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参数资料
| 型号： | MC33997DW |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 3.3/5V SUPPLY 24-SOIC |
| 标准包装： | 30 |
| 应用： | 切换电源，微处理器 |
| 输入电压： | 6 V ~ 26.5 V |
| 输出数： | 5 |
| 输出电压： | 3.3V，5V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 管件 |
PIN CONNECTIONS
PIN CONNECTIONS
VKAMOK
KA_VPWR
CRES
VPWR
GND
GND
GND
GND
VSW
PWROK
FBKB
VSUM
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VKAM
EN
SNSEN
VREF1
GND
GND
GND
GND
VREF2
VDDH
FBL
DRVL
Figure 3. 33997 Pin Connections
Table 1. 33997 Pin Function Definition
Pin Number
1
2
3
4
5–8
9
10
11
12
13
14
15
16
17 – 20
21
22
Pin Name
VKAMOK
KA_VPRW
CRES
VPWR
GND
VSW
PWROK
FBKB
VSUM
DRVL
FBL
VDDH
VFREF2
GND
VREF1
SNSEN
Definition
Keep-Alive Output Monitoring. This pin is an "open-drain" output that will be used with a discrete pull-up resistor
to VKAM. When the supply voltage to the 33997 is disconnected or lost, the VKAMOK signal goes low.
Keep Alive Power Supply Pin. This supply pin is used in modules that have both direct battery connections and
ignition switch activated connections.
Reservoir Capacitor. This pin is tied to an external "reservoir capacitor" for the internal charge pump.
Power Supply Pin. Main power input to the IC. This pin is directly connected to the switching regulator power
MOSFET. In automotive applications this pin must be protected against reverse battery conditions by an
external diode.
Ground of the integrated circuit.
Internal P-Channel Power MOSFET Drain. VSW is the "switching node" of the voltage buck converter. This pin
is connected to the VPWR pin by an integrated p-channel MOSFET.
Power OK Reset Pin. This pin is an "open-drain" output that will be used with a discrete pull-up resistor to V KAM ,
V DDH , or V DDL . When either V DDH or V DDL output voltage goes out of the regulation limits this pin is pulled
down.
Step-Down Switching Regulator Feedback Pin. The FBKB pin is the V DDH feedback signal for the switching
regulator.
Error Amplifier "Summing Node". The VSUM pin is connected to the inverting input of the error amplifier. This
node is also the "common" point of the integrated feedback resistor divider.
Drive for V DDL (3.3 V) Regulator. The DRVL pin drives the base of an external NPN pass transistor for the V DDL
linear post regulator. The collector of the VDDL pass transistor is connected to V DDH . An example of a suitable
pass transistor is BCP68.
Feedback for V DDL (3.3 V) Regulator. The FBL pin is the voltage feedback sense signal from the V DDL (3.3 V)
linear post regulator.
VDDH is an input supply pin providing power for the buffered sensor supplies and the drive circuitry for the 3.3 V
linear power regulator. The VDDH pin is supplied from the switching regulator output, capable of providing
5.0 V @ 1400 mA total output current.
Sensor Supply #2 Output. The VFREF2 pin is sensor supply output #2.
Ground of the integrated circuit.
Sensor Supply #1 Output. The VREF1 pin is sensor supply output #1.
Sensor Supply Enable Input. The SNSEN pin is an input, which enables the V REF1 and V REF2 supplies. It
allows the control module hardware / software to shut down the sensor supplies.
33997
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
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相关代理商/技术参数 |
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| MC33997DWR2 | 制造商:Rochester Electronics LLC 功能描述:MLPS 3.3 IC - Bulk |
| MC33999EK | 功能描述:多路器开关 IC 16 LOW SIDE PWM&SPI RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MC33999EK | 制造商:Freescale Semiconductor 功能描述:IC SWITCH 16 OUT SPI/PWM 54SOIC |
| MC33999EKR2 | 功能描述:多路器开关 IC 16 LOW SIDE PWM&SPI RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MC3399DW | 制造商: 功能描述: 制造商:undefined 功能描述: |
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