MCZ34670EG Freescale Semiconductor, MCZ34670EG Datasheet - Page 3

• Manufacturer Part Number: MCZ34670EG
• Description: IC POE CURR MODE SW REG 20-SOIC
• Manufacturer: Freescale Semiconductor
• Type: Power Over Ethernet Controller (PoE)r

Specifications of MCZ34670EG

• Applications: Remote Peripherals (Industrial Controls, Cameras, Data Access)
• Internal Switch(s): No
• Voltage - Supply: 60V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Product: PoE / LAN Solutions
• Supply Voltage (max): 80 V
• Supply Voltage (min): - 0.3 V
• Power Dissipation: 800 mW
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Supply Current: 18 mA
• Output Current: 2.1A
• Digital Ic Case Style: SOIC
• No. Of Pins: 20
• Duty Cycle (%): 48%
• Uvlo: 2V
• Frequency: 400kHz
• Msl: MSL 3 - 168 Hours
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. 34670 Pin Definitions
Analog Integrated Circuit Device Data
Freescale Semiconductor
Pin Number
11, 12
1, 2
10
13
14
15
16
17
18
19
20
3
4
5
6
7
8
9
Pin Name
RESET
VPWR
TEST1
TEST2
COMP
RCLA
UVLO
FREQ
VOUT
VOUT
GATE
VDD
ILIM
VIN
VIN
SS
CS
FB
Negative Supply Voltage
Frequency Adjustment
Classification Resistor
Undervoltage Lookout
Inrush Current Limit
Gate Driver Output
Compensation Pin
Feedback Input
Positive Supply
Output Voltage
Output Voltage
RESET Output
Soft Start Input
Current Sense
Formal Name
Voltage Input
(active low)
V
Test pins
DD
Output
Figure 3. 34670 Pin Connections
TEST1
TEST2
VPWR
VPWR
UVLO
FREQ
RCLA
ILIM
VIN
VIN
PIN CONNECTIONS
This is the most positive power supply input. The load connects between this pin
and the V
Connect a resistor between RCLA and V
Used to adjust the undervoltage lookout threshold voltage, connected to V
the default threshold voltage.
Connect to V
Adjusts the internal oscillator frequency by connecting a resistor between FREQ
and V
Used to adjust the inrush current limit of the isolation switch, add a resistor
between ILIM and V
This is the most negative power supply input.
This pin is the drain of the internal Power MOSFET (high current path).
This pin is the drain of the internal Power MOSFET (low current path).
This is an active-low RESET output signal. This pin is referenced to V
Connect an external capacitor to SS. The internal current source charges the
capacitor and generates a soft-start ramp.
COMP is the output of the error amplifier and is available for feedback
compensation. COMP is pulled-up by an internal 5.0 kΩ resistor to 5.0 V.
This is the inverting input of the error amplifier. In non-isolated applications it’s
connected to the secondary output through a resistor divider.
The current sense pin CS senses a voltage that is proportional to the current
through the sense resistor.
GATE drives the gate of the external power MOSFET. GATE sources and sinks
up to 1.0 A.
V
from V
DD
10
1
2
3
4
5
6
7
8
9
mainly supplies the gate of the external power MOSFET. Connect a capacitor
IN
DD
.
OUT
to V
IN
pin.
OUT
in application mode.
18
16
15
13
20
19
17
14
12
11
.
IN
.
VDD
GATE
CS
FB
COMP
SS
RESET
VOUT
VOUT
VOUT
Definition
IN
to select the class of the PD.
PIN CONNECTIONS
OUT
IN
.
to use
34670
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