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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/cm2(max) * Oscillator Frequency . . . . . . . . . . . . . . . . . . . .1MHz(max) * High Output Drive Current . . . . . . . . . . . . . . .1A peak(typ) * Low Start-up Current . . . . . . . . . . . . . . . . . . . 300A(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 (c) Intersil Americas Inc. 2002, 2005, 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
IS-1825ASRH, ISL71823ASRH Ordering Information
ORDERING NUMBER IS0-1825ASRH/SAMPLE 5962F0251101V9A 5962F0251101QEC 5962F0251101QXC 5962F0251101VEC 5962F0251101VXC IS1-1825ASRH/Proto IS9-1825ASRH/Proto 5962F0251102QEC 5962F0251102QXC 5962F0251102VEC 5962F0251102VXC ISL71823ASRHD/Proto ISL71823ASRHF/Proto INTERNAL MKT. NUMBER IS0-1825ASRH/SAMPLE IS0-1825ASRH-Q IS1-1825ASRH-8 IS9-1825ASRH-8 IS1-1825ASRH-Q IS9-1825ASRH-Q IS1-1825ASRH/Proto IS9-1825ASRH/Proto ISL71823ASRHQD ISL71823ASRHQF ISL71823ASRHVD ISL71823ASRHVF ISL71823ASRHD/Proto ISL71823ASRHF/Proto TEMP. RANGE (C) -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 -50 to +125 16 Ld SBDIP 20 Ld Flatpack 16 Ld SBDIP 20 Ld Flatpack 16 Ld SBDIP 20 Ld Flatpack 16 Ld SBDIP 20 Ld Flatpack 16 Ld SBDIP 20 Ld Flatpack 16 Ld SBDIP 20 Ld Flatpack D16.3 K20.A D16.3 K20.A D16.3 K20.A D16.3 K20.A D16.3 K20.A D16.3 K20.A PACKAGE PKG DWG. #
Typical Performance Curves
10k C220pF C470pF FREQUENCY (Hz) C2200pF C4700pF 100 60 C10nF 10 C22nF 1 10 Rt TIMING RESISTANCE (k) 100 50 1 10 Rt TIMING RESISTANCE (k) 100 DMAX (%) 1k C1000pF 80 70 100 90 DMAX
FIGURE 1. OSCILLATOR FREQUENCY vs Rt and Ct
FIGURE 2. MAXIMUM DUTY CYCLE vs Rt
2
FN9065.3 September 25, 2008
IS-1825ASRH, ISL71823ASRH Die Characteristics
DIE DIMENSIONS: 4310m x 5840m (170 mils x 230 mils) Thickness: 483m 25.4m (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 105 A/cm2 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

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