MAX17501BTEVKIT [MAXIM]
Operates from a 6V to 60V Input Supply;
| 型号： | MAX17501BTEVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Operates from a 6V to 60V Input Supply |
| 文件： | 总10页 (文件大小：1255K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
General Description
Features
The MAX17501B/MAX17501F evaluation kits (EV kits)
provide proven designs to evaluate the MAX17501B/
MAX17501F high-efficiency, high-voltage, synchronous
step-down DC-DC converters. The EV kits use these
devices to generate a fixed 5V at load currents up to
500mA from a 6V to 60V input supply. The MAX17501B
supports a PFM control scheme with high light-load
efficiency, while the MAX17501F features a forced-
PWM control scheme that provides constant switching-
frequency operation at all load and line conditions.
S Operates from a 6V to 60V Input Supply
S 5V Fixed Output Voltage
S 500mA Output Current
S 600kHz Switching Frequency
S Enable/UVLO Input
S Resistor-Programmable UVLO Threshold
S Open-Drain RESET Output
S Overcurrent and Overtemperature Protection
S PFM/PWM (MAX17501B EV Kit)
S PWM (MAX17501F EV Kit)
S Proven PCB Layout
S Fully Assembled and Tested
Ordering Information appears at end of data sheet.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
3-pin header
JU1
1
1FF Q10%, 100V X7R ceramic
capacitor (1206)
Murata GRM31CR72A105KA01L
C1
C2
C3
C4
C7
1
1
1
1
1
47FH, 1.4A inductor
(6mm x 6mm x 3.5mm)
Coilcraft LPS6235-473ML
L1
1
1FF Q10%, 6.3V X7R ceramic
capacitor (0603)
Murata GRM188R70J105K
R1
R2
1
1
1
1
0
3.32MI Q1% resistor (0402)
866kI Q1% resistor (0402)
100I resistor (0402)
3300pF Q10%, 50V X7R ceramic
capacitor (0402)
Murata GRM155R71H332K
R4
R6
10kI Q1% resistor (0402)
Not installed, test points
TP1, TP2
10FF Q10%, 10V X7R ceramic
capacitor (1206)
Murata GRM31CR71A106K
See the EV Kit-Specific
Component List
U1
—
—
1
1
1
Shunt
33FF, 80V aluminum electrolytic
(D = 8mm)
Panasonic EEEFK1K330P
PCB: See the EV Kit-Specific
Component List
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-6436; Rev 1; 10/13
MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
EV Kit-Specific Component List
EV KIT
DESIGNATION
DESCRIPTION
Buck converter (10 TDFN-EP*)
Maxim MAX17501BATB+
U1
—
MAX17501BTEVKIT#
PCB: MAX17501BT EVALUATION KIT
Buck converter (10 TDFN-EP*)
Maxim MAX17501FATB+
U1
—
MAX17501FTEVKIT#
PCB: MAX17501FT EVALUATION KIT
*EP = Exposed pad.
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Coilcraft, Inc.
847-639-6400
770-436-1300
800-344-2112
www.coilcraft.com
Murata Electronics North America, Inc.
Panasonic Corp.
www.murata-northamerica.com
www.panasonic.com
Note: Indicate that you are using the MAX17501 when contacting these component suppliers.
5) Turn on the DC power supply.
Quick Start
6) Enable the load.
Recommended Equipment
7) Verify that the DVM displays the expected voltage.
•ꢀ MAX17501B or MAX17501F EV kit
To turn-on/off the part from EN/UVLO, follow the steps
below:
•ꢀ 6V to 60V, 1A DC input power supply
•ꢀ Load capable of sinking 500mA
•ꢀ Digital voltmeter (DVM)
1) Remove resistors R1 and R2 and the jumper installed
across pins 1-2 on jumper JU1.
•ꢀ Function generator
2) Connect the power supply to the EV kit and turn on
the power supply. Set the power supply at a voltage
between 6V and 60V.
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify the board operation. Caution: Do not turn
on power supply until all connections are completed.
3) Connect the function generator output to the
EN/UVLO test loop.
4) EN/UVLO rising threshold is 1.24V and falling threshold
is 1.11V. Make sure that the voltage-high and voltage-
low levels of the function generator output are greater
than 1.24V and less than 1.11V, respectively.
1) Set the power supply at a voltage between 6V and 60V.
Disable the power supply.
2) Connect the positive terminal of the power supply to the
VIN PCB pad and the negative terminal to the nearest
PGND PCB pad. Connect the positive terminal of the
500mA load to the VOUT PCB pad and the negative
terminal to the nearest PGND PCB pad.
5) While powering down the EV kits, first disconnect the
function generator output from the EN/UVLO test loop
and then turn off the DC power supply.
Care should be taken in board layout and systems wir-
ing to prevent violation of the absolute maximum rating of
the FB/VO pin under short-circuit conditions. Under such
conditions, it is possible for the ceramic output capacitor to
oscillate with the board or wiring inductance between the
3) Connect the DVM across the VOUT PCB pad and the
nearest PGND PCB pad.
4) Verify that a shunt is installed across pins 1-2 on jumper
JU1.
Maxim Integrated
2
MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
capacitor and short-circuited load, and thereby cause the
Regulator Enable/Undervoltage-
Lockout Level (EN/UVLO)
The devices feature an EN/UVLO input. For normal
operation, a shunt should be installed across pins 1-2 on
jumper JU1. To disable the output, install a shunt across
pins 2-3 on JU1 and the EN/UVLO pin is pulled to GND.
See Table 1 for JU1 settings.
absolute maximum rating of FB/VO (-0.3V) to be exceeded.
This parasitic board or wiring inductance should be mini-
mized and the output voltage waveform under short-cir-
cuit operation should be verified to ensure that the absolute
maximum rating of FB/VO is not exceeded.
Detailed Description of Hardware
Setting the Undervoltage-Lockout Level
The devices offer an adjustable input undervoltage-
lockout level. Set the voltage at which the device turns
on with a resistive voltage-divider connected from VIN
to GND. Connect the center node of the divider to EN/
UVLO.
The MAX17501B/MAX17501F EV kits provide proven
designs to evaluate the MAX17501B/MAX17501F high-
efficiency, high-voltage, synchronous step-down DC-DC
converters. The EV kits generate a fixed 5V, at load cur-
rents up to 500mA, from a 6V to 60V input supply. The
EV kits feature a 600kHz fixed switching frequency for
optimum efficiency and component size. The MAX17501B
EV kit supports a PFM control scheme with high light-load
efficiency, while the MAX17501F EV kit features a forced-
PWM control scheme that provides constant switching-
frequency operation at all load and line conditions.
Choose R1 to be 3.3MI and then calculate R2 as
follows:
R1×1.218
R2 =
(V
−1.218)
INU
The EV kits include an EN/UVLO PCB pad and jumper
JU1 to enable control of the converter output. An
additional RESET PCB pad is available for monitor-
ing the converter output. The VCC PCB pad helps
measure the internal LDO voltage.
where V
turn on.
is the voltage at which the IC is required to
INU
Soft-Start Input (SS)
The devices utilize an adjustable soft-start function to
limit inrush current during startup. The soft-start time is
adjusted by the value of C3, the external capacitor from
SS to GND. To adjust the soft-start time, determine C3
using the following formula:
C3 = 5.55 x t
SS
where t is the required soft-start time in milliseconds
SS
and C3 is in nanofarads.
Table 1. Regulator Enable (EN/UVLO) Jumper JU1 Settings
SHUNT POSITION
EN/UVLO PIN
MAX17501_ OUTPUT
1-2*
Connected to IN
Enabled
Connected to the center node of
resistor-divider R1 and R2
Enabled, UVLO level set through
the R1 and R2 resistor-divider
Not installed
2-3
Connected to GND
Disabled
*Default position.
Maxim Integrated
3
MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
EV Kits Performance Report
LOAD AND LINE REGULATION
(MAX17501B)
EFFICIENCY vs. LOAD CURRENT
(MAX17501B)
5.20
5.15
5.10
5.05
5.00
4.95
4.90
100
90
80
70
60
50
40
30
VIN = 24V
VIN = 12V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 48V
VIN = 36V
VIN = 48V
0
50 100 150 200 250 300 350 400 450 500
LOAD CURRENT (mA)
1
10
100
LOAD CURRENT (mA)
Figure 1. MAX17501B Load and Line Regulation
Figure 3. MAX17501B Efficiency
EFFICIENCY vs. LOAD CURRENT
LOAD AND LINE REGULATION
(MAX17501F)
(MAX17501F)
5.05
100
90
80
70
60
50
40
VIN = 12V
5.04
5.03
5.02
5.01
5.00
4.99
VIN = 36V
VIN = 48V
VIN = 24V
VIN = 36V VIN = 24V
VIN = 12V
VIN = 48V
4.98
4.97
4.96
4.95
0
50 100 150 200 250 300 350 400 450 500
LOAD CURRENT (mA)
50 100 150 200 250 300 350 400 450 500
LOAD CURRENT (mA)
Figure 2. MAX17501F Load and Line Regulation
Figure 4. MAX17501F Efficiency
Maxim Integrated
4
MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
EV Kits Performance Report (continued)
V
(AC)
OUT
100mV/div
f
= 49.8kHz
PM = 62°
CR
I
OUT
100mA/div
4
5
6
7 8 9 1
2
20µs/div
Figure 7. MAX17501F No Load to 250mA Load Transient
Figure 5. MAX17501B/MAX17501F Full-Load Bode Plot
(VIN = 24V)
V
(AC)
OUT
100mV/div
V
(AC)
OUT
100mV/div
I
OUT
200mA/div
I
OUT
100mA/div
200µs/div
20µs/div
Figure 6. MAX17501B 5mA to 255mA Load Transient
Figure 8. MAX17501B/MAX17501F 250mA to 500mA Load
Transient
Maxim Integrated
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MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
VOUT
TP1
L1
VOUT
47µH
PGND
VIN
10
1
2
3
4
5
LX
PGND
C4
10µF
5V/500mA
R4
100
TP2
VIN
PGND
9
8
7
VOUT
R6
VIN
GND
C7
33µF
C1
1µF
U1
10k
1%
MAX17501
EN/UVLO
VCC
RESET
EN/UVLO
VCC
RESET
N.C.
EN/UVLO
GND
C2
1µF
GND
6
FB/VO
SS
C3
3300pF
EP
VIN
R1
3.32M
1%
JU1
2
1
3
EN/UVLO
R2
866k
1%
Figure 9. MAX17501B/MAX17501F EV Kits Schematic
Maxim Integrated
6
MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
1
1
1
1
1
2
2
1
2
2
1
1
1
1
2
1
2
1
1
2
1
2
1
1
2
1
2
1
1
2
1
2
1
2
3
4
5
10
9
1
2
3
4
5
10
9
1
2
1
2
8
8
7
7
6
6
2
2
2
1
2
1
1
1
2
1
2
1
1
2
1
2
1
2
3
1
2
3
1
1
2
2
1
2
1
2
1
2
1
2
1
1
1
1
1.0’’
1.0’’
Figure 10. MAX17501B EV Kit Component Placement Guide—
Component Side
Figure 12. MAX17501B/MAX17501F EV Kits PCB Layout—
Component Side
1
1
1
1
1
2
2
1
2
2
1
1
1
1
2
1
1
2
1
1
2
1
1
2
1
2
3
4
5
10
9
1
2
8
7
6
2
2
1
1
2
1
1
2
1
1
2
1
2
3
1
2
3
1
1
2
2
1
1
2
2
1
2
2
1
1
1
1
1.0’’
1.0’’
Figure 11. MAX17501F EV Kit Component Placement Guide—
Component Side
Figure 13. MAX17501B/MAX17501F EV Kits PCB Layout—
Solder Side
Maxim Integrated
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MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
1.0’’
1.0’’
Figure 14. MAX17501B/MAX17501F EV Kits PCB Layout—Top
Solder Mask
Figure 15. MAX17501B/MAX17501F EV Kits PCB Layout—
Bottom Solder Mask
Maxim Integrated
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MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
Ordering Information
PART
TYPE
EV Kit
EV Kit
MAX17501BTEVKIT#
MAX17501FTEVKIT#
#Denotes RoHS compliant.
Maxim Integrated
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MAX17501B/MAX17501F Evaluation Kits
Evaluate: MAX17501B/MAX17501F
in TDFN Packages
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
DESCRIPTION
0
8/12
Initial release
—
Replaced the R4 resistor value from 0W to 100W in the Component List and
Figure 9 schematic; added new paragraph to the Procedure section about
preventing violation of the abs max rating for FB/VO
1
10/13
1, 2, 6
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
10
©
2013 Maxim Integrated Products, Inc.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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