参数资料
型号: MC34708VM
厂商: Freescale Semiconductor
文件页数: 50/159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
Table 38. SW1A/B Electrical Specification
Characteristics noted under conditions BP = 3.6 V, V BUS = 5.0 V, - 40 ? C ? T A ? 85 ? C, unless otherwise noted. Typical values
at BP = 3.6 V and T A = 25 °C under nominal conditions, unless otherwise noted.
Symbol
Characteristic
Min
Typ
Max
Unit
Notes
t ON-SW1
Turn-on Time
μs
f SW1
I SW1Q
? Enable to 90% of end value IL = 0
Switching Frequency
? PLLX = 0
? PLLX = 1
Quiescent Current Consumption
? APS MODE, IL=0 mA
? PFM MODE, IL=0 mA
-
-
-
-
-
-
2.0
4.0
240
15
500
-
-
-
-
MHz
μA
? SW1
Efficiency,
%
? PFM, 0.9 V, 1.0 mA
? PWM, 1.1 V, 200 mA
? PWM, 1.1 V, 800 mA
? PWM, 1.1 V, 1600 mA
-
-
-
-
54
75
81
76
-
-
-
-
Notes:
47. Transient loading for load steps of ILMAX/2.
48. Efficiency numbers at V IN = 3.6 V, excludes the quiescent current
7.5.4.4
SW2
SW2 is fully integrated synchronous Buck PWM voltage-mode control DC/DC regulator.
BP
C INSW 2
SW2IN
I SENSE
SW2MODE
SW2
L SW2
C OSW2
SW2LX
D SW 2
GNDSW2
Driver
Internal
Compensation
Controller
Z2
SPI
SW2FAULT
SPI
Interface
SW2FB
Z1
EA
DAC
V REF
Figure 10. SW2 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, alert the system through the SW2FAULT SPI bit, and issue an SCPI
interrupt via the INT pin
SW2 can be programmed in step sizes of 12.5 mV as shown in Table 39 .
MC34708
Analog Integrated Circuit Device Data ?
Freescale Semiconductor
50
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