Intersil ISL73007SEHEV2Z Manual de usuario

Evaluation Board Manual

R34UZ0007EU0100 Rev.1.00 Page 1

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

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Mar 23, 2022

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

R34UZ0007EU0100 Rev.1.00 Page 7

Mar 23, 2022

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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Mar 23, 2022

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

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

R34UZ0007EU0100 Rev.1.00 Page 9

Mar 23, 2022

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

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 (°)

Gain (dB)

Frequency (Hz)

Gain (dB)

Phase (Deg)

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TOYOSU FORESIA, 3-2-24 Toyosu,

Koto-ku, Tokyo 135-0061, Japan

www.renesas.com

Contact Information

For further information on a product, technology, the most

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(Rev.1.0 Mar 2020)

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