19-1211; Rev 0; 3/97
MAX1630/MAX1631/MAX1632 Evaluation Kits
_______________General Description
The MAX1630/MAX1631/MAX1632 evaluation kits (EV kits) each consist of one of three preassembled and tested evaluation boards (EV boards) that embody the
standard application circuits. The MAX1630 and
MAX1632 EV boards provide the triple-output 3.3V/5V/
12V circuit, and the MAX1631 EV board provides the dual-output 3.3V/5V circuit.
All three use the same PC board but have different components to accommodate different input voltage ranges. The main differences between the MAX1630 and MAX1632 EV boards are in the turns ratio (1:4 or
1:2.2) and in the location of the transformer connection
(3.3V side or 5V side). Connecting the transformer to the 3.3V side allows lower input voltage. Connecting the transformer to the 5V side provides slightly better efficiency and lower stress voltages.
These circuits are configured to deliver up to 3A of out-
put current on each of the main PWM outputs with greater than 90% efficiency. The MAX1630/MAX1631/ MAX1632 EV kits can also be used to evaluate other output voltages.
____________________________Features
Battery Range: 5.2V to 20V (MAX1630)
5.2V to 28V (MAX1631)
6.5V to 28V (MAX1632)
Outputs: 3.3V at 3A 12V at 120mA
5V at 3A 5V at 30mA Keep-Alive
1:4 Transformer (MAX1630)
1:2.2 Transformer (MAX1632)
Adjustable 2.5V to 5.5V Outputs (optional resistor divider)
Precision 2.5V Reference Output
Oscillator Sync Input
Low-Noise Mode Control Input (SKIP)
Power-Good Monitor (RESET output)
Fully Assembled and Tested
______________Ordering Information
________________________________Components Common to All Three EV Kits
DESIGNATION
QTY
DESCRIPTION
C1, C7, C21, C22, C25
5
0.1μF ceramic capacitors
C2, C3, C12, C13, C20
5
220μF, 10V, low-ESR tantalum caps
Sprague 594D227X0010D2T or
595D227X0010R2T
C5, C6, C15, C16
4
10μF, 30V electrolytic capacitors
Sanyo OS-CON 30SC10M
C8
1
4.7μF, 25V ceramic capacitor United Chemicon/Marcon THCR40E1E475Z
C9, C14
2
4.7μF, 16V tantalum capacitors
Sprague 595D475X0016A2B
C10, C18, C23
3
0.01μF ceramic capacitors
C17
1
0.22μF ceramic capacitor
C19
0
Open
C24
1
4.7μF, 35V tantalum capacitor
Sprague 595D475X0035C2B or
5950475X0035B2B
D1, D5, D7, D8
4
1A, 40V Schottky diodes Nihon EC10QS04 or Motorola MBRS140T3
Maxim Integrated Products 1
For free samples & the latest literature: , or phone 1-800-998-8800
MAX1630/MAX1631/MAX1632 Evaluation Kits
MAX1630 EV Kit
Additional Components
MAX1631 EV Kit
Additional Components
DESIGNATION
QTY
DESCRIPTION
C4, C11
0
Open
D2, D4
0
Open
JU1, JU3–JU6
5
2-pin headers
JU5
1
Shunt
JU10, JU11
2
Short
L1, L2
2
10μH power inductors
Sumida CDRH125-100 (shielded) or
Coiltronics UP2-100 or
Coilcraft DO3316P-103
U1
1
MAX1631 (SSOP-28) Maxim MAX1631CAI
Component Suppliers
MAX1632 EV Kit
Additional Components
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