參數(shù)資料
型號(hào): 33702
廠商: Motorola, Inc.
英文描述: 3.0 A Switch-Mode Power Supply with Linear Regulator
中文描述: 3.0開關(guān)模式電源,線性穩(wěn)壓器
文件頁數(shù): 22/24頁
文件大?。?/td> 841K
代理商: 33702
33702
22
Go to: www.freescale.com
APPLICATION INFORMATION
Figure 20. Simplified Block Diagram and Typical Application
50
μ
F
Logic
-
-
Limit
Limit
Amp.
Comp.
UVLO
VBST
V
VDDI
SW
FREQ
Down
Control
Timer
LFB
SysCon
INV
EN2
GND
0.8V
R
b
(2)
EN1
SoftSt
CLKSYN
Voltage
V
V
OUT
= 1.8 V
VIN2
Driver
VBST
V
+
-
Vref
Vref
Enable
8.0V
VBST
Control
VBD
V
10uF
10
F
VDDI
LDRV
Vref
LFB
CS
LDO
@ 1.0A
Supply
RT
RESET
to MCU
V
LDO
Supply
Voltage
VDDI
0.068 R
SDA
SCL
Ct
PGND
Reset
R
F
4.7
μ
H
10
μ
H
VIN1
VIN
IN
BOOT
CLKSEL
VOUT
Power
C
B
LCMP
VBST
L1
C
O
C
IN
Vref
VDDI
Q2
Q1
(2)
(2)
(4)
ADDR
I
2
I
2
C
Interface
Rt
I
C
I
2
Control
I
2
C
I
2
C
Control
5 x 2.2
μ
F
C
BST
D
B
Q
LDO
L
BST
0.1uF
μ
F
VDDI
10k
Supply
VDDI
Reference
Sequencing
Voltage Margining
W-dog Timer
VBST
Comp.
VOUT
Control
300kHz
10uF
10
F
VBST
V
Control
I-lim
I
V
V
VOUT
100pF
1.5k
2 x 10
μ
F
6.8nF
pF
k
k
k
(Optional)
5.1k
100k
100nF
1.0 uF
@ 3.0 A
PWR Seq.
k
k
Q3
Q4
Control
Buck
+
+
Thermal
Current
Error
PWM
Reset
POR
SysCon
INV
LS
Buck
HS
&
Power
Boost
V
LDO
V
= 2.5 V
+3.3V
RESET
+3.3V
R
VLDO
C
LDO
R
pd
VDDI
Internal
Bandgap
Voltage
Power
Slope
To Reset
PWR Seq.
Switcher
Oscillator
C
IN
Regulator
Linear
+3.3V
+3.3 V or
V
V
V
V
R
C
t
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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