MIC4680-3.3BM Micrel Inc, MIC4680-3.3BM Datasheet - Page 8

• Manufacturer Part Number: MIC4680-3.3BM
• Description: IC REG BUCK 1A 3.3V 8SOIC
• Manufacturer: Micrel Inc
• Series: SuperSwitcher™r
• Type: Step-Down (Buck)r

Specifications of MIC4680-3.3BM

• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 1A
• Frequency - Switching: 200kHz
• Voltage - Input: 4 ~ 34 V
• Operating Temperature: -40°C ~ 125°C
• Output Current: 1.3A
• Output Voltage: 3.3VDC
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• 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

Functional Diagrams
Micrel, Inc.
March 2008
SHDN
SHDN
MIC4680 [adj.]
MIC4680-x.x
Oscillator
200kHz
Oscillator
200kHz
parator
Com-
parator
Adjustable Regulator
Com-
Error
Amp
Fixed Regulator
Error
Amp
Shutdown
Regulator
Thermal
Internal
Reset
Shutdown
Regulator
Thermal
Internal
Reset
8
GND
1.23V
Bandgap
Reference
1.23V
Bandgap
Reference
Current
Driver
Limit
Current
Driver
Limit
Switch
IN
1A
Switch
V
IN
1A
IN
V
IN
SW
FB
SW
FB
R1 R2
V
V
REF
OUT
=
=
=
1.23V
V
⎛
⎜
⎝
REF
V
V
OUT
REF
⎛
⎜
⎝
R2
R1
-
1
⎞
⎟
⎠
+
1
⎞
⎟
⎠
R1
R2
M9999-032808
V
C
MIC4680
OUT
OUT
V
C
OUT
OUT