®
IS-1825ASRH, ISL71823ASRH
Data Sheet
September 25, 2008
FN9065.3
Single Event and Total Dose Hardened,
High-Speed, Dual Output PWMs
The single event and total dose hardened IS-1825ASRH and
ISL71823ASRH pulse width modulators are designed to be
used in high frequency, switching power supplies in either
voltage or current-mode configurations. Both designs
include 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 IS-1825ASRH features dual, alternating outputs
operating from zero to less than 50% duty-cycle, while the
ISL71823ASRH features dual, in-phase outputs operating
from zero to less than 100% duty cycle.
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/1823A Types
• Pulse-by-Pulse Current Limiting
• Latched Overcurrent Comparator with Full Cycle Restart
• Programmable Leading Edge Blanking
Applications
• Voltage or Current-Mode Switching Power Supplies
• Control of High Current MOSFET Drivers
• Motor Speed and Direction Control
Pinouts
IS1-1825ASRH, ISL71823ASRHQD
(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
NC
INV
NON-INV
E/A OUT
CLK/LEB
RT
CT
RAMP
SS
NC
IS9-1825ASRH, ISL71823ASRHQF
(CDFP4-F20 FLATPACK)
TOP VIEW
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
ILIM/SD
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, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
IS-1825ASRH, ISL71823ASRH
Die Characteristics
DIE DIMENSIONS:
4310µm x 5840µm (170 mils x 230 mils)
Thickness: 483µm ± 25.4µm (19 mils ± 1 mil)
INTERFACE MATERIALS
Glassivation
Type: Phosphorus Silicon Glass (PSG)
Thickness: 8.0kA ± 1.0kA
Top Metallization
Type: AlSiCu
Thickness: 16.0kA ± 2kA
Substrate:
Radiation Hardened Silicon Gate,
Dielectric Isolation
Backside Finish:
Silicon
ASSEMBLY RELATED INFORMATION
Substrate Potential:
Unbiased (DI)
ADDITIONAL INFORMATION
Worst Case Current Density:
<2.0 x 10
5
A/cm
2
Transistor Count:
585
Metallization Mask Layout
IS-1825ASRH/ISL71823ASRH
RT
CT
RAMP
SS
RT
ILIM/SD
OGND
GND
CLK/LEB
E/A OUT
NON-INV
INV
VREF
VCC
OUT A
OUT B
PGND
VC
VC
PGND
Notes:
1. Both the OGND (oscillator ground) and the GND (control circuit ground) pads must be bonded to ground.
These pads are both bonded to the GND pin on the packaged devices.
2. All double-sized bond pads must be double bonded for current sharing purposes.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
3
FN9065.3
September 25, 2008
Analog electronics
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