EV2364DF-01A中文资料
EV2364DF-01A
1.5A, 23V, 1.4MHz Dual
Step-Down Converter Evaluation Board
The Future of Analog IC Technology
TM
TM
DESCRIPTION
The EV2364DF-01A is an evaluation board for the MP2364, a dual output, monolithic step-down switch mode converter with built-in internal power MOSFETs. It achieves 1.5A continuous output current for each output over a wide input supply range with excellent load and line regulation.
The MP2364’s current mode operation provides fast transient response and eases loop stabilization.
Its fault protection includes cycle-by-cycle current limiting and thermal shutdown. In shutdown mode the regulator draws 40μA of supply current.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units Input Voltage V IN 4.75 to 23V
Output Voltage A V OUTA
3.3 V Output Voltage B
V OUTB 2.5 V
FEATURES
?
1.5A Current for Each Output
? Ceramic Input and Output Capacitors ? Up to 90% Efficiency ? Fixed 1.4MHz Frequency
?
Wide 4.75V to 23V Operating Input Range
APPLICATIONS
? Distributed Power Systems ? I/O and Core Supplies ? DSL Modems ? Set Top Boxes ? Cable Modems
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc.
EV2364DF-01A EVALUATION BOARD
(L x W x H) 2.2” x 1.6” x 0.4” (5.5cm x 4.1cm x 1.0cm) Board Number
MPS IC Number
EV2364DF-01A MP2364DF
10090
80706050
E F F I C I E N C Y (%)
0.5 1.0 1.5LOAD CURRENT (A)
MP2364_EC01
Efficiency vs Load Current
EV2364DF-01A – 1.5A, 23V, 1.4MHz DUAL STEP-DOWN CONVERTER EV BOARD TM
EVALUATION BOARD SCHEMATIC
EV2364DF-01A BILL OF MATERIALS
Qty Ref Value
Description Package Manufacturer P/N Distributor P/N
2 C1,
C6 0.47μF Ceramic Capacitor, 16V, X7R 0805 TDK:
C2012X7R1C474K
Digikey:
445-1357-1-ND
2 C2, C7 10nF Ceramic Capacitor, 50V, X7R 060
3 TDK:
C1608X7R1H103K
Digikey:
445-1311-1-ND
2 C3,
C9 22μF Ceramic Capacitor, 6.3V, X5R 1210 TDK:
C3225X5R0J226M
Digikey:
445-1404-1-ND
2 C4, C10 Do Not Stuff
1 C5 3.3nF Ceramic Capacitor, 50V, X7R 0603 Panasonic:
ECJ-1VB1H332K
Digikey:
PCC1778CT-ND
1 C8 2.2nF Ceramic Capacitor, 50V, X7R 0603 TDK:
C1608X7R1H222K
Digikey:
445-1309-1-ND
2 C11,
C12 10μF Ceramic Capacitor, 25V, X7R 1210 TDK:
C3225X7R1E106M
Digikey:
445-1434-1-ND
1 C13 82pF Ceramic Capacitor, 50V, NPO 0603 TDK:
C1608C0G1H820J
Digikey:
445-1280-1-ND
2 D1, D4 Do Not Stuff
2 D2, D
3 Schottky Diode, 30V, 2A, SMA Diodes Inc:
B230A-13
Digikey:
B230ADICT-ND
2 L1, L2 Inductor, 5uH, 2.4A, SMD Sumida:
CDRH6D28-5R0NC
1 R1 25.5k? Resistor, 1% 0603 Any Any 1 R
2 7.5k? Resistor, 5% 060
3 Any Any 3 R3, R5, R6 10k? Resistor, 1% 0603 Any Any 1 R
4 16.9k? Resistor, 1% 0603 Any Any 1 U1 DC/DC Converter, TSSOP20 MPS: MP2364DF
TM
EV2364DF-01A – 1.5A, 23V, 1.4MHz DUAL STEP-DOWN CONVERTER EV BOARD PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Silk Layer Figure 2—Top Layer
Figure 3—Bottom Layer
EV2364DF-01A – 1.5A, 23V, 1.4MHz DUAL STEP-DOWN CONVERTER EV BOARD
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications.
TM
QUICK START GUIDE
The output voltages of this board are set to 3.3V (VOUTA) and 2.5V (VOUTB). The board layout accommodates most commonly used inductors and output capacitors.
1. Attach the positive and negative ends of the first load to the VOUTA and GND pins,
respectively. If using both outputs, attach the positive and negative ends of the second load to the VOUTB and GND pins, respectively. 2. Preset the power supply output to 4.75V to 23V and turn it off.
3. Connect the positive terminal of the power supply output to the VIN pin and the negative
terminal of the power supply output to the GND pin. 4. Turn the power supply on. The MP2364 will automatically startup.
5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 2.5V to turn
on the regulator and less than 0.7V to turn it off. 6. The output voltages V OUTA and V OUTB can be changed by varying R1 and R4, respectively.
Calculate the new values by the following formulae:
?????????×=192
.0V 6R 1R OUTA
???????
??×=192
.0V 3R 4R OUTB
Where R6 = 10k ? and R3 = 10k ?
Example:
For V OUTA = 3.3V:
?=?×?=k 9.25)192
.03
.3(
10k 1R Therefore, use a 25.5k ? standard 1% value resistor.