RHFL7913A Rad-hard adjustable negative voltage regulator Features ■ 3 A low dropout voltage ■ Optional overtemperature and overcurrent protection ■ Adjustable overcurrent limitation ■ Load short circuit monitoring ■ Adjustable output voltage ■ Inhibit (ON/OFF) TTL-compatible control ■ Programmable output short-circuit current limitation ■ Remote sensing operation ■ Rad-hard: sustains 300 krad in Mil-1019.7 at High & ELDRS low dose rate conditions ■ Heavy ions, SEL immune at 68 MeV/cm²/mg LET ions December 2011 FLAT-16 SMD5C: 5-connection SMD Description The RHFL7913A adjustable is a high performance Rad hard negative voltage regulator. Available in FLAT-16 and new SMD5C hermetic ceramic packages, it is specifically intended for space and harsh radiation environments. It provides exceptional electrical performances, high speed and low dropout voltage. Input supply ranges from - 3 V to - 12 V. It also provide logical control / monitor functions (inhibit, output monitor, short-circuit control) from/to external positive voltage signals, while the entire RHFL7913A adjustable analog functions are biased at negative voltages with respect of ground pin. The device is QML-V qualified with SMD 5962-02532. Doc ID 12344 Rev 7 1/19 www.st.com 19 Contents RHFL7913A Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 5.1 ADJ pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 Inhibit ON-OFF control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.3 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.4 Overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.5 OCM pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.6 Alternates to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.1 Remote sensing operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Die information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 10 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 Doc ID 12344 Rev 7 RHFL7913A Diagram 1 Diagram Figure 1. Block diagram Doc ID 12344 Rev 7 3/19 Pin configuration RHFL7913A 2 Pin configuration Figure 2. Pin configuration (top view for FLAT-16, bottom view for SMD5C) FLAT-16 Table 1. SMD5C Pin description Pin n° FLAT-16 (1) SMD5C (2) DSCC Part Ident. 5962-02532 5962-02532 1 VI, Negative Input VO, Negative Output 2 VI, Negative Input ADJ 3 VI, Negative Input Inhibit 4 ISC GND 5 OCM VI, Negative Input 6 VPLUS, Positive Supply 7 GND 8 N.C. 9 N.C. 10 GND 11 Inhibit 12 ADJ 13 N.C. 14 VO, Negative Output 15 VO, Negative Output 16 VO, Negative Output 1. The upper metallic package lid and the bottom metallization are neither connected to regulator die nor to package terminals, hence electrically floating. 2. The upper metallic package lid is neither connected to regulator die nor to package terminals, hence electrically floating. 4/19 Doc ID 12344 Rev 7 RHFL7913A Maximum ratings 3 Maximum ratings Table 2. Maximum operating ratings Symbol VI Parameter Value DC input voltage |VIN – VPLUS| -12 Logical block supply voltage V(+)-V(GND), unless grounded +5 VI DC voltage, VIN–GND, VPLUS= 0V -12 VI DC voltage, VIN–GND, VPLUS=+3V -9 VO DC output voltage range VPLUS IOUT PD Unit V -9 to -1.20 RHFL7913KPA 2 RHFL7913SCA 3 RHFL7913KPA 15 RHFL7913SCA 15 Output current A TC = 25 °C power dissipation W TSTG Storage temperature range -65 to +150 TOP Operating junction temperature range -55 to +150 ESD Electrostatic discharge capability °C Class 3 Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 3. Thermal data Symbol Parameter Value Unit RthJC Thermal resistance junction-case, FLAT-16 and SMD5C 8.3 °C/W TSOLD Maximum soldering temperature, 10 sec. 300 °C Value Unit -12 to -1.3 V 0 to +3 V VPLUS=0V, VI= -12 to -3.7V -9.5 to -1.2 V VPLUS=+3V, VI= -9 to -3.7V -6.5 to -1.2 V -55 to +125 °C Table 4. Recommended operating conditions Symbol VI Parameter Input voltage range VI (at VPLUS= 0V) VPLUS Positive supply range VO Output voltage range TA Ambient operating temperature range Doc ID 12344 Rev 7 5/19 Electrical characteristics 4 RHFL7913A Electrical characteristics TJ = 25 °C, VI = VO + 2.5 V, CI = CO = 1 µF, unless otherwise specified. Table 5. Symbol VI VO Electrical characteristics Parameter Operating input voltage IO= 1A (KPA) or 2A (SCA) Operating output voltage ΔVO/ΔVI Line regulation ΔVO/VO IQ IQ 6/19 Test conditions Load regulation Quiescent current ON MODE Quiescent current OFF MODE Min. Typ. Max. -12 V IO= 1A, VO = -1.2V, FLAT 16 -1.28 -1.16 IO= 1A, VO = -9V, FLAT 16 -9.6 -8.7 IO= 2A, VO = -1.2V, SMD5C -1.28 -1.16 IO= 2A, VO = -9V, SMD5C -9.6 -8.7 V VI = VO - 2.5V to -12V, IO = 5mA, TJ = 25°C 0.2 VI = VO - 2.5V to -12V, IO = 5mA, TJ = -55°C and +125°C 0.5 VI = VO - 2.5V, IO = 5mA to 400mA, TJ = 25°C 0.4 VI = VO - 2.5V, IO = 5mA to 400mA TJ = -55°C and +125°C 0.5 VI = VO - 2.5V, IO =-5mA to 1A, TJ = 25°C 0.5 VI = VO - 2.5V, IO = 5mA to 1A, TJ = -55°C and +125°C 0.6 % IO = 5mA, VI = VO -2.5V, TJ = 25°C -3 IO =-30mA, VI = VO -2.5V, TJ = 25°C -6 IO = 300mA VI = VO -2.5V, TJ = 25°C and +125°C -15 IO = 300mA VI = VO -2.5V, TJ = -55°C -20 IO = 1A VI = VO -2.5V, TJ = 25°C and +125°C -30 IO = 1A VI = VO -2.5V, TJ = -55°C -50 IO = 3A VI = VO -2.5V, VINH= 0, TJ = +25°C and +125°C Only for SMD5C -90 IO = 2A VI = VO -2.5V, VINH= 0, TJ = -55°C Only for SMD5C, TBD VO = -1.2V, VI = -7V, VPLUS = +5V, VINH > 2.3V, TJ = -55°C to +125°C Doc ID 12344 Rev 7 Unit mA 1 mA RHFL7913A Table 5. Symbol VD IPLUS Electrical characteristics Electrical characteristics (continued) Parameter Dropout voltage (1) VPLUS Current Test conditions Min. IO = 400mA VO =-2.5V to -9V, TJ = 25°C -450 IO = 400mA VO =-2.5V to -9V, TJ = -55°C and +125°C -500 IO = 1A VO =-2.5V to -9V, TJ = 25°C -750 IO = 1A VO =-2.5V to -9V, TJ = -55°C and +125°C -800 Typ. Max. mV VI = -5.5V, VPLUS = 5V, VINH = 5V, TJ = 25°C 0.75 VI= -5.5V, VPLUS = +5V, VINH = 5V TJ = -55°C and +125°C 1 mA Supply voltage rejection VI = VO – 2.5V, IO = 5mA, F = 120Hz 60 VI = VO – 2.5V, IO= 5mA, F = 33kHz 20 tPLH (1) Inhibit propagation delay VINH < 0.8V, VPLUS = 5V, VI = VO -2.5V IO = 400mA 20 (1) Inhibit propagation delay VINH >2.3V, VPLUS = 5V, VI = VO -2.5V IO = 400mA 100 Inhibit voltage VI = -7V VPLUS= +5V IO = 5mA TJ = -55°C to 125°C SVR (1) tPHL VINH(ON) VINH(OFF) ISH VOCM en Shutdown input current VINH=5V OCM pin voltage Sinked IOCM = 10mA, active low Output noise voltage f = 10Hz to 100kHz IO = 5mA to 2A Unit dB µs 0.8 V 2.3 15 µA 0.38 V 40 µVrms 1. These values are guaranteed by design. For each application it’s strongly recommended to comply with the maximum current limit of the package used. Doc ID 12344 Rev 7 7/19 Device description 5 RHFL7913A Device description The RHFL7913A adjustable contains a NPN-type power element controlled by signal resulting from amplified comparison between internal temperature compensated band-gap cell and the fraction of the desired output voltage value, generated by an external resistor divider bridge. The NPN structure allows access to lower drop out levels because its base current can be routed to ground pin and not to output. To control and monitor the device from / to the external logic world – usually operating in positive voltage area – a dedicated logic interface block (INHIBIT and OCM functions) has been implemented with +3 V to +5 V supplied line V(+). In case V(+) = 0 V, inhibit and OCM functions are not available: In this condition, INHIBIT function is ON and OCM pin is “no care”. The device is internally protected by several blocks. 5.1 ADJ pin The load voltage feed back comes from an external divider resistor bridge middle point to ADJ pin established between load terminals. 5.2 Inhibit ON-OFF control When INHIBIT pin is TTL-high (positive), the device switches off current and voltage output. The device is ON when INHIBIT pin is set TTL-low. 5.3 Overtemperature protection A temperature detector internally monitors power element junction temperature. The device goes OFF circa 165 ° - 175 °C are reached, and returns ON when circa 100 °C. When internal temperature detector reaches 170 °C, the active power element can be at 225 °C: Device reliability cannot be granted during extensive operation duration with these conditions. 5.4 Overcurrent protection ISC pin. An internal non-fold back short-circuit limitation is set with ISHORT > 4 A (VO is 0 V). This value can be downward modified by an external resistor connected between ISC and VI pins, with a typical value range of 10 kΩ to 200 kΩ. To keep excellent VO regulation, it is necessary to set ISHORT 1.6 times greater than the maximum desired application IO. When IO reaches ISHORT – 300 mA, the current limitor overrules regulation and VO starts to drop and OCM flag is risen. When no current limitation adjustment is required, ISC pin shall be left unbiased (as it is in 3 pin packages). 5.5 OCM pin Goes low when current limitor starts to be active, otherwise VOCM = V (+). It is bufferized and can sink 10 mA. OCM pin is internally pulled-up by a 50 kΩ resistor. Can left open when V (+) = 0. 8/19 Doc ID 12344 Rev 7 RHFL7913A 5.6 Device description Alternates to RHFL7913A is recommended to replace all industry negative regulators due to its exceptional radiation performances. To replace 3-terminal industry devices, use customized RHFL7913 fixed voltage versions. Doc ID 12344 Rev 7 9/19 Application information 6 RHFL7913A Application information Adjusting output voltage: R1 resistor must be connected between VO and ADJ pins. R2 resistor must be connected between ADJ and GND pins. Resistor values can be derived from the following formula: VO = VADJ (1 + R1/R2) with VADJ = -1.20 V To access all RHFL7913A adjustable functionality, V (+) shall be set at 3.0 V (max 5 V). As a consequence, VI (-) cannot be greater than –9.0 V (resp. –7 V) due to –12 V maximum operation rating. The device is functional as soon as VI - VO voltage difference is slightly above power element saturation voltage. The adjustable pin to Ground resistor shall not be greater than 10 kΩ to make output feedback error be below 0.2%. A minimum 0.5 mA IO is necessary to set to ensure perfect “no-load” regulation. It can be wise to dissipate this current into the divider bridge resistor. All available VI pins shall always be PCB interconnected, the same for all available VO pins, otherwise device stability and reliability cannot be granted. The INHIBIT function switches off output current in an electronic way, is very quickly. According to Lenz’ Law, external circuitry reacts with –LdI/dt terms which can be of high amplitude in case some seriesinductance exists. Effect would be large transient voltage developed on both device terminals. External Schottky diodes set on VI and VO may prevent voltage excursions beyond max ratings. In the worst case, a 14 V Zener diode shall protect the device input. In case of capacitive load, a input-output protection diode can be necessary to prevent VO to be greater than VI during transient operation. The device has been designed for high stability and low drop out operation: minimum 1 µF input and output tantalum capacitors are therefore mandatory. Typical industry PCB design practices 10 µF capacitors values are acceptable. Capacitor ESR range is from 0.020 Ω to over 20 Ω. Such range turns out to be useful when ESR increases at low temperature. When large transient currents are expected, larger value capacitors are necessary. In case of high current operation with expected short-circuit events, caution shall be considered relatively to capacitors. They shall be connected as close as possible form device terminals. As some tantalum capacitors may permanently fail when submitted to high charge-up surge currents, it is recommended to decouple them with 470 nF polyester or ceramic capacitors. RHFL7913A adjustable being manufactured with very high speed bipolar technology (6 GHz fT transistors), the PCB layout shall be performed with unprecedented care, very low inductance, low mutually coupling lines, otherwise high frequency parasitic signals may be picked-up by the Device resulting into system self-oscillation. In difficult high current circumstances (coming from PCB layout) a 470 nF polyester capacitor connected between VO and ADJ pin increases stability margins. Benefit is SVR performances extended to far higher frequencies. 10/19 Doc ID 12344 Rev 7 RHFL7913A 6.1 Application information Remote sensing operation When load is physically far away from device output, the adjustable line can be set as a kelvin sense line by implementing the divider resistor bridge as close as possible form device, with a decoupling capacitor. The adjust pin kelvin sense line (to be not coupled with power line) picks-up load voltage (load also locally decoupled with a capacitor). This layout eliminates ohmic drop in load power wire. Similarly, by taking advantage of two separate ground terminals: power ground pin shall be directly connected to load ground terminal which is also the system ground, device signal ground shall be separately connected to load ground terminal by another kelvin line: In this way, ground ohmic errors are minimized because the only current flowing into device signal ground pin kelvin line is device Iq (a matter of a few mA). Doc ID 12344 Rev 7 11/19 Die information 7 RHFL7913A Die information RHFL7913A adjustable is also available in die form. Space dice are electrically tested by STMicroelectronics in such a way that, when mounted in proper thermal and electrical substrate, they are in full compliance with equivalent packaged device: DIE physical dimensions. DIE size: 110 mils x 166 mils DIE thickness: 375 µm +/-25 µm (14.8 mils +/- 1 mil) Pad size: VI, VO pads: 245 µm x 544 µm Control pads: 184 µm x 184 µm Interface materials Top Metallization: Al/Si/Cu 1.05 µm +/- 0.15 µm Backside metallization: None Glassivation Type: P.Vapox + Nitride Thickness: 0.6 µm +/- 0.1µm + 0.6µm +/-0.08 µm Substrate: Silicon (connected to VI = Vminus) The SENSE pad is layout on the die but is not electrically connected to the IC and shall be left non-bonded during hybrid bonding. Figure 3. 12/19 DIE size Doc ID 12344 Rev 7 RHFL7913A 8 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Doc ID 12344 Rev 7 13/19 Package mechanical data RHFL7913A FLAT-16 (MIL-STD-1835) mechanical data mm. inch. Dim. Min. A Typ. 2.16 Max. Min. 2.72 0.085 Typ. 0.107 b 0.43 0.017 c 0.13 0.005 D 9.91 0.390 E 6.91 0.272 E2 4.32 0.170 E3 0.76 0.030 e 1.27 0.050 L 6.72 0.265 Q 0.66 S1 0.13 Max. 1.14 0.026 0.045 0.005 b e c L E3 9 16 E E2 1 8 E3 L S1 D 14/19 Doc ID 12344 Rev 7 Q A 7450901A RHFL7913A Package mechanical data SMD5C mechanical data Dim. mm. inch. Min. Typ. Max. Min. Typ. Max. A 2.84 3.00 3.15 0.112 0.118 0.124 A1 0.25 0.38 0.51 0.010 0.015 0.020 b 7.13 7.26 7.39 0.281 0.286 0.291 b1 4.95 5.08 5.21 0.195 0.200 0.205 b2 2.28 2.41 2.54 0.090 0.095 0.100 b3 2.92 3.05 3.18 0.115 0.120 0.125 D 13.71 13.84 13.97 0.540 0.545 0.550 D1 0.76 E 7.39 0.296 0.301 e 0.030 7.52 7.65 1.91 0.291 0.075 7924296B Doc ID 12344 Rev 7 15/19 Packaging 9 RHFL7913A Packaging RHFL7913A adjustable is available in high thermal dissipation 16 pin hermetic FLAT package, which bottom flange is metallized to allow direct soldering to heat sink (efficient thermal conductivity). It is also available in SMD5C hermetic ceramic package. 16/19 Doc ID 12344 Rev 7 RHFL7913A Order codes 10 Order codes Table 6. Order codes Terminal finish Quality level RHFL7913KPA1 GOLD EM1 RHFL7913KPA2 GOLD EM2 = EM1 + 48hours BI RHFL7913KPA-01V GOLD QML-V RHFL7913KPA-02V SOLDER QML-V RHFL7913SCA1 GOLD EM1 RHFL7913SCA2 GOLD EM2 = EM1 + 48hours BI RHFL7913SCA-03V GOLD Die FLAT-16 SMD5C L7913ADIE2S EM1 die L7913ADIE2V QML-V Note: EM1: Engineering parts, full temperature range, flight packages, no burn-in EM2: Same as above but with burn-in, used in Satellite EQMs Table 7. Table 8. Part number - SMD equivalent ST part number SMD part number RHFL7913KPA-01V 5962F0253201VXC RHFL7913KPA-02V 5962F0253201VXA RHFL7913SCA-03V 5962F0253202VYC L7913ADIE2V 5962F0253201V9A Environmental characteristics Parameter Conditions Value Unit Output voltage thermal drift -55 °C to +125 °C 40 ppm/°C Output voltage radiation drift From 0 kRad to 300 kRad at 0.55rd/sec 8 ppm/krad Output voltage radiation drift From 0 kRad to 300 kRad, MIL1019.5 6 ppm/krad Doc ID 12344 Rev 7 17/19 Revision history RHFL7913A 11 Revision history Table 9. Document revision history Date Revision 16-May-2006 1 First release. 22-Aug-2006 2 The pin description for SMD5C on table 1 updated. 19-Dec-2007 3 Modified: Table 6. 26-Aug-2008 4 Modified: Features on page 1, Table 1 on page 4, the VI value Table 4 on page 5, Table 5 on page 6 and Section 6 on page 10. 22-Sep-2008 5 Modified: Table 1 on page 4 for SMD5C. 07-Feb-2011 6 Added: note Table 1 on page 4. 07-Dec-2011 7 Removed the note under Table 1 on page 4 and added footnotes 1 and 2. 18/19 Changes Doc ID 12344 Rev 7 RHFL7913A Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY TWO AUTHORIZED ST REPRESENTATIVES, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com Doc ID 12344 Rev 7 19/19