参数资料
型号: MC34708VM
厂商: Freescale Semiconductor
文件页数: 53/159页
文件大小: 0K
描述: IC POWER MANAGEMENT 206MAPBGA
标准包装: 160
应用: 通用
电源电压: 1.8 V ~ 4.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 206-LFBGA
供应商设备封装: 206-MAPBGA(13x13)
包装: 托盘
Functional Block Description
7.5.4.5
SW3
SW3 is fully integrated synchronous Buck PWM voltage mode control DC/DC regulator.
BP
C INSW 3
SW3IN
I SENSE
SW3MODE
SW3
C OSW3
L SW3
SW3LX
D SW3
GNDSW3
Driver
Internal
Compensation
Controller
Z2
SPI
SW3FAULT
SPI
Interface
SW3FB
Z1
EA
DAC
V REF
Figure 11. SW3 Block Diagram
The peak current is sensed internally for over-current protection purposes. If an over-current condition is detected the regulator
will limit the current through cycle by cycle operation and alert the system through the SW3FAULT SPI bit and issue an SCPI
interrupt via the INT pin.
SW3 can be programmed in step sizes of 25 mV as shown in Table 41 .
Table 41. SW3 Output Voltage Programmability
Set Point
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SW3[4:0]
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
SW3 Output (V)
0.6500
0.6750
0.7000
0.7250
0.7500
0.7750
0.8000
0.8250
0.8500
0.8750
0.9000
0.9250
0.9500
0.9750
1.0000
1.0250
Set Point
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
SW3[4:0]
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
SW3 Output (V)
1.0500
1.0750
1.1000
1.1250
1.1500
1.1750
1.2000
1.2250
1.2500
1.2750
1.3000
1.3250
1.3500
1.3750
1.4000
1.4250
MC34708
Analog Integrated Circuit Device Data ?
53
Freescale Semiconductor
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