ISL85033DUALEVAL1Z Intersil, ISL85033DUALEVAL1Z Datasheet

ISL85033DUALEVAL1Z

Manufacturer Part Number

ISL85033DUALEVAL1Z

Description

EVAL BOARD 1 FOR ISL85033

Manufacturer

Intersil

Datasheets

1.ISL85033IRTZ.pdf (25 pages)

2.ISL85033DUALEVAL1Z.pdf (9 pages)

Specifications of ISL85033DUALEVAL1Z

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 9
Download datasheet (2Mb)

November 29, 2010

AN1574.2

ISL85033DUALEVAL1Z Wide VIN Dual Standard

Buck Regulator With 3A/3A Output Current

Description

The ISL85033DUALEVAL1Z kit is intended for use by

individuals with requirements for Point-of-Load

applications sourcing from 4.5V to 28V. The

ISL85033DUALEVAL1Z evaluation board is used to

demonstrate the performance of the ISL85033 wide VIN

dual standard buck regulator with 3A/3A output

current converter.

The ISL85033 is offered in a 4mmx4mm 28 Ld TQFN

package with 1mm maximum height. The complete

converter occupies 6.25cm

Key Features

• Wide Input Voltage Range from 4.5V to 28V

• Adjustable Output Voltage with Continuous Output

• Current Mode Control

• Adjustable Switching Frequency from 300kHz to 2MHz

• Independent Power-Good Detection

• Selectable In-Phase or Out-of-Phase PWMs Switching

• Independent, Sequential, Ratiometric or Absolute

• Internal 2ms Soft-start Time

• Overcurrent and Hiccup Mode Short Circuit

• Boot Undervoltage Detection

• Channels are Out-of-phase, Reducing Voltage Ripple

Recommended Equipment

The following materials are recommended to perform

testing:

• 0V to 30V Power Supply with at least 7A source

• Electronic Loads capable of sinking current up to 7A

• Digital Multimeters (DMMs)

• 100MHz quad-trace oscilloscope

• Signal generator

Current up to 3A

Operation

Tracking Between Outputs

Protection, Thermal Overload Protection, UVLO

and Component Size

current capability or 5V battery

1-888-INTERSIL or 1-888-468-3774

area.

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

Application Note 1574

Quick Setup Guide

Evaluating the Other Output Voltage

The ISL85033DUALEVAL1Z kit outputs are preset to 5V

for V

can be adjusted from 0.8V to 5V. The output voltage

programming resistor, R3 (or R14 in Channel 2), will

depend on the desired output voltage of the regulator

and the value for the feedback resistor R2 (R16

respectively), as shown in Equation 1.

If the output voltage desired is 0.8V, then R3 (R14

respectively) is shorted. The value for R2 (R16

respectively) is typically between 1k and 10k. Please

note that if VOUT is less than 2.5V, the switching

frequency and compensation must be changed for

300kHz operation due to minimum on-time limitation.

Please refer to the data sheet for further information

(FN6676).

Frequency Control

ISL85033 has an FS pin that controls the frequency of

operation. Programmable frequency allows for

optimization between efficiency and external

component size. Default switching frequency is 500kHz

when FS is tied to VCC (R9 = 0). By removing R9 and

connecting R10 to ground, the switching frequency

could be changed from 300kHz (R10 = 383k) to 2MHz

(R10 = 40.2k). Please refer to the data sheet

(FN6676) for calculating the value of R10. Do not leave

this pin floating.

R14

1. Ensure that the circuit is correctly connected to the

2. Connect the bias supply to VIN1, the plus terminal

3. Verify that the position is ON for S1 and S2.

4. Turn on the power supply.

5. Verify the output voltage is 5V for V

All other trademarks mentioned are the property of their respective owners.

supply and loads prior to applying any power.

to VIN1 and the negative return to GND2.

for V

OUT1

(

OUT1

OUT2.

OUT2

and 3.3V for V

–

) R2 V

•

) R16 V

•

⁄

OUT2

⁄

; however, output voltages

Author: Paul Orfanu

OUT1

and 3.3V

(EQ. 1)

Related parts for ISL85033DUALEVAL1Z

ISL85033DUALEVAL1Z Summary of contents

Page 1

... Turn on the power supply. 5. Verify the output voltage is 5V for V for V OUT2. Evaluating the Other Output Voltage The ISL85033DUALEVAL1Z kit outputs are preset to 5V for V and 3.3V for V OUT1 can be adjusted from 0.8V to 5V. The output voltage programming resistor, R3 (or R14 in Channel 2), will ...

Page 2

Disabling/enabling Function The ISL85033 evaluation board contains S1, S2 switches to enable or disable each of the channels, thus allowing low quiescent current state. Table 1 details this function. TABLE 1. SWITCH SETTINGS S1 S2 ON/OFF CONTROL ON OFF Enable ...

Page 3

... ISL85033DUALEVAL1Z Schematic VOUT1 C1 C13 JVO1 R3 68PF 42.2K 12PF COMP1 69.8K FB1 470PF 2 FB1 SS1 3 SS1 SS1 PGND1 8.06K OPEN BOOT1 5 BOOT1 C5 6 GND1 PHASE1 A A 0.01UF 7 PHASE1 29 A JLX1 A VO1 L1 A VOUT1 7UH VOUT1=5V D1 C14 C2 B340B DNP 47UF VIN1 VIN1 C18 ...

Page 4

PART NUMBER QTY UNITS ISL85033EVAL1ZREVBPCB 1 ea EEE-FK1V101P GMK325BJ106KN H1044-00120-50V5 H1044-00680-50V5 H1045-00103-50V10 H1045-00471-50V5 H1045-00475-6R3V10 H1045-DNP 0 ea H1082-00106-50V10 H1082-00476-16V20 SQL004 2 ea ...

Page 5

... TF, ROHS R4, R6 RES, SMD, 0603, 1M, 1/10W, 1%, TF, ROHS MANUFACTURER MANUFACTURER PART # KEYSTONE 1514-2 KEYSTONE 5002 KEYSTONE 5002 DIODES INC. B340B-13-F INTERSIL ISL85033IRTZ VENKEL CR0402-16W-00T PANASONIC ERJ-2GE0JR00 VENKEL CR0402-16W-2552FT PANASONIC ERJ-2RKF2552X VISHAY/DALE CRCW040225K5FKED STACKPOLE RMC 1/16S 25. PANASONIC ERJ-2RKF4222X VENKEL CR0402-16W-4222FT ...

Page 6

... Bottom four corners BUMPONS, 0.44’ 0.20’ H, DOMETOP, BLACK Place assy in bag BAG, STATIC, 5X8, ZIPLOC, ROHS D3-D6 DO NOT POPULATE OR PURCHASE RENAME PCB TO: LABEL, TO RENAME ISL85033DUALEVAL1Z BOARD LABEL, FOR SERIAL NUMBER AND BOM REV # MANUFACTURER MANUFACTURER PART # VENKEL CR0603-10W-6982FT YAGEO RC0603FR-0769K8L ...

Page 7

... ISL85033DUALEVAL1Z Board Layout 7 Application Note 1574 FIGURE 1. TOP LAYER COMPONENTS FIGURE 2. TOP LAYER ETCH AN1574.2 November 29, 2010 ...

Page 8

... ISL85033DUALEVAL1Z Board Layout 8 Application Note 1574 (Continued) FIGURE 3. SECOND LAYER ETCH FIGURE 4. THIRD LAYER ETCH AN1574.2 November 29, 2010 ...

Page 9

... ISL85033DUALEVAL1Z Board Layout 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 Application Note or Technical Brief is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com ...

Related keywords

ISL85033DUALEVAL1Z datasheet
ISL85033DUALEVAL1Z data sheet
ISL85033DUALEVAL1Z pdf datasheet
ISL85033DUALEVAL1Z component
ISL85033DUALEVAL1Z part
ISL85033DUALEVAL1Z distributor
ISL85033DUALEVAL1Z RoHS
ISL85033DUALEVAL1Z datasheet download