MICREL MIC5159

MIC5159
Programmable Current Limit µCap LDO
Regulator Controller
General Description
Features
Micrel’s MIC5159 is a precision-voltage regulator
controller. Used with an external P-Channel MOSFET, the
MIC5159 forms a two-chip low-dropout regulator capable
of driving a wide range of output currents.
The MIC5159 operates from an input of 1.65V to 5.5V. The
low input voltage allows the MIC5159 to operate off of high
power 1.8V rails to generate lower voltages such as 1.5V.
Features of the MIC5159 include enable input and currentlimit protection. As a µCap design, the MIC5159 is stable
with ceramic output capacitors.
The MIC5159 is packaged in the IttyBitty® SOT-23-6, and
is offered in fixed and adjustable output voltages. Junction
temperature range of the MIC5159 is from –40°C to
+125°C.
•
•
•
•
•
•
•
•
•
•
•
•
•
Fast transient response
Input voltage range: VIN 1.65V to 5.5V
±1.0% initial output tolerance
Fixed 1.8V or adjustable output voltage down to 1.25V
Stable with ceramic output capacitor
Capable up to 10A
Excellent line and load regulation specifications
Logic-controlled shutdown
Programmable current limit
Current-limit protection
IttyBitty® SOT-23-6 package
Available temperature range:–40°C to +125°C
Applications
•
•
•
•
•
•
•
Ultra-high current, ultra-low dropout voltage regulator
High-efficiency linear power supplies
Low-voltage distributed power
Fixed telecom
Multimedia and PC power supplies
Battery chargers
Low-voltage DSP, microprocessor and microcontroller
power supplies
Typical Application
Q1–Q4
SUB15P01–52 × 4
V IN
VOUT
U1 MIC5159BM6/YM6
5
C1
1
3
EN
GATE
IN
IS
FB
GND
GND
R1
C1
10A
C1
100mA
R2
GND
VIN = 3.3V
VOUT = 2.5V
COUT = 200µF
Adjustable Output Voltage
IttyBitty is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2006
M9999-062706
Micrel, Inc.
MIC5159
Ordering Information
Marking
Voltage*
Junction
Temp. Range
Package
MIC5159YM6
LZAA
Adj.
–40° to +125°C
SOT-23-6
MIC5159-1.8BM6
MIC5159-1.8YM6
LZ18
1.8V.
–40° to +125°C
SOT-23-6
MIC5159-3.0BM6
MIC5159-3.0YM6
LZ30
3.0V
–40° to +125°C
SOT-23-6
Part Number
Standard
Pb-Free
MIC5159BM6
Note:
Other Voltage available. Contact Micrel for details.
Pin Configuration
ADJ EN GATE
6
Pin 1
Index
5
OUT EN GATE
4
6
Pin 1
Index
LZAA
1
2
3
4
LZxx
1
IN GND IS
5
2
3
IN GND IS
SOT-23-6 (M6)
Adjustable Voltage Version
SOT-23-6 (M6)
Fixed Voltage Version
Pin Description
Pin Number
Pin Name
Pin Function
1
IN
Input Voltage.
2
GND
3
IS
4
GATE
5
6
June 2006
Ground.
Current Sense: IS must be tied to VIN pin if the current limit feature is not used.
Gate drive of the external P-Channel MOSFET.
EN
Enable Input: Logic Level ON/OFF control. Logic high = ON; logic low = OFF.
ADJ
Adjustable Regulator Feedback Input: Connect to resistor voltage divider.
OUT
Output Voltage: Connect to drain of P-Channel MOSFET to regulate output to
proper voltage.
2
M9999-062706
Micrel, Inc.
MIC5159
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) ....................................................+6.0V
Enable Input Voltage (VEN)..........................................+6.0V
Power Dissipation (PD(max)) ........................................ Note 3
Storage Temperature (Ts) .........................–65°C to +150°C
Lead Temperature (soldering, 5 sec.)........................ 260°C
EDS Rating(4) .................................................................. 2kV
Supply voltage (VIN) ................................... +1.65V to +5.5V
Enable Input Voltage (VEN)................................ 0V to +5.5V
Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C
Package Thermal Resistance
SOT-23-6 (θJA).................................................235°C/W
Electrical Characteristics(5)
TA = 25°C with VIN = VOUT + 1V; VEN = 1.2V, CIN = COUT = 10µF, ceramic, IOUT = 10mA; bold values indicate –40°C < TJ < +125°C;
unless otherwise specified, Note 3
Parameter
Condition
Max
Units
Output Voltage Accuracy
At 25°C
–1
+1
%
Over temperature range
–2
+2
%
Output Voltage Line Regulation
VIN = VOUT + 1.0V to 5.5V
–0.1
0.007
+0.1
%/V
Output Voltage Load Regulation
IL = 10mA to 1.0A
0.2
1.0
%
VEN ≤ 0.2V (MIC5159 OFF)
15
30
µA
VEN ≥ 1.2V (MIC5159 ON)
10
20
mA
1
µA
Ground Pin Current
(6)
Min
Typ
Adjust Pin Bias Current
Maximum VGS
(PFET fully ON); VIN = 5.0V
4.5
V
(PFET fully ON); VIN = 3.3V
3.1
V
(PFET fully ON); VIN = 2.5V
2.3
Current-Limit Threshold
VIN – VIS
40
Start-up Time
VEN = VIN
V
50
65
mV
30
150
µs
0.2
V
250
mV
1
µA
Enable Input
Enable Input Threshold
Regulator enabled
V
1.2
Regulator shutdown
Enable hysteresis
Enable Pin Input Current
20
Independent of state
50
0.01
nA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. PD(max) = (TJ(max) – TA) ÷ θJA, where θJA depends upon the printed circuit layout, see “Applications Information.”
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. IGND is the quiescent current. IIN = IGND + IOUT.
June 2006
3
M9999-062706
Micrel, Inc.
MIC5159
Typical Characteristics
Current Limit Threshold
vs. Input Voltage
58
56
54
52
50
48
46
5.65
EN off
300
200
June 2006
5.65
INPUT VOLTAGE (V)
5.15
4.65
4.15
3.65
3.15
1.65
0
2.15
100
OUTPUT VOLTAGE (V)
1.230
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
LOAD (A)
QUIESCENT CURRENT (mA)
Current Limit Threshold
vs. Temperature
58
56
54
52
50
48
46
44
42
40
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
SHUTDOWN CURRENT (µA)
500
400
1
VIN = 3.3V
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
20
EN on
600
2
60
Enable Threshold
vs. Input Voltage
700
4
3
Quiescent Current
vs. Load
9
8
7
6
5
4
3
2
1
VIN = 2.5V
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
LOAD (A)
800
Enable Threshold
vs. Temperature
700
600
500
EN on
400
300
200
EN off
100
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Shutdown Current
vs. Input Voltage
-40°C
18
16
25°C
14
12
85°C
10
8
6
4
2
0
1.65
INPUT VOLTAGE (V)
5.15
4.65
4.15
3.65
3.15
1.65
42
40
2.65
44
CURRENT LIMIT THRESHOLD (mV)
5.65
INPUT VOLTAGE (V)
5.15
4.65
4.15
3.65
3.15
2.65
2.15
1.65
60
ILOAD = 10mA
1.232
1.231
INPUT VOLTAGE (V)
4
5.65
2
5
5.15
4
3
1.234
1.233
ENABLE THRESHOLD (mV)
QUIESCENT CURRENT (mA)
5
7
6
VIN = 2.5V
1.236
1.235
10
9
8
Output Voltage
vs. Load
1.238
1.237
Quiescent Current
vs. Temperature
4.65
5.65
5.15
4.65
4.15
3.65
3.15
7
6
1
0
1.231
1.230
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
10
9
8
2.15
QUIESCENT CURRENT (mA)
CURRENT LIMIT THRESHOLD (mV)
INPUT VOLTAGE (V)
1.232
Quiescent Current
vs. Input Voltage
10
ENABLE THRESHOLD (mV)
2.65
1.65
1.220
2.15
1.225
1.234
1.233
4.15
1.230
1.235
3.65
1.235
1.237
1.236
3.15
1.240
1.240
1.239
VIN = 3.3V
1.239
1.238
2.65
REFERENCE VOLTAGE (V)
1.240
1.245
2.65
REFERENCE VOLTAGE (V)
1.250
Reference Voltage
vs. Temperature
2.15
Reference Voltage
vs. Input Voltage
M9999-062706
Micrel, Inc.
MIC5159
Functional Characteristics
2A
10mA
VIN = 1.8V
VOUT = 1.5V
COUT = 100µF
June 2006
VIN = 3.3V
VOUT = 1.8V
5
M9999-062706
Micrel, Inc.
MIC5159
Functional Diagram
VIN
RS
VOUT
IS
GATE
Buffer
I SNS
Amplifier
IN
VOUT
S
VREF
VREF
Enable
EN
GND
Block Diagram – Fixed Output Voltages
VIN
RS
VOUT
IS
GATE
R1
Buffer
ADJ.
ISNS
Amplifier
IN
EN
S
R2
VREF
VREF
Enable
Block Diagram – Adjustable Output Voltages
June 2006
6
M9999-062706
Micrel, Inc.
MIC5159
⎛ (2.5V − 1.8 V ) ⎞
R DS(ON) = ⎜
⎟ − 10mΩ
5A
⎠
⎝
Application Information
The MIC5159 is a high performance voltage regulator
controller. When used with an external P-Channel
MOSFET and a tiny ceramic output capacitor, it forms a
wide variety of simple, inexpensive ultra-low-dropout
voltage regulators.
RDS(ON) = 130mΩ
According to the above calculation, the minimum RDS(ON)
is 130mΩ for a 2.5V to 1.8V LDO with 5A of output
current. For this design, the R DS(ON) for the FETs should
maintain better than 130mΩ over the required
temperature, current, and voltage conditions.
Placing two or more P-Channel FETs in parallel can
reduce the total R DS(ON) of the regulator. This also aids
thermal dissipation by sharing the current and heat
between the multiple FETs.
Current Sense Resistor Selection
A current sense resistor placed between the input and
the current sense pin (IS) allows for programmability of
the current limit. This resistor can simply be calculated
by:
⎛ 50mV ⎞
⎟
R SENSE = ⎜⎜
⎟
⎝ I OUT ⎠
Thermal Considerations
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. Since the MIC5159 offers no thermal
protection, thermal design requires the following
application-specific parameters:
Where IOUT is the maximum output current. For example,
the current sense resistor for a 2.5VIN to 1.8VOUT, 5A,
linear regulator calculates as follows:
⎛ 50mV ⎞
R SENSE = ⎜
⎟
⎝ 5A ⎠
RSENSE = 10mΩ
P-Channel MOSFET Selection
The P-Channel MOSFET selected for use with the
MIC5159 must satisfy the following requirements:
•
Input voltage
•
Gate threshold
•
Load current
•
Dropout voltage (input-to-output differential)
(
) ⎞⎟
⎟
⎠
•
Output current (IOUT)
•
Output voltage (VOUT)
(
⎛ TJ(MAX) − TA
θ JA = ⎜⎜
PD
⎝
) ⎞⎟
⎟
⎠
Where TJ(max) is equal to the maximum die temperature
of the P-Channel.
θJA = θJC + θCS + θSA
Example
For the same regulator, 2.5VIN to 1.8VOUT at 5A with an
ambient temperature of 60°C:
PD = (2.5V–1.8V) × 5A
PD = 3.5W
Where VIN is the maximum VIN and IOUT is the maximum
IOUT.
The P-Channel MOSFET must be able to dissipate
3.5W. The minimum θJA to maintain a maximum TJ of
150°C (max.) TJ according to a typical MOSFET data
sheet is as follows:
− R SENSE
Where IOUT(max) is the maximum output current and
RSENSE is the current sense resistor.
For example, the MIC5159-1.8BM6 is used with an
external MOSFET to form a 5A LDO with an input of
2.5V. Either a 2.5V or 1.8V gate threshold MOSFET can
be selected. The minimum RDS(ON) is calculated as:
June 2006
Maximum ambient temperature (TA)
• Input voltage (VIN)
First, calculate the maximum power dissipation of the
regulator:
PD = (VIN – VOUT) × IOUT
Ground current can generally be ignored. The amount of
power dissipated by ground current and input voltage is
minimal. Minimum θJA for the MOSFET can be
calculated using the following formula:
• Thermal performance
To prevent damage to the P-Channel MOSFET, the
maximum input voltage (VIN(max)) must be less than its
drain-source breakdown voltage (BVDS). In addition, the
minimum input voltage (VIN(min)) must be greater than or
equal to the gate threshold voltage (VGS) of the PChannel MOSFET. For a given output current and
dropout requirement, the ON-resistance (RDS(ON)) of the
P-Channel MOSFET must also be determined. The
minimum RDS(ON) of the P-Channel MOSFET is
calculated as follows:
⎛ VIN(MIN) − VOUT
R DS(ON) = ⎜
⎜
IOUT(MAX)
⎝
•
θ JA =
7
(150°C − 60°C)
3.5W
M9999-062706
Micrel, Inc.
MIC5159
2.0
Q1,2,3
Si4433DYx3
MIC5159-1.8BM6/YM6
ISENSE
VIN
GATE
POWER DISSIPATION (W)
4.5
4
3.5
3
2.5
2
1.5
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
Constant Current
Limiting
Re-Entrant
Current Limiting
1
0.5
0
0
0.5
1
OUTPUT VOLTAGE (V)
1.5
Figure 3. Power Dissipation
vs. Output Voltage
Enable/Shutdown
The MIC5159 comes with an active-high enable pin that
allows the regulator to be disabled. Forcing the enable
pin low disables the regulator and sends it into a low offmode-current state. Forcing the enable pin high enables
the output voltage. This part is CMOS and the enable pin
cannot be left floating; a floating enable pin may cause
an indeterminate state on the output.
Output Capacitor
The MIC5159 requires an output capacitor to maintain
stability and improve transient response. Proper
selection is important to ensure proper operation. The
MIC5159 output capacitor selection is highly dependent
upon the components and the application. With a very
high gate charge (gate capacitance) MOSFET, the
output requires a much larger valued ceramic capacitor
for stability. As an alternative to a large valued ceramic
capacitor, a smaller-valued tantalum capacitor can be
used to provide stability. At higher load currents, lower
RDS(ON) MOSFETs are used; these MOSFETs typically
having much larger gate charge. If the application does
not require ultra-low-dropout voltage, smaller values of
ceramic capacitance may be used.
1.8 VOUT 1.5A
C2
47µF
ADJ
Figure 1. Re-Entrant Current Limit
June 2006
0.6
0.4
0.2 Re-Entrant
Current Limit
0
5
RSENSE
C1
10µF
1.0
0.8
Figure 2. Output Voltage Characteristics
Re-Entrant Current Limit
RVOUT
RVIN
1.4
1.2
OUTPUT CURRENT (A)
Short-Circuit Current Limit
The above thermal design calculations apply to normal
operation. In the case where the P-Channel MOSFET
must survive extended periods of short-circuit current,
another approach for thermal design must be
considered. Due to the fact that the MIC5159 delivers
constant current limiting, power dissipated by the
MOSFET is equal to the input voltage multiplied by the
maximum output current.
Figure 1 shows a simple, inexpensive circuit that allows
the current limiting to be re-entrant. This reduces power
dissipation in current limited conditions. As the output
voltage begins to drop, the differential voltage across the
input and output increases. This pulls the current sense
voltage lower, reducing the amount of output current to
maintain 50mV across the sense resistor. This reduction
in output current equates to a reduction in power
dissipation in the MOSFET. Figures 2 and 3 show a
comparison of linear current limiting versus the reentrant current limiting scheme implemented in Figure 1.
3.3 VIN
Constant Current Limit
1.8
1.6
0.00
OUTPUT VOLTAGE (V)
θJA = 25.71°C/W
The heatsink and MOSFET must have a combined
thermal resistance to meet the above criteria.
The typical thermal resistance from the junction to the
case (θJC) of a TO-263 (D2 pack) is 6°C/W. Adding
0.2°C/W for case to sink thermal resistance (θCS), the
heatsink must have a sink to ambient thermal resistance
(θSA) of:
θSA = θJA– (θJC + θCS)
θSA = 25.71°C/W – (6°C/W + 0.2°C/W)
θSA = 19.51°C/W
According to the calculations, the heatsink must have a
θSA of 19.51°C/W or better.
For a full discussion of heat sinking and thermal effects
on voltage regulators, refer to the “Regulator Thermals”
section of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook.
8
M9999-062706
Micrel, Inc.
MIC5159
Input Capacitor
An input capacitor of 1.0µF or greater is recommended
when the device is more than 4 inches away from the
bulk AC supply capacitance or when the supply is a
battery. Small, surface mount, ceramic capacitors can be
used for bypassing the input to the regulator, further
improving the integrity of the output voltage. Larger input
capacitors may be required depending on the
impedance of the source and the output load
requirements.
Adjustable Regulator Design
The MIC5159 allows programming the output voltage
anywhere between 1.235V to VIN. Two resistors are
used. See Figure 4. The resistor values are calculated
by:
⎛⎛ V
⎞ ⎞
R1 = R2 × ⎜⎜ ⎜⎜ OUT ⎟⎟ − 1⎟⎟
⎝ ⎝ 1.235 ⎠ ⎠
Where VOUT is the desired output voltage.
Layout Considerations
Input and output capacitor placement should be as close
as possible to the input and output, respectively. Trace
resistance between the current sense and the MOSFET
source should be minimized. Trace resistance will
increase dropout voltage. This is more of a factor at
higher output currents.
Also, a minimum amount of distance between the gate
pin, on the MIC5159, and the P-Channel MOSFET gate
is recommended. A long trace can create a small
parasitic inductor. This, coupled to the gate capacitance
of the MOSFET, can create a high frequency tank circuit.
A small 50Ω resistor in series with the gate may be
required to eliminate high-frequency noise.
June 2006
VIN
RS
VOUT
Si3445
MIC5159-x.x
IS
GATE
IN
ADJ
EN
GND
R1
COUT = 10µF
ceramic
R2
Figure 4. Adjustable Regulator Design
9
M9999-062706
Micrel, Inc.
MIC5159
Designing with MIC5159
3.3VIN to 1.25VOUT Conversion
The following section details:
IOUT
0.4A
0.75A
0.75A
1.25A
1.75A
1.75A
2.75A
3.75A
•
Application examples of possible input/output
configurations
with
related
schematics
designator.
•
Schematics
with
“Bill
of
Materials”
recommendation, dropout performance and
maximum output current for each FET
combination.
•
Further advice on MOSFET selection.
COUT
10µF
22µF
10µF
44µF
44µF
22µF
44µF
44µF
MOSFET
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
Package
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
IOUT
1.25A
2.5A
2.5A
4.0A
5.5A
5.5A
8.0A
11.0A
Schematic
C
D
H
E
F
I
J
K
COUT
10µF
22µF
10µF
44µF
44µF
22µF
44µF
44µF
MOSFET
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
Package
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
IOUT
1.0A
2.0A
2.0A
3.0A
4.0A
4.0A
6.0A
8.0A
Schematic
C
D
H
E
F
I
J
K
COUT
10µF
22µF
10µF
44µF
44µF
22µF
44µF
44µF
June 2006
MOSFET
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
Schematic
C
D
H
E
F
I
J
K
COUT
10µF
22µF
10µF
44µF
44µF
22µF
44µF
44µF
MOSFET
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
Package
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
Schematic
C
D
H
E
F
I
J
K
COUT
10µF
22µF
10µF
44µF
44µF
22µF
44µF
44µF
MOSFET
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
Package
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
Schematic
C
D
H
E
F
I
J
K
Package
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
Schematic
C
D
H
E
F
I
J
K
2.5VIN to 1.25VOUT Conversion
3.3VIN to 1.5VOUT Conversion
IOUT
0.5A
1.0A
1.0A
1.5A
2.0A
2.0A
3.0A
4.25A
Package
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
2.5VIN to 1.5VOUT Conversion
3.3VIN to 1.8VOUT Conversion
IOUT
0.6A
1.25A
1.25A
2.0A
2.5A
2.5A
3.75A
5.0A
MOSFET
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
2.5VIN to 1.8VOUT Conversion
3.3VIN to 2.5VOUT Conversion
IOUT
1.0A
2.5A
2.5A
3.5A
5.0A
5.0A
7.5A
10.0A
COUT
10µF
22µF
10µF
44µF
44µF
22µF
44µF
44µF
Package
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
IOUT
0.75A
1.5A
1.5A
2.0A
3.0A
3.0A
4.5A
6.0A
Schematic
C
D
H
E
F
I
J
K
10
COUT
10µF
22µF
10µF
44µF
44µF
22µF
44µF
44µF
MOSFET
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
M9999-062706
Micrel, Inc.
MIC5159
1.8VIN to 1.5VOUT Conversion
IOUT
2.0A
4.0A
6.0A
(1)
7.0A
COUT
10µF
22µF
200µF
44µF
MOSFET
Si3445DV
Si3445DV x2
Si4403DY x2
SUB15P01-52 x4
1.8VIN to 1.25VOUT Conversion
Package
TSOP-6
TSOP-6
SO-8
D2PAK
Schematic
A
B
G
K
IOUT
1.0A
1.5A
3.0A
3.0A
4.5A
6.0A
6.5A
9.0A
13.0A
Note:
1. For space constrained designs, a DPAK equivalent can be used in
this application (SUD15P01-52). This is due to RDS(ON) limitation NOT
power dissipation.
June 2006
11
COUT
10µF
10µF
22µF
10µF
44µF
44µF
22µF
88µF
88µF
MOSFET
Si3445DV
Si4433DY
Si4433DY x2
SUB15P01-52
Si4433DY x3
Si4433DY x4
SUB15P01-52 x2
SUB15P01-52 x3
SUB15P01-52 x4
Package
TSOP-6
SO-8
SO-8
D2PAK
SO-8
SO-8
D2PAK
D2PAK
D2PAK
Schematic
A
C
D
H
E
F
I
J
K
M9999-062706
Micrel, Inc.
MIC5159
Schematic A
Input/Output Combination Examples
Output
1.5V
1.25V
Maximum Current
2A
1A
INPUT–OUTPUT VOLTAGE (V)
Input
1.8V
1.8V
U1 MIC5159BM6/YM6
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
1
0
0
Application Circuit
Dropout
0.5
1
1.5
2
2.5
OUTPUT CURRENT (A)
3
Si3445DV SOA
Bill of Materials
Item
Part Number
Manufacturer
C1
GRM40 X7R 106 6.3
Murata
C2
C2012X5RR0J106M
Murata
R1
CRCW08051002
R2
CRCW08059761
CRCW08052152
(1)
Description
Qty.
10µF, 6.3V Ceramic MLCC, Size 0805
1
10µF, 6.3V Ceramic MLCC, Size 0805
1
Vishay Dale(2)
10kΩ Resistor, Size 0805
1
Vishay Dale
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805(3)
1
Vishay Dale
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805
(3)
1
(3)
1
CRCW08054642
Vishay Dale
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805
CRCW08058253
Vishay Dale
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(3)
1
R3
CRCW080549R9 F
Vishay Dale
49.9Ω Resistor, Size 0805
1
Q1
Si3445DV
Vishay Siliconix(4)
P-Channel MOSFET TSOP-6
1
Programmable Current Limit µCap LDO Regulator
1
U1
MIC5159BM6/YM6
(5)
Micrel, Inc.
Notes:
1. Murata Tel: 949-916-4000
2. Vishay Dale Tel: 402-563-6866
3. To calculate other output voltage values:
R2 =
R1
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
4. Vishay Siliconix Tel: 402-563-6866
5. Micrel, Inc. Tel: 408-944-0800
June 2006
12
M9999-062706
Micrel, Inc.
MIC5159
Schematic B
Input/Output Combination Examples
Output
1.5V
Maximum Current
4A
INPUT–OUTPUT VOLTAGE (V)
Input
1.8V
U1 MIC5159BM6/YM6
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
1
0
0
Application Circuit
Dropout
1
2
3
4
5
OUTPUT CURRENT (A)
6
Si3445DV x2 SOA
Bill of Materials
Item
Part Number
Manufacturer
Description
C1
GRM40 X7R 106 6.3
Murata(1)
10µF, 6.3V Ceramic MLCC, Size 0805
(2)
C2012X5RR0J106M
TDK
C2
GRM42-2 X5R 226K 6.3
Murata
22µF, 6.3V Ceramic MLCC, Size 1210
C2012X5RR0J106M
TDK
22µF, 10V Ceramic MLCC, Size 1210
R1
CRCW08051002
Vishay Dale(3)
10kΩ Resistor, Size 0805
R2
CRCW08059761
Vishay Dale
Qty.
1
10µF, 6.3V Ceramic MLCC, Size 0805
1
1
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805
(4)
1
(4)
1
1
CRCW08052152
Vishay Dale
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805
CRCW08054642
Vishay Dale
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
(4)
1
CRCW08058253
Vishay Dale
Output Voltage:1.25V; 825kΩ Resistor, Size 0805
R3
CRCW080549R9 F
Vishay Dale
49.9Ω Resistor, Size 0805
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
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
13
M9999-062706
Micrel, Inc.
MIC5159
Schematic C
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.25V
Maximum Current
1A
0.6A
0.5A
0.4A
1.25A
1A
0.75A
1.5A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
Max. Power
Dissipation at 60°C TA
4
3
2
Dropout
1
0
0
0.5
1
1.5
OUTPUT CURRENT (A)
2
Si34433DY SOA
Bill of Materials
Item
Part Number
Manufacturer
Description
C1
GRM40 X7R 106 6.3
Murata(1)
10µF, 6.3V Ceramic MLCC, Size 0805
1
10µF, 6.3V Ceramic MLCC, Size 0805
1
10kΩ Resistor, Size 0805
1
C2
C2012X5RR0J106M
TDK
(2)
(3)
Qty.
R1
CRCW08051002
Vishay Dale
R2
CRCW08059761
Vishay Dale
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805(4)
1
CRCW08052152
Vishay Dale
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805
(4)
1
CRCW08054642
Vishay Dale
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
1
(4)
1
CRCW08058253
Vishay Dale
Output Voltage:1.25V; 825kΩ Resistor, Size 0805
R3
CRCW080549R9 F
Vishay Dale
49.9Ω Resistor, Size 0805
Q1
Si4433DY
Vishay Siliconix(5)
P-Channel MOSFET SO-8
1
U1
MIC5159BM6/YM6
Micrel, Inc.(6)
Programmable Current Limit µCap LDO Regulator
1
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
14
M9999-062706
Micrel, Inc.
MIC5159
Schematic D
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.5V
1.25V
Maximum Current
2.5A
1.25A
1A
0.75A
2.5A
2A
1.5A
2A
3A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
Dropout
1
0
0
1
2
3
OUTPUT CURRENT (A)
4
Si34433DY 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
C3225X5R1A226M
CRCW08051002
CRCW08059761
CRCW08052152
CRCW08054642
CRCW08058253
CRCW080549R9 F
Si4433DY
MIC5159BM6/YM6
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)
Description
10µF, 6.3V Ceramic MLCC, Size 0805
10µF, 6.3V Ceramic MLCC, Size 0805
22µF, 6.3V Ceramic MLCC, Size 1210
22µF, 10V Ceramic MLCC, Size 1210
10kΩ Resistor, Size 0805
Output Voltage:2.3V; 9.76kΩ Resistor, Size 0805(4)
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805(4)
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(4)
49.9Ω Resistor, Size 0805
P-Channel MOSFET SO-8
Programmable Current Limit µCap LDO Regulator
Qty.
1
1
1
1
1
1
1
1
2
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
15
M9999-062706
Micrel, Inc.
MIC5159
Schematic E
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.25V
Maximum Current
3.5A
2A
1.5A
1.25A
4A
3A
2A
4.5A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
Dropout
1
0
0
1
2
3
4
5
OUTPUT CURRENT (A)
6
Si34433DY x3 SOA
Bill of Materials
Item
C1
C2
R1
R2
R3
Q1,Q2,
Q3
U1
Part Number
GRM40 X7R 106 6.3
C2012X5RR0J106M
GRM42-2 X5R 226K 6.3
C3225X5R1A226M
CRCW08051002
CRCW08059761
CRCW08052152
CRCW08054642
CRCW08058253
CRCW080549R9 F
Si4433DY
Manufacturer
Murata(1)
TDK(2)
Murata
TDK
Vishay Dale(3)
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Siliconix(5)
Description
10µF, 6.3V Ceramic MLCC, Size 0805
10µF, 6.3V Ceramic MLCC, Size 0805
22µF, 6.3V Ceramic MLCC, Size 1210
22µF, 10V Ceramic MLCC, Size 1210
10kΩ Resistor, Size 0805
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805(4)
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805(4)
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(4)
49.9Ω Resistor, Size 0805
P-Channel MOSFET SO-8
MIC5159BM6/YM6
Micrel, Inc.(6)
Programmable Current Limit µCap LDO Regulator
Qty.
1
1
1
1
1
1
1
1
3
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
16
M9999-062706
Micrel, Inc.
MIC5159
Schematic F
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.25V
Maximum Current
5A
2.5A
2A
1.75A
5.5A
4A
3A
6.5A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
Dropout
1
0
0
2
4
6
OUTPUT CURRENT (A)
8
Si34433DY x4 SOA
Bill of Materials
Item
C1
C2
R1
R2
R3
Q1,Q2,
Q3,Q4
U1
Part Number
GRM40 X7R 106 6.3
C2012X5RR0J106M
GRM42-2 X5R 226K 6.3
C3225X5R1A226M
CRCW08051002
CRCW08059761
CRCW08052152
CRCW08054642
CRCW08058253
CRCW080549R9 F
Si4433DY
Manufacturer
Murata(1)
TDK(2)
Murata
TDK
Vishay Dale(3)
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Siliconix(5)
Description
10µF, 6.3V Ceramic MLCC, Size 0805
10µF, 6.3V Ceramic MLCC, Size 0805
22µF, 6.3V Ceramic MLCC, Size 1210
22µF, 10V Ceramic MLCC, Size 1210
10kΩ Resistor, Size 0805
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805(4)
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805(4)
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(4)
49.9Ω Resistor, Size 0805
P-Channel MOSFET SO-8
Qty.
1
MIC5159BM6/YM6
Micrel, Inc.(6)
Programmable Current Limit µCap LDO Regulator
1
1
1
1
1
1
1
1
4
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
17
M9999-062706
Micrel, Inc.
MIC5159
Schematic G
Input/Output Combination Examples
Output
1.5V
Maximum Current
6A
INPUT–OUTPUT VOLTAGE (V)
Input
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
Dropout
1
0
0 1 2 3 4 5 6 7 8 9 10
OUTPUT CURRENT (A)
Si34403DY x2 SOA
Bill of Materials
Item
Part Number
Manufacturer
Description
C1
GRM40 X7R 106 6.3
Murata(1)
10µF, 6.3V Ceramic MLCC, Size 0805
C2,C3
(2)
C2012X5RR0J106M
TDK
GRM43 ER60J476K
Murata
1
10µF, 6.3V Ceramic MLCC, Size 0805
47µF, 6.3V Ceramic MLCC, Size 1812
C4,C5,C6
C4532X5R0J476M
TDK
47µF, 6.3V Ceramic MLCC, Size 1812
R1
CRCW08051002
Vishay Dale(3)
10kΩ Resistor, Size 0805
R2
Qty.
1
1
(4)
1
CRCW08059761
Vishay Dale
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805
CRCW08052152
Vishay Dale
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805(4)
1
Vishay Dale
(4)
1
CRCW08054642
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805
(4)
1
CRCW08058253
Vishay Dale
Output Voltage:1.25V; 825kΩ Resistor, Size 0805
R3
CRCW080549R9 F
Vishay Dale
49.9Ω Resistor, Size 0805
Q1,Q2
Si4403DY
Vishay Siliconix(5)
P-Channel MOSFET SO-8
2
U1
MIC5159BM6/YM6
Micrel, Inc.(6)
Programmable Current Limit µCap LDO Regulator
1
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
18
M9999-062706
Micrel, Inc.
MIC5159
Schematic H
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.25V
Maximum Current
2.5A
1.25A
1A
0.75A
2.5A
2A
1.5A
3A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
Max. Power
Dissipation at 60°C TA
4
3
2
Dropout
1
0
0 0.5 1 1.5 2 2.5 3 3.5 4
OUTPUT CURRENT (A)
SUB15P01-52 SOA
Bill of Materials
Item
Part Number
Manufacturer
Description
C1
GRM40 X7R 106 6.3
Murata(1)
10µF, 6.3V Ceramic MLCC, Size 0805
1
10µF, 6.3V Ceramic MLCC, Size 0805
1
(2)
C2
C2012X5RR0J106M
TDK
R1
CRCW08051002
Vishay Dale(3)
R2
CRCW08059761
Vishay Dale
Qty.
10kΩ Resistor, Size 0805
1
Output Voltage:2.5V; 9.76KΩ Resistor, Size 0805
(4)
(4)
1
1
1
CRCW08052152
Vishay Dale
Output Voltage:1.8V; 21.5KΩ Resistor, Size 0805
CRCW08054642
Vishay Dale
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
CRCW08058253
Vishay Dale
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(4)
1
R3
CRCW080549R9 F
Vishay Dale
49.9Ω Resistor, Size 0805
1
Q1
SUB15P01-52
Vishay Siliconix(5)
P-Channel MOSFET TO-263
1
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:
R2 =
R1
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
19
M9999-062706
Micrel, Inc.
MIC5159
Schematic I
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.25V
Maximum Current
5A
2.5A
2A
1.75A
5.5A
4A
3A
6.5A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
Max. Power
Dissipation at 60°C TA
4
3
2
Dropout
1
0
0
1 2 3 4 5 6 7
OUTPUT CURRENT (A)
8
SUB15P01-52 x2 SOA
Bill of Materials
Item
C1
Part Number
Manufacturer
(1)
Description
Qty.
GRM40 X7R 106 6.3
Murata
C2012X5RR0J106M
TDK(2)
GRM42-2 X5R 226K 6.3
Murata
22µF, 6.3V Ceramic MLCC, Size 1210
C3225X5R1A226M
TDK
22µF, 10V Ceramic MLCC, Size 1210
R1
CRCW08051002
Vishay Dale(3)
10kΩ Resistor, Size 0805
R2
CRCW08059761
Vishay Dale
Output Voltage:2.5V; 9.76KΩ Resistor, Size 0805(4)
CRCW08052152
Vishay Dale
Output Voltage:1.8V; 21.5KΩ Resistor, Size 0805
(4)
1
CRCW08054642
Vishay Dale
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
1
CRCW08058253
Vishay Dale
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(4)
1
R3
CRCW080549R9 F
Vishay Dale
49.9Ω Resistor, Size 0805
1
Q1,Q2
SUB15P01-52
Vishay Siliconix(5)
P-Channel MOSFET TO-263
2
U1
MIC5159BM6/YM6
Micrel, Inc.(6)
Programmable Current Limit µCap LDO Regulator
1
C2
10µF, 6.3V Ceramic MLCC, Size 0805
1
10µF, 6.3V Ceramic MLCC, Size 0805
1
1
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
20
M9999-062706
Micrel, Inc.
MIC5159
Schematic J
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.25V
Maximum Current
7.5A
3.75A
3A
2.75A
8A
6A
4.5A
9.5A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
Dropout
1
0
0
2
4
6
8
10
OUTPUT CURRENT (A)
12
SUB15P01-52 x3 SOA
Bill of Materials
Item
C1
C2, C3
R1
R2
R3
Q1,Q2
Q3
U1
Part Number
GRM40 X7R 106 6.3
C2012X5RR0J106M
GRM42-2 X5R 226K 6.3
C3225X5R1A226M
CRCW08051002
CRCW08059761
CRCW08052152
CRCW08054642
CRCW08058253
CRCW080549R9 F
SUB15P01-52
Manufacturer
Murata(1)
TDK(2)
Murata
TDK
Vishay Dale(3)
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Siliconix(5)
Description
10µF, 6.3V Ceramic MLCC, Size 0805
10µF, 6.3V Ceramic MLCC, Size 0805
22µF, 6.3V Ceramic MLCC, Size 1210
22µF, 10V Ceramic MLCC, Size 1210
10kΩ Resistor, Size 0805
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805(4)
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805(4)
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(4)
49.9Ω Resistor, Size 0805
P-Channel MOSFET TO-263
MIC5159BM6/YM6
Micrel, Inc.(6)
Programmable Current Limit µCap LDO Regulator
Qty.
1
1
1
1
1
1
1
1
3
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
⎛ VOUT
⎜
⎜ 1.235
⎝
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
21
M9999-062706
Micrel, Inc.
MIC5159
Schematic K
Input/Output Combination Examples
Output
2.5V
1.8V
1.5V
1.25V
1.8V
1.5V
1.25V
1.5V
1.25V
Maximum Current
10A
5A
4.25A
3.75A
11A
8A
6A
7A
13A
INPUT–OUTPUT VOLTAGE (V)
Input
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
2.5V
1.8V
1.8V
U1 MIC5159BM6/YM6
Application Circuit
6
5
4
Max. Power
Dissipation at 60°C TA
3
2
Dropout
1
0
0
2.5
5
7.5 10 12.5 15
OUTPUT CURRENT (A)
SUB15P01-52 x4 SOA
Bill of Materials
Item
C1
C2, C3
R1
R2
R3
Q1, Q2
Q3, Q4
U1
Part Number
GRM40 X7R 106 6.3
C2012X5RR0J106M
GRM42-2 X5R 226K 6.3
C3225X5R1A226M
CRCW08051002
CRCW08059761
CRCW08052152
CRCW08054642
CRCW08058253
CRCW080549R9 F
SUB15P01-52
Manufacturer
Murata(1)
TDK(2)
Murata
TDK
Vishay Dale(3)
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Siliconix(5)
Description
10µF, 6.3V Ceramic MLCC, Size 0805
10µF, 6.3V Ceramic MLCC, Size 0805
22µF, 6.3V Ceramic MLCC, Size 1210
22µF, 10V Ceramic MLCC, Size 1210
10kΩ Resistor, Size 0805
Output Voltage:2.5V; 9.76kΩ Resistor, Size 0805(4)
Output Voltage:1.8V; 21.5kΩ Resistor, Size 0805(4)
Output Voltage:1.5V; 46.4kΩ Resistor, Size 0805(4)
Output Voltage:1.25V; 825kΩ Resistor, Size 0805(4)
49.9Ω Resistor, Size 0805
P-Channel MOSFET TO-263
MIC5159BM6/YM6
Micrel, Inc.(6)
Programmable Current Limit µCap LDO Regulator
Qty.
1
2
1
1
1
1
1
1
4
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
⎛ VOUT
⎜
⎜
⎝
1.235
⎞
⎟ −1
⎟
⎠
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
June 2006
22
M9999-062706
Micrel, Inc.
MIC5159
Package Information
6-Pin SOT-23 (M6)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2004 Micrel, Incorporated.
June 2006
23
M9999-062706