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MIC5159 Datasheet(PDF) 13 Page - Micrel Semiconductor

Part # MIC5159
Description  PROGRAMMABLE CURRENT LIMIT UCAP LDO REGULATOR CONTROLLER
PDF  23 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC5159 Datasheet(HTML) 13 Page - Micrel Semiconductor

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April 2004
13
M9999-041204
MIC5159
Micrel
Input/Output Combination Examples
Input
Output
Maximum Current
1.8V
1.5V
4A
Schematic B
VIN
U1 MIC5159BM6
Q1
Si3445DV
R1
10kW
5
1
3
GND
C1
10mF
6.3V
R2*
GND
C2
22mF
6.3V/10V
R3
49.9W
4
6
2
EN
IN
IS
GATE
FB
GND
VOUT
Q2
Si3445DV
Application Circuit
Bill of Materials
Item
Part Number
Manufacturer
Description
Qty.
C1
GRM40 X7R 106 6.3
Murata(1)
10
µF, 6.3V Ceramic MLCC, Size 0805
1
C2012X5RR0J106M
TDK(2)
10
µF, 6.3V Ceramic MLCC, Size 0805
1
C2
GRM42-2 X5R 226K 6.3
Murata
22
µF, 6.3V Ceramic MLCC, Size 1210
1
C2012X5RR0J106M
TDK
22
µF, 10V Ceramic MLCC, Size 1210
1
R1
CRCW08051002
Vishay Dale(3)
10k
Ω Resistor, Size 0805
1
R2
CRCW08059761
Vishay Dale
Output Voltage: 2.5V; 9.76k
Ω Resistor, Size 0805(4)
1
CRCW08052152
Vishay Dale
Output Voltage: 1.8V; 21.5k
Ω Resistor, Size 0805(4)
1
CRCW08054642
Vishay Dale
Output Voltage: 1.5V; 46.4k
Ω Resistor, Size 0805(4)
1
CRCW08058253
Vishay Dale
Output Voltage: 1.25V; 825k
Ω Resistor, Size 0805(4)
1
R3
CRCW080549R9 F
Vishay Dale
49.9
Ω Resistor, Size 0805
1
Q1, Q2
Si3445DV
Vishay Siliconix(5)
P-Channel MOSFET TSOP-6
2
U1
MIC5159BM6
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:
R2
R1
V
1.235
OUT
=


– 1
5. Vishay Siliconix tel: 402-563-6866
6. Micrel, Inc. tel: 408-944-0800
0
1
2
3
4
5
6
012345
6
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60
°C T
A
Si3445DV x2 SOA



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