ISL68225IRAZ datasheet(13/107 Pages) RENESAS

13 / 107 page

ISL68225, ISL68236

1. Overview

R16DS0047EU0100 Rev.1.00

Page 13 of 106

Oct.1.20

1.5

Functional Pin Descriptions

See Table 5 on page 33 for design layout considerations.

ISL68225 Pin

Number

ISL68236 Pin

Number

Pin Name

Description

4, 3, 2, 1, 52,

51, 50, 49, 48

4, 3, 2, 1, 52,

51, 50, 49, 48

PWM[8:0]

Pulse-Width Modulation (PWM) outputs. Connect these pins to the PWM input pins of

3.3V logic-compatible smart power stages, driver ICs, or DrMOS.

CFP

Catastrophic fault protection output. This active, high-logic signal can be configured to

alert the host to major fault events.

nVRHOT

Thermal warning indicator. This open-drain output is pulled low if a sensed

over-temperature occurs at the TEMP pins.

DNC

Do not connect any signals to these pins.

GND

Connect to ground

DNC

Do not connect any signals to these pins.

GND

Connect to ground.

AVS_VDDIO

AVSBus reference voltage input. Leave open if not used.

AVS_MDA

AVSBus data input pin. Connect to ground if not used.

AVS_SDA

AVSBus data output pin. Leave open if not used.

AVS_CLK

Synchronous clock signal input of the AVSBus. Connect to ground if not used.

12, 11

EN[1:0]

Input pin used for enable control of outputs. Connect to ground if not used.

14, 13

PG[1:0]

Open-drain, power-good indicator for outputs.

VINSEN

Input voltage sense pin for the VIN supply voltage.

VMON

Input voltage sense pin for the driver supply voltage.

17, 19, 21, 23,

25, 27, 29, 31,

17, 19, 21, 23,

25, 27, 29, 31,

CSRTN[8:0]

The CS and CSRTN pins are current-sense inputs to the individual phase differential

amplifiers. Unused phases should have their respective current-sense inputs

grounded. These pins support smart power stage, DCR, and resistor sensing.

Connection details depend on the current-sense method chosen.

18, 20, 22, 24,

26, 28, 30, 32,

18, 20, 22, 24,

26, 28, 30, 32,

CS[8:0]

38, 35

RGND[1:0]

Negative differential voltage sense input for the outputs. Connect to the negative

remote sensing point. Connect to ground if not used.

39, 36

VSEN[1:0]

Positive differential voltage sense input for the outputs. Connect to the positive remote

sensing point. Connect to ground if not used.

40, 37

TEMP[1:0]

Input pin for sensing external temperature measurement at outputs. Supports NTC-

based temperature sensing and smart power stage sensing. Connect to ground if not

used.

CONFIG

Configuration ID selection pin. Attach a resistor from this pin to GND.

ADDRESS

SMBus/PMBus address selection pin. Attach a resistor from this pin to GND.

VCC

Chip primary bias input. Connect this pin directly to a +3.3V supply with a 1µF or

greater MLCC bypass capacitor.

VCCS

Internally generated 1.2V LDO logic supply from VCC. Decouple with a 4.7µF or

greater MLCC (X5R or better).

nPMALERT

Open-drain output pin for alerting the SMBus host.

PMSCL

Serial clock signal pin for the SMBus interface.

PMSDA

Serial data signal pin for the SMBus interface.

EPAD

GND

The package pad serves as the GND return for all IC functions. Connect directly to the

system GND plane with multiple vias.

ISL68225IRAZ Datasheet(PDF) 13 Page - Renesas Technology Corp

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