Micrel, Inc.
MIC5159
June 2006
17
M9999-062706
Schematic F
Input/Output Combination Examples
Input
Output
Maximum Current
3.3V
2.5V
5A
3.3V
1.8V
2.5A
3.3V
1.5V
2A
3.3V
1.25V
1.75A
2.5V
1.8V
5.5A
2.5V
1.5V
4A
2.5V
1.25V
3A
1.8V
1.25V
6.5A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0
2
4
6
8
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60癈 T
A
Application Circuit
Si34433DY x4 SOA
Bill of Materials
Item
Part Number
Manufacturer
Description
Qty.
GRM40 X7R 106 6.3
Murata
(1)
10礔, 6.3V Ceramic MLCC, Size 0805
1
C1
C2012X5RR0J106M
TDK
(2)
10礔, 6.3V Ceramic MLCC, Size 0805
GRM42-2 X5R 226K 6.3
Murata
22礔, 6.3V Ceramic MLCC, Size 1210
1
C2
C3225X5R1A226M
TDK
22礔, 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,
Q3,Q4
Si4433DY
Vishay Siliconix
(5)
P-Channel MOSFET SO-8
4
U1
MIC5159BM6/YM6
Micrel, Inc.
(6)
Programmable Current Limit 礐ap 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
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
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