Renesas Intersil ISL73007SEH Manual de usuario

Evaluation Board Manual

R34UZ0006EU0100 Rev.1.00 Page 1

The ISL73007SEHEV3Z evaluation board (shown in

Figure 3) features the ISL73007SEH buck regulator.

This 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 and 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 and with the option of internal

compensation, a minimum of external components

are required, thereby reducing the BOM count and

complexity of the design.

The ISL73007SEHEV3Z 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

device operation, function, and performance.

Features

▪Optimized for 12V to 5V conversion and set up for

a minimum 8V input with internal 500kHz switching

frequency, slope and compensation configuration

▪3A output current

Specifications

The ISL73007SEHEV3Z evaluation board is by

default internally configured for immediate evaluation

with a minimum of components and connections.

The electrical ratings of the ISL73007SEHEV3Z

evaluation board are shown in Table 1.

Table 1. Electrical Ratings

Parameter Rating

PVIN Supply Voltage 8V - 18V

DC Output Voltage 5V

Operating Frequency 500kHz

Output Current 3A

Temperature -55oC to +125oC

Figure 1. Block Diagram

ISL73007SEH VOUT

VIN

ISL73007SEHEV3Z

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ISL73007SEHEV3Z 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 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.5 Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3. Typical Performance Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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ISL73007SEHEV3Z Evaluation Board Manual

1. Functional Description

The ISL73007SEHEV3Z evaluation board has a default configuration of 8V -18V input to 5V output conversion

with a 3A maximum output current and contains the ISL73007SEH voltage regulator IC in the internal

configuration for the switching frequency, and for control loop and slope compensations. Figure 1 shows the

ISL73007SEHEV3Z evaluation board block diagram. A photograph of the ISL73007SEHEV3Z is shown in

Figure 3 and Figure 4.

The ISL73007SEHEV3Z evaluation board provides access to the pins of the IC device and convenient input and

output points for connecting test equipment. For more information, see the Schematic Diagram, top layer

silkscreen (Figure 11), and Bill of Materials. Performance data taken using the ISL73007SEHEV3Z and basic lab

equipment is shown in Figure 12 through Figure 19.

1.1 Operational Characteristics

The ISL73007SEHEV3Z only requires a single voltage supply > 7.8V connected to the PVIN pad to operate,

outputting 5V on the VOUT pad with a 3A output current capability. Configured for a nominal PVIN voltage of 12V,

the input operating voltage at which the IC turns on is set by the resistor divider (R1 and 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:

▪Voltage 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 an 8V to 16V 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

ISL73007SEHEV3Z

Oscilloscope

GND

+12V

DC Power Supply

GND

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ISL73007SEHEV3Z Evaluation Board Manual

2. Board Design

Figure 3. ISL73007SEHEV3Z Evaluation Board (Top)

Figure 4. ISL73007SEHEV3Z Evaluation Board (Bottom)

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ISL73007SEHEV3Z Evaluation Board Manual

2.1 Basic Layout

The ISL73007SEH is located in the upper center of the board and is labeled U1.

Connect the input power across the yellow Tantalum capacitor, the bulk input capacitance (CIN) at the PVIN and

GND pads. The output voltage then appears on the V_OUT and GND pads near the output inductor (LOUT) and

the output capacitance (COUT), respectively. Additional CIN is provided by C2 (flip side) and C4. 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 are for output voltage setting and PGOOD pull-up.

Consult the schematic (Figure 5) for 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 being the low ESR ceramic input capacitors for first placement. Avoid placing any traces or

components under the LX shapes to avoid noise coupling from the switching node.

2.3 Schematic Diagram

Figure 5. ISL73007SEHEV3Z Schematic

100UF

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ISL73007SEHEV3Z Evaluation Board Manual

2.4 Bill of Materials

2.5 Board Layout

Qty Reference

Designator Description Manufacturer Manufacturer Part

1U1 ISL73007SEH - 18V, 3A Rad Hard

Buck Regulator

Renesas ISL73007SEH/PROTO

5C2, C4, C8-C10 22µF, 2220 MLCC TDK C5750X7R1E226M

2C3, C7 1µF, 0603 MLCC Various GCM188R71E105KA64D

1C6 0.1µF, 0603 MLCC Various Generic

2R6, R7 10k, 0603 Metal Film Chip Resistor Various Generic

1R2 14.3k, 0603 Metal Film Chip Resistor Various Generic

1R8 1.371k, 0603 Metal Film Chip

Resistor

Various Generic

1R1 75k, 0603 Metal Film Chip Resistor Various Generic

1C1 100µF, ESR 10mΩPOLYMER

CAPACITOR

KEMET T541X107M020AH6510

1L1 5.6µH, IND_XEL5050, Shielded

Power Inductor

CoilCraft XEL5050-562ME

Figure 6. Top Layer Figure 7. Layer 2

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ISL73007SEHEV3Z Evaluation Board Manual

3. Typical Performance Graphs

Figure 8. Layer 3 Figure 9. Bottom Layer

Figure 10. Top Assembly Layer Figure 11. Top Silk Layer

Unless otherwise noted, PVIN = 12V; VOUT = 5V, fSW = 500kHz, TA= Room Ambient

Figure 12. Efficiency Figure 13. Load Regulation

100

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Efficiency (%)

Output Current (A)

8V 12V 16V

-0.02

0.00

0.02

0.04

0.06

0.08

0.10

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Load Regulation (%)

Output Current (A)

8V 12V 16V

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ISL73007SEHEV3Z Evaluation Board Manual

Figure 14. Turn-on, 3Ωload Figure 15. Shorted Output into Restart after Hiccup

Figure 16. +1.5A Output Current Transient Figure 17. -1.5A Output Current Transient

Figure 18. Gain/Phase Bode Plot, IOUT = 2.5A Figure 19. Package Temperature at IOUT = 3A

Unless otherwise noted, PVIN = 12V; VOUT = 5V, fSW = 500kHz, TA= Room Ambient (Cont.)

VOUT

IOUT

VIN

LXV

IOUT

VOUT

IOUT

VOUT

IOUT

VOUT

-200

-150

-100

-50

100

150

200

-80

-60

-40

-20

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06

Phase Margin (deg)

Gain (dB)

Frequency (kHz)

Gain (dB) Phase (Deg)

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ISL73007SEHEV3Z Evaluation Board Manual

4. Ordering Information

5. Revision History

Part Number Description

ISL73007SEHEV3Z Radiation Hardened ISL73007SEH buck regulator evaluation board

Revision Date Description

1.00 Mar 23, 2022 Initial release

Corporate Headquarters

TOYOSU FORESIA, 3-2-24 Toyosu,

Koto-ku, Tokyo 135-0061, Japan

www.renesas.com

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(Rev.1.0 Mar 2020)

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