1702.PDF

(91 KB) Pobierz
MAX1624 Evaluation Kit
_______________General Description
The MAX1624 evaluation kit (EV kit) provides a digitally
programmable output voltage between 1.1V and 3.5V
from a 5V input supply. It delivers up to 11.5A output
current with greater than 90% efficiency. The MAX1624
EV kit features 1% output accuracy. The MAX1624 fea-
tures a resistor-programmable switching frequency
from 100kHz to 1MHz, as well as current-mode opera-
tion for superior load- and line-transient response. This
EV kit is a fully assembled and tested circuit board. For
a low-cost version of this kit that includes the Intel V
RM
connector and aluminum-electrolytic filter capacitors,
order the MAX1624VRMEVKIT.
____________________________Features
o
4.5V to 5.5V Input Voltage Range
o
1.1V to 3.5V Output Voltage
o
11.5A Output Current
o
Efficiency = 90%, V
IN
= 5V,
V
OUT
= 2.5V @ I
OUT
= 10A
o
Selectable 0.5%, 1%, 2% AC Load Regulation
o
Power-OK Output
o
Glitch-Catcher™ Provides Excellent Load-
Transient Response
o
500kHz Switching Frequency
o
24-Pin SSOP Package
o
Low-Profile Components
Evaluates: MAX1624
______________Ordering Information
PART
MAX1624EVKIT
MAX1624VRMEVKIT
TEMP. RANGE
0°C to +70°C
0°C to +70°C
BOARD TYPE
Surface Mount
Through Hole
_____________________________________________________________Component List
DESIGNATION QTY
C1, C2, C3
C4
C5, C6, C7
C8, C9, C10
C11, C12
3
0
3
3
2
DESCRIPTION
100µF, 10V electrolytic capacitors
Sanyo 10SL100M
Open
220µF, 4V electrolytic capacitors
Sanyo 4SP220M
0.1µF ceramic capacitors
4.7µF, 16V tantalum capacitors
Sprague 595D475X0016A2T
2.2µF ceramic capacitor
United Chemicon/Marcon
THCR30E1E225Z
4700pF ceramic capacitors
1µF ceramic capacitor
22µF ceramic capacitor
TDK C5650Y5U1E226M
1000pF ceramic capacitor
0.056µF ceramic capacitor
1
Schottky diode
Central Semiconductor CMPSH-3
0.5µH power inductor
Coiltronics UP4-R47 or
Coilcraft DO5022P-501HC
N-channel MOSFETs (D
2
PAK)
International Rectifier IRL3103S
R1, R2
2
DESIGNATION QTY
U2
1
DESCRIPTION
N- and P-channel MOSFET (SO-8)
International Rectifier IRF7107
0.012Ω, 1%, 1W resistors
Dale WSL-2512-R012-F or
IRC LR2512-01-R012-F
0.5Ω, 5%, 1/2W resistor
Dale WSL-2010-R5-J or
IRC LR2010-01-R5-J
100Ω, 5% resistor
40.2kΩ, 1% resistor
100kΩ, 5% resistors
39Ω, 5% resistors
Open
1kΩ, 5% resistor
MAX1624EAG
4-pin header
2-pin header
Shunt
Dip-10 dip switch
MAX1624 PC board
MAX1624 data sheet
1
R3
R4
R5
R6–R11
R12, R13
R14, R15
R16
U1
JU1
JU2
None
SW1
None
None
1
1
1
6
2
0
1
1
1
1
1
1
1
1
C13
C14, C15
C16
C17
CC1
CC2
D1
1
2
1
1
1
L1
1
N1, N2
2
________________________________________________________________
Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX1624 Evaluation Kit
Evaluates: MAX1624
______________Component Suppliers
SUPPLIER*
AVX
Central
Semiconductor
Coilcraft
Dale-Vishay
International Rectifier
IRC
Motorola
Sanyo
Siliconix
Sprague
Sumida
PHONE
(803) 946-0690
(516) 435-1110
(708) 639-6400
(402) 564-3131
(310) 322-3331
(512) 992-7900
(602) 303-5454
(619) 661-6835
(408) 988-8000
(603) 224-1961
(847) 956-0666
FAX
(803) 626-3123
(516) 435-1824
(708) 639-1469
(402) 563-6418
(310) 322-3332
(512) 992-3377
(602) 994-6430
(619) 661-1055
(408) 970-3950
(603) 224-1430
(847) 956-0702
0
0
0
0
0
0
0
0
1
1
1
1
–
1
0
–
1
1
–
1
0
–
1
1
–
1
0
–
0
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
D4 D3 D2 D1 D0
1
1
1
0
0
–
0
0
–
0
0
–
0
1
–
Table 1. MAX1624 Output-Voltage
Adjustment Settings (Abbreviated)
OUTPUT VOLTAGE
(V)
3.5
3.4
Decreases in 100mV
Intel-
increments
compatible codes
2.1
No CPU (off)
1.9
1.8
Decreases in 100mV
increments
1.2
1.1
1.1
1.1
No CPU (off)
Non-Intel-
compatible codes
COMPATIBILITY
*
Please indicate that you are using the MAX1624 when
contacting these component suppliers.
_________________________Quick Start
The MAX1624 EV kit is fully assembled and tested.
Follow these steps to verify board operation.
Do not
turn on the power supply until all connections are
completed.
1) Connect a 5V supply voltage to the VIN pad. The
ground connects to the GND pad.
2) Connect a voltmeter and load, if any, to the VOUT
pad.
3) Turn on the power supply to the board. Verify that
the output voltage is 0V.
4) Set switch SW1 per Table 1 to get the desired output
voltage.
Table 2. Jumper JU1 Functions
SHUNT
LOCATION
1&4
1&3
1&2
LG PIN
Connected to GND
Connected to REF
Connected to V
CC
AC LOAD
REGULATION
(%)
0.5
1
2
_______________Detailed Description
Jumper Selection
The 3-pin header JU1 selects the loop gain. Table 2
lists the selectable jumper options. JU1 allows the user
to trade off AC load regulation, transient response, and
output filter capacitor size. Load regulation can be set
to 0.5%, 1%, and 2%. The default value is 1%.
The 2-pin header JU2 selects the shutdown mode.
Table 3 lists the selectable jumper options.
Table 3. Jumper JU2 Functions
SHUNT
LOCATION
On
Off
REF PIN
Connected to GND
Connected to REF
MAX1624 OUTPUT
Shutdown mode,
V
OUT
= 0V
MAX1624 enabled
2
_______________________________________________________________________________________
VIN
4.5V TO 5.5V
C8
0.1µF
R4
100Ω
L
R
D1
1 CMPSH-3 2
C1
100µF
10V
C2
100µF
10V
C3
100µF
10V
V
CC
C11
4.7µF, 16V
C14
4700pF
9
20
V
DD
CSH
C15
4700pF
LG
R2
0.012Ω
4
R15
5
C9
0.1µF
L1
0.5µH
2
21
22
19
2
1
12
R16
1k
CC1
1000pF
CC2
0.056µF
7
8
U2A
IRF7107
3
R14
1
N2
IRL3103S
C4
OPEN
C5
220µF
4V
C6
220µF
4V
C7
220µF
4V
R3
0.5Ω
6
N1
IRL3103S
U2B
IRF7107
3
R1
0.012Ω
C16
1µF
V
CC
C10
0.1µF
8
JU1
R6
100k
VIN
4
C12
4.7µF
16V
3
R12
39Ω
Figure 1. MAX1624 EV Kit Schematic
U1
MAX1624
DH
BST
1
2
PWROK
REF
LX
DL
DO
PGND
PDRV
6
7
NDRV
R9
100k
VIN
FB
5
D2
CC1
CC2
FREQ
D4
AGND
11
R5
40.2k
1%
15
14
13
8
17
D3
R11 VIN
100k
9
16
R10 VIN
100k
18
D1
23
10
VIN
JU2
7
R8
100k
VIN
C13
2.2µF
24
CSL
3
R13
39Ω
C17
*
VOUT
22µF
V
CC
2%
2
3 1%
1
4
0.5%
PWROK
ON/OFF
R7
100k
D0
5
6
SW1E
D1
4
SW1D
D2
3
SW1C
D3
*
MODELS LOCAL CPU BYPASS CAPACITORS.
2
SW1B
D4
10
1
Evaluates: MAX1624
_______________________________________________________________________________________
SW1A
MAX1624 Evaluation Kit
3
MAX1624 Evaluation Kit
Evaluates: MAX1624
1.0"
1.0"
Figure 2. MAX1624 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX1624 EV Kit Component Placement Guide—
Solder Side
1.0"
1.0"
Figure 4. MAX1624 EV Kit PC Board Layout—Component Side
Figure 5. MAX1624 EV Kit PC Board Layout—Solder Side
1.0"
1.0"
Figure 6. MAX1624 EV Kit PC Board Layout—
Internal GND Plane (layer 2)
Figure 7. MAX1624 EV Kit PC Board Layout—
Internal Signal Plane (layer 3)
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.
4
_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin