源，线性稳压器（1.5 A的开关方式电源，带线性稳压器） |
| 文件页数： | 15/24页 |
| 文件大小： | 841K |
| 代理商： | MC33701 |
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33701
15
Figure 9. Watchdog Operation
Table 1. Watchdog Programming Command Byte
(as a 2nd Command Byte)
When the Window Watchdog function is selected, the timer
cannot be cleared during the Closed Window time, which is
50% of the total watchdog period. When the watchdog is
cleared, the timer is reset and starts a new time-out period. If
the watchdog is not cleared during the Open Window time, the
RESET
will become active (LOW) for a time determined by the
RC components of the RT timer plus 10 ms.
EN1 and EN2 Control Pins
These two pins permit positive logic control of the Enable
function and selection of the Power Sequencing mode
concurrently.
Table 2
depicts the EN1 and EN2 function and
Power Sequencing mode selection.
Both EN1 and EN2 pins have internal pull-down resistors
and both can withstand a short circuit to the supply voltage,
6.0 V.
Table 2. Operating Mode Selection
Power Sequencing Modes
The power sequencing of the two outputs of this power
supply IC is in compliance with the Motorola Power QUICC and
other 32-bit microprocessor requirements. When the input
voltage is applied, the switcher and linear regulator outputs
follow the supply rail voltage during power-up and power-down
in the limits given by the microcontroller power sequencing
specification, illustrated in
Figures 10
through
12
. There are two
possible power sequencing modes, Standard and Inverted, as
explained in more detail below. The third mode of operation is
Power Sequencing Disabled.
Figure 10. Standard Power Up/Down Sequence
in +3.3 V Supply System
Figure 11. Standard Power Up/Down Sequence
in +5.0 V Supply System
Address
Value
Action
0
1
1
0
0
0
0
0
1st Command
0
1
1
0
0
0
0
0
WD OFF
(Note 12)
0
1
1
0
1
0
0
0
WD 1280 ms
WinOFF
0
1
1
0
1
0
0
1
WD 320 ms
WinOFF
0
1
1
0
1
0
1
0
WD 80 ms
WinOFF
0
1
1
0
1
0
1
1
WD 20 ms
WinOFF
0
1
1
0
1
1
0
0
WD 1280 ms
WinON
0
1
1
0
1
1
0
1
WD 320 ms
WinON
0
1
1
0
1
1
1
0
WD 80 ms
WinON
0
1
1
0
1
1
1
1
WD 20 ms
WinON
Notes
12.
The Watchdog feature will be turned
ON automatically after receiving any
other valid command byte changing
watchdog time.
50% of Watchdog Period
Watchdog Period
Timing Selected via 1
2
C Bus – See Table 1
Watchdog Closed
No Watchdog Clear Allowed
Window Open
for Watchdog Clear
Window Open for Watchdog Clear
Watchdog Period
Timing Selected via I
2
C Bus – See Table 1
Window Watchdog
Time-Out Watchdog
EN1
EN2
Operating Mode
0
0
Regulators Disabled
0
1
Standard Power Sequencing
1
0
Inverted Power Sequencing
1
1
Regulators Enabled,
No Power Sequencing
V = 2.0 V
Max. Lead
V = 0.4 V
Max. Lag
V = 2.0 V
Max. Lead
Slope
1.0 V/ms
(typ.)
V Start-Up
3.3 V Input Supply (I/O Voltage)
1.8 V Core Voltage
V = 2.0 V
Max. Lead
V = 0.4 V
Max. Lag
V = 0.4 V
Max. Lag
V Start-Up
3.3 V I/O Voltage (V
LDO
)
1.8 V Core Voltage
(V
OUT
)
5.0 V Input Supply
V = 2.0 V
Max. Lead
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
n
.
相关PDF资料 |
PDF描述 |
|---|---|
| MC33702 | 3.0 A Switch-Mode Power Supply with Linear Regulator(3.0 A开关方式电源，带线性稳压器) |
| MC33742 | System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver(带增强型高速CAN收发器的系统基片) |
| MC33790 | Two-Channel Distributed System Interface (DSI) Physical Interface Device(2通道分布式系统接口（DSI）物理接口) |
| MC33793 | Distributed System Interface (DSI) Sensor Interface(分布式系统接口（DSI）传感器接口) |
| MC33794 | Electric Field Imaging Device(电场成像设备) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33720 | 制造商:PRIVATE LABEL 功能描述:AXIAL FAN, 254MM, 125VAC, 1A, Supply Voltage:125VAC, Flow Rate - Imperial:935cu. |
| MC33730EK | 功能描述:开关变换器、稳压器与控制器 SW MODE P/S W/ MULT REG RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MC33730EKR2 | 功能描述:开关变换器、稳压器与控制器 SW MODE P/S W/ MULT REG RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MC3373P | 制造商:Motorola Inc 功能描述: |
| MC33742DW | 功能描述:网络控制器与处理器 IC SBC-E-HS RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
发布紧急采购，3分钟左右您将得到回复。