MIC4574-3.3YN Micrel Inc, MIC4574-3.3YN Datasheet - Page 2

• Manufacturer Part Number: MIC4574-3.3YN
• Description: 200kHz 0.5A Step-down Regulator ( )
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of MIC4574-3.3YN

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 500mA
• Frequency - Switching: 200kHz
• Voltage - Input: 4 ~ 24 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-2338; MIC4574-3.3YN

MIC4574
Ordering Information
Pin Configuration
Pin Description
M9999-062105
Pin Number
6, 8
1
2
3
4
5
7
Standard
MIC4574-3.3BN
MIC4574-5.0BN
MIC4574BN
Pin Name
SGND
PGND
SHDN
VIN
SW
NC
FB
Part Number
Pb-Free
MIC4574-3.3YN
MIC4574-5.0YN
MIC4574YN
SGND
SHDN
PGND
FB
Pin Function
Feedback (Input): Output voltage feedback to regulator. Connect to output
of supply for fixed versions. Connect to 1.23V tap of resistive divider for
adjustable versions.
Signal Ground.
Shutdown (Input): Logic low enables regulator. Logic high (> 2.4V) shuts
down regulator.
Power Ground.
Supply Voltage (Input): Unregulated +4V to +24V supply voltage.
Switch (Output): Emitter of NPN output switch. Connect to external storage
inductor and Shottky diode.
Not internally connected. Solder to printed circuit for maximum heat transfer.
1
2
3
4
8-Pin DIP (N)
2
Adjustable
Voltage
3.3V
5.0V
8
7
6
5
NC
SW
NC
V
IN
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Temperature
Range
8-pin DIP
8-pin DIP
8-pin DIP
Package
Micrel, Inc.
June 2005