MIC2571_02 Datasheet, PDF (9/12 Pages) Micrel Semiconductor – Single-Cell Switching Regulator

MIC2571
Application Examples
1V to 1.5V
1 Cell
C1*
47µF
16V
L1
150µH
8
IN
1
SW
MIC2571
4
5V
SYNC GND
7
2
D1
MBR0530
V_OUT
5V/5mA
C2
47µF
16V
* Needed if battery is more than 4" away from MIC2571
U1 Micrel
C1 Sprague
C2 Sprague
D1 Motorola
L1 Coilcraft
MIC2571-1BMM
594D476X0016C2T Tantalum ESR = 0.11Ω
594D476X0016C2T Tantalum ESR = 0.11Ω
MBR0530T1
DO1608C-154 DCR = 1.7Ω
Example 1. 5V/5mA Regulator
1997
1V to 1.5V
1 Cell
C1*
47µF
16V
L1
150µH
8
IN
1
SW
MIC2571
5
3.3V
SYNC GND
7
2
D1
MBR0530
V_OUT
3.3V/8mA
C2
47µF
16V
* Needed if battery is more than 4" away from MIC2571
U1 Micrel
C1 Sprague
C2 Sprague
D1 Motorola
L1 Coilcraft
MIC2571-1BMM
594D476X0016C2T Tantalum ESR = 0.11Ω
594D476X0016C2T Tantalum ESR = 0.11Ω
MBR0530T1
DO1608C-154 DCR = 1.7Ω
Example 2. 3.3V/8mA Regulator
L1
D1
1.0V to 1.5V
1 Cell
C1*
47µF
16V
150µH
8
IN
1
SW
MIC2571
FB ⁶
SYNC GND
7
2
MBR0530
R2
1M
1%
R1
20k
1%
* Needed if battery is more than 4" away from MIC2571
V_OUT = 0.22V (1 + R2/R1)
U1 Micrel
C1 Sprague
C2 Sprague
D1 Motorola
L1 Coilcraft
MIC2570-2BMM
594D476X0016C2T Tantalum ESR = 0.11Ω
594D156X0025C2T Tantalum ESR = 0.22Ω
MBRA0530T1
DO1608C-154 DCR = 1.7Ω
Example 3. 12V/40mA Regulator
V_OUT
12V/2mA
C2
15µF
25V
9
Micrel
MIC2571