isl8013xeval1z user guide

Application Note 1784
ISL80136EVAL1Z, ISL80138EVAL1Z Evaluation Boards
User Guide
Description
Features
The ISL80136EVAL1Z and ISL80138EVAL1Z evaluation boards
are designed to demo the performance of these high voltage
linear regulators. The evaluation boards are available with
jumpers to set output voltage from 2.5V to 12V for easy
evaluation by configuring a single resistor. The evaluation
boards can also be configured to give a specific output voltage.
• Wide VIN range of 6V to 40V
• Adjustable output voltage from 2.5V to 12V
• IOUT is 50mA for ISL80136 and 150mA for ISL80138
• Ultra low 18μA typical quiescent current
• ±1% accurate voltage reference
• Overcurrent protection
Specification
These boards have been configured and optimized for the
following operating conditions:
• VIN = 6V to 40V
• Over-temperature/thermal protection
References
ISL80136 Datasheet
• VOUT = 2.5V to 12V
ISL80138 Datasheet
• IOUT maximum is 50mA for ISL80136 and 150mA for
ISL80138.
• Selectable output by setting jumper pins JP2 through JP8.
• JP1 uses for setting custom output voltage.
Ordering Information
PART NUMBER
DESCRITION
ISL80136EVAL1Z
40V Linear Regulator, 50mA Evaluation Board
ISL80138EVAL1Z
40V Linear Regulator, 150mA Evaluation
Board
FIGURE 1. ISL80138EVAL1Z EVALUATION BOARD
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Application Note 1784
Test Steps
1. Place jumper in proper location to set output voltage.
OUT
IN
2. Set jumper JP9 shorting pins 1 and 2 to enable device.
CIN
3. Connect supply +6V to +40V to VIN and GND terminals.
EN
ADJ
4. Connect VOUT to load or multimeter to evaluate output.
GND
The ISL80136EVAL1Z and ISL80138EVAL1Z provide a simple
platform to evaluate performance of ISL80136 and ISL80138.
The ISL80136 and ISL80138 are high input voltage, low
quiescent current linear regulators. The ISL80136 can output up
to 50mA while the ISL80138 can provide 150mA current with
only 18µA typical quiescent current. Both regulators feature a
wide input voltage range of 6V to 40V. The output voltage is
adjustable from 2.5V to 12V through a feedback resistor divider.
The ISL80136 and ISL80138 are ideal for applications that need
the load to operate under “always-on” or “stay alive” conditions of
a high input voltage or under load dump conditions where the
system voltage may peak much higher than normal. In addition,
the low dropout performance and high PSRR make these
regulators a good choice as a post regulator for a noisy voltage
bus.
The ISL80136EVAL1Z and ISL80138EVAL1Z evaluation boards
are setup so that the user can easily configure the device for a
specific output voltage with a single jumper. Jumper pins JP4
through JP7 will set the output voltage through a discrete range
of 2.5V to 12V. When jumper JP1 is set, the user must populate
R1 with a resistor to get a custom output voltage.
The regulator uses a voltage divider to set the feedback
reference for setting output voltage. The voltage at the output of
the linear regulator when setting a custom output voltage is
defined by Equation 1. R9 is set on the evaluation board at 15kΩ.
Rearranging for R1 yields Equation 2.
FIGURE 2. OUTPUT VOLTAGE SETTING
EVALUATION BOARD OUTPUT VOLTAGE
VOUT (V)
RSET
JUMPER SETTING
2.5
14kΩ
JP4
3.3
8.66kΩ
JP5
5
4.75kΩ
JP6
12
1.65kΩ
JP7
CUSTOM
R1 = 18.3kΩ/(VOUT - 1.223)
JP1
PCB Layout Guidelines
A good PCB layout is important to achieve expected
performance. Consideration should be taken when placing the
components and routing the trace to minimize the ground
impedance, and keep the parasitic inductance low. The input and
output capacitors should have a good ground connection and be
placed as close to the IC as possible. The ADJ feedback trace
should be away from other noisy traces. Connect the exposed
pad to the ground plane using as many vias as possible within
the pad for the best thermal relief.
(EQ. 1)
18.3k
R 1 = ------------------------------------V OUT – 1.223
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COUT
R1
Functional Description
R

V OUT = 1.223V   ------9- + 1
R
 1

R9
15k

(EQ. 2)
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Application Note 1784
ISL80136EVAL1Z Schematic
VIN
TP1
4
JP9
GND
9
ADJ
NC
NC
EN
GND
TP3
7
6
5
10UF
NC
8
C5
3
TP2
OUT
DNP
2
VOUT
IN
C4
10K
R10
DNP
C2
10UF
C1
U1
1
TP4
EP
GND
47PF
C3
R9
15K
ISL80136FBECZ
15V
R8
1.3K
JP8
1.65K
JP7
12V
R7
JP6
5V
R6
4.75K
JP5
R5
8.66K
3.3V
14K
JP4
R4
2.5V
1.8V
R3
30.1K
JP3
JP2
R2
60.4K
1.5V
R1
DNP
JP1
VADJ
FIGURE 3. ISL80136EVAL1Z SCHEMATIC
ISL80138EVAL1Z Schematic
VIN
U1
TP2
GND
JP9
VOUT
14
2
IN
NC
13
3
NC
ADJ
4
NC
NC
11
5
NC
NC
10
6
NC
NC
9
7
EN
GND
8
15
EP
TP3
12
10UF
OUT
C5
NC
DNP
1
C4
10K
R10
DNP
C2
C1
10UF
TP1
TP4
GND
C3
R8
47PF
15K
1.65K
R9
ISL80138IVEAJZ
1.3K
JP8
15V
R7
JP7
12V
4.75K
R6
JP6
5V
JP5
R5
8.66K
3.3V
2.5V
14K
JP4
R4
30.1K
R3
JP3
1.8V
JP2
R2
60.4K
1.5V
DNP
R1
JP1
VADJ
FIGURE 4. ISL80138EVAL1Z SCHEMATIC
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Bill of Materials
PART
NUMBER
REFERENCE
DESIGNATOR
DESCRIPTION
MANUFACTURER
MANUFACTURER
PART
4
UNITS
H1045-00470-50V5-T
1
ea.
C3
CAP, SMD, 0603, 47pF, 50V, 5%, C0G, NP0, ROHS
AVX
06035A470JAT2A
H1065-00106-50V10-T
4
ea.
C1, C2, C4, C5
CAP, SMD, 1206, 10µF, 50V, 10%, X5R, ROHS
TDK
C3216X5R1H106K
1514-2
4
ea.
TP1, TP2, TP3, TP4
CONN-TURRET, TERMINAL POST, TH, ROHS
KEYSTONE
1514-2
68000-236HLF-1X3
1
ea.
JP9
CONN-HEADER, 1x3, BREAKAWY 1X36, 2.54mm, ROHS
BERG/FCI
68000-236HLF
69190-202HLF
8
ea.
JP1, JP2, JP3, JP4, JP5,
JP6, JP7, JP8
CONN-HEADER, 1X2, RETENTIVE, 2.54mm, 0.230X 0.120, ROHS BERG/FCI
69190-202HLF
SPC02SYAN
2
ea.
JP6, JP9-Pins 1 and 2
CONN-JUMPER, SHORTING, 2PIN, BLACK, GOLD, ROHS
SULLINS
SPC02SYAN
ISL80136IBEAJZ
1
ea.
U1
IC-40V LDO ADJ. LINEAR REGULATOR, 8P, EPSOIC, ROHS
INTERSIL
ISL80136IBEAJZ
ISL80138IVEAJZ
1
ea.
U1
IC-40V LDO ADJ. LINEAR REGULATOR, 14P, HTSSOP, ROHS
INTERSIL
ISL80138IVEAJZ
H2511-01002-1/10W1-T
1
ea.
R10
RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS
KOA
RK73H1JT1002F
H2511-01301-1/10W1-T
1
ea.
R8
RES, SMD, 0603, 1.3k, 1/10W, 1%, TF, ROHS
VISHAY/DALE
CRCW06031K30FKTA
H2511-01402-1/10W1-T
1
ea.
R4
RES, SMD, 0603, 14k, 1/10W, 1%, TF, ROHS
VENKEL
CR0603-10W-1402FT
H2511-01502-1/10W1-T
1
ea.
R9
RES, SMD, 0603, 15k, 1/10W, 1%, TF, ROHS
PANASONIC
ERJ-3EKF1502V
H2511-01651-1/10W1-T
1
ea.
R7
RES, SMD, 0603, 1.65k, 1/10W, 1%, TF, ROHS
PANASONIC
ERJ-3EKF1651V
H2511-03012-1/10W1-T
1
ea.
R3
RES, SMD, 0603, 30.1k, 1/10W, 1%, TF, ROHS
VENKEL
CR0603-10W-3012FT
H2511-04751-1/10W1-T
1
ea.
R6
RES, SMD, 0603, 4.75k, 1/10W, 1%, TF, ROHS
VENKEL
CR0603-10W-4751FT
H2511-06042-1/10W1-T
1
ea.
R2
RES, SMD, 0603, 60.4k, 1/10W, 1%, TF, ROHS
YAGEO
RC0603FR-0760K4L
H2511-08661-1/10W1-T
1
ea.
R5
RES, SMD, 0603, 8.66k, 1/10W, 1%, TF, ROHS
PANASONIC
ERJ-3EKF8661V
H2511-DNP
0
ea.
R1
RES, SMD, 0603, DNP-PLACE HOLDER, ROHS
Application Note 1784
QTY
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Application Note 1784
Board Layouts
FIGURE 5. ISL80136EVAL1Z SILKSCREEN TOP
FIGURE 6. ISL80138EVAL1Z SILKSCREEN TOP
FIGURE 7. ISL80136EVAL1Z TOP
FIGURE 8. ISL80136EVAL1Z BOTTOM
FIGURE 9. ISL80138EVAL1Z TOP
FIGURE 10. ISL80138EVAL1Z BOTTOM
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Application Note 1784
5.100
90
5.075
80
+125°C
+25°C
5.000
-40°C
4.975
IOUT = 0A
60
5.025
IOUT = 25mA
50
40
30
4.950
IOUT = 50mA
20
4.925
4.900
VOUT = 5V
70
5.050
PSRR (dB)
OUTPUT VOLTAGE (V)
Typical Performance Curves
10
0
10
20
30
40
0
50
100
1k
1M
FIGURE 12. ISL80136 PSRR vs FREQUENCY FOR VARIOUS LOAD
CURRENT, VOUT = 5V
FIGURE 11. ISL80136 OUTPUT VOLTAGE VS LOAD CURRENT
5.20
70
5.15
60
5.10
VOUT = 3.3V
50
+125°C
5.05
+25°C
PSRR (dB)
OUTPUT VOLTAGE (V)
100k
FREQUENCY (Hz)
LOAD CURRENT (mA)
5.00
4.95
-40°C
40
VOUT = 5V
30
20
4.90
10
4.85
4.80
10k
0
50
100
LOAD CURRENT (mA)
FIGURE 13. ISL80138 OUTPUT VOLTAGE vs LOAD CURRENT
150
0
100
1k
10k
FREQUENCY (Hz)
100k
1M
FIGURE 14. ISL80138 PSRR VS FREQUENCY FOR VARIOUS OUTPUT
VOLTAGES, (LOAD = 150MA)
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is
cautioned to verify that the document is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
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