MAX40203 Evaluation Kit
Evaluates: MAX40203
General Description
The MAX40203 evaluation kit (EV kit) provides a proven
design to evaluate the MAX40203 “ideal-diode”. This EV
kit demonstrates the MAX40203 in a space-saving 5-pin
SOT23 (MAX40203AUK+). This EV kit can be used to
evaluate the MAX40203AUK+ as well.
The MAX40203 EV kit PCB comes with two
MAX40203AUK+ devices installed. The MAX40203
device is a current-switch, which drops so little voltage as
to approximate an “ideal diode”.
The MAX40203 is also available in a tiny 0.8mm x 0.8mm
4-bump WLP with a 0.35mm bump pitch and has lower
voltage drop. These devices operate over the automotive
-40°C to +125° C temperature range.
Features
●
Drops Only 100mV at 500mA
●
Less than 10nA Leakage When Reverse-Biased
From VDD
●
Supply Voltage Range: Between 1.2V and 5.5V
●
Low Supply Quiescent Current: 300nA (typ),
500nA (max)
●
Thermally Self-Protecting
●
-40°C to +125°C Temperature Range
●
Evaluates MAX40203AUK+
●
Accommodates Easy-to-Use Components
●
Proven PCB Layout
●
Fully Assembled and Tested
Ordering Information
appears at end of data sheet.
MAX40203 EV Kit Photo
319-100217; Rev 0; 7/18
MAX40203 Evaluation Kit
Evaluates: MAX40203
Quick Start
Required Equipment
•
•
•
•
MAX40203 EV kit
+6V DC power supply
Electronic load capable of sinking 1A ( e.g., HP6060B)
Precision voltmeter
3. Connect the voltmeter across the V
DD
and OUT pads.
4. Verify all the shunts are in default positions, as shown
in
Table 1.
5. Do not install J3.
6. Turn on the power supply.
7. Turn on the electronic load and verify that the current
flowing is equal to the set value of 500mA.
8. Verify that the forward voltage or (V
DD
– V
OUT
)
voltmeter reading is approximately 100mV.
9. Turn off the electronic load.
10.Set the electronic load to sink 100mA.
11. Turn on the electronic load.
12.Verify that the forward voltage or (V
DD
– V
OUT
)
voltmeter reading is approximately 28mV.
Procedure
The EV kit is fully assembled and tested. Follow the below
instructions to verify board operation.
Caution: Do not
turn on the power supply or the electronic load until
all the connections are complete.
1. Set the DC power supply to 3.6V output. Connect the
positive terminal of the 3.6V supply to the V
DD
pad.
Connect the negative terminal of the 3.6V supply to the
GND pad.
2. Connect the electronic load’s positive terminal to the
OUT pad and the negative terminal to the GND pad
and set to 500mA sink.
Table 1. Jumper Functions (J1 – J3)
JUMPER LABEL
J1
J2
2-3
1-2*
2-3
Not Installed*
J3**
Installed
Not Installed*
Installed
SHUNT POSITION
1-2*
Enables U1
Disables U1
Enables U2
Disables U2
Devices U1 and U2 Enable operates independently
Connects Enable (EN) input of U1 and U2 together. User-supplied
enable input signal
Devices operate independently
Connect OUT(U1) and OUT(U2) together for ORing application
DESCRIPTION
J4
*Default position.
**When installing J3, remove J1 and J2 from the EV kit.
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MAX40203 Evaluation Kit
Evaluates: MAX40203
Detailed Description of Hardware
Theory of Operation
The MAX40203 EV kit provides a proven design to evaluate
the MAX40203 5-pin SOT23, space-saving, “ideal-diode.”
The device blocks reverse voltages and passes current
when forward-biased, just as a normal diode would. The
device, when forward-biased and enabled, conducts with
as little as 100mV of voltage drop while carrying currents
as high as 500mA. At higher currents (up to 1A), the
voltage drop increases linearly. The MAX40203 protects
itself, and any down-stream circuitry, from overtemperature
conditions.
When disabled (EN = low), the MAX40203 can block
voltages up to 6V in either direction, making it suitable
for most low-voltage portable electronic devices. The low
(300nA, typ.) supply current is independent of the load
current. The MAX40203 operates from supplies within the
range of 1.2V and 5.5V.
The two “ideal-diode” devices may be used independently
or together. The PCB circuit mimics a typical wall adaptor/
battery-charging circuit having different V
DD1
and V
DD2
.
They are connected to the common output, where the
load is connected.
When used independently or together, enable inputs EN1
and EN2 turn the device on or off. The device that is
turned on conducts current to the load. The device that
is turned off does not conduct current to the load from its
V
DD
input.
Ordering Information
PART
MAX40203EVKIT#
#Denotes
RoHS compliant.
TYPE
EV Kit
MAX40203 EV Kit Bill of Materials
ITEM
1
2
3
4
5
6
REF_DES
C1, C2, C6
C3, C4
C5
EN1, EN2, OUT, OUT1, OUT2,
TP5, TP6, VDD1, VDD2
GND, TP1-TP4, TP9, TP10
J1, J2
DNI/
DNP
-
-
-
-
-
-
QTY MFG PART #
3
2
1
9
7
2
PBC03SAAN
C1206C105K3RAC;ECJ-
3YB1E105K
C1608X7R1E104K080AA
C2012X7T2E104K125
MFG
VALUE
DESCRIPTION
CAPACITOR; SMT (1206); CERAMIC CHIP; 1UF; 25V; TOL=10%; MODEL=X7R; TG=-
55 DEGC TO +125 DEGC; TC=+/-
CAPACITOR; SMT (0603); CERAMIC CHIP; 0.1UF; 25V; TOL=10%; MODEL=C
SERIES; TG=-55 DEGC TO +125 DEGC; TC=X7R
CAPACITOR; SMT (0805); CERAMIC CHIP; 0.1UF; 250V; TOL=10%; MODEL=C
SERIES; TG=-55 DEGC TO +125 DEGC; TC=X7T
TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.35IN; BOARD HOLE=0.063IN;
RED; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.35IN; BOARD HOLE=0.063IN;
BLACK; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 3PINS; -65 DEGC
TO +125 DEGC
KEMET;PANA
SONIC
1UF
TDK
TDK
5005 KEYSTONE
5006 KEYSTONE
SULLINS
0.1UF
0.1UF
N/A
N/A
PBC03SAAN
7
J3, J4
-
2
PBC02SAAN
SULLINS
ELECTRONIC
S CORP.
PBC02SAAN
CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 2PINS
8
9
TOTAL
U1, U2
PCB
-
-
2
1
29
MAX40203AUK+
MAX40203
MAXIM
MAXIM
EVKIT PART - IC; ULTRA-TINY NANOPOWER; 1A IDEAL DIODE WITH ULTRA-LOW
MAX40203AUK VOLTAGE DROP; PACKAGE OUTLINE DRAWING NUMBER: 21-0057; PACKAGE
LAND PATTERN: 90-0174; PACKAGE CODE: U5+2; SOT23-5
+
PCB
PCB:MAX40203
NOTE:
DNI--> DO NOT INSTALL(PACKOUT) ; DNP--> DO NOT PROCURE
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GND
VDD1
U1
MAX40203AUK+
C1
0.1UF
1
1
J4
U2
MAX40203AUK+
C2
2
3
EN
GND
NC
1
1UF
0.1UF
VDD2
C4
1
VDD
OUT
5
4
GND
2
J2
EN2
3
GND
VDD2
OUT2
Evaluates: MAX40203
GND
2
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OUT1
GND
1
2
3
J1
3
EN
NC
4
1UF
VDD1
C3
2
GND
1
VDD
OUT
5
GND
MAX40203 Evaluation Kit
MAX40203 EV Kit Schematic
EN1
OUT
C5
J3
0.1UF
C6
1UF
GND
2
Maxim Integrated
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MAX40203 Evaluation Kit
Evaluates: MAX40203
MAX40203 EV Kit PCB Layout Diagrams
MAX40203 EV Kit—Top Silkscreen
MAX40203 EV Kit—Top
MAX40203 EV Kit—Bottom
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