®
IS-1825ASRH
Data Sheet
June 14, 2005
FN9065.1
Single Event and Total Dose Hardened,
High-Speed, Dual Output PWM
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.
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.
Detailed Electrical Specifications for these devices are
contained in SMD 5962-02511. A “hot-link” is provided
on our website for downloading the SMD.
Features
• Electrically Screened to DSCC SMD # 5962-02511
• QML Qualified per MIL-PRF-38535 Requirements
• Radiation Environment
- Total Dose. . . . . . . . . . . . . . . . . . . . . 300krad(SI) (max)
- Latch-up Immune . . . . . . . . . . . . . Dielectrically Isolated
- SEU immune . . . . . . . . . . . LET=35MeV/mg/cm
2
(max)
• Oscillator Frequency . . . . . . . . . . . . . . . . . . . .1MHz(max)
• High Output Drive Current . . . . . . . . . . . . . . .1A peak(typ)
• Low Start-up Current . . . . . . . . . . . . . . . . . . . 300µA(max)
• Undervoltage Lockout
- Start Threshold . . . . . . . . . . . . . . . . . . . . . . . .8.8V(max)
- Stop Threshold . . . . . . . . . . . . . . . . . . . . . . . . 7.6V(min)
- Hysteresis. . . . . . . . . . . . . . . . . . . . . . . . . . 300mV(min)
• Improved Soft-Start Function Compared with Commercial
1825A Types
• Pulse-by-Pulse Current Limiting
• Latched Overcurrent Comparator with Full Cycle Restart
• Programmable Leading Edge Blanking
Pinout
IS1-1825ASRH (CDIP2-T16 SBDIP)
TOP VIEW
INV 1
NON-INV 2
E/A OUT 3
CLK/LEB 4
RT 5
CT 6
RAMP 7
SS 8
16 VREF
15 VCC
14 OUT B
13 VC
12 PGND
11 OUT A
10 GND
9 ILIM/SD
Applications
• Voltage or Current-Mode Switching Power Supplies
• Control of High Current MOSFET Drivers
• Motor Speed and Direction Control
Ordering Information
ORDERING NUMBER
5962F0251101QEC
5962F0251101QXC
5962F0251101VEC
VREF
VCC
OUT B
PGND
VC
VC
PGND
OUT A
GND
ILIM/SD
INTERNAL
MKT. NUMBER
IS1-1825ASRH-8
IS9-1825ASRH-8
IS1-1825ASRH-Q
IS9-1825ASRH-Q
IS1-1825ASRH/Proto
IS9-1825ASRH/Proto
TEMP. RANGE
(°C)
-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
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
5962F0251101VXC
IS1-1825ASRH/Proto
IS9-1825ASRH/Proto
NON-INV
E/A OUT
CLK/LEB
RT
CT
RAMP
SS
NC
1
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
All other trademarks mentioned are the property of their respective owners.
INTERSIL [ INTERSIL CORPORATION ]
