Micrel, Inc.
MIC5159
June 2006
22
M9999-062706
Schematic K
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 10A
3.3V 1.8V 5A
3.3V 1.5V 4.25A
3.3V 1.25V 3.75A
2.5V 1.8V 11A
2.5V 1.5V 8A
2.5V 1.25V 6A
1.8V 1.5V 7A
1.8V 1.25V 13A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0 2.5 5 7.5 10 12.5 15
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit SUB15P01-52 x4 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
C2, C3 GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 2
C3225X5R1A226M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
R2 CRCW08059761 Vishay Dale
Output Voltage:2.5V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1, Q2
Q3, Q4
SUB15P01-52 Vishay Siliconix
(5)
P-Channel MOSFET TO-263 4
U1
MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
−
=
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
