MAX668EVKIT+ Maxim Integrated, MAX668EVKIT+ Datasheet

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MAX668EVKIT+

Manufacturer Part Number
MAX668EVKIT+
Description
Power Management IC Development Tools Evaluation Kit for the MAX668 MAX669
Manufacturer
Maxim Integrated
Series
MAX668, MAX669r
Datasheet
1.MAX668EVKIT.pdf (6 pages)

Specifications of MAX668EVKIT+

Output Voltage
3 V to 28 V
Output Current
1000 mA
The MAX668 evaluation kit (EV kit) combines a con-
stant-frequency, pulse-width-modulation (PWM) step-
up controller with an external N-channel MOSFET and
Schottky diode to provide a regulated output voltage.
The EV kit accepts a +3V to V
to a +12V output for currents up to 1A, with greater than
90% conversion efficiency. The EV kit operates at
500kHz, allowing the use of small external components.
The MAX668 EV kit is a fully assembled and tested sur-
face-mount circuit board. This EV kit can also be con-
figured for the application circuits listed in the EV Kit
Application Circuit Capabilities table. For input voltages
below 3V and down to 1.8V, replace the MAX668 with a
MAX669. The MAX669 must always operate in boot-
strapped mode (JU2 shunt across pins 1 and 2).
19-4778; Rev 0a; 8/98
Note: To evaluate the MAX669, request a MAX669EUB free
sample with the MAX668EVKIT.
Note: Design information for these applications is included.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX668EVKIT
V
The shaded row shows EV kit configuration as shipped.
IN(MIN)
PART
1.8
1.8
2.5
(V)
12
3
3
3
EV Kit Application Circuit
________________________________________________________________ Maxim Integrated Products
TEMP. RANGE
Ordering Information
0°C to +70°C
General Description
V
(V)
OUT
12
24
12
12
36
24
5
OUT
input and converts it
Capabilities
10 µMAX
IC PACKAGE
I
0.65
0.02
OUT
(A)
0.4
0.1
0.5
3
1
MAX668 Evaluation Kit
DESIGNATION
+3V to V
+12V or Adjustable Output Voltage
Output Current Up to 1A
N-Channel External MOSFET
4µA IC Shutdown Current
500kHz Switching Frequency
Surface-Mount Components
Fully Assembled and Tested
JU1, JU2
C4, C8
None
None
None
JU3
C1
C5
C2
C3
C7
C6
D1
N1
R1
R2
R3
R4
U1
L1
OUT
QTY
Input Range (as shipped)
1
1
1
1
2
1
0
1
1
1
1
1
1
1
1
2
1
2
1
1
68µF, 20V, low-ESR tantalum cap
Sprague 593D686X0020E2W or
AVX TPSE686M020R0150
120µF, 20V, low-ESR tantalum cap
Sprague 594D127X0020R2T
0.1µF ceramic capacitor
0.22µF ceramic capacitor
1µF ceramic capacitors
220pF ceramic capacitor
Not installed
3A Schottky diode
Hitachi HRF302A or
Motorola MBRS340T3
4.7µH power inductor
Sumida CDRH104-4R7 (shielded),
Coiltronics UP2B-4R7, or
Coilcraft DO3316P-472
N-channel MOSFET
Fairchild FDS6680 or
International Rectifier IRF7801
0.020Ω, 1%, 1/2W resistor
Dale WSL-2010-R020F or
IRC LR2010-01-R020F
218kΩ, 1% resistor
24.9kΩ, 1% resistor
100kΩ, 1% resistor
MAX668EUB
3-pin headers
2-pin header
Shunts (JU1, JU2)
MAX668/MAX669 PC board
MAX668/MAX669 data sheet
Component List
DESCRIPTION
Features
1

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MAX668EVKIT+ Summary of contents

Page 1

... Note: Design information for these applications is included. The shaded row shows EV kit configuration as shipped. ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. MAX668 Evaluation Kit ...

Page 2

MAX668 Evaluation Kit Component Suppliers SUPPLIER PHONE AVX 803-946-0690 CoilCraft 708-639-6400 Coiltronics 561-241-7876 Dale-Vishay 402-564-3131 Fairchild 408-721-2181 Hitachi 888-777-0384 International 310-322-3331 Rectifier IRC 512-992-7900 Motorola 602-303-5454 Siliconix 408-988-8000 Sprague 603-224-1961 Sumida 708-956-0666 Vishay/Vitramon 203-268-6261 Note: Please indicate that you are ...

Page 3

Table 1. Jumper JU1 Functions SHUNT LOCATION 1 and 2 2 and 3 Not installed Table 2. Jumper JU2 Functions SHUNT LOCATION 1 and 2 2 and 3 Table 3. Jumper JU3 Functions SHUNT LOCATION On Connected to V Off ...

Page 4

MAX668 Evaluation Kit Table 4. Components for Alternate Application Circuits JU2 BOOT- MAXIM STRAPPED OUT OUT PART (MIN) (V) (A) vs. (V) NO. NON-BOOT- STRAPPED 1 & 2 1.8 12 0.4 MAX669 Bootstrapped 1 & 2 ...

Page 5

Figure 1. MAX668 EV Kit Schematic _______________________________________________________________________________________ MAX668 Evaluation Kit 5 ...

Page 6

... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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