IS-1825ASRH
®
Data Sheet
June 14, 2005
FN9065.1
Single Event and Total Dose Hardened,
High-Speed, Dual Output PWM
Features
• Electrically Screened to DSCC SMD # 5962-02511
The single event and total dose hardened IS-1825ASRH
pulse width modulator is designed to be used in high
frequency, switching power supplies in either voltage or
current-mode configurations. The design includes a
precision voltage reference, a low power start-up circuit, a
high frequency oscillator, a wide-band error amplifier and a
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.
• QML Qualified per MIL-PRF-38535 Requirements
• Radiation Environment
- Total Dose. . . . . . . . . . . . . . . . . . . . . 300krad(SI) (max)
- Latch-up Immune . . . . . . . . . . . . . Dielectrically Isolated
2
- SEU immune . . . . . . . . . . . LET=35MeV/mg/cm (max)
• Oscillator Frequency . . . . . . . . . . . . . . . . . . . .1MHz(max)
• High Output Drive Current . . . . . . . . . . . . . . .1A peak(typ)
• Low Start-up Current . . . . . . . . . . . . . . . . . . . 300µA(max)
Constructed with the Intersil 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.
• Undervoltage Lockout
- Start Threshold . . . . . . . . . . . . . . . . . . . . . . . .8.8V(max)
- Stop Threshold . . . . . . . . . . . . . . . . . . . . . . . . 7.6V(min)
- Hysteresis. . . . . . . . . . . . . . . . . . . . . . . . . . 300mV(min)
• Improved Soft-Start Function Compared with Commercial
1825A Types
Detailed Electrical Specifications for these devices are
contained in SMD 5962-02511. A “hot-link” is provided
on our website for downloading the SMD.
• Pulse-by-Pulse Current Limiting
• Latched Overcurrent Comparator with Full Cycle Restart
• Programmable Leading Edge Blanking
Pinout
IS1-1825ASRH (CDIP2-T16 SBDIP)
Applications
TOP VIEW
• Voltage or Current-Mode Switching Power Supplies
• Control of High Current MOSFET Drivers
• Motor Speed and Direction Control
INV
NON-INV
E/A OUT
CLK/LEB
RT
1
2
3
4
5
6
7
8
16 VREF
15 VCC
14 OUT B
13 VC
Ordering Information
12 PGND
11 OUT A
10 GND
CT
INTERNAL
TEMP. RANGE
(°C)
ORDERING NUMBER
5962F0251101QEC
5962F0251101QXC
5962F0251101VEC
5962F0251101VXC
IS1-1825ASRH/Proto
IS9-1825ASRH/Proto
MKT. NUMBER
RAMP
SS
9
ILIM/SD
IS1-1825ASRH-8
IS9-1825ASRH-8
IS1-1825ASRH-Q
IS9-1825ASRH-Q
IS1-1825ASRH/Proto
IS9-1825ASRH/Proto
-50 to 125
-50 to 125
-50 to 125
-50 to 125
-50 to 125
-50 to 125
IS9-1825ASRH (CDFP4-F20 FLATPACK)
TOP VIEW
NC
INV
NON-INV
E/A OUT
CLK/LEB
RT
CT
RAMP
SS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VREF
VCC
OUT B
PGND
VC
VC
PGND
OUT A
GND
NC
ILIM/SD
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 trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002, 2005. All Rights Reserved
1
All other trademarks mentioned are the property of their respective owners.