廬
IS-1845ASRH
Data Sheet
October 2003
FN9001.3
Single Event Radiation Hardened
High Speed, Current Mode PWM
The IS-1845ASRH is designed to be
used in switching power supplies
operating in current-mode. The
rising edge of the on-chip oscillator
turns on the output. Turn-off is controlled by the current
sense comparator and occurs when the sensed current
reaches a peak controlled by the error amplifier.
TM
Features
鈥?Electrically Screened to DSCC SMD # 5962-01509
鈥?QML Qualified per MIL-PRF-38535 Requirements
鈥?Radiation Environment
- Total Dose . . . . . . . . . . . . . . . . . . . . 300 krad(SI) (Max)
- SEL Immune. . . . . . . . . . . . . . . . . Dielectrically Isolated
- SEU Immune . . . . . . . . . . . . . . . . . . . . 35MeV/mg/cm
2
- SEU Cross-Section at 89MeV/mg/cm
2
. . . . 5 x 10
-6
cm
2
鈥?Low Start-up Current . . . . . . . . . . . . . . . . . . . 100碌A(chǔ) (Typ)
鈥?Fast Propagation Delay . . . . . . . . . . . . . . . . . . 80ns (Typ)
鈥?Supply Voltage Range . . . . . . . . . . . . . . . . . . . 12V to 20V
鈥?High Output Drive. . . . . . . . . . . . . . . . . . . . 1A (Peak, Typ)
鈥?Under Voltage Lockout. .8.8V Start (Typ), 8.2V Stop (Typ)
Constructed with Intersil鈥檚 Rad Hard Silicon Gate (RSG)
dielectrically isolated BiCMOS process, these devices are
immune to single event latch-up and have been specifically
designed to provide a high level of immunity to single event
transients. All specified parameters are guaranteed and
tested for 300krad(Si) total dose performance.
Detailed Electrical Specifications for these devices are
contained in SMD 5962-01509. A 鈥渉ot-link鈥?is provided on
our website for downloading the SMD.
Applications
鈥?Current-Mode Switching Power Supplies
鈥?Control of High Current FET Drivers
Pinouts
IS7-1845ASRH (CDIP2-T8 SBDIP)
TOP VIEW
COMP
VFB
ISENSE
RTCT
1
2
3
4
8
7
6
5
VREF
VCC
OUT
GND
鈥?Motor Speed and Direction Control
Ordering Information
ORDERING NUMBER
5962F0150901VPC
5962F0150901QPC
5962F0150901VXC
5962F0150901QXC
INTERNAL
MKT. NUMBER
IS7-1845ASRH-Q
IS7-1845ASRH-8
IS9-1845ASRH-Q
IS9-1845ASRH-8
IS1-1845ASRH/Proto
IS9-1845ASRH/Proto
TEMP. RANGE
(
o
C)
-50 to 125
-50 to 125
-50 to 125
-50 to 125
-50 to 125
-50 to 125
IS9-1845ASRH (FLATPACK)
TOP VIEW
NC
COMP
VFB
NC
NC
NC
ISENSE
RTCT
NC
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
NC
VREF
VCC
VC
OUT
NC
GND
OSCGND
NC
IS7-1845ASRH/Proto
IS9-1845ASRH/Proto
NOTES:
1. Grounding the Comp pin does not inhibit the output. The output
may be inhibited by applying >1.2V to the ISENSE pin.
2. This part should be operated with CT=3.3nF and RT=10k timing
components only.
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2003. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
INTERSIL
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