FN6885 Rev 1.00

Page 1 of 18

July 23, 2014

FN6885

Rev 1.00

July 23, 2014

ISL25700

Programmable Temperature Controlled MOSFET Driver

DATASHEET

The Temperature Controlled MOSFET Driver is a highly

integrated solution that combines a MOSFET driver with

overcurrent protection and two 8-bit resolution DACs on a

monolithic CMOS integrated circuit (IC).

The ISL25700 sets up and monitors temperature at the point of

interest, compares it with the user programmable setpoint, and

adjusts the output until the set temperature is reached. An external

power MOSFET, a heater, an NTC thermistor and the ISL25700 are

parts of the temperature control loop.

It also features programmable overcurrent protection of the

MOSFET. The current protection automatically adjusts the

output voltage in order to keep MOSFET power under user

defined limits. The protection settings always override the

temperature settings that cause violation of the current limit.

There is an additional 8-bit General Purpose DAC that is

available for application specific use.

The ISL25700 can be used in a variety of applications where

constant temperature is a key parameter.

Applications

• Oven Controlled Applications with Micro Temperature

Chamber in:

-Basestations

-Spectrometers

- Precision Meters

- Precision Generators

Features

• Setpoint temperature range from +40°C to +110°C

• Operational temperature range from -40°C to +125°C

• 3°C initial setpoint accuracy

• Coarse and fine tuning setpoint control

- +15°C coarse adjustment

- +0.1°C fine adjustment

• ±0.5°C long-term drift error

• Programmable current protection of external MOSFET

• 5-bit Selectable Gain Control

• Wide Power Supply Range: 3V to 15V

•Works with 20k

 to 200k External NTC Thermistor

• General Purpose 8-bit DAC - 0.4% Output Resolution

• High Reliability

- Endurance: 10,000 Data Changes per Bit per Register

- Register Data Retention: 10 years @ T

 +125°C

• 10 Lead µTQFN 2.1mmx1.6mm Package

• Pb-free (RoHS Compliant)

Related Literature

Limitation of the ISL25700”

FIGURE 1. TYPICAL TEMPERATURE SETTLING TIME

100

80

60

40

20

0

03

69

12

15

TIME (MINUTES)

NOT RECOMMENDED FOR NEW DESIGNS

NO RECOMMENDED REPLACEMENT

contact our Technical Support Center at

1-888-INTERSIL or www.intersil.com/tsc