MAX1820 Datasheet, PDF (1/6 Pages) Maxim Integrated Products – MAX1820 Evaluation Kit

19-2146; Rev 4; 3/04
MAX1820 Evaluation Kit
General Description
The MAX1820 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board that contains
two separate buck switching-regulator circuits. The top
circuit utilizes a MAX1820 and is configured for a +0.4V
to +3.4V dynamically variable output voltage and pro-
vides up to 600mA of guaranteed current. The bottom
circuit uses a MAX1821 and is configured for a +1.5V
output that provides up to 600mA of guaranteed cur-
rent. A +2.7VDC to +5.5VDC source could be utilized to
power either circuit’s input.
The MAX1820/MAX1821 feature an internal MOSFET
switch and synchronous rectifier. The MAX1820 EV kit
demonstrates low quiescent current and high efficiency
up to 97% for maximum battery life. PWM operation at
1MHz allows the use of tiny surface-mount components.
Component Suppliers
Features
o +2.7V to +5.5V Input Range
o Output Voltages
+0.4V to +3.4V Output at 600mA (Top Circuit)
+1.5V Output at 600mA (Bottom Circuit)
o Dynamically Variable Output Voltage (Top Circuit)
o Adjustable Output Voltage Through Resistive
Voltage-Divider (Bottom Circuit)
o Internal Switch and Synchronous Rectifier
o 0.1µA (typ) IC Shutdown Current
o 1MHz PWM Switching Frequency
o Syncable to 13MHz Oscillator
o Normal and Forced PWM Mode
o All Surface-Mount Components
o Fully Assembled and Tested
SUPPLIER
Murata
Sanyo USA
Sumida
Taiyo Yuden
PHONE
770-436-1300
619-661-6835
708-956-0666
408-573-4150
FAX
770-436-3030
619-661-1055
708-956-0702
408-573-4159
PART
MAX1820EVKIT
Ordering Information
TEMP RANGE
0°C to +70°C
IC PACKAGE
10 µMAX
Component List
DESIGNATION
C1, C12
C2
C3, C7
C4, C8
C5
C6
C9
QTY
2
1
2
2
1
1
1
DESCRIPTION
10µF, 6.3V low-ESR electrolytic
capacitors (POSCAP)
Sanyo 6APA10M
4.7µF, 6.3V X5R ceramic
capacitor (0805)
Taiyo Yuden JMK212BJ475KG
330pF, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H331K
10pF, 50V COG ceramic
capacitors (0805)
Taiyo Yuden UMK107C6100DZ
0.01µF, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H103K
10µF, 6.3V X5R ceramic
capacitor (1206)
Taiyo Yuden LMK316BJ106KL
0.047µF, 16V X7R ceramic
capacitor (0603)
Taiyo Yuden EMK107BJ473KA
DESIGNATION QTY
C10, C11
2
J1, J2
0
J3, J4
2
JU1, JU2, JU4, JU5 4
JU3, JU6
2
L1, L2
2
R1
1
R2
1
R3
1
R4
1
R5, R6, R7
3
U1
1
U2
1
None
4
None
1
None
1
None
1
DESCRIPTION
1µF, 6.3V X5R ceramic
capacitors (0603)
Taiyo Yuden JMK107BJ105KA
Not installed scope probe
connectors
BNC connectors
A/D Electronics 580-002-00
3-pin headers
2-pin headers
4.1µH, 1.95A shielded inductors
Sumida CDRH5D18-4R1NC
43kΩ ±5% resistor (0805)
150kΩ ±5% resistor (0805)
20kΩ ±1% resistor (0805)
100kΩ ±1% resistor (0805)
51Ω ±5% resistors (0805)
MAX1820ZEUB (10-pin µMAX)
MAX1821EUB (10-pin µMAX)
Shunts (JU1–JU6)
MAX1820 PC board
MAX1820 data sheet
MAX1820EVKIT data sheet
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