ISL854102

FN8870 Rev.1.00

Page 5 of 21

Mar 15, 2019

Functional Block Diagram

FIGURE 5. FUNCTIONAL BLOCK DIAGRAM

GATE

DRIVE AND

DEADTIME

BIAS

LDO

OSCILLATOR

PFM

CURRENT

SET

FAULT

LOGIC

450mV/T SLOPE

COMPENSATION

(PWM ONLY)

500mV/A

CURRENT SENSE

PWM/PFM

SELECT LOGIC

EN/SOFT-

START

ZERO CURRENT

DETECTION

PWM

PWM

600mV VREF

150k

54pF

INTERNAL

COMPENSATION

s

R

Q

Q

POWER-

GOOD

LOGIC

FB

INTERNAL = 50µA/V

EXTERNAL = 230µA/V

5M

5M

PGND

PHASE

BOOT

VCC

VIN

EN

FB

FS

SYNC

COMP

PG

GND

PACKAGE

PADDLE

SS

FB

Ordering Information

PART NUMBER

(Notes 3, 4)

PART

MARKING

TEMP. RANGE

(°C)

TAPE AND REEL

(Units) (Note 2)

PACKAGE

(RoHS Compliant)

PKG.

DWG. #

ISL854102FRZ

4102

-40 to +125

-

12 Ld DFN

L12.4x3

ISL854102FRZ-T

4102

-40 to +125

6k

12 Ld DFN

L12.4x3

ISL854102FRZ-T7A

4102

-40 to +125

250

12 Ld DFN

L12.4x3

ISL854102EVAL1Z

Buck regulator evaluation board

ISL854102DEMO1Z

Buck regulator demonstration board (compact version)

ISL854102DEMO2Z

Dual output Isolated buck converter

ISL854102DEMO3Z

Dual output Isolated buck-boost converter

NOTES:

2. See TB347 for details about reel specifications.

3. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate

plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Pb-free products are

MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

4. For Moisture Sensitivity Level (MSL), see the ISL854102 device page. For more information about MSL, see TB363.