View MAX1533EVKIT_294255.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-3528; Rev 0; 3/05
MAX1533 Evaluation Kit
General Description
The MAX1533 evaluation kit (EV kit) demonstrates the MAX1533's standard application circuit. This dual-PWM synchronous DC-DC converter steps down high-voltage batteries and/or AC adapters, generating main supplies for notebook computers. The MAX1533 EV kit operates at 300kHz switching frequency and provides dual 5V and 3.3V output voltages from a 5V to 24V battery input range. It delivers up to 5A output current for the 5V output and 6A for the 3.3V output with 97% efficiency. Both outputs are adjustable between 1V and 5.5V by changing feedback resistors R19-R22. The MAX1533 also has an internal fixed 3.3V and 5V linear regulator capable of supplying 100mA. The MAX1533 EV kit operates at 300kHz switching frequency. 6V to 24V Input Range Internal 5V and 3.3V Linear Regulators with 100mA Load Capability Output Voltage: 3.3V at 5A (Adjustable from 1V to 5.5V) 5V at 5A (Adjustable from 1V to 5.5V) 300kHz Switching Frequency (Selectable 200kHz/300kHz/500kHz) Power-Good Output Selectable Over- and Undervoltage Protection 32-Pin Thin QFN Package Fully Assembled and Tested
Features
Evaluates: MAX1533
Ordering Information
PART MAX1533EVKIT TEMP RANGE 0C to +70C IC PACKAGE 32 Thin QFN
Component List
DESIGNATION C1 C2, C3 C4, C6 QTY 0 2 0 DESCRIPTION Not installed, capacitor (1812) 10F 10%, 25V X7R ceramic capacitors (1812) TDK C4532X7R1E106K Not installed, D-size capacitors 150F 20%, 6.3V, 25m POSCAP/KO-CAP Kemet T520D157M006ASE025 Sanyo 6TPE150M 220F 20%, 6.3V, 25m POSCAP/KO-CAP Kemet T520V227M006ASE025 Sanyo 6TPE220M 1F 10%, 10V, X5R ceramic capacitors (0603) Murata GRM188R61A105K TDK C1608X5R1A105K 0.1F 10%, 25V X7R ceramic capacitors (0603) Murata GRM188R71E104K TDK C1608X7R1E104K 0.22F 10%, 16V X7R ceramic capacitor (0603) Murata GRM188R71E224K TDK C1608X7R1C224K C15, C19 2 C13 1 DESIGNATION QTY DESCRIPTION 0.022F 10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H223K TDK C1608X7R1H223K 10F 20%, 6.3V X5R ceramic capacitors (0805) Murata GRM21BR60J106M TDK C2012X5R0J106M Not installed, capacitor (0805) 4.7F 10%, 25V X7R ceramic capacitor (1210) TDK C3225X7R1E475K Not installed, capacitors (0603) 2A, 30V, SMA Schottky diodes Central Semiconductor CMSH2-40M Diodes Inc. B230A 100mA, 30V, dual Schottky diode, common anode, SOT23 Central Semiconductor CMPSH-3A 3-pin headers, 0.1in center 6-pin header, 2x3, 0.1in center Not installed, 2-pin jumpers (0603)
C5
1
C16 C23 C24, C25 D1, D2
0 1 0 2
C7
1
C9, C11, C18
3
D3 JU1-JU6 JU8 JU9, JU10, JU12, JU14
1 6 1 0
C10, C14, C17
3
C12
1
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX1533 Evaluation Kit Evaluates: MAX1533
Component List (continued)
DESIGNATION L1, L2 N1, N3 N2, N4 QTY 2 2 2 DESCRIPTION 5.8H, 8.6A, 16.2m inductors Sumida CDRH127/LD-5R8NC 8.4A, 30V n-channel MOSFETs, SO-8 Fairchild FDS6612A 13A, 30V n-channel MOSFETs, SO-8 Fairchild FDS6670A 0.01 1%, 0.5W sense resistor (2010) IRC LRC-LRF2010-01-R010-F Vishay Dale WSL2010 0.010 1.0% 20 5% resistor (0603) Not installed, resistors (0603) 100k 5% resistor (0603) Not installed, resistor (1206) MAX1533ETJ, 32-pin thin QFN (5mm x 5mm) MAX1533 EV Kit PC board Shunts
Quick Start
Recommended Equipment
Before beginning, the following equipment is recommended: * 6V to 24V, 100W, DC power supply * Dummy loads capable of sinking 5A * 3 voltmeters * An oscilloscope
Procedure
The MAX1533 EV kit is a fully assembled and tested surface-mount board. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed. 1) Verify that the shunts are in the following positions: JU1 = 1-2 (overvoltage protection disabled) JU2 = 1-2 (MAX1533 enabled) JU3 = 1-2 (undervoltage protection disabled) JU4 = 1-2 (PWM mode) JU5 = 1-2 (5V main output enabled) JU6 = 1-2 (3.3V main output enabled) JU8 = 3-4 (300kHz operation) 2) Connect the power supply across the VIN and PGND pads. 3) Connect a voltmeter across the 5V_MAIN and PGND pads. 4) Connect a voltmeter across the 3.3V_MAIN and PGND pads. 5) Turn on the power supply. 6) Verify the output voltages.
R1, R2
2
R3 R4-R12, R16, R19-R24 R14 R15 U1 None None
1 0 1 0 1 1 7
Component Suppliers
SUPPLIER Central Semiconductor Diodes Incorporated Fairchild Semiconductor IRC (International Resistive Company) Kemet Murata Sanyo Sumida TDK Vishay PHONE 631-435-1110 805-446-4800 888-522-5372 361-992-7900 864-963-6300 770-436-1300 619-661-6835 847-545-6700 847-803-6100 402-564-3131 FAX 631-435-1824 805-446-4850 -- 361-992-3377 864-963-6322 770-436-3030 619-661-1055 847-545-6720 847-390-4405 402-563-6296 WEBSITE www.centralsemi.com www.diodes.com www.fairchildsemi.com www.irctt.com www.kermit.com www.murata.com www.sanyodevice.com www.sumida.com www.component.tdk.com www.vishay.com
Note: Indicate that you are using the MAX1533 when contacting these suppliers. 2 _______________________________________________________________________________________
MAX1533 Evaluation Kit Evaluates: MAX1533
Table 1. Jumper Selection
FUNCTION OVP SHDN UVP SKIP ON5 ON3 JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JUMPER POSITON 1-2* 2-3 1-2* 2-3 1-2* 2-3 1-2* 2-3 1-2* 2-3 1-2* 2-3 DESCRIPTION Disables overvoltage protection Enables overvoltage protection Enables the MAX1533 Places the MAX1533 in shutdown Disables undervoltage protection Enables undervoltage protection Places the MAX1533 in low-noise forced-PWM mode Places the MAX1533 in high-efficiency pulse-skipping mode at light loads Enables the 5V main output Disables the 5V main output Enables the 3.3V main output Disables the 3.3V main output
*Default position.
Detailed Description
3.3V_MAIN Output Voltage Setting
The MAX1533 EV kit is shipped with FB3 connected to GND, which sets the 3.3V_MAIN voltage to 3.3V. To change the output voltage to a value between 1V and 5.5V, set R20 equal to 10k 1% and calculate R19 using the equation: R19 = R20 [(VOUT/VFB3) - 1] where VFB3 = 1V. For an output voltage of 1V, place a short across R19 and leave R20 open.
Frequency Selection
The MAX1533 operates at 200kHz/300kHz/500kHz switching frequency. The EV kit is shipped with the frequency set to 300kHz. Move the shunt on JU8 to select a different switching frequency (see Table 2).
Table 2. Frequency Selection
FREQUENCY (kHz) 200 300* 500 FSEL (JU8) GND (1-2) REF (3-4) VCC (5-6)
5V_MAIN Output Voltage Setting
The MAX1533 EV kit is shipped with the FB5 connected to GND, which sets the 5V_MAIN voltage to 5V. To change the output voltage to a value between 1V and 5.5V, set R22 equal to 10k 1% and calculate R21 using the equation: R21 = R22 [(VOUT / VFB5) - 1] where VFB5 = 1V. For an output voltage of 1V, place a short across R21 and leave R22 open.
*Default position. Note: Do not change the operating frequency without first recalculating component values because the frequency has a significant effect on preferred inductor value, peak current-limit level, MOSFET heating, PFM/PWM switchover point, output noise, efficiency, and other critical parameters.
_______________________________________________________________________________________
3
MAX1533 Evaluation Kit Evaluates: MAX1533
LDO5 VIN VIN R4 SHORT VCC VCC C1 OPEN 1 JU3 REF R5 OPEN 2 3 R3 20 VCC C9 1F VCC 1 JU1 2 15 3 11 8 7 4 VCC R6 OPEN 7 8 BST5 4 1 3 2 BST5 C10 0.1F 6 5 D1 1 3 7 8 N2 FDS6670A 4 2 JU10 5V_MAIN 5V_MAIN C11 1F C4 OPEN C5 150F R1 0.01 VIN R11 OPEN R12 OPEN REF VCC JU8 LD03 VIN 1 JU2 2 3 LDO5 1 2 JU4 3 32 SHDN 26 R7 R9 OPEN SHORT REF R8 OPEN 5 R10 SHORT 29 30 ILIM5 UVP VCC C14 0.1F 23 LDO5
LDO5
C15 10F R15 SHORT C23 4.7F C16 OPEN
VIN 3 D3 L 1 BST5 VIN R 2
OVP
IN
27
U1
GND ILIM3
BST3
13 R16 SHORT 12 BST3 14 C17 0.1F 7 8 6 5 D2 2 1 3 JU12 R2 0.01 R24 OPEN C25 OPEN L2 5.8H BST3 N3 FDS6612A 4 7 8 6 5 C3 10F
C2 10F
MAX1533
DH3
2
1 3
N1 FDS6612A
6 5
LX3 BST5 DH5 DL3 28 LX5 PGND
20 21
N4 FDS6670A 4
L1 5.8H
R23 OPEN C24 OPEN
22
DL5
CSH3
16
3.3V_MAIN 3.3V_MAIN C6 OPEN C7 220F C18 1F
CSH5
CSL3 LDO3
17 19 C19 10F LDO5
JU14 LDO3
JU9
25 CSL5
3.3V_MAIN 31 SKIP ON3 2 1 2 18 5V_MAIN R20 SHORT R21 OPEN FB5 PGDLY 9 24 R22 SHORT JU6 3 R19 OPEN
PGND
PGND
3 LDO5 1 R14 100k JU5 2 3 10 GND 1
FSEL
FB3
ON5
PGOOD PGND
PGOOD REF 6 REF C12 0.22F
C13 0.022F
Figure 1. MAX1533 EV Kit Schematic
4
_______________________________________________________________________________________
MAX1533 Evaluation Kit Evaluates: MAX1533
Figure 2. MAX1533 EV Kit Component Placement Guide-- Component Side
Figure 3. MAX1533 EV Kit PC Board Layout--Component Side
_______________________________________________________________________________________
5
MAX1533 Evaluation Kit Evaluates: MAX1533
Figure 4. MAX1533 EV Kit PC Board Layout--Layer 2
Figure 5. MAX1533 EV Kit PC Board Layout--Layer 3
6
_______________________________________________________________________________________
MAX1533 Evaluation Kit Evaluates: MAX1533
Figure 6. MAX1533 EV Kit PC Board Layout--Solder Side
Figure 7. MAX1533 EV Kit Component Placement Guide-- Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX1533EVKIT

	To Download MAX1533EVKIT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .