Microchip Technology dsPIC33CK User Manual

Design Details
 2020 Microchip Technology Inc. DS50002927A-page 63
C.3.2 +5V Output Power Supply
The +5V output power supply is a buck converter (see Figure C-6) based on
MCP16301. This power supply stage has the following specifications:
• Input Voltage (V
IN) = +12V
• Output Voltage (labeled as ‘+5V’) = +5V
FIGURE C-6: +5V POWER SUPPLY
The component values used in this circuit are listed in Ta bl e C - 2 ,and were chosen
using Equation C-4 with V
BUCK = +5V, VFB = 0.8V and K = 0.22V/H.
EQUATION C-4:
TABLE C-2: +5V POWER SUPPLY COMPONENT VALUES
Label Component Designator Component Value
R
BOT1 R18 10k
R
TOP1R14 52.5k
LL222 µH
RBOOST R13 82R
C
B C39 01. µF
C
IN C23, C31 20 µF
C
OUT C100 10 µF
R
SNU R17 4.7R
C
SNU C33 120 pF
DCLOCAL
CIN
MCP16301
V
IN
EN
GND
BOOST
SW
V
FB
DB
RBOOST CB
VBUCK
COUT
RTOP1
RBOT1
D
R
SNU
CSNU
L
R
TOP1
= R
BOT1

V
BUCK
V
FB
– 1




K = V
BUCK
/L

Microchip Technology dsPIC33CK Specifications

General

Brand	Microchip Technology
Model	dsPIC33CK
Category	Computer Hardware
Language	English