MAX1800EVKIT Maxim Integrated, MAX1800EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1800EVKIT
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: MAX1800r

1) Make sure jumpers JU1–JU6 are connected in the 1-
2) Before loading any output, check the output voltage
MAX1800 Evaluation Kit
2
R2, R29, R31, R33
• 1.8V to 5.5V battery or power supply
• Digital voltmeter (DVM)
Q1, Q2, Q3, Q5
DESIGNATION
R37, R38, R42,
R26, R28, R30,
2 (ON) position. This ensures that all converters will
turn-on at power-up.
and output current capability shown in Table 1. See
the Startup Input Voltage vs. MAIN Output Current
R19, R22, R25
R3, R12−R15,
R5, R10, R17,
_______________________________________________________________________________________
JU7− JU12
JU1−JU6
R32, R34
R43
Q4
R1
R4
R6
L1
L2
L3
QTY
Recommended Equipment
10
6
6
1
1
1
4
1
4
1
4
1
6
1
Connections and Setup
3-pin headers
2-pin headers
1.4µH inductor
Sumida CR43-1R4
10µH inductor
Sumida CDRH6D38-100
0.5µH inductor
Sumida CR43 Type Sample
4757-T019
N-channel MOSFETs
Fairchild Semiconductor
FDN337N
P-channel MOSFET
Fairchild Semiconductor
NDS336P
200Ω ±5% resistors (1206)
40.2kΩ ±1% resistor (0603)
Shorted in the PC board
layout (0402)
(not installed)
Open, not installed (0402)
464kΩ ±1% resistor (0603)
100kΩ ±1% resistors (0603)
200kΩ ±5% resistor (0402)
DESCRIPTION
Quick Start
3) Make sure jumpers JU7–JU12 are connected if no
4) Attach a 1.8V to 5.5V battery or power supply to IN.
5) Using the DVM, measure the voltage at MAIN, LDO,
The main output (MAIN) powers the MAX1800’s internal
circuitry. MAIN must be regulated before any of the
other outputs function.
To enable MAIN, place jumper JU2 in the 1-2 position.
Apply 1.8V to 5.5V between IN and GND. The voltage
between MAIN and GND should be approximately 3.3V
if IN is <3.3V. Because the IC is powered from MAIN,
the IC does not work at maximum efficiency until MAIN
is in regulation. Thus, at low battery voltages and heavy
loads, MAIN may not have sufficient power to start. The
output current capability shown in Table 1 is valid for
input voltages down to 1.8V. The circuit operates for
R7, R8, R9, R27
DESIGNATION
R35, R36, R40,
graph in the
MAX1800 data sheet before loading MAIN.
external loads are attached to the OUT1A, OUT1B,
OUT1C, OUT2A, OUT2B, and OUT2C outputs.
OUT1_, OUT2_, OUT3 and OUT4.
R11, R16, R24
R41, R44, R45
None
R18
R20
R21
R23
R39
R46
U1
U2
T1
T2
Component List (continued)
Typical Operating Characteristics in the
QTY
12
4
3
1
1
1
1
6
1
1
1
1
1
1
Detailed Description
10kΩ ±5% resistors (0402)
301kΩ ±1% resistors (0603)
44.2kΩ ±1% resistor (0603)
4.7Ω ±5% resistor (0402)
165kΩ ±1% resistor (0603)
1MΩ ±5% resistor (0402)
3kΩ ±5% resistors (1206)
750Ω ±5% resistor (1206)
100kΩ ±5% resistor (0402)
Transformer
Sumida “Sample Number”:
6333-T330
Transformer
Sumida “Sample Number”:
6333-T329
MAX1800EHJ (32-pin TQFP)
MAX1801EKA (8-pin SOT23)
Shunts
DESCRIPTION