MIC4684BM Micrel Inc, MIC4684BM Datasheet - Page 8

• Manufacturer Part Number: MIC4684BM
• Description: IC REG BUCK 2A ADJ VOLT HE 8SOIC
• Manufacturer: Micrel Inc
• Series: SuperSwitcher™r
• Type: Step-Down (Buck)r

Specifications of MIC4684BM

• Mounting Type: Surface Mount
• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 1.235V
• Current - Output: 2A
• Frequency - Switching: 200kHz
• Voltage - Input: 4 ~ 30 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Current Rating: 2A
• Output Voltage Max: 1.235V
• Supply Voltage Max: 30V
• Leaded Process Compatible: No
• Voltage Regulator Type: Switching
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Lead free / RoHS Compliant

Micrel, Inc.
Functional Characteristics
Frequency Foldback
The MIC4684 folds the switching frequency back during a hard short
circuit condition to reduce the energy per cycle and protect the device.
January 2010
Switching Frequency Foldback
200kHz
70kHz
TIME
Normal
Operation
Short
Circuit
Operation
8
V
V
I
OUT
IN
OUT
= 12V
= 1.0A to 0.1A
= 5V
Load Transient
TIME (100ms/div.)
M9999-012610
MIC4684
5.1V
5V
1A
0A