Intersil ISL73007SEHEV2Z User manual

Evaluation Board Manual
R34UZ0007EU0100 Rev.1.00 Page 1
Mar 23, 2022 © 2022 Renesas Electronics
The ISL73007SEHEV2Z evaluation board (shown in
Figure 3) features the ISL73007SEH buck regulator.
The IC is a small foot print radiation hardened POL
designed for critical low power applications.
The ISL73007SEH is operational over 3V to 18V
integrating both high-side and low-side power FETs
and switches at a default 500kHz frequency. The
switching frequency can also be programmed from
300kHz up to 1MHz using an external resistor. The
ISL73007SEH uses constant-frequency peak current
mode control architecture for fast loop transient
response. The ISL73007SEH can use either its
internal compensation at the 500kHz default
switching frequency or an external Type II
compensation at other frequencies to stabilize the
loop as determined by specific design and
performance requirements. When integrating both
P-channel and N-channel power devices with the
option of internal compensation, a minimum of
external components are required, thereby reducing
the BOM count and complexity of the design.
The ISL73007SEHEV2Z evaluation board and this
accompanying manual provide a quick and easy
method to evaluate the ISL73007SEH part, see the
ISL73007SEH datasheet for information about the
operation, function, and performance of the device.
Features
▪Optimized for 3.3V to 1.2V conversion, externally
set 1MHz switching frequency, external slope and
compensation configuration
▪3A output current
Specifications
The ISL73007SEHEV2Z evaluation board is by
default externally configured for immediate evaluation
with minimum components and connections, which
allows for other conditions to be evaluated with
user-modification of components and connections.
The electrical ratings of the ISL73007SEHEV2Z
evaluation board are shown in Table 1.
Table 1. Electrical Ratings
Parameter Rating
PVIN Supply Voltage 2.9V - 12V
DC Output Voltage 1.2V
Operating Frequency 1MHz
Output Current 3A
Temperature -55oC to +125oC
Figure 1. Block Diagram
ISL73007SEH VOUT
VIN
ISL73007SEHEV2Z

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ISL73007SEHEV2Z Evaluation Board Manual
Contents
1. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Operational Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Setup and Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Board Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Basic Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Layout Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5 Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Typical Performance Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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ISL73007SEHEV2Z Evaluation Board Manual
1. Functional Description
The ISL73007SEHEV2Z evaluation board has a default configuration of 3.3V to 1.2V conversion with a 3A
maximum output current and contains the ISL73007SEH voltage regulator IC in the external configuration for the
1MHz switching frequency, and for control loop and slope compensations. Figure 1 shows the
ISL73007SEHEV2Z evaluation board block diagram. Photographs of the ISL73007SEHEV2Z are shown in
Figure 3 and Figure 4.
The ISL73007SEHEV2Z evaluation board provides access to the pins of the IC device and convenient pads for
connecting test equipment. For more information, see the schematic (Figure 5), PCB layers (Figure 6 through
Figure 11), and Bill of Materials. Performance data taken using the ISL73007SEHEV2Z and basic lab equipment
is shown in Figure 12 through Figure 19.
1.1 Operational Characteristics
The ISL73007SEHEV2Z only requires a single voltage supply > 2.9V connected to the PVIN pad to operate,
outputting 1.2V on the VOUT pad with a 3A output current capability. Optimized for a nominal PVIN voltage of
3.3V, the input operating voltage at which the IC turns on is set by the resistor divider (R1and R2) on the ENABLE
pin. Important: Do not exceed 5V on the ENABLE pin.
1.2 Setup and Configuration
The following equipment is recommended for testing the board:
▪5V power supply
▪100MHz oscilloscope
Complete the following steps to configure and use the board:
1. Configure the board as shown in Figure 2.
2. Connect and turn on a 3.3V power supply to the PVIN pad.
3. Using the oscilloscope to look at VIN and VOUT waveforms and to also observe the behavior of the LX phase
node located on pins 13 and 14 of the IC package. Proper probe grounding must be practiced when observing
clean waveforms.
4. Output current loading can be externally added at the VOUT and GND pads for loaded output evaluations. A
DVM(s) can be employed to monitor the input and output voltages and currents.
Figure 2. ISL73007SEH Basic Evaluation Test Setup Block Diagram
PVIN VOUT
ISL73007SEHEV2Z
Oscilloscope
GND
+3.3V
DC Power Supply
-+
GND
LX

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ISL73007SEHEV2Z Evaluation Board Manual
2. Board Design
Figure 3. ISL73007SEHEV2Z Evaluation Board (Top)
Figure 4. ISL73007SEHEV2Z Evaluation Board (Bottom)

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ISL73007SEHEV2Z Evaluation Board Manual
2.1 Basic Layout
The ISL73007SEH is located in the center of the board and is labeled U1. Connect the input power across the
PVIN and GND pads. The output voltage then appears across the V_OUT and GND pads near the output inductor
(L1) and the output capacitance (C8), respectively. Additional CIN is provided by C2(flip side) and C3. The other
passive components near the PVIN pad are for setting the EN POR, slope compensation, and VCC decoupling.
The passive components between the GND and V_OUT pads on the edge of the PCB are for switching frequency
and output voltage setting, compensating the external loop error amplifier and PGOOD pull-up. Consult the
schematic in (Figure 5) for more details.
2.2 Layout Guidelines
PCB design is critical to reduce parasitic inductances with critical components being closely placed to the IC. The
critical components in order would be the loop compensation RC, the slope resistor, and the low ESR ceramic
input capacitors. Avoid placing any traces or components under the LX shapes to avoid noise coupling from the
switching node.
2.3 Schematic Diagrams
Figure 5. Schematic

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ISL73007SEHEV2Z Evaluation Board Manual
2.4 Bill of Materials
Qty Reference
Designator Description Manufacturer Manufacturer Part
1U1
IC-RAD HARD 3A POL
REGULATOR, 14P, CFP, ROHS Renesas Electronics ISL73007SEHF/PROTO
1PWB-PCB, ISL73007SEHEV2Z,
REVA, ROHS Imagineering Inc ISL73007SEHEV2ZREVAPCB
3C2,C4,C9
CAPACITOR, SMD, 2220, 22µF,
25V, 20%, X7R, ROHS TDK C5750X7R1E226M
2C3,C7
CAP-AEC-Q200, SMD, 0603, 1µF,
25V, 10%, X7R, ROHS Murata GCM188R71E105KA64D
1C5
CAP, SMD, 0603, 1200pF, 50V,
1%, C0G/NP0, ROHS Murata GRM1885C1H122FA01D
1C6
CAP, SMD, 0603, 0.1µF, 25V,
10%, X7R, ROHS Yageo CC0603KRX7R8BB104
1C10
CAP, SMD, 0603, 1nF, 25V, 10%,
X7R, ROHS Yageo CC0603KRX7R8BB102
1C8
CAP-TANT, SMD, 1411, 100µF,
6V, 20%, 15mΩat 100MHz, ROHS Kemet T520B107M006ATE015
1L1
COIL-PWR INDUCT, SMD,
4x4mm, 0.82µH.20%, 9.4A,
8.6mΩ, ROHS
Coilcraft XGL4020-821MEC
1R3
RES, SMD, 0603, 43k, 1/10W,
0.1%, TF, ROHS Panasonic ERA-3AEB433V
3R6,R7,R8
RES, SMD, 0603, 10k, 1/10W, 1%,
TF, ROHS Venkel CR0603-10W-1002FT
1R4
RES, SMD, 0603, 42.7k, 1/10W,
1%, TF, ROHS Venkel CR0603-10W-4272FT
1R5
RES, SMD, 0603, 14k, 1/10W, 1%,
TF, ROHS Venkel CR0603-10W-1402FT
1R2
RES, SMD, 0603, 52.3k, 1/10W,
1%, TF, ROHS Yageo RC0603FR-052321L
1R1
RES, SMD, 0603, 75k, 1/10W, 1%,
TF, ROHS Venkel CR0603-10W-7502FT

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ISL73007SEHEV2Z Evaluation Board Manual
2.5 Board Layout
Figure 6. Top Layer Figure 7. Layer 2
Figure 8. Layer 3 Figure 9. Bottom Layer
Figure 10. Top Silk Layer Figure 11. Bottom Silk Layer

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ISL73007SEHEV2Z Evaluation Board Manual
3. Typical Performance Graphs
Unless otherwise noted, PVIN = 3.3V; VOUT = 1.2V, fSW = 1MHz, TA= Room Ambient. Some results with modified board.
Figure 12. Efficiency Figure 13. Load Regulation
Figure 14. Turn-on, 0.6Ωload Figure 15. Over Current into Restart through Hiccup
Figure 16. +2A Output Current Transient Figure 17. -2A Output Current Transient
60
65
70
75
80
85
90
95
100
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8
3.0
Efficiency (%)
Output Current (A)
-0.50
-0.40
-0.30
-0.20
-0.10
0.00
0.10
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8
3.0
Load Regulation (%)
Output Current (A)
VOUT IOUT
PVIN
LXV
IOUT
VOUT
IOUT
VOUT
IOUT
VOUT

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ISL73007SEHEV2Z Evaluation Board Manual
4. Ordering Information
5. Revision History
Figure 18. Gain/Phase BODE Plot, IOUT = 2A Figure 19. Package Temperature at IOUT = 3A
Part Number Description
ISL73007SEHEV2Z Radiation Hardened ISL73007SEH buck regulator evaluation board
Revision Date Description
1.00 Mar 23, 2022 Initial release
Unless otherwise noted, PVIN = 3.3V; VOUT = 1.2V, fSW = 1MHz, TA= Room Ambient. Some results with modified board. (Cont.)
-200
-150
-100
-50
0
50
100
150
200
-80
-60
-40
-20
0
20
40
60
80
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
Phase Margin (°)
Gain (dB)
Frequency (Hz)
Gain (dB)
Phase (Deg)

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