RHFL7913KPA1 - STMicroelectronics, Inc.

December 2011 Doc ID 12344 Rev 7 1/19

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

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.

FLAT-16 SMD5C:

5-connection SMD

www.st.com

Contents RHFL7913A
2/19 Doc ID 12344 Rev 7
Contents
Diagram  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Device description   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1 ADJ pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
2 Inhibit ON-OFF control  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
3 Overtemperature protection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
4 Overcurrent protection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
5 OCM pin  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
6 Alternates to  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
Application information   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1 Remote sensing operation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
Die information   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Package mechanical data  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Order codes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

RHFL7913A Diagram

Doc ID 12344 Rev 7 3/19

1 Diagram

Figure 1. Block diagram

Pin configuration RHFL7913A

4/19 Doc ID 12344 Rev 7

2 Pin configuration

Figure 2. Pin configuration (top view for FLAT-16, bottom view for SMD5C)

FLAT-16 SMD5C

Table 1. Pin description

Pin n° FLAT-16 (1) SMD5C (2)

DSCC Part Ident. 5962-02532 5962-02532

I, Negative Input VO, Negative Output

I, Negative Input ADJ

I, Negative Input Inhibit

SC GND

5OCMV

I, Negative Input

PLUS, Positive Supply

7GND

8N.C.

9N.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.

RHFL7913A Maximum ratings

Doc ID 12344 Rev 7 5/19

3 Maximum ratings

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these conditions is not implied.

Table 2. Maximum operating ratings

Symbol Parameter Value Unit

VIDC input voltage |VIN – VPLUS| -12

VPLUS Logical block supply voltage V(+)-V(GND), unless grounded +5

VIDC voltage, VIN–GND, VPLUS= 0V -12

VIDC voltage, VIN–GND, VPLUS=+3V -9

VODC output voltage range -9 to -1.20

IOUT Output current RHFL7913KPA 2 A

RHFL7913SCA 3

PDTC = 25 °C power dissipation RHFL7913KPA 15 W

RHFL7913SCA 15

TSTG Storage temperature range -65 to +150 °C

TOP Operating junction temperature range -55 to +150

ESD Electrostatic discharge capability Class 3

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

Table 4. Recommended operating conditions

Symbol Parameter Value Unit

VIInput voltage range VI (at VPLUS= 0V) -12 to -1.3 V

VPLUS Positive supply range 0 to +3 V

VOOutput voltage range 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

TAAmbient operating temperature range -55 to +125 °C

Electrical characteristics RHFL7913A

6/19 Doc ID 12344 Rev 7

4 Electrical characteristics

TJ = 25 °C, VI = VO + 2.5 V, CI = CO = 1 µF, unless otherwise specified.

Table 5. Electrical characteristics

Symbol Parameter Test conditions Min. Typ. Max. Unit

VIOperating input voltage IO= 1A (KPA) or 2A (SCA) -12 V

Operating output

voltage

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

ΔVO/ΔVILine regulation

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

ΔVO/VOLoad regulation

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

Quiescent current

ON MODE

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

Quiescent current

OFF MODE

VO = -1.2V, VI = -7V, VPLUS = +5V,

VINH > 2.3V, TJ = -55°C to +125°C 1mA

RHFL7913A Electrical characteristics

Doc ID 12344 Rev 7 7/19

VDDropout voltage

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

IPLUS (1) VPLUS Current

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

SVR (1) Supply voltage

rejection

VI = VO – 2.5V, IO = 5mA, F = 120Hz 60 dB

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

µs

tPHL (1) Inhibit propagation

delay

VINH >2.3V, VPLUS = 5V, VI = VO -2.5V

IO = 400mA 100

VINH(ON) Inhibit voltage VI = -7V VPLUS= +5V IO = 5mA

TJ = -55°C to 125°C

0.8 V

VINH(OFF) 2.3

ISH Shutdown input current VINH=5V 15 µA

VOCM OCM pin voltage Sinked IOCM = 10mA, active low 0.38 V

en Output noise voltage f = 10Hz to 100kHz IO = 5mA to 2A 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.

Table 5. Electrical characteristics (continued)

Symbol Parameter Test conditions Min. Typ. Max. Unit

Device description RHFL7913A

8/19 Doc ID 12344 Rev 7

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 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.

RHFL7913A Device description

Doc ID 12344 Rev 7 9/19

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.

Application information RHFL7913A

10/19 Doc ID 12344 Rev 7

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 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 series-

inductance 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.

RHFL7913A Application information

Doc ID 12344 Rev 7 11/19

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).

Die information RHFL7913A

12/19 Doc ID 12344 Rev 7

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 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. DIE size

RHFL7913A Package mechanical data

Doc ID 12344 Rev 7 13/19

8 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.

Package mechanical data RHFL7913A

14/19 Doc ID 12344 Rev 7

Dim.

mm. inch.

Min. Typ. Max. Min. Typ. Max.

A 2.16 2.72 0.085 0.107

b0.430.017

c0.130.005

D9.910.390

E6.91 0.272

E2 4.32 0.170

E30.76 0.030

e 1.27 0.050

L 6.72 0.265

Q 0.66 1.14 0.026 0.045

S1 0.130.005

FLAT-16 (MIL-STD-1835) mechanical data

7450901A

S1Q

RHFL7913A Package mechanical data

Doc ID 12344 Rev 7 15/19

Dim. mm. inch.

Min. Typ. Max. Min. Typ. Max.

A2.843.00 3.15 0.112 0.1180.124

A1 0.25 0.38 0.51 0.010 0.015 0.020

b7.137.26 7.39 0.281 0.286 0.291

b1 4.95 5.085.21 0.195 0.200 0.205

b2 2.282.41 2.54 0.090 0.095 0.100

b3 2.923.05 3.180.115 0.120 0.125

D13.71 13.8413.97 0.540 0.545 0.550

D1 0.76 0.030

E7.39 7.52 7.65 0.291 0.296 0.301

e1.91 0.075

SMD5C mechanical data

7924296B

Packaging RHFL7913A

16/19 Doc ID 12344 Rev 7

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.

RHFL7913A Order codes

Doc ID 12344 Rev 7 17/19

10 Order codes

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 6. Order codes

Die FLAT-16 SMD5C 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

L7913ADIE2S EM1 die

L7913ADIE2V QML-V

Table 7. Part number - SMD equivalent

ST part number SMD part number

RHFL7913KPA-01V 5962F0253201VXC

RHFL7913KPA-02V 5962F0253201VXA

RHFL7913SCA-03V 5962F0253202VYC

L7913ADIE2V 5962F0253201V9A

Table 8. 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

Revision history RHFL7913A

18/19 Doc ID 12344 Rev 7

11 Revision history

Table 9. Document revision history

Date Revision Changes

16-May-2006 1 First release.

22-Aug-2006 2 The pin description for SMD5C on table 1 updated.

19-Dec-2007 3 Modified: Tabl e 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.

RHFL7913A

Doc ID 12344 Rev 7 19/19

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.

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