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RHFL4913XX15 - RHFL4913XX25 RHFL4913XX33 - RHFL4913XX50
Rad-hard positive fixed voltage regulator
Features

2 and 3 A low dropout voltage Embedded overtemperature, overcurrent protections Adjustable current limitation Output overload monitoring/signalling Fixed 1.5 V, 2.5 V; 3.3 V; 5.0 V output voltages Inhibit (ON/OFF) TTL-compatible control Programmable output short-circuit current Remote sensing operation Rad-hard: tested up to 300 krad Mil Std 883E Method 1019.6 and low dose rate conditions Heavy ion, SEL, and SEU immune; able to sustain 2x1014 protons/cm2 and 2x1014 neutrons/cm2
TO-257 Flat-16 SMD.5
Available into various hermetic ceramic packages, it is specifically intended for space and harsh radiation environments. Input supply range is up to 12 V. RHFL4913 fixed is QML-V qualified, DSCC SMD are 5962F02534 / 02535 / 02536.
Description
The RHFL4913 fixed is a high performance Radhard positive voltage regulator family. Figure 1.
Block diagram for package SMD.5 and TO-257
August 2008
Rev 8
1/19
www.st.com 19
Contents
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
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 5.7 Low pin count package limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 SENSE pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Inhibit ON-OFF control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 OCM pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Alternate to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1 Remote sensing operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7
Notes about Flat-16 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1 7.2 Radiation performances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Die information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 9 10
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
Diagram
1
Figure 2.
Diagram
Block diagram for package Flat-16
3/19
Pin configuration
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
2
Figure 3.
Pin configuration
Pin configuration (top view for Flat-16, bottom view for SMD.5)
Flat-16
SMD.5
TO-257
Table 1.
Pin description
Pin name VO VI GND ISC OCM INHIBIT SENSE NC Flat-16 1, 2, 6, 7 3, 4, 5 13 8 10 14 16 9, 11, 12, 15 SMD.5 1 2 3 TO-257 3 1 2
4/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
Maximum ratings
3
Table 2.
Symbol VI IO
Maximum ratings
Absolute maximum ratings (1)
Parameter DC input voltage, VI - VGROUND RHFL4913S, ESY Output current RHFL4913KP KP, S Versions PD TSTG TOP TJ ESD TC = 25C power dissipation Storage temperature range Operating junction temperature range Junction temperature
(2)
Value 14 3
Unit V A
2 15 W 10 -65 to +150 -55 to +150 +150 Class 3 C C C
ESY Version
Electrostatic discharge capability
1. Exceeding maximum ratings may damage the device. 2. Internally limited to about maximum +175 C by thermal shutdown circuit.
Table 3.
Symbol RthJC TSOLD
Thermal data
Parameter Thermal resistance junction-case max. Maximum soldering temperature, 10 sec. Flat-16 8.3 TO-257 12.5 300 SMD.5 8.3 Unit C/W C
5/19
Electrical characteristics
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
4
Table 4.
Symbol VI VO ISHORT VO VO VO VO VO/VI
Electrical characteristics
Electrical characteristics (TJ = 25 C, VI = VO+2.5 V, CI = CO = 1 F, unless otherwise specified)
Parameter Operating input voltage Test conditions IO = 2 A (Flat-16) or 3A (SMD.5 & TO-257) -2 4.5 1.47 2.45 3.23 4.9 1.53 2.55 3.37 5.1 0.3 0.4 0.4 0.2 0.3 0.3 0.3 0.4 0.4 100 8 25 60 150 1 40 mA 100 mA Min. Typ. Max. 12 2 Unit V % A V V V V % % % % % % % % % m
Output voltage accuracy VI = VO+2.5V, IO = 5mA Output current limit
(1)
Adjustable by mask/external resistor
Operating output voltage IO = 2 A, 1.5 V output voltage Operating output voltage IO = 2 A, 2.5 V output voltage Operating output voltage IO = 2 A, 3.3 V output voltage Operating output voltage IO = 2 A, 5.0 V output voltage VI = VO+2.5V to 12 V, IO = 5mA (+25C) Line regulation VI = VO+2.5V to 12 V, IO = 5mA (-55C) VI = VO+2.5V to 12 V, IO = 5mA (+125C) VI = VO+2.5V, IO = 5mA to 400 mA (+25C) VI = VO+2.5V, IO = 5mA to 400 mA (-55C)
VO/VO Load regulation
VI = VO+2.5V, IO = 5mA to 400 mA (+125C) VI = VO+2.5V, IO = 5mA to 1A (+25C) VI = VO+2.5V, IO = 5mA to 1A (-55C) VI = VO+2.5V, IO = 5mA to 1A (+125C)
ZOUT
Output impedance
IO = 100 mA DC and 20 mA rms VI = VO+2.5V, IO = 30mA, on mode VI = VO+2.5V, IO = 300mA, on mode VI = VO+2.5V, IO = 1A, on mode VI = VO+2.5V, IO = 3A, on mode (only for SMD.5 and TO-257) VI = VO+2V, VINH = 2.4V, off mode
Iq
Quiescent current
Iq
Quiescent current
VI =VO+2.5V, IO=1A, TJ=+125C, on mode VI =VO+2.5V, IO=1A, TJ=-55C, on mode
6/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50 Table 4.
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, TJ = -55C IO = 400mA, TJ = +25C IO = 400mA, TJ = +125C Min. Typ. 300 350 450 Max. 400 450 550 550 mV 650 800 750 950 0.8 2.4 f = 120Hz f = 33kHz 60 30 70 dB 40 15 0.38 on-off VI = VO+2.5V, VINH = 2.4 V, IO = 400 mA B= 10Hz to 100kHz, IO = 5mA to 2A off-on 40 20 100 A V s s Vrms V V Unit
Vd
Dropout voltage
IO = 1A, TJ = -55C IO = 1A, TJ = +25C IO = 1A, TJ = +125C IO = 2A, TJ = +25C IO = 2A, TJ = +125C
VINH(ON) Inhibit voltage VINH(OFF) Inhibit voltage SVR ISH VOCM tPLH tPHL eN Supply voltage rejection
(1)
IO = 5mA, TJ= -55 to 125C IO = 5mA, TJ= -55 to 125C VI = VO+2.5V 1V, IO = 5mA VINH = 5 V Sinked IOCM = 24 mA active low
Shutdown input current OCM pin voltage Inhibit propagation delay
(1) (1)
Output noise voltage
1. This value is guaranteed by design. For each application it's strongly recommended to comply with the maximum current limit of the package used.
Figure 4.
Application diagram for remote sensing operation
7/19
Device description
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
5
Device description
The RHFL4913 fixed voltage contains a PNP type power element controlled by a signal resulting from amplified comparison between the internal temperature compensated bandgap cell and the fraction of the desired output voltage value. This fractional value is obtained from an internal-to-die resistor divider bridge set by STMicroelectronics. The device is protected by several functional blocks.
5.1
Low pin count package limitations
Some functions (INHIBIT, OCM, SENSE) are not available due to lack of pins. Corresponding die pads are by default connected inside silicon.
5.2
SENSE pin
The load voltage is applied by a Kelvin line connected to SENSE pin: Voltage feed-back comes from the internal divider resistor bridge. Therefore possible output voltages are set by manufacturer mask metal options. SENSE pin is not available in 3pin packages.
5.3
Inhibit ON-OFF control
By setting INHIBIT pin TTL-high, the device switches off the output current and voltage. The device is ON when INHIBIT pin is set low. Since INHIBIT pin is internally pulled down, it can be left floating in case inhibit function is not utilized. INHIBIT pin is not available in 3pin packages.
5.4
Overtemperature protection
A temperature detector internally monitors the power element junction temperature. The device goes OFF at approx. 175 C, returning to ON mode when back to approx. 40 C. It is worth noting that when the internal temperature detector reaches 175 C, the active power element can be at 225 C: device reliability cannot be granted in case of extensive operation under these conditions.
5.5
Overcurrent protection
ISC pin. An internal non-fold back short-circuit limitation is set with ISHORT > 3.8 A (VO is 0 V). This value can be reduced by an external resistor connected between ISC pin and VI pin, with a typical value range of 10 k to 200 k. This adjustment feature is not available in 3 pin packages. 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 limiter overrules regulation and VO starts to drop and the OCM flag is risen. When no current limitation adjustment is required, ISC pin must be left unbiased (as it is in 3 pin packages).
8/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
Device description
5.6
OCM pin
Goes low when current limiter starts to be active, otherwise VOCM = VI. It is bufferized and can sink 10 mA. OCM pin is internally pulled-up by a 5 k resistor. Not available in 3 pin packages.
5.7
Alternate to
RHFL4913 fixed (& custom) voltages replace all 3-terminal industry devices, providing essential benefits - Lower drop-out - High radiation performance - Better SVR - Saving the high stability external setting resistors.
9/19
Application information
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
6
Application information
The RHFL4913 fixed voltage is functional as soon as VI-VO voltage difference is slightly above the power element saturation voltage. A minimum 0.5 mA IO ensures perfect "noload" regulation. All available VI pins must always be externally interconnected, same thing for all available VO pins, otherwise device stability and reliability cannot be granted. All NC pins can be connected to ground. The INHIBIT function switches off the output current in an electronic way, that is very quickly. According to Lenz's Law, external circuitry reacts with -LdI/dt terms which can be of high amplitude in case some series-inductance exists. The effect would be a large transient voltage developed on both device terminals. It is necessary to protect the device with Schottky diodes preventing negative voltage excursions. In the worst case, a 14 V Zener diode shall protect the device input. The device has been designed for high stability and low drop out operation: minimum 1 F input and output tantalum capacitors are therefore mandatory. Capacitor ESR range is from 0.5 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 must be considered relatively to capacitors. They must be connected as close as possible to 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 capacitors. Being RHFL4913 fixed voltage manufactured with very high speed bipolar technology 6 GHz fT transistors), the PCB lay-out must be performed with extreme care, very low inductance, low mutually coupling lines, otherwise high frequency parasitic signals may be picked-up by the device resulting into self-oscillation. User's benefit is a SVR performance extended to far higher frequencies.
6.1
Remote sensing operation
In case the load is located far from the regulator, it is recommended to comply with the scheme below. To obtain the best regulation, it is in addition essential to care about: - The wire connecting R2 to the load end must not be crossed by the load current (Kelvin sense). The noise captured by the wires between the load and the chip could bring a noisy output voltage. In case this happens, it is recommended that shielded cables are used for these connections. The external wrap must be used for connecting the ground of the chip with the load ground. It is also recommended to place 1 F tantalum capacitors between output and ground close to the device and another next to the load.
10/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
Notes about Flat-16 package
7
Notes about Flat-16 package
The bottom of package is metallized to allow user to directly solder the voltage regulator to the equipment heater, in order to optimize heat removal performance.
7.1
Radiation performances
The RHFL4913F has been tested against: 300krad TID ELDERS in accordance with Mil1019.6, bipolar section: post radiation parameters are within datasheet pre-rad limits. Submitted to 200MeV Iodine ions of 60.4MeV/cm2/mg LET up to 1exp(+7) ions / cm2, no SEL event has been detected.
7.2
Die information
RHFL4913 fixed 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 provide full compliance with equivalent packaged product. - Max die dimensions: 2.794 mm by 3.861 mm or 110 mils by 152 mils - Die thickness: 357 m +/- 50 m - Pad size: 184 m by 184 m - Metallization: Aluminum 4% silicon alloy - Die backside: Bare silicon - Die backside potential: Ground
Figure 5.
Die size
(*) Die SENSE pad is active in RHFL4913 fixed die. It shall not be left unbonded. It should be bonded to VO pin. (**) Die adjust pad is available in the die lay-out but is not electrically connected to the IC. It shall be left unconnected during hybrid bonding.
11/19
Package mechanical data
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
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.
12/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
Package mechanical data
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
13/19
Package mechanical data
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
SMD.5 mechanical data
Dim. A A1 b b1 b2 b3 D D1 E e mm. Min. 2.84 0.25 7.13 5.58 2.28 2.92 10.03 0.76 7.39 7.52 1.91 7.64 Typ. 3.00 0.38 7.26 5.72 2.41 3.05 10.16 Max. 3.15 0.51 7.39 5.84 2.54 3.18 10.28 Min. 0.112 0.010 0.281 0.220 0.090 0.115 0.395 0.030 0.291 0.296 0.075 0.301 inch. Typ. 0.118 0.015 0.286 0.225 0.095 0.120 0.400 Max. 0.124 0.020 0.291 0.230 0.100 0.125 0.405
7386434B
14/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
Package mechanical data
TO-257 mechanical data
Dim. A B C D E F G H I J K L M N R 1.65 15.2 2.29 0.71 0.065 3.56 4.7 1.02 3.68 13.51 5.26 0.76 3.05 2.54 16.5 0.598 0.090 0.028 3.81 0.140 mm. Min. Typ. 10.54 10.54 16.64 5.33 0.185 0.40 0.145 0.532 0.207 0.030 0.120 0.100 0.650 0.150 Max. Min. inch. Typ. 0.415 0.415 0.655 0.210 Max.
0117268C
15/19
Ordering information
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
9
Table 5.
DIE
Ordering information
Order codes
Flat-16
RHFL4913KP15-01V RHFL4913KP15-02V RHFL4913KP151 RHFL4913KP152
SMD.5
RHFL4913S15-03V RHFL4913S15-04V RHFL4913S151 RHFL4913S152
TO-257
RHFL4913ESY1505V RHFL4913ESY1506V RHFL4913ESY151 RHFL4913ESY152
Terminal finish
GOLD SOLDER GOLD GOLD NA NA
Out. volt.
1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 2.5 V 2.5 V 2.5 V 2.5 V 2.5 V 2.5 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 5.0 V 5.0 V 5.0 V 5.0 V 5.0 V 5.0 V
Q.ty level
EM1 EM1=EM2 +48h B.I.
L491315DIE2V L491315DIE2S RHFL4913KP25-01V RHFL4913KP25-02V RHFL4913KP251 RHFL4913KP252 L491325DIE2V L491325DIE2S RHFL4913KP33-01V RHFL4913KP33-02V RHFL4913KP331 RHFL4913KP332 L491333DIE2V L491333DIE2S RHFL4913KP50-01V RHFL4913KP50-02V RHFL4913KP501 RHFL4913KP502 L491350DIE2V L491350DIE2S RHFL4913S50-03V RHFL4913S50-04V RHFL4913S501 RHFL4913S502 RHFL4913ESY5005V RHFL4913ESY5006V RHFL4913ESY501 RHFL4913ESY502 RHFL4913S33-03V RHFL4913S33-04V RHFL4913S331 RHFL4913S332 RHFL4913ESY3305V RHFL4913ESY3306V RHFL4913ESY331 RHFL4913ESY332 RHFL4913S25-03V RHFL4913S25-04V RHFL4913S251 RHFL4913S252 RHFL4913ESY2505V RHFL4913ESY2506V RHFL4913ESY251 RHFL4913ESY252
EM1 QML-V QML-V EM1 EM1=EM2 +48h B.I. QML-V EM1 QML-V QML-V EM1 EM1=EM2 +48h B.I. QML-V EM1 QML-V QML-V EM1 EM1=EM2 +48h B.I. QML-V EM1
GOLD SOLDER GOLD GOLD NA NA GOLD SOLDER GOLD GOLD NA NA GOLD SOLDER GOLD GOLD NA NA
16/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50 Table 6. Part number - SMD equivalent
ST part number
RHFL4913KP15-02V RHFL4913KP25-01V RHFL4913KP25-02V RHFL4913KP33-01V RHFL4913KP33-02V RHFL4913KP50-01V RHFL4913KP50-02V RHFL4913S25-03V RHFL4913S25-04V RHFL4913S33-03V RHFL4913S33-04V
Ordering information
SMD part number
5962F0253401VXC 5962F0253401VXA 5962F0253501VXC 5962F0253501VXA 5962F0253601VXC 5962F0253601VXA 5962F0253402VYC 5962F0253402VYA 5962F0253502VYC 5962F0253502VYA
RHFL4913S50-03V RHFL4913S50-04V RHFL4913ESY2505V RHFL4913ESY2506V RHFL4913ESY3305V RHFL4913ESY3306V RHFL4913ESY5005V RHFL4913ESY5006V L491325DIE2V L491333DIE2V L491350DIE2V
5962F0253602VYC 5962F0253602VYA 5962F0253402VZC 5962F0253402VZA 5962F0253502VZC 5962F0253502VZA 5962F0253602VZC 5962F0253602VZA 5962F0253402V9A 5962F0253502V9A 5962F0253602V9A
Note:
3 V version is available on request.
Table 7.
Environmental characteristics
Parameter Conditions -55C to +125C From 0 krad to 300 krad at 0.55 rad/s From 0 krad to 300 krad, Mil Std 883E Method 1019.6 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
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
10
Table 8.
Date
Revision history
Document revision history
Revision 4 5 6 7 8 Changes Mistake in pin description SMD.5 on table 3. New order codes added - tables 4 and 5. The features, tables 4, 5 and the figures 1, 2 updated. Modified: PD on table 1, the RthJC for TO-257 on table 2 and the tables 6 and 7, added DIE information. Added new output 1.5 V, modified: Table 4 on page 6, Table 5 on page 16 and Table 6 on page 17.
05-May-2004 28-Oct-2004 27-May-2005 08-Jun-2005 26-Aug-2008
18/19
RHFL4913XX15 - RHFLXX25 - RHFLXX33 - RHFLXX50
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19/19

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