Information

3
Portable Power Conversion Design Guide
DC/DC Conversion
Step-Down (Buck) Switch Mode Power Converters
MCP16301/H 36V Input Voltage Non-Synchronous Buck Converter
The MCP16301 is a highly integrated, high-efficiency, fixed-frequency, step-down DC-DC converter in a popular 6-pin SOT-23
package. This converter operates from voltage sources up to 30V, including the integrated high-side switch, fixed-frequency Peak
Current Mode Control, internal compensation, peak current limit and over-temperature protection. This device allows you to build
DC/DC conversion circuits with minimal external components.
Example MCP16301 Non-Synchronous Buck Regulator Application Circuit
■ 12V and 24V industrial/SLA
battery input DC-DC conversion
■ Up to 96% typical effi ciency
■ Wide input voltage range:
• 4.0V to 30V (MCP16301)
• 4.7V to 36V (MCP16301H)
■ Output voltage range: 2.0V to 15V
■ 2% output voltage accuracy
■ Integrated 460 mΩ n-channel
buck switch
■ 600 mA output current
■ 500 kHz fi xed 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) at 3.5V
■ Extended −40 to +125°C operating
temperature range
■ Over-temperature protection
■ D2PAK package linear regulator
replacement
■ Available in 6-pin SOT-23 package
BOOST
GND
V
IN SW
V
FB
EN
40V
Schottky
Diode
15 μH
31.2 kΩ
C
OUT
2 × 10 μF
10 kΩ
1N4148
CBOOST
100 nF
L
1
VOUT
3.3V @ 600 mA
CIN
10 µF
V
IN
4.5V to 30V
Typical MCP16301 Power Conversion Effi ciency
with a Fixed 5.0V Output
30
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Efficiency (%)
I
OUT
(mA)
V
IN
= 30V
V
IN
= 12V
V
IN
= 6V
V
OUT
= 5.0V
MCP16301 Light Load Operation
I
L