19-1536; Rev 1; 12/99
MAX1714A Evaluation Kit
General Description
Features
The MAX1714A evaluation kit (EV kit) demonstrates
a standard 4A application circuit. This DC-DC con-
verter steps down high-voltage batteries and/or
AC adapters, generating a precision, low-voltage
rail for use as chipset, DRAM, and other low-voltage
supplies. For higher current applications up to 12A,
refer to the MAX1714A data sheet.
ꢀ +5V to +24V Input Voltage Range
ꢀ Preset 2.5V Output Voltage
ꢀ 1.0V to 5.5V Adjustable Output
ꢀ 4A Output Current
ꢀ 94% Efficient (V
= 2.5V, V
= 7V,
OUT
BATT
The MAX1714A EV kit provides a 2.5V output voltage
from a +5V to +24V battery input range. It delivers up to
4A output current with greater than 90% efficiency while
operating at a 300kHz switching frequency, and has
superior line- and load-transient response.
I
= 2A)
LOAD
ꢀ 300kHz Switching Frequency
ꢀ No Current-Sense Resistor
ꢀ Power-Good Output
This EV kit is a fully assembled and tested circuit
board. It also allows evaluation of other output voltages
in the 1.0V to 5.5V range by changing feedback resis-
tors R1 and R2.
ꢀ Low-Profile Components
ꢀ Fully Assembled and Tested
Ordering Information
PART
TEMP. RANGE
IC PACKAGE
MAX1714AEVKIT
0°C to +70°C
20 QSOP
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
JU1, JU2
2
2-pin headers
10µF, 25V ceramic capacitor (1812)
Taiyo Yuden TMK432BJ106KM or
Tokin C34Y5U1E106Z
C1
1
4.7µH power inductor
Sumida CDRH124-4R7MC (shielded),
Coiltronics UP2B-4R7 (unshielded)
L1
1
330µF, 6.3V, 45mΩ C100M
low-ESR capacitor
Sanyo 6TPB330M or
Dual N-channel MOSFET
Fairchild FDS6982A
C2
1
N1A, N1B
1
0
Kemet T510X337M010AS
R1, R2,
R3, R8, R9
C3
C4
1
1
0.1µF ceramic capacitor (0805)
0.22µF ceramic capacitor (1206)
Not installed
R4
R5, R6
R7
1
2
1
1
1
1
1
1
1
100kΩ 5% resistor (0805)
1MΩ 5% resistors (0805)
20Ω 5% resistor (0805)
200Ω 5% resistor (0805)
MAX1714AEEP (20-pin QSOP)
Shunt (JU1)
4.7µF, 10V, X5R ceramic cap (1206)
Taiyo Yuden LMK316BJ475ML
C5
1
3.3µF, 10V, X5R ceramic cap (1206)
Taiyo Yuden LMK316BJ335ML
C6
C7
1
1
R8
U1
2200pF ceramic capacitor (0805)
None
None
None
None
1A, 30V Schottky diode
Nihon EP10QY03 or EC10QS03 or
Motorola MBRS130LT3
MAX1714A PC board
D1
D2
1
1
MAX1714A data sheet
MAX1714A EV kit data sheet
100mA, 30V Schottky diode
Central Semiconductor CMPSH-3
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.