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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 . . . . . . . . . . . . . . . . . . . 100A (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
VCC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
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