MAX1845EVKIT Maxim Integrated, MAX1845EVKIT Datasheet

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MAX1845EVKIT

Manufacturer Part Number
MAX1845EVKIT
Description
Power Management IC Development Tools Evaluation Kit for the MAX1845
Manufacturer
Maxim Integrated
Series
MAX1845r
Datasheet
1.MAX1845EVKIT.pdf (6 pages)
The MAX1845 evaluation kit (EV kit) demonstrates the
MAX1845’s standard application circuit. This DC-DC
converter steps down high-voltage batteries and/or AC
adapters, generating precision, low-voltage rails for use
as chipset, DRAM supplies, CPU core, and IO supplies.
The MAX1845 EV kit provides dual 1.8V and 2.5V output
voltages from a 7V to 22V battery input range. It delivers
up to 4A output current for the 2.5V output and 7A for
the 1.8V output, with greater than 90% efficiency. The
EV kit operates at 255kHz/345kHz switching frequency
and has superior line- and load-transient response.
This EV kit is a fully assembled and tested circuit board.
It also allows the evaluation of other output voltages in
the 1.0V to 5.5V range by changing feedback resistors
R1–R4.
19-2101; Rev 0; 8/01
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
C14, C15, C17,
MAX1845EVKIT
DESIGNATION
C10, C11
C1−C5
C6−C9
D2, D3
C12
C13
C16
C19
C18
D1
L1
PART
________________________________________________________________ Maxim Integrated Products
QTY
5
4
2
1
1
0
1
1
1
2
1
TEMP. RANGE
Ordering Information
0
General Description
o
C to +70
10µF, 25V ceramic capacitors
(1812)
Taiyo Yuden TMK432BJ106KM or
TDK C4532X5R1E106M
470µF, 6.3V, 30mΩ low-ESR
tantalum capacitors
Kemet T510X477M006AS
0.1µF ceramic capacitors (0805)
1µF, 10V X5R ceramic capacitor
(0805)
Taiyo Yuden LMK212BJ105MG
3.3µF, 10V X5R ceramic capacitor
(1206)
Taiyo Yuden LMK316BJ335ML
Not installed
0.22µF ceramic capacitor (1206)
4.7µF, 16V tantalum capacitor
Sprague 595D475X0016A2B
100m A, 30V d ual S chottky d i od e
C entr al S em i cond uctor C M P S H - 3A
1A, 30V Schottky diodes
Nihon EP10QY03 or
Toshiba CRS02
2.2µH power inductor
Panasonic ETQP6F2R2SFA or
Sumida CDRH127-2R4
o
C
DESCRIPTION
28 QSOP
IC PACKAGE
MAX1845 Evaluation Kit
o 7V to 22V Input Voltage Range
o 1.8V and 2.5V Output Voltages
o 1.0V to 5.5V Adjustable Outputs
o 4A Output Current (2.5V Output)
o 7A Output Current (1.8V Output)
o Adjustable Current-Limit Threshold
o 255kHz/345kHz Switching Frequency
o Power-Good Output
o Over- and Undervoltage Protection
o 28-Pin QSOP Package
o Low-Profile Components
o Fully Assembled and Tested
R1−R4, R7, R8,
DESIGNATION
JU1, JU2, JU3
N3A, N3B
R10−R14
R9, R15
None
None
None
None
None
R19
R20
N1
N2
R5
R6
U1
L2
QTY
1
1
1
1
0
1
1
2
1
1
1
3
3
4
1
1
1
4.7µH power inductor
Sumida CDRH124-4R7MC
N-channel MOSFET
International Rectifier IRF7807 or
Fairchild FDS6612A
N-channel MOSFET
International Rectifier IRF7805 or
Fairchild FDS6670A
Dual N-channel MOSFET
Fairchild FDS6982A
Not installed
0.005Ω ±1%, 1W resistor (2512)
Dale WSL-2512-R005F or
Panasonic ERJM1WSF5MOU
100kΩ ±5% resistor (0805)
1MΩ ±5% resistors (0805)
0.010Ω ±1%, 1/2W resistor (2010)
Dale WSL-2010-R010F
10Ω ±5% resistor (0805)
MAX1845EEI (28-pin QSOP)
3-pin headers
Shunts
Rubber feet
MAX1845 PC board
MAX1845 data sheet
MAX1845EVKIT data sheet
Component List
DESCRIPTION
Features
1

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MAX1845EVKIT Summary of contents

Page 1

... Dale WSL-2512-R005F or Panasonic ERJM1WSF5MOU 100kΩ ±5% resistor (0805) 1 1MΩ ±5% resistors (0805) 2 0.010Ω ±1%, 1/2W resistor (2010) 1 Dale WSL-2010-R010F 10Ω ±5% resistor (0805 MAX1845EEI (28-pin QSOP) 3 3-pin headers 3 Shunts 4 Rubber feet 1 MAX1845 PC board 1 MAX1845 data sheet 1 MAX1845EVKIT data sheet 1 ...

Page 2

MAX1845 Evaluation Kit Component Suppliers SUPPLIER PHONE Central Semiconductor 516-435-1110 Dale-Vishay 402-564-3131 Fairchild 408-721-2181 International Rectifier 310-322-3331 Kemet 408-986-0424 Nihon 847-843-7500 Panasonic 714-373-7939 Sumida 708-956-0666 Taiyo Yuden 408-573-4150 TDK 847-390-4373 Toshiba 949-455-2000 Note: Please indicate that you are using the ...

Page 3

Table 5. Jumpers JU5/JU6/JU7 Functions (Switching-Frequency Selection) JU5 JU6 Not installed Not installed Not installed Installed Installed Not installed Not installed Not installed IMPORTANT: Don’t change the operating frequency without first recalculating component values because the frequency has a signifi- ...

Page 4

MAX1845 Evaluation Kit R L Figure 1. MAX1845 EV Kit Schematic 4 _______________________________________________________________________________________ ...

Page 5

Figure 2. MAX1845 EV Kit Component Placement Guide—Component Side Figure 4. MAX1845 EV Kit PC Board Layout—Internal GND Plane (Layer 2) _______________________________________________________________________________________ MAX1845 Evaluation Kit Figure 3. MAX1845 EV Kit PC Board Layout—Component Side Figure 5. MAX1845 EV Kit PC ...

Page 6

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are 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 © 2001 Maxim Integrated Products Figure 7. MAX1845 EV Kit Component Placement Guide— ...

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