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
RHFL7913A
FLAT-16
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.
SMD5C:
5-connection SMD
December 2011 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
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
6 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)
Table 1. Pin description
Pin n° FLAT-16
DSCC Part Ident. 5962-02532 5962-02532
1V
2V
3V
4I
5OCMV
6V
7GND
8N.C.
9N.C.
10 GND
11 Inhibit
12 ADJ
FLAT-16
SMD5C
(1)
, Negative Input VO, Negative Output
I
, Negative Input ADJ
I
, Negative Input Inhibit
I
SC
, Positive Supply
PLUS
SMD5C
GND
, Negative Input
I
(2)
13 N.C.
14 V
15 V
16 V
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.
, Negative Output
O
, Negative Output
O
, Negative Output
O
4/19 Doc ID 12344 Rev 7
RHFL7913A Maximum ratings
3 Maximum ratings
Table 2. Maximum operating ratings
Symbol Parameter Value Unit
V
V
PLUS
V
V
V
DC input voltage |VIN – V
I
| -12
PLUS
Logical block supply voltage V(+)-V(GND), unless grounded +5
DC voltage, V
I
DC voltage, V
I
DC output voltage range -9 to -1.20
O
IN–
IN–
GND, V
GND, V
= 0V -12
PLUS
=+3V -9
PLUS
V
RHFL7913KPA 2
I
OUT
Output current
RHFL7913SCA 3
A
RHFL7913KPA 15
T
P
T
STG
OP
TC = 25 °C power dissipation
D
RHFL7913SCA 15
Storage temperature range -65 to +150
Operating junction temperature range -55 to +150
W
°C
ESD Electrostatic discharge capability 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
R
T
thJC
SOLD
Thermal resistance junction-case, FLAT-16 and SMD5C 8.3 °C/W
Maximum soldering temperature, 10 sec. 300 °C
Table 4. Recommended operating conditions
Symbol Parameter Value Unit
V
V
I
PLUS
V
O
T
A
Input voltage range VI (at V
= 0V) -12 to -1.3 V
PLUS
Positive supply range 0 to +3 V
V
=0V, VI= -12 to -3.7V -9.5 to -1.2 V
Output voltage range
PLUS
V
=+3V, VI= -9 to -3.7V -6.5 to -1.2 V
PLUS
Ambient operating temperature range -55 to +125 °C
Doc ID 12344 Rev 7 5/19
Electrical characteristics RHFL7913A
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
V
Operating input voltage IO= 1A (KPA) or 2A (SCA) -12 V
I
IO= 1A, VO = -1.2V, FLAT 16 -1.28 -1.16
I
= 1A, VO = -9V, FLAT 16 -9.6 -8.7
V
Operating output
O
voltage
ΔVO/ΔVILine regulation
ΔV
Load regulation
O/VO
Quiescent current
I
Q
ON MODE
O
I
= 2A, VO = -1.2V, SMD5C -1.28 -1.16
O
= 2A, VO = -9V, SMD5C -9.6 -8.7
I
O
= VO - 2.5V to -12V, IO = 5mA,
V
I
= 25°C
T
J
= VO - 2.5V to -12V, IO = 5mA,
V
I
= -55°C and +125°C
T
J
V
= VO - 2.5V, IO = 5mA to 400mA,
I
TJ = 25°C
V
= VO - 2.5V, IO = 5mA to 400mA
I
TJ = -55°C and +125°C
= VO - 2.5V, IO =-5mA to 1A, TJ = 25°C 0.5
V
I
V
= VO - 2.5V, IO = 5mA to 1A,
I
TJ = -55°C and +125°C
I
= 5mA, VI = VO -2.5V, TJ = 25°C -3
O
I
=-30mA, VI = VO -2.5V, TJ = 25°C -6
O
= 300mA VI = VO -2.5V,
I
O
= 25°C and +125°C
T
J
I
= 300mA VI = VO -2.5V, TJ = -55°C -20
O
= 1A VI = VO -2.5V,
I
O
= 25°C and +125°C
T
J
I
= 1A VI = VO -2.5V, TJ = -55°C -50
O
= 3A VI = VO -2.5V, V
I
O
INH
= 0,
TJ = +25°C and +125°C Only for SMD5C
-15
-30
-90
V
0.2
0.5
0.4
%
0.5
0.6
mA
I
= 2A VI = VO -2.5V, V
O
INH
= 0,
TJ = -55°C Only for SMD5C,
Quiescent current
I
Q
OFF MODE
VO = -1.2V, VI = -7V, V
> 2.3V, TJ = -55°C to +125°C
V
INH
PLUS
= +5V,
6/19 Doc ID 12344 Rev 7
TBD
1mA
RHFL7913A Electrical characteristics
Table 5. Electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
IO = 400mA VO =-2.5V to -9V, TJ = 25°C -450
I
= 400mA VO =-2.5V to -9V,
O
TJ = -55°C and +125°C
V
Dropout voltage
D
= 1A VO =-2.5V to -9V, TJ = 25°C -750
I
O
I
= 1A VO =-2.5V to -9V,
O
TJ = -55°C and +125°C
V
I
PLUS
= -5.5V, V
I
= 25°C
T
(1)
V
Current
PLUS
J
= -5.5V, V
V
I
PLUS
PLUS
= 5V, V
= +5V, V
INH
INH
= 5V,
= 5V
TJ = -55°C and +125°C
= VO – 2.5V, IO = 5mA, F = 120Hz 60
V
SVR
t
PLH
t
PHL
V
INH(ON)
V
INH(OFF)
I
V
OCM
rejection
Inhibit propagation
(1)
delay
Inhibit propagation
(1)
delay
Inhibit voltage
Shutdown input current V
SH
OCM pin voltage Sinked I
Supply voltage
(1)
en Output noise voltage f = 10Hz to 100kHz I
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.
I
= VO – 2.5V, IO= 5mA, F = 33kHz 20
V
I
V
< 0.8V, V
INH
= 5V, VI = VO -2.5V
PLUS
IO = 400mA
V
INH
= 400mA
I
O
= -7V V
V
I
>2.3V, V
PLUS
= 5V, VI = VO -2.5V
PLUS
= +5V IO = 5mA
TJ = -55°C to 125°C
=5V 15 µA
INH
= 10mA, active low 0.38 V
OCM
= 5mA to 2A 40 µVrms
O
-500
mV
-800
0.75
mA
1
dB
20
µs
100
0.8
V
2.3
Doc ID 12344 Rev 7 7/19
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
I
pin. An internal non-fold back short-circuit limitation is set with I
SC
This value can be downward modified by an external resistor connected between I
pins, with a typical value range of 10 kΩ to 200 kΩ. To keep excellent V
necessary to set I
I
reaches I
O
and OCM flag is risen. When no current limitation adjustment is required, I
unbiased (as it is in 3 pin packages).
SHORT
1.6 times greater than the maximum desired application IO. When
SHORT
– 300 mA, the current limitor overrules regulation and VO starts to drop
5.5 OCM pin
> 4 A (VO is 0 V).
SHORT
regulation, it is
O
pin shall be left
SC
and VI
SC
Goes low when current limitor starts to be active, otherwise V
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
= V (+). It is bufferized
OCM
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.
Doc ID 12344 Rev 7 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:
V
= V
O
To access all RHFL7913A adjustable functionality, V (+) shall be set at 3.0 V (max 5 V). As a
consequence, V
operation rating.
(1 + R1/R2) with V
ADJ
(-) cannot be greater than –9.0 V (resp. –7 V) due to –12 V maximum
I
ADJ
= -1.20 V
The device is functional as soon as V
- VO voltage difference is slightly above power
I
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 I
is necessary to
O
set to ensure perfect “no-load” regulation. It can be wise to dissipate this current into the
divider bridge resistor.
All available V
pins shall always be PCB interconnected, the same for all available VO pins,
I
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 V
and VO may prevent voltage excursions
I
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 V
be greater than V
during transient operation.
I
to
O
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
f
transistors), the PCB layout shall be performed with unprecedented care, very low
T
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
V
and ADJ pin increases stability margins. Benefit is SVR performances extended to far
O
higher frequencies.
10/19 Doc ID 12344 Rev 7
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).
Doc ID 12344 Rev 7 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 µm +/-25 µm (14.8 mils +/- 1 mil)
Pad size:
V
, VO pads: 245 µm x 544 µm
I
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 V
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.
= V
I
minus
)
Figure 3. DIE size
12/19 Doc ID 12344 Rev 7
RHFL7913A Package mechanical data
8 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. 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. Typ. Max. Min. Typ. Max.
A 2.16 2.72 0.085 0.107
b 0.43 0.017
c0.13 0.005
D 9.910.390
E6.91 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 1.14 0.026 0.045
S1 0.13 0.005
e
L
16
E
1 8
L
b
9
c
E3
E2
E3
S1
D
14/19 Doc ID 12344 Rev 7
Q
A
7450901A
RHFL7913A Package mechanical data
SMD5C mechanical data
Dim.
A2.84 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
b14.95 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
D13 .71 13.8413.97 0.540 0.545 0.550
D1 0.76 0.030
E7.39 7.52 7.65 0.291 0.2960.301
e1.91 0.075
Min. Typ. Max. Min. Typ. Max.
mm. inch.
7924296B
Doc ID 12344 Rev 7 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 Doc ID 12344 Rev 7
RHFL7913A Order codes
10 Order codes
Table 6. Order codes
Die FLAT-16 SMD5C
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
Terminal
finish
Quality level
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 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
Doc ID 12344 Rev 7 17/19
Revision history RHFL7913A
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: Ta bl e 6 .
26-Aug-2008 4
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.
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.
18/19 Doc ID 12344 Rev 7
RHFL7913A
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Doc ID 12344 Rev 7 19/19
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