MCZ34702EWR2 Freescale Semiconductor, MCZ34702EWR2 Datasheet - Page 3

• 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

Table 1.
Analog Integrated Circuit Device Data
Freescale Semiconductor
24, 25
10, 11
A functional description of each pin can be found in the
4, 5
6, 7
8, 9
Pin
12
13
14
15
16
17
18
19
1
2
3
Pin Function Description
Pin Name
FREQ
VOUT
PGND
BOOT
LCMP
VBST
VIN2
GND
VBD
SDA
LDO
SCL
LFB
INV
SW
Linear Compensation
Oscillator Frequency
Linear Feedback
Linear Regulator
Output Voltage
Input Voltage 2
Formal Name
Inverting Input
Power Ground
Boost Voltage
Serial Clock
Boost Drain
Serial Data
Bootstrap
Ground
Switch
V
PGND
PGND
BOOT
FREQ
VBST
V
V
OUT
GND
GND
VBD
SDA
SCL
INV
IN2
IN2
SW
SW
PIN CONNECTIONS
Figure 3. Pin Connections
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
This switcher frequency selection pin can be adjusted by connecting external
resistor R
tied to V
Buck controller error amplifier inverting input.
Output voltage of the buck converter. Input pin of the switching regulator power
sequence control circuit.
Buck regulator power input. Drain of the high side power MOSFET.
Buck regulator switching node. This pin is connected to the inductor.
Analog ground of the IC, thermal heatsinking.
Buck regulator power ground.
Drain of the internal boost regulator power MOSFET.
Internal boost regulator output voltage. The internal boost regulator provides a 20mA
output current to supply the drive circuits for the integrated power MOSFETs and the
external N-channel power MOSFET of the linear regulator. The voltage at the V
pin is 7.75V nominal.
Bootstrap capacitor input.
I
I
Linear regulator compensation pin.
Linear regulator feedback pin.
Input pin of the linear regulator power sequence control circuit.
2
2
C bus pin. Serial data.
C bus pin. Serial clock.
Functional Pin Description
DDI
F
to the FREQ pin. The default switching frequency (FREQ pin left open or
) is set to 300kHz.
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
CLKSYN
CLKSEL
RST
RT
EN2
EN1
ADDR
GND
GND
V
V
LDRV
CS
LDO
LFB
LCMP
DD1
IN1
Definition
section beginning on
page
PIN CONNECTIONS
16.
BST
34702
3