1

®

HS-1825ARH

Radiation Hardened High-Speed, Dual

Output PWM

The Radiation Hardened HS-1825ARH Pulse Width

Modulator is designed to be used in high frequency

switched-mode power supplies and can be used in either

current-mode or voltage-mode. It is well suited for

single-ended boost converter applications.

Device features include a precision voltage reference, low

power start-up circuit, high frequency oscillator, wide-band

error amplifier, and fast current-limit comparator. The use of

proprietary process capabilities and unique design

techniques results in fast propagation delay times and high

output current over a wide range of output voltages.

Constructed with the Intersil Rad Hard Silicon Gate (RSG)

Dielectric Isolation BiCMOS process, the HS-1825ARH has

been specifically designed to provide highly reliable

performance when exposed to harsh radiation

environments.

Specifications for Rad Hard QML devices are controlled

by the Defense Supply Center in Columbus (DSCC). The

SMD numbers listed below must be used when ordering.

Detailed Electrical Specifications for the HS-1825ARH

are contained in SMD 5962-99558. That document may

be easily downloaded from our website.

www.intersil.com/

Features

• Electrically Screened to DESC SMD # 5962-99558

• QML Qualified per MIL-PRF-38535 Requirements

• Radiation Environment

- Maximum Total Dose . . . . . . . . . . . . . . . . 300 krad(SI)

- Vertical Architecture Provides Low Dose Rate Immunity

- DI RSG Process Provides Latch-Up Immunity

• Low Start-Up Current . . . . . . . . . . . . . . . . . . . 100µA (Typ)

• Fast Propagation Delay . . . . . . . . . . . . . . . . . . 80ns (Typ)

• 12V to 30V Operation

• 1A (Peak) Dual Output Drive Capability

• 5.1V Reference

• Undervoltage Lockout

• Programmable Soft-Start

• Switching Frequencies to 500kHz

• Latched Overcurrent Comparator with Full Cycle Restart

• Programmable Leading Edge Blanking Circuit

Applications

• Current or Voltage Mode Switching Power Supplies

• Motor Speed and Direction Control

Pinout

HS-1825ARH

SBDIP (CDIP2-T16) AND FLATPACK (CDFP4-F16)

TOP VIEW

NOTE: Grounding the Soft-Start pin does not inhibit the outputs. The

outputs may be inhibited by applying >1.26V to the ILIM/SD pin.

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

INV

NON-INV

E/A OUT

CLOCK

RT

CT

SOFT START

RAMP

VREF 5.1V

OUTPUT B

VC

POWER GND

OUTPUT A

GND

ILIM/SD

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

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

Copyright © Intersil Americas Inc. 2002, 2005, 2008. All Rights Reserved

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

Data Sheet

September 25, 2008

FN4561.8