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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/cm/mg LET ions; able to Sustains 2x1014 protons/cm2
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.
August 2008
Rev 4
1/19
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Contents
RHFL7913A
Contents
1 2 3 4 5 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1 5.2 5.3 5.4 5.5 5.6 ADJ pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Inhibit ON-OFF control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 OCM pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Alternates to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1 Remote sensing operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 8 9 10 11
Die information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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RHFL7913A
Diagram
1
Figure 1.
Diagram
Block diagram
3/19
Pin configuration
RHFL7913A
2
Figure 2.
Pin configuration
Pin configuration (top view for FLAT-16, bottom view for SMD5C)
FLAT-16
SMD5C
Table 1.
Pin description
Pin n DSCC Part Ident. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 FLAT-16 5962-02532 VI, Negative Input VI, Negative Input VI, Negative Input ISC OCM VPLUS, Positive Supply GND N.C. N.C. GND Inhibit ADJ N.C. VO, Negative Output VO, Negative Output VO, Negative Output SMD5C 5962-02532 VI, Negative Input VI, Negative Output ADJ Inhibit GND
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RHFL7913A
Maximum ratings
3
Table 2.
Symbol VI VPLUS VI VI VO IOUT
Maximum ratings
Maximum operating ratings (1)
Parameter DC input voltage |VIN - VPLUS| Logical block supply voltage V(+)-V(GND), unless grounded DC voltage, VIN-GND, VPLUS= 0V DC voltage, VIN-GND, VPLUS=+3V DC output voltage range RHFL7913KPA Output current RHFL7913SCA RHFL7913KPA TC = 25 C power dissipation RHFL7913SCA Storage temperature range Operating junction temperature range Electrostatic discharge capability 15 -65 to +150 C -55 to +150 Class 3 3 15 W Value -12 +5 -12 -9 -9 to -1.20 2 A V Unit
PD TSTG TOP ESD
1. Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied.
Table 3.
Symbol RthJC TSOLD
Thermal data
Parameter Thermal resistance junction-case, FLAT-16 and SMD5C Maximum soldering temperature, 10 sec. Value 8.3 300 Unit C/W C
Table 4.
Symbol VI VPLUS VO TA
Recommended operating conditions
Parameter Input voltage range VI (at VPLUS= 0V) Positive supply range Output voltage range VPLUS=0V, VI= -12 to -3.7V VPLUS=+3V, VI= -9 to -3.7V Ambient operating temperature range Value -12 to -1.3 0 to +3 -9.5 to -1.2 -6.5 to -1.2 -55 to +125 Unit V V V V C
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Electrical characteristics
RHFL7913A
4
Table 5.
Symbol VI
Electrical characteristics
Electrical characteristics (TJ = 25 C, VI = VO+2.5 V, CI = CO = 1 F, unless otherwise specified)
Parameter Test conditions Min. -12 -1.28 -9.6 -1.28 -9.6 -1.16 -8.7 V -1.16 -8.7 0.2 Typ. Max. Unit V
Operating input voltage IO= 1A (KPA) or 2A (SCA) IO= 1A, VO = -1.2V, FLAT 16
VO
Operating output voltage
IO= 1A, VO = -9V, FLAT 16 IO= 2A, VO = -1.2V, SMD5C IO= 2A, VO = -9V, SMD5C VI = VO - 2.5V to -12V, IO = 5mA, TJ = 25C VI = VO - 2.5V to -12V, IO = 5mA, TJ = -55C and +125C VI = VO - 2.5V, IO = 5mA to 400mA, TJ = 25C
VO/VI Line regulation
0.5
0.4 % 0.5 0.5 0.6 -3 -6 -15 -20 -30 -50 -90 mA
VO/VO
Load regulation
VI = VO - 2.5V, IO = 5mA to 400mA TJ = -55C and +125C VI = VO - 2.5V, IO =-5mA to 1A, TJ = 25C VI = VO - 2.5V, IO = 5mA to 1A, TJ = -55C and +125C IO = 5mA, VI = VO -2.5V, TJ = 25C IO =-30mA, VI = VO -2.5V, TJ = 25C IO = 300mA VI = VO -2.5V, TJ = 25C and +125C IO = 300mA VI = VO -2.5V, TJ = -55C
IQ
Quiescent current ON MODE
IO = 1A VI = VO -2.5V, TJ = 25C and +125C IO = 1A VI = VO -2.5V, TJ = -55C IO = 3A VI = VO -2.5V, VINH= 0, TJ = +25C and +125C Only for SMD5C IO = 2A VI = VO -2.5V, VINH= 0, TJ = -55C Only for SMD5C,
TBD
IQ
Quiescent current OFF MODE
VO = -1.2V, VI = -7V, VPLUS = +5V, VINH > 2.3V, TJ = -55C to +125C
1
mA
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RHFL7913A Table 5.
Symbol
Electrical characteristics Electrical characteristics (continued) (TJ = 25 C, VI = VO+2.5 V, CI = CO = 1 F, unless otherwise specified)
Parameter Test conditions IO = 400mA VO =-2.5V to -9V, TJ = 25C IO = 400mA VO =-2.5V to -9V, TJ = -55C and +125C IO = 1A VO =-2.5V to -9V, TJ = 25C IO = 1A VO =-2.5V to -9V, TJ = -55C and +125C VI = -5.5V, VPLUS = 5V, VINH = 5V, TJ = 25C VI= -5.5V, VPLUS = +5V, VINH = 5V TJ = -55C and +125C VI = VO - 2.5V, IO = 5mA, F = 120Hz VI = VO - 2.5V, IO= 5mA, F = 33kHz VINH < 0.8V, VPLUS = 5V, VI = VO -2.5V IO = 400mA VINH >2.3V, VPLUS = 5V, VI = VO -2.5V IO = 400mA VI = -7V VPLUS= +5V IO = 5mA TJ = -55C to 125C 60 dB 20 20 s 100 0.8 V 2.3 15 0.38 40 A V Vrms Min. -450 -500 mV -750 -800 Typ. Max. Unit
VD
Dropout voltage
0.75 mA 1
IPLUS
(1)
VPLUS Current
SVR (1)
Supply voltage rejection Inhibit propagation delay Inhibit propagation delay Inhibit voltage
tPLH (1) tPHL
(1)
VINH(ON) VINH(OFF) ISH VOCM en
Shutdown input current VINH=5V OCM pin voltage Output noise voltage Sinked IOCM = 10mA, active low f = 10Hz to 100kHz IO = 5mA to 2A
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.
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Device description
RHFL7913A
5
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 k to 200 k. 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 k resistor. Can left open when V (+) = 0.
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RHFL7913A
Device description
5.6
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.
9/19
Application information
RHFL7913A
6
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 k 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 F input and output tantalum capacitors are therefore mandatory. Typical industry PCB design practices 10 F capacitors values are acceptable. Capacitor ESR range is from 0.020 to over 20 . 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
RHFL7913A
Application information
6.1
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).
11/19
Die information
RHFL7913A
7
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 m +/-25 m (14.8 mils +/- 1 mil) Pad size: VI, VO pads: 245 m x 544 m Control pads: 184 m x 184 m Interface materials Top Metallization: Al/Si/Cu 1.05 m +/- 0.15 m Backside metallization: None Glassivation Type: P.Vapox + Nitride Thickness: 0.6 m +/- 0.1m + 0.6m +/-0.08 m 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.
DIE size
12/19
RHFL7913A
Package mechanical data
8
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
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Package mechanical data
RHFL7913A
FLAT-16 (MIL-STD-1835) mechanical data
mm. Dim. Min. A b c D E E2 E3 e L Q S1 0.66 0.13 0.76 1.27 6.72 1.14 0.026 0.005 2.16 0.43 0.13 9.91 6.91 4.32 0.030 0.050 0.265 0.045 Typ. Max. 2.72 Min. 0.085 0.017 0.005 0.390 0.272 0.170 Typ. Max. 0.107 inch.
e
b
c
L
E3
16 9
E
E2
1
8
E3
L
S1 D
Q A
7450901A
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RHFL7913A
Package mechanical data
SMD5C mechanical data
Dim. A A1 b b1 b2 b3 D D1 E e mm. Min. 2.84 0.25 7.13 4.95 2.28 2.92 13.71 0.76 7.39 7.52 1.91 7.65 Typ. 3.00 0.38 7.26 5.08 2.41 3.05 13.84 Max. 3.15 0.51 7.39 5.21 2.54 3.18 13.97 Min. 0.112 0.010 0.281 0.195 0.090 0.115 0.540 0.030 0.291 0.296 0.075 0.301 inch. Typ. 0.118 0.015 0.286 0.200 0.095 0.120 0.545 Max. 0.124 0.020 0.291 0.205 0.100 0.125 0.550
7924296B
15/19
Packaging
RHFL7913A
9
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
RHFL7913A
Order codes
10
Table 6.
Die
Order codes
Order codes
FLAT-16 RHFL7913KPA1 RHFL7913KPA2 RHFL7913KPA-01V RHFL7913KPA-02V RHFL7913SCA1 RHFL7913SCA2 RHFL7913SCA-03V SMD5C Terminal finish GOLD GOLD GOLD SOLDER GOLD GOLD GOLD EM1 die QML-V EM1 EM2= EM1 + 48hours BI QML-V QML-V EM1 EM2= EM1 + 48hours BI Quality level
L7913ADIE2S L7913ADIE2V
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.
Part number - SMD equivalent
ST part number RHFL7913KPA-01V RHFL7913KPA-02V RHFL7913SCA-03V L7913ADIE2V SMD part number 5962F0253201VXC 5962F0253201VXA 5962F0253202VYC 5962F0253201V9A
Table 8.
Environmental characteristics
Parameter Conditions -55 C to +125 C From 0 kRad to 300k Rad at 0.55rd/sec From 0 kRad to 300 kRad, MIL1019.5 Value 40 8 6 Unit ppm/C ppm/krad ppm/krad
Output voltage thermal drift Output voltage radiation drift Output voltage radiation drift
17/19
Revision history
RHFL7913A
11
Table 9.
Date
Revision history
Document revision history
Revision 1 2 3 4 First release. The pin description for SMD5C on table 1 updated. Modified: Table 6. 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. Changes
16-May-2006 22-Aug-2006 19-Dec-2007 26-Aug-2008
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RHFL7913A
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