MIC5159 Datasheet, PDF (13/23 Pages) Micrel Semiconductor – PROGRAMMABLE CURRENT LIMIT UCAP LDO REGULATOR CONTROLLER

MIC5159
Schematic B
Input/Output Combination Examples
Input
Output
Maximum Current
1.8V
1.5V
4A
V_IN
m^C1
10 F
6.3V
Q1
Si3445DV
Q2
Si3445DV
V_OUT
U1 MIC5159BM6
5 _{EN GATE} 4
1 _IN
FB ⁶
3 _IS
GND 2
W ^R3
49.9
W^R1
10k
R2*
m ^C2
22 F
6.3V/10V
GND
GND
Application Circuit
Micrel
6
5
4
Max. Power
Dissipation at 60°C T_A
3
2
Dropout
1
00 _{1 2 3 4 5 6}
OUTPUT CURRENT (A)
Si3445DV x2 SOA
Bill of Materials
Item
C1
C2
R1
R2
R3
Q1, Q2
U1
Part Number
GRM40 X7R 106 6.3
C2012X5RR0J106M
GRM42-2 X5R 226K 6.3
C2012X5RR0J106M
CRCW08051002
CRCW08059761
CRCW08052152
CRCW08054642
CRCW08058253
CRCW080549R9 F
Si3445DV
MIC5159BM6
Manufacturer
Murata⁽¹⁾
TDK⁽²⁾
Murata
TDK
Vishay Dale⁽³⁾
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Siliconix⁽⁵⁾
Micrel, Inc.⁽⁶⁾
Notes:
1. Murata tel: [phone]
2. TDK tel: [phone]
3. Vishay Dale tel: [phone]
4. To calculate other output voltage values:
R2
=
R1


V_OUT
1.235


–
1
5. Vishay Siliconix tel: [phone]
6. Micrel, Inc. tel: [phone]
Description
Qty.
10µF, 6.3V Ceramic MLCC, Size 0805
1
10µF, 6.3V Ceramic MLCC, Size 0805
1
22µF, 6.3V Ceramic MLCC, Size 1210
1
22µF, 10V Ceramic MLCC, Size 1210
1
10kΩ Resistor, Size 0805
1
Output Voltage: 2.5V; 9.76kΩ Resistor, Size 0805⁽⁴⁾
1
Output Voltage: 1.8V; 21.5kΩ Resistor, Size 0805⁽⁴⁾
1
Output Voltage: 1.5V; 46.4kΩ Resistor, Size 0805⁽⁴⁾
1
Output Voltage: 1.25V; 825kΩ Resistor, Size 0805⁽⁴⁾ 1
49.9Ω Resistor, Size 0805
1
P-Channel MOSFET TSOP-6
2
Programmable Current Limit µCap LDO Regulator
1
April 2004
13
M9999-041204