MCZ34702EWR2 Freescale Semiconductor, MCZ34702EWR2 Datasheet - Page 34

• Manufacturer Part Number: MCZ34702EWR2
• Description: IC PWR SUPPLY 3A SW 32-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ34702EWR2

• Applications: Controller, Power QUICC™ I, II
• Voltage - Input: 2.8 ~ 6 V
• Number Of Outputs: 2
• Voltage - Output: 7.75V, 0.8 ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-SOIC (7.5mm Width)
• Output Current: 3 A
• Input Voltage: 2.8 V to 6 V
• Switching Frequency: 300 KHz
• Mounting Style: SMD/SMT
• Duty Cycle (max): 95 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

34
34702
TYPICAL APPLICATIONS
+3.3V
Supply
Voltage
to MCU
RST
100k
100k
5.1k
5.1k
+3.3V
or
VLDO
Rt
Rt
10k
10k
R
R
pd
pd
10uF
10uF
10uF
10uF
C
C
C
C
10uH
10uH
L
L
IN
IN
BST
BST
BST
BST
Ct
Ct
ADDR
ADDR
RST
RESET
RESET
VBST
VBST
100nF
100nF
SDA
SDA
SCL
SCL
VIN1
VIN1
VBD
VBD
RT
RT
EN1
EN1
EN2
EN2
Q6
7.75V
Q5
8.0V
8.0V
CLKSEL
CLKSEL
Interface
Interface
Control
Control
I
I
I
I
2
2
2
2
C
C
Control
Control
Control
Control
Control
C
C
Figure 33. Simplified Block Diagram and Basic Application
Boost
Boost
Boost
Reset
Reset
Timer
Timer
POR
POR
VIN
VIN
CLKSYN
CLKSYN
Oscillator
Oscillator
Switcher
Switcher
300kHz
300kHz
INV
INV
LFB
LFB
Vref
Vref
Vref
Vref
SysCon
SysCon
Thermal
Thermal
Vref
Vref
Limit
Limit
Reset
Reset
+
+
+
-
-
-
(Optional)
(Optional)
FREQ
FREQ
R
R
F
F
Reference
Reference
VBST
VBST
Bandgap
Bandgap
Voltage
Voltage
VDDI
VDDI
Enable
Enable
Power
Power
Voltage Margining
Voltage Margining
Ramp
Ramp
Ramp
Gen.
Gen.
Gen.
Control
Control
W-dog Timer
W-dog Timer
Sequencing
Sequencing
SoftSt
SoftSt
I
I
SysCon
SysCon
2
2
Power
Power
C
C
VDDI
VDDI
Comp.
Comp.
PWM
PWM
Internal
Internal
Supply
Supply
VDDI
VDDI
(4)
(4)
GND
GND
Control
Control
Control
VDDI
VDDI
Logic
Logic
Logic
+
+
+
Buck
Buck
Buck
-
-
-
VLDO
VLDO
VOUT
VOUT
Current
Current
Power
Power
Vref
Vref
Down
Down
VDDI
VDDI
Limit
Limit
VDDI
VDDI
Error
Error
Amp.
Amp.
Pow. Seq.
Pow. Seq.
Regulator
Regulator
Regulator
Control
Control
Control
UVLO
UVLO
Linear
Linear
Linear
VBST
VBST
Pow.
Pow.
+
+
+
Seq.
Seq.
-
-
-
I-lim
I-lim
I-lim
VBST
VBST
Driver
Driver
Driver
Buck
Buck
Buck
HS
HS
HS
LS
LS
LS
0.8V
0.8V
&
&
&
VOUT
VOUT
To Reset
To Reset
Control
Control
VBST
VBST
Q4
Q4
Q3
Q3
Q1
Q1
Q2
Q2
100pF
100pF
LCMP
LCMP
VDDI
VDDI
BOOT
BOOT
(2)
(2)
(2)
(2)
LDO
LDO
LFB
LFB
CS
CS
2 x 22 uF
2 x 22 uF
LDRV
LDRV
(2)
(2)
VIN2
VIN2
INV
INV
VOUT
VOUT
SW
SW
PGND
PGND
C
C
1.5k
1.5k
IN
IN
1.0 uF
1.0 uF
4.7k
4.7k
27k
27k
Analog Integrated Circuit Device Data
1.5k
1.5k
6.8nF
6.8nF
C
C
B
B
R
R
0.022 R
0.022 R
S
S
Q
Q
R
R
LDO
LDO
b
b
0.1uF
0.1uF
300k
300k
D
D
B
B
C
C
5 x 2.2 uF
5 x 2.2 uF
+3.3V
Supply
Voltage
LDO
LDO
300
300
VLDO=3.3V
Freescale Semiconductor
4.7 uH
4.7 uH
39k
39k
VBST
VBST
L1
L1
470pF
470pF
@1.0A
VOUT=1.8V
+
+ +
100 uF
100 uF
C
C
O
O