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参数资料
| 型号： | MC33998 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Switching Power Supply with Linear Regulators(带线性稳压器的开关电源) |
| 中文描述： | 开关电源与线性稳压器（带线性稳压器的开关电源） |
| 文件页数： | 15/20页 |
| 文件大小： | 437K |
| 代理商： | MC33998 |
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33998
15
APPLICATIONS
Figure 8. 33998 Application Circuit Schematic Diagram
Table 1. Recommended Components
Designator
Value
/
Rating
Description
/
Part No.
Manufacturer
(Note 16)
Cf1
10 μF/50 V
Aluminum Electrolytic/UUB1H100MNR
Nichicon
Cf2, C2
1.0 μF/50 V
Ceramic X7R/C1812C105K5RACTR
Kemet
C1
100 μF/50 V
Aluminum Electrolytic/UUH1V101MNR
Nichicon
C3 (Note 15)
68 μF/10 V
Tantalum/T494D686M010AS
Kemet
C6
68 μF/10 V
Tantalum/T494D686M010AS
Kemet
C7
4.7 μF/10 V
Tantalum/T494A475M010AS
Kemet
C4, C5
100 nF/16 V
Ceramic X7R
Any Manufacturer
C8 (Optional)
390 pF/50 V
Ceramic X7R
Any Manufacturer
C9
22 nF/25 V
Ceramic X7R
Any Manufacturer
Notes
15.
It is possible to use ceramic capacitors in the switcher output, e.g. C3 = 2 x 22 μF/6.3 V X7R ceramic. In this case the compensation resistor
has to be changed to Rc1 = 200
to stabilize the switching regulator operation.
Motorola does not assume liability, endorse, or warrant components from external manufacturers that are referenced in circuit drawings or
tables. While Motorola offers component recommendations in this configuration, it is the customer’s responsibility to validate their application.
16.
Note
The V
DDH
total output current is 1.4 A. This includes the current used by the linear regulator V
DDL
and buffered outputs V
REF1
and
V
REF2
.
SNSEN
VPWR
KA_VPWR
GND
33998
EN
VSW
VDDH
DRVL
FBL
PWROK
VKAM
VKAMOK
Vbg
VREF1
VREF2
I-lim
Ramp
Osc
Soft
Start
Logic
&
Latch
PwrOK
VkamOK
POR
2.6V
Linear
Regulator
Driver
2.6V
Standby
Reg.
Bandgap
Voltage
Reference
Charge
Pump
VREF1
Reg.
VREF2
Reg.
Vbg
Vbg
CRES
VSUM
12
FBKB
Enable
Control
Enb
Snsenb
Snsenb
Snsenb
Enb
Enb
Enb
Retry
Retry
Drive
C9
22nF
Cs1
33nF
Lf1
C2
1.0uF
100uF
C1
Cf2
1.0uF
10uF
Cf1
Cs2
33nF
C6
68uF
100nF
C5
10C4
68uF
C3
L1
C7
4.7uF
R1
R2
Q1
Rc1
3.6k
Cc1
2.2nF
D1
Dp1
Dp2
9
11
15
13
14
24
1
10
175-8
22
23
3
16
21
2
4
VDDL= 2.6V
@ 400mA
VKAM= 2.6V
@ 10mA
VDDH= 5.0V
@ 1400mA total
390pF
R3
Optional
Snubber
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
n
.
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相关代理商/技术参数 |
参数描述 |
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| 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: |
| MC340 | 制造商:Motorola Inc 功能描述:Bipolar Junction Transistor, NPN Type, TO-126 |
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