MCP16301
High Voltage Input Integrated Switch Step-Down Regulator
Features
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Up to 96% Typical Efficiency
Input Voltage Range: 4.0V to 30V
Output Voltage Range: 2.0V to 15V
2% Output Voltage Accuracy
Integrated N-Channel Buck Switch: 460 mΩ
600 mA Output Current
500 kHz Fixed Frequency
Adjustable Output Voltage
Low Device Shutdown Current
Peak Current Mode Control
Internal Compensation
Stable with Ceramic Capacitors
Internal Soft-Start
Cycle by Cycle Peak Current Limit
Under Voltage Lockout (UVLO): 3.5V
Overtemperature Protection
Available Package: SOT-23-6
General Description
The MCP16301 is a highly integrated, high-efficiency,
fixed frequency, step-down DC-DC converter in a
popular 6-pin SOT-23 package that operates from input
voltage sources up to 30V. Integrated features include
a high side switch, fixed frequency Peak Current Mode
Control, internal compensation, peak current limit and
overtemperature
protection.
Minimal
external
components are necessary to develop a complete
step-down DC-DC converter power supply.
High converter efficiency is achieved by integrating the
current limited, low resistance, high-speed N-Channel
MOSFET and associated drive circuitry. High
switching frequency minimizes the size of external
filtering components resulting in a small solution size.
The MCP16301 can supply 600 mA of continuous
current while regulating the output voltage from 2.0V to
15V. An integrated, high-performance peak current
mode architecture keeps the output voltage tightly
regulated, even during input voltage steps and output
current transient conditions that are common in power
systems.
The EN input is used to turn the device on and off.
While turned off, only a few micro amps of current are
consumed from the input for power shedding and load
distribution applications.
Output voltage is set with an external resistor divider.
The MCP16301 is offered in a space saving SOT-23-6
surface mount package.
Applications
PIC
®
/dsPIC Microcontroller Bias Supply
24V Industrial Input DC-DC Conversion
Set-Top Boxes
DSL Cable Modems
Automotive
Wall Cube Regulation
SLA Battery Powered Devices
AC-DC Digital Control Power Source
Power Meters
D
2
Package Linear Regulator Replacement
- See
Figure 5-2
• Consumer
• Medical and Health Care
• Distributed Power Supplies
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Package Type
MCP16301
6-Lead SOT-23
BOOST
1
6 SW
5 V
IN
4 EN
GND 2
V
FB
3
©
2011 Microchip Technology Inc.
DS25004A-page 1
MCP16301
Typical Applications
1N4148
C
BOOST
L
1
100 nF 15 µH
SW
V
IN
C
IN
10 µF
EN
V
FB
GND
10 KΩ
40V
Schottky
Diode
V
OUT
3.3V @ 600 mA
C
OUT
2 X10 µF
31.2 KΩ
V
IN
4.5V To 30V
BOOST
1N4148
C
BOOST
L
1
100 nF 22 µH
SW
V
IN
C
IN
10 µF
EN
V
FB
GND
10 KΩ
40V
Schottky
Diode
V
OUT
5.0V @ 600 mA
C
OUT
2 X10 µF
52.3 KΩ
V
IN
6.0V To 30V
BOOST
100
90
80
V
OUT
= 5.0V
Efficiency (%)
70
60
50
40
30
20
10
0
10
V
OUT
= 3.3V
V
IN
= 12V
100
1000
I
OUT
(mA)
DS25004A-page 2
©
2011 Microchip Technology Inc.
MCP16301
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operational sections of this
specification is not intended. Exposure to maximum
rating conditions for extended periods may affect
device reliability.
Absolute Maximum Ratings †
V
IN,
SW ............................................................... -0.5V to 40V
BOOST – GND ................................................... -0.5V to 46V
BOOST – SW Voltage........................................ -0.5V to 6.0V
V
FB
Voltage ........................................................ -0.5V to 6.0V
EN Voltage ............................................. -0.5V to (V
IN
+ 0.3V)
Output Short Circuit Current ................................. Continuous
Power Dissipation ....................................... Internally Limited
Storage Temperature ................................... -65
°
C to +150
°
C
Ambient Temperature with Power Applied ..... -40
°
C to +85
°
C
Operating Junction Temperature.................. -40
°
C to +125
°
C
ESD Protection On All Pins:
HBM ................................................................. 3 kV
MM .................................................................200 V
DC CHARACTERISTICS
Electrical Characteristics:
Unless otherwise indicated, T
A
= +25°C, V
IN
= V
EN
= 12V, V
BOOST
- V
SW
= 3.3V,
V
OUT
= 3.3V, I
OUT
= 100 mA, L = 15 µH, C
OUT
= C
IN
= 2 X 10 µF X7R Ceramic Capacitors
Boldface
specifications apply over the T
A
range of -40
o
C to +85
o
C.
Parameters
Input Voltage
Feedback Voltage
Output Voltage Adjust Range
Feedback Voltage
Line Regulation
Feedback Input Bias Current
Undervoltage Lockout Start
Undervoltage Lockout Stop
Undervoltage Lockout
Hysteresis
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
NMOS Switch On Resistance
NMOS Switch Current Limit
Quiescent Current
Quiescent Current - Shutdown
Maximum Output Current
EN Input Logic High
EN Input Logic Low
EN Input Leakage Current
Soft-Start Time
Note 1:
2:
3:
Sym
V
IN
V
FB
V
OUT
(ΔV
FB
/V
FB
)/ΔV
IN
I
FB
UVLO
STRT
UVLO
STOP
UVLO
HYS
f
SW
DC
MAX
DC
MIN
R
DS(ON)
I
N(MAX)
I
Q
I
Q
I
OUT
V
IH
V
IL
I
ENLK
t
SS
Min
—
0.784
2.0
—
-250
—
2.4
—
425
90
—
—
—
—
—
600
1.4
—
—
—
Typ
4.0
0.800
—
0.01
±10
3.5
3.0
0.4
500
95
1
0.46
1.3
2
7
—
—
—
0.05
150
Max
30
0.816
15.0
0.1
+250
4.0
—
—
550
—
—
—
—
7.5
10
—
—
0.4
1.0
—
Units
V
V
V
%/V
nA
V
V
V
kHz
%
%
Ω
A
mA
µA
mA
V
V
µA
µS
Conditions
Note 1
Note 2
V
IN
= 12V to 30V;
V
IN
Rising
V
IN
Falling
I
OUT
= 200 mA
V
IN
= 5V; V
FB
= 0.7V;
I
OUT
= 100 mA
V
BOOST
- V
SW
= 3.3V
V
BOOST
- V
SW
= 3.3V
V
BOOST
= 3.3V;
Note 3
V
OUT
= EN = 0V
Note 1
V
EN
= 12V
EN Low to High,
90% of V
OUT
The input voltage should be > output voltage + headroom voltage; higher load currents increase the input voltage
necessary for regulation. See characterization graphs for typical input to output operating voltage range.
For V
IN
< V
OUT
, V
OUT
will not remain in regulation.
V
BOOST
supply is derived from V
OUT
.
©
2011 Microchip Technology Inc.
DS25004A-page 3
MCP16301
DC CHARACTERISTICS (CONTINUED)
Electrical Characteristics:
Unless otherwise indicated, T
A
= +25°C, V
IN
= V
EN
= 12V, V
BOOST
- V
SW
= 3.3V,
V
OUT
= 3.3V, I
OUT
= 100 mA, L = 15 µH, C
OUT
= C
IN
= 2 X 10 µF X7R Ceramic Capacitors
Boldface
specifications apply over the T
A
range of -40
o
C to +85
o
C.
Parameters
Thermal Shutdown Die
Temperature
Die Temperature Hysteresis
Note 1:
2:
3:
Sym
T
SD
T
SDHYS
Min
—
—
Typ
150
30
Max
—
—
Units
°C
°C
Conditions
The input voltage should be > output voltage + headroom voltage; higher load currents increase the input voltage
necessary for regulation. See characterization graphs for typical input to output operating voltage range.
For V
IN
< V
OUT
, V
OUT
will not remain in regulation.
V
BOOST
supply is derived from V
OUT
.
TEMPERATURE SPECIFICATIONS
Electrical Specifications:
Parameters
Temperature Ranges
Operating Junction Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Package Thermal Resistances
Thermal Resistance, 6L-SOT-23
θ
JA
—
190.5
—
°C/W
EIA/JESD51-3 Standard
T
J
T
A
T
J
-40
-65
—
—
—
—
+125
+150
+150
°C
°C
°C
Transient
Steady State
Sym
Min
Typ
Max
Units
Conditions
DS25004A-page 4
©
2011 Microchip Technology Inc.
MCP16301
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note:
Unless otherwise indicated, V
IN
= EN = 12V, C
OUT
= C
IN
= 2 X10 µF, L = 15 µH, V
OUT
= 3.3V, I
LOAD
= 200 mA,
T
A
= +25°C
.
90
80
Efficiency (%)
Efficiency (%)
V
IN
= 6V
100
90
80
70
60
50
40
30
V
IN
= 16V
V
IN
= 30V
70
60
50
40
30
0
V
IN
= 12V
V
IN
= 24V
V
OUT
= 12.0V
V
IN
= 30V
V
OUT
= 2.0V
100
200
300
I
OUT
(mA)
400
500
600
0
100
200
300
I
OUT
(mA)
400
500
600
FIGURE 2-1:
I
OUT
.
100
90
Efficiency (%)
80
70
60
50
40
30
0
100
V
IN
= 6V
2.0V V
OUT
Efficiency vs.
FIGURE 2-4:
I
OUT
.
100
90
Efficiency (%)
80
70
60
50
40
30
12V V
OUT
Efficiency vs.
V
IN
= 16V
V
IN
= 30V
V
IN
= 24V
V
IN
= 12V
V
IN
= 30V
V
OUT
= 3.3V
V
OUT
= 15.0V
200
300
I
OUT
(mA)
400
500
600
0
100
200
300
I
OUT
(mA)
400
500
600
FIGURE 2-2:
I
OUT
.
100
90
Efficiency (%)
80
70
60
50
40
30
0
100
V
IN
= 12V
V
IN
= 6V
3.3V V
OUT
Efficiency vs.
FIGURE 2-5:
I
OUT
.
6
5
4
I
Q
(mA)
V
IN
= 6V
15V V
OUT
Efficiency vs.
V
OUT
= 3.3V
I
OUT
= 0 mA
V
IN
= 12V
V
IN
= 30V
V
IN
= 30V
V
OUT
= 5.0V
3
2
1
0
200
300
I
OUT
(mA)
400
500
600
-40
-25
-10
5
20
35
50
65
80
Ambient Temperature (°C)
FIGURE 2-3:
I
OUT
.
5.0V V
OUT
Efficiency vs.
FIGURE 2-6:
Temperature.
Input Quiescent Current vs.
©
2011 Microchip Technology Inc.
DS25004A-page 5
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