Altera Enpirion EY1603TI User manual

Enpirion®Power EvaluationBoard
EY1603TI 40Vin 150mA Linear Regulator
Evaluation Board User Guide
Description
This is the EY1603TI User Guide. The
EY1603TI features a wide VIN range of 6V to
40V, voltage reference accurate to ±1%, and
Thermal Shutdown and current Limit
Protection. The evaluation board is optimized
for engineering ease of testing through
programming options, clip leads, test points,
etc.
Evaluation Board Over View
Figure 1. EY1603TI Evaluation Board Illustration
Instructions
The numbers in the instructions belowcorrespond
to the numbers in Figure 1. By following the number
sequence below, the device can be turned on by
step 5.
1) ENABLE – The jumper on the left two pins
of JP9 enables the device through the
resistor R10. The jumper on the right two
pins of JP9 disables the device.
2) Output Voltage Settings (JP1-JP8) - The
jumper may be switched to change the
output voltage. From left to right R1 to R8
(1.5V-15V). The EY1603TI-ADJ output
voltage is programmed using an external
resistor divider.
 = 1.223 9
1+ 1
3) VIN (TP1)- Connect 6V to 40V supply on
TP1. Do not turn on until everything is
connected correctly.
4) Ground (TP2 and TP4)- Connect the input
ground to TP2 and the output ground to
TP4.
5) VOUT (TP3)- Connect the load to TP3. If
the instructions were followed up to this
point, the device may be powered to turn
on.
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EY1603TI Evaluation Board User Guide
Evaluation Board Schematic
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EY1603TI Evaluation Board User Guide
Bill of Materials
Designator
Qty
Description
C1, C2, C4, C5
4
CAP,SMD,1206,10uF,50V,10%,X5R,ROHS
C3
1
CAP,SMD,0603,47pF,50V,5%,C0G,NP0,ROHS
JP1, JP2, JP3,
JP4, JP5, JP6,
JP7, JP8
8
CONN-HEADER,1X2,RETENTIVE,2.54mm,0.230X
0.120,ROHS
JP9
1
CONN-HEADER,1x3,BREAKAWY 1X36,2.54mm,ROHS
R1
1
RES,SMD,0603,DNP-PLACE HOLDER,ROHS
R2
1
RES,SMD, 0603, 60.4K, 1/10W,1%,TF,ROHS
R3
1
RES,SMD,0603,30.1K,1/10W,1%,TF,ROHS
R4
1
RES,SMD,0603, 14K,1/10W,1%,TF,ROHS
R5
1
RES,SMD,0603, 8.66K,1/10W,1%,TF,ROHS
R6
1
RES,SMD,0603,4.75K,1/10W,1%,TF,ROHS
R7
1
RES,SMD,0603, 1.65K, 1/10W, 1%, TF,ROHS
R8
1
RES,SMD,0603, 1.3K, 1/10W,1%,TF,ROHS
R9
1
RES,SMD,0603,15K,1/10W,1%,TF,ROHS
R10
1
RES, SMD, 0603, 10K, 1/10W, 1%, TF,ROHS
TP1, TP2, TP3,
TP4
4
CONN-TURRET,TERMINAL POST,TH,ROHS
U1
1
IC-40V LDO ADJ. LINEAR REGULATOR,14P,HTSSOP
,ROHS
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EY1603TI Evaluation Board User Guide
Test Recommendations
To guarantee measurement accuracy, the following precautions should be observed:
1. Make all input and output voltage measurements at the board using the test points provided
(TP1 to TP4). This will eliminate voltage drop across the line and load cables that can
produce false readings.
2. Measure input and output current with series ammeters or accurate shunt resistors. This is
especially important when measuring efficiency.
3. Use a low-loop-inductance scope probe tip similar to the one shown below to measure
input / output ripple to avoid noise coupling into the probe ground lead. Input ripple, output
ripple, and load transient deviation are best measured near the respective input / output
capacitors. For more accurate ripple measurement, please see Enpirion App Note
regarding this subject.
4. In “always-on” applications, EN should be tied to VIN through R10.
Contact Information
Altera Corporation
101 Innovation Drive
San Jose, CA 95134
Phone: [phone]
www.altera.com
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