Micrel, Inc.
MIC5159
June 2006
13
M9999-062706
Schematic B
Input/Output Combination Examples
Input Output Maximum Current
1.8V 1.5V 4A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0123456
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si3445DV x2 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1 C1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 1 C2
C2012X5RR0J106M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
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
R2
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 Si3445DV Vishay Siliconix
(5)
P-Channel MOSFET TSOP-6 2
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
