參數(shù)資料
型號: MC34701R2
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: 1.5 A Switch-Mode Power Supply with Linear Regulator
中文描述: 1.5開關(guān)模式電源,線性穩(wěn)壓器
文件頁數(shù): 32/38頁
文件大小: 739K
代理商: MC34701R2
Analog Integrated Circuit Device Data
Freescale Semiconductor
32
34701
TYPICAL APPLICATION
Figure 33. Simplified Block Diagram and Basic Application
100 uF
Logic
+
-
-
Limit
Limit
Amp.
Comp.
UVLO
VBST
VDDI
SW
FREQ
Down
Control
Timer
LFB
SysCon
INV
EN2
GND
0.8V
R
b
(2)
EN1
SoftSt
CLKSYN
VIN2
Driver
VBST
+
-
Vref
Vref
Enable
8.0V
VBST
Control
VBD
10uF
VDDI
LDRV
Vref
LFB
CS
LDO
RT
RST
+3.3V
Supply
Voltage
VDDI
0.022 R
SDA
SCL
Ct
PGND
Reset
R
F
4.7 uH
10uH
VIN1
VIN
BOOT
CLKSEL
VOUT
Power
C
B
LCMP
VBST
L1
C
C
IN
Vref
VDDI
Q2
Q1
(2)
(2)
(4)
ADDR
I
2
C
Interface
Rt
I
2
C
Control
I
2
C
Control
5 x 2.2 uF
C
BST
D
B
Q
LDO
L
BST
0.1uF
VDDI
10k
Supply
VDDI
Reference
Sequencing
Voltage Margining
W-dog Timer
VBST
Gen.
VOUT
Control
Seq.
300kHz
10uF
VBST
Control
I-lim
VOUT
100pF
1.5k
2 x 22 uF
6.8nF
470pF
39k
300k
27k
300
(Optional)
5.1k
100k
100nF
1.0 uF
Pow. Seq.
4.7k
1.5k
Q3
Q4
+
Control
Buck
+
Thermal
Current
Error
PWM
Reset
POR
SysCon
INV
LS
Buck
HS
&
Power
Boost
R
VLDO
C
LDO
R
pd
VDDI
Internal
Bandgap
Voltage
Power
Ramp
To Reset
Pow.
Switcher
Oscillator
C
IN
Regulator
Linear
7.75V
RST
+3.3V
Supply
Voltage
VOUT=1.8V
VLDO=3.3V
@1.0A
+3.3V
or
VLDO
to MCU
Q5
Q6
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