MC34704AEP Freescale Semiconductor, MC34704AEP Datasheet - Page 4

• Manufacturer Part Number: MC34704AEP
• Description: IC POWER MANAGEMENT 56-QFN
• Manufacturer: Freescale Semiconductor

Specifications of MC34704AEP

• Applications: Processor
• Current - Supply: 86mA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-QFN
• Output Voltage: 5 V
• Input Voltage: 2.7 V to 5.5 V
• Switching Frequency: 750 KHz to 2 MHz
• Mounting Style: SMD/SMT
• Number Of Outputs: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 2. 34704 Pin Definitions
4
34704
PIN CONNECTIONS
Pin Number Device Pin Name Pin Function
COMP4
VOUT4
VOUT3
A functional description of each pin can be found in the Functional Pin Description section beginning on
PVIN4
SW4D
SW4U
PVIN3
BT5U
BT4D
BT4U
SW3
10
FB4
BT3
FB3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
56 55 54 53 52 51 50 49 48 47 46 45 44 43
15 16 17 18 19 20 21 22 23 24 25 26 27 28
A/B
A/B
A/B
A/B
A/B
A/B
A/B
A/B
A/B
A/B
57
COMP4
VOUT4
PVIN4
SW4D
SW4U
BT5U
BT4D
BT4U
FB4
BT3
Exposed Pad
34704A
PGND
Input/Output
Input/Output
Passive
Passive
Passive
Passive
Passive
Output
Power
Input
REG5 Boost Stage
bootstrap capacitor input
pin
REG4 Buck Stage
bootstrap capacitor input
pin
REG4 power supply input
voltage
REG4 Buck Stage
switching node
REG4 regulated output
voltage pin
REG4 Boost Stage
switching node
REG4 Boost Stage
bootstrap capacitor input
pin
REG4 voltage feedback
input for voltage
regulation/programming
REG4 compensation
network connection
REG3 bootstrap capacitor
input pin
Figure 3. 34704 Pin Connections
42
41
40
39
38
37
36
35
34
33
32
31
30
29
PIN CONNECTIONS
Formal Name
BT2U
ONOFF
LION
VDDI
VIN
AGND
VOUT6
SW6
BT6
FB6
VOUT7
DRV7
FB7
VREF7
COMP4
VOUT4
VOUT3
PVIN4
SW4D
SW4U
PVIN3
Connect a 1.0 μF capacitor between this pin and SW5U pin to
enhance the gate of the Switch Power MOSFET.
Connect a 0.01 μF capacitor between this pin and SW4D pin to
enhance the gate of the Switch Power MOSFET.
This is the connection to the drain of the high side switch FET.
Input decoupling /filtering is required for proper REG4 operation.
Use a 10uf decoupling capacitor for better performance.
The inductor is connected between this pin and the SW4U pin.
Connect this pin to the load and to the output filter as close to
the pin as possible.
The inductor is connected between this pin and the SW4D pin.
Connect a 0.01 μF capacitor between this pin and SW4U pin to
enhance the gate of the Switch Power MOSFET.
Connect the feedback resistor divider to this pin.
REG4 compensation network connection.
Connect a 0.01 μF capacitor between this pin and SW3 pin to
enhance the gate of the Switch Power MOSFET.
BT5U
BT4D
BT4U
SW3
FB4
BT3
FB3
10
11
12
13
14
1
2
3
4
5
6
7
8
9
15 16 17 18 19 20 21 22 23 24 25 26 27 28
56 55 54 53 52 51 50 49 48 47 46 45 44 43
57
Analog Integrated Circuit Device Data
Exposed Pad
Definition
34704B
PGND
Freescale Semiconductor
page
17.
42
41
40
39
38
37
36
35
34
33
32
31
30
29
BT2U
ONOFF
LION
VDDI
VIN
AGND
PGND5
PGND4
NC4
AGND3
PGND2
NC3
AGND1
NC2