M IL-PR F - 3 8 5 3 4 C E R T I F IE D
M .S.KEN NED Y C ORP.
NEG A TIV E, 3 A MP,
LO W DROPO U T
V OLT A G E RE G UL A T OR
4 7 0 7 D e y Road Liv erpool, N. Y . 1 3 0 8 8
5332
SERIES
(3 1 5) 7 0 1-6 7 5 1
FE A T URES:
-5 V , -5.2 V , -1 0 V , -1 2 V and -1 5 V Standard V ersions
Lo w Dropout Voltage
O utput C urrent to 3 A mps
Output V oltage Internally Set to ± 1 % M A X .
Internal Short Circuit C urrent Limit
Internal Thermal O verload Protection
Lead Form Options: Straight, Up, Do w n and Gull Wing
A lternate Output V oltages A vailable
A vailable w ith Top T ab or T abless Package
Contact MSK for MIL-PRF-3 8 5 3 4 Q ualification Status
T OP T A B
NO TAB
DES CRIPTIO N:
The M SK 5 3 3 2 is a fix ed, negativ e voltage regulator w hich offers lo w dropout and output voltage accurac y to ± 1 %
maximum. The lo w θjc combined w ith lo w dropout allo w s increased output current and excellent device efficiency. The
MSK 5 3 3 2 offers both internal current limit and thermal overload protection. The case of the device is electrically isolated
for heat sinking purposes. The device is packaged in a space efficient 3 pin po w er package w ith various lead form options.
The M SK 5 3 3 2 series is also available in a po w er package w ith a top tab to accomodate direct mounting to a heat sink.
E Q UIV A LEN T S C HEM A TIC
T YPIC A L A PPLIC A TIO NS
PIN-O U T IN F ORM A TIO N
High Efficienc y Linear Regulators
C onstant V oltage/ C urrent Regulators
S ystem Po w er Supplies
S w itching Po w er Supply Post Regulators
1
2
3
1
GND
VIN
V OUT
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A BS OLU T E M A XIM U M R A TIN G S
-V IN
PD
IO U T
TJ
Input V oltage (W RT V O U T )
Po w er Dissipation
O utput C urrent
Junction T emperature
9
-30 V
Internally Limited
-3 A
+ 150 ° C
T ST
T LD
TC
Storage Temperature Range
Lead Temperature Range
(1 0 Seconds)
C ase Operating Temperature
MSK 5 3 3 2 H/E
M SK 5 3 3 2
-6 5 ° C to + 1 5 0 ° C
300 ° C
-5 5 ° C to + 1 2 5 ° C
-4 0 ° C to + 8 5 ° C
ELE C TRIC A L SPE CIFIC A TIO NS
Parameter
O utput V oltage T olerance
Dropout V oltage 2
Load Regulation
Line Regulation
Q uiescent C urrent
Short Circuit C urrent 2
Ripple Rejection 2
T hermal Resistance 2
T est C onditions
M S K 5 3 3 2 H/E
Group A
3
Subgroup M in .
I O U T = 1 0 m A ; V IN = V O U T + 3 V
MSK 5332
Units
T yp.
Max.
M in .
T yp.
Max.
0.1
2.0
%
1
-
0.1
1.0
-
0.1
2.0
2,3
-
-
-
-
%
0 A ≤I O U T ≤3 A ; ΔV O U T = 1 %
1
-
0.8
1.2
-
0.8
1.3
V
1 0 m A ≤I O U T ≤3 A
1
-
0.2
1.0
-
0.2
2.0
%
V IN = V O U T + 3 V
2,3
-
0.3
2.0
-
-
-
%
IO U T = 1 0 m A
1
-
0.1
0.5
-
0.1
0.6
%
( V O U T + 3 V )≤ V IN ≤( V O U T + 1 5 V )
2,3
-
0.2
0.75
-
-
-
%
1
-
4.5
10
-
4.5
12
mA
2,3
-
4.5
10
-
-
-
mA
-3 . 6
-3 . 3
V IN = V O U T + 3 V ; I O U T = 1 0 m A
V IN = V O U T + 5 V
-
-
-
-3 . 6
-3 . 0
A
I O U T = 3 A ; C O U T = 2 5 µF ; f = 1 2 0 H z
-
60
75
-
60
75
-
dB
J U N C TIO N T O C A SE @ 1 2 5 ° C
-
-
7.0
7.2
-
7.0
7.2
° C/W
PART
NUMBER
N O TES:
O U TPU T V OLT A GE
7
M S K 5 3 3 2-5 . 0
-5 . 0 V
M S K 5 3 3 2-5 . 2
-5 . 2 V
M S K 5 3 3 2-1 0
-1 0 . 0 V
M S K 5 3 3 2-1 2
-1 2 . 0 V
M S K 5 3 3 2-1 5
-1 5 . 0 V
1 O utput is decoupled to ground using 3 3µF minimum, lo w ESR capacitors unless other w ise specified.
2 Guaranteed by design but not tested. T ypical parameters are representative of actual device
performance but are for reference only.
3 A ll output parameters are tested using a lo w dut y c y cle pulse to maintain T J = T C .
4 Industrial grade and " E " suffix devices shall be tested to subgroup 1 unless other w ise specified.
5 Military grade de vices ( " H " suffix) shall be 1 0 0 % tested to subgroups 1 , 2 and 3 .
6 Subgroup 1 T A = T C = + 2 5 ° C
2 TA = TC = + 125 ° C
3 T A = T C = -5 5 ° C
7 Please consult the factory if alternate output voltages are required.
8 Input voltage (V IN = V O U T + a specified voltage) is implied to be more negative than V O U T .
9 C ontinuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.
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A PPLIC A TIO N N O TES
BYPA SS C APA CIT ORS
O V ERLO A D SH U T D O W N
For most applications a 3 3 uF minimum, lo w ESR (0 . 5-2 ohm)
tantalum capacitor should be attached as close to the regulator's
output as possible. T his w ill effectiv ely lo w er the regulator's
output impedance, increase transient response and eliminate any
oscillations that are normally associated w ith lo w dropout regulators. A dditional bypass capacitors can be used at the remote
load locations to further improve regulation. These can be either
of the tantalum or the electroly tic v ariet y. Unless the regulator
is located v ery close to the po w er supply filter capacitor(s), a
4 . 7uF minimum lo w ESR (0 . 5-2 ohm) tantalum capacitor should
also be added to the regulator's input. A n electroly tic ma y also
be substituted if desired. W hen substituting electrolytic in place
of tantalum capacitors, a good rule of thumb to follo w is to
increase the size of the electroly tic by a factor of 1 0 ov er the
tantalum value.
T he M S K 5 3 3 2 features both po w er and thermal ov erload
protection. W hen the ma ximum po w er dissipation is not e xceeded, the regulator w ill current limit slightly abov e its 3 amp
rating. A s the V in-V out voltage increases, ho w e v er, shutdo w n
occurs in relation to the ma ximum po w er dissipation curv e. If
the de vice heats enough to e x ceed its rated die junction temperature due to e x cessiv e ambient temperature, improper heat
sinking etc., the regulator w ill shutdo w n until an appropriate
junction temperature is maintained. It should also be noted that
in the case of an e x treme ov erload, such as a sustained direct
short, the device may not be able to recover. In these instances,
the device must be shut off and po w er reapplied to eliminate the
shutdo w n condition.
HE A T SIN KIN G
T o determine if a heat sink is required for your application
and if so, w hat t ype, refer to the thermal model and gov erning equation belo w .
LO A D REG ULA TIO N
For best results the ground pin should be connected directly
to the load as sho w n belo w , this effectiv ely reduces the ground
loop effect and eliminates e x cessiv e voltage drop in the sense
leg. It is also important to keep the output connection bet w een
the regulator and the load as short as possible since this directly
affects the load regulation. For e x ample, if 2 0 gauge w ire w ere
used w hich has a resistance of about . 0 0 8 ohms per foot, this
w ould result in a drop of 8 m V /ft at 1 A mp of load current. It is
also important to follo w the capacitor selection guidelines to
achieve best performance. Refer to Figure 1 for connection diagram.
G ov erning Equation: Tj = Pd x (Rθ jc + Rθ cs + Rθsa) + T a
M S K 5 3 3 2 T YPIC A L A PPLIC A TIO N:
W H ERE
Tj = Junction T emperature
Pd = T otal Po w er Dissipation
Rθjc = Junction to C ase T hermal Resistance
Rθ cs = C ase to H eat Sink T hermal Resistance
Rθ sa = H eat Sink to A mbient T hermal Resistance
T c = C ase T emperature
T a = A mbient T emperature
Ts = H eat Sink T emperature
Lo w Dropout N egativ e Po w er Supply
E X A MPLE:
This example demonstrates an analysis w here the regulator is at
one-half of its ma ximum rated po w er dissipation, w hich occurs
w hen the output current is at 1 . 5 amps.
C onditions for M S K 5 3 3 2-5 :
V in = -7 . 0 V ; Iout = -1 . 5 A
1 .) A ssume 4 5 ° heat spreading model.
2 .) Find regulator po w er dissipation:
Pd = (V in - V out)(Iout)
Pd = (-7-(-5))(-1 . 5)
= 3.0 W
FIG URE 1
3 .)
4 .)
5 .)
6 .)
7 .)
For conserv ativ e design, set Tj = + 1 2 5 ° C M a x.
For this e x ample, w orst case T a = + 9 0 ° C .
Rθ jc = 7 . 2 ° C / W from the Electrical Specification T able.
Rθ cs = 0 . 1 5 ° C / W for most thermal greases.
Rearrange gov erning equation to solv e for Rθsa:
Rθ sa = ((Tj - T a)/Pd) - (Rθjc) - (Rθ cs)
= (1 2 5 ° C - 9 0 ° C)/3 . 0 W - 7 . 2 ° C / W - 0 . 1 5 ° C / W
= 4.3 ° C/W
In this case the result is 4 . 3 ° C / W . T herefore, a heat sink w ith a
thermal resistance of no more than 4 . 3 ° C / W must be used in
this application to maintain the regulator junction temperature
under 1 2 5 ° C .
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T YPIC A L PERF ORM A N C E C UR V ES
4
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ME C H A NIC A L SPE CIFIC A TIO NS
ES D TRIA N GLE IN DIC A T ES PIN 1
W EIG H T = 3 . 1 5 GR A M S T YPIC A L
N O T E:
A LL DIM EN SIO N S A RE ± 0 . 0 1 0 IN C HES U NLESS O T HER WISE L A BELED.
ORDERIN G IN F ORM A TIO N
M S K 5 3 3 2-5 . 0 H T D
LE A D C O N FIG UR A TIO N S
(G ULL WIN G N O T A V AIL A BLE WIT H T OP T A B V ERSIO N)
S = S TR AIG H T ; U = BEN T UP; D = BEN T D O W N
P A C K A G E S T YLE
T = T OP T A B; BL A N K = N O T A B
S CREENIN G
BL A N K = IN D U S TRIA L; E = E X T EN DED RELIA BILIT Y
H = MIL-PRF-3 8 5 3 4 CL A SS H
O U TPU T V OLT A G E
5 . 0 = -5 . 0 V ; 5 . 2 = -5 . 2 V ; 1 0 = -1 0 . 0 V ; 1 2 = -1 2 . 0 V ; 1 5 = -1 5 . 0 V
G ENER A L P A RT N U M BER
5
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ME C H A NIC A L SPE CIFIC A TIO NS
ES D TRIA N GLE IN DIC A T ES PIN 1
W EIG H T = 2 . 6 GR A M S T YPIC A L
N O T E:
M S K 5 3 3 2-5 . 0 H
G
A LL DIM EN SIO N S A RE ± 0 . 0 1 0 IN C HES U NLESS O T HER WISE L A BELED.
ORDERIN G IN F ORM A TIO N
LE A D C O N FIG UR A TIO N S
(G ULL WIN G N O T A V AIL A BLE WIT H T OP T A B V ERSIO N)
S = S TR AIG H T ; U = BEN T UP; D = BEN T D O W N; G = G ULL WIN G
P A C K A G E S T YLE
T = T OP T A B; BL A N K = N O T A B
S CREENIN G
BL A N K = IN D U S TRIA L; E = E X T EN DED RELIA BILIT Y
H = MIL-PRF-3 8 5 3 4 CL A SS H
O U TPU T V OLT A G E
5 . 0 = -5 . 0 V ; 5 . 2 = -5 . 2 V ; 1 0 = -1 0 . 0 V ; 1 2 = -1 2 . 0 V ; 1 5 = -1 5 . 0 V
G ENER A L P A RT N U M BER
T he abov e e x ample is a -5 . 0 V , Class H Military regulator w ith gull w ing leads.
M .S. K ennedy C orp.
4 7 0 7 D e y Road, Liv erpool, N e w Y ork 1 3 0 8 8
Phone (3 1 5) 7 0 1-6 7 5 1
F A X (3 1 5) 7 0 1-6 7 5 2
w w w .mskennedy.com
T he information contained herein is belie v ed to be accurate at the time of printing. M S K reserv es the right to make
changes to its products or specifications w ithout notice, ho w e v er, and assumes no liabilit y for the use of its products.
Please visit our w ebsite for the most recent re vision of this datasheet.
C ontact M S K for MIL-PRF-3 8 5 3 4 Q ualification Status.
6
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