MIC2570
Micrel
Ordering Information
Part Number
MIC2570-1BM
MIC2570-2BM
Temperature Range
–40°C to +85°C
–40°C to +85°C
Voltage
Selectable*
Adjustable
Frequency
20kHz
20kHz
Package
8-lead SOIC
8-lead SOIC
* Externally selectable for 2.85V, 3.3V, or 5V
Pin Configuration
MIC2570-1
SW
GND
NC
5V
1
2
3
4
8
7
6
5
IN
SYNC
2.85V
3.3V
SW
GND
NC
NC
1
2
3
4
MIC2570-2
8
7
6
5
IN
SYNC
FB
NC
Selectable Voltage
20kHz Frequency
Adjustable Voltage
20kHz Frequency
8-Lead SOIC (M)
Pin Description
Pin No. (Version
†
)
1
2
3
4 (-1)
4 (-2)
5 (-1)
5 (-2)
6 (-1)
6 (-2)
7
8
†
Pin Name
SW
GND
NC
5V
NC
3.3V
NC
2.85V
FB
SYNC
IN
Pin Function
Switch: NPN output switch transistor collector.
Power Ground: NPN output switch transistor emitter.
Not internally connected.
5V Feedback (Input): Fixed 5V feedback to internal resistive divider.
Not internally connected.
3.3V Feedback (Input): Fixed 3.3V feedback to internal resistive divider.
Not internally connected.
2.85V Feedback (Input): Fixed 2.85V feedback to internal resistive divider.
Feedback (Input): 0.22V feedback from external voltage divider network.
Synchronization (Input): Oscillator start timing. Oscillator synchronizes to
falling edge of sync signal.
Supply (Input): Positive supply voltage input.
4
Example: (-1) indicates the pin description is applicable to the MIC2570-1 only.
1997
4-63
MICREL [ MICREL SEMICONDUCTOR ]
