Electronics
SAT8564
Point-of-Load Switching Regulator
4.5Vdc - 6Vdc Input, 1.21Vdc - 5.0Vdc Output, 4.5A
(Preliminary)
FEATURES
•
Input Range 4.5V to 6V
•
Adjustable or Fixed Output Voltage
•
Up to 4.5A Output Current
•
Integrated Input & Output Capacitors
•
Remote-Sense operation
•
Under-Voltage Lockout
•
Internal Soft Start
•
Current Limiting
•
Efficiencies up to 85%
•
120W/in
3
Power Density
PRELIMINARY
DESCRIPTION
The SAT8564 is a non-isolated PowerPac module for high reliability and full military distributed power, point
of load applications. Fully integrated, the SAT8564 includes buck controller, inductor, and input/output
capacitors integrated in a single package. The SAT8564 operates from an input voltage of +4.5V to +6V
providing step down power conversion to any output voltage from 1.21V to 5.0V. Operating features include
output voltage adjust, output current limit, shutdown, external synchronization, soft start and under voltage
lockout. Careful design and layout ensure excellent stability, transient response, and low noise operation.
Packaged in a compact 16-lead flat-pack the SAT8564 is manufactured in a facility certified to MIL-PRF-
38534, class H & K and operates over the full –55
o
C to +125
o
C temperature range.
ABSOLUTE MAXIMUM RATINGS
(Exceeding maximum ratings may damage the device)
Table.1
Symbol
Vin
Vo
Io
Pd
Rthjc
Tstg
Tj
Tsold
Parameter
DC input Voltage Vin-Vground
DC output Voltage
Output Current
Power Dissipation Tcase=25deg.C
Thermal Resistance, Junction to Case
Storage Temperature
Operating Temperature Range
Maximum Soldering Temperature, 10sec
Value
15
4.0
4.5
25
4.0
-65 to +150
-55 to +125
300
unit
V
V
A
W
o
C/W
o
C
o
C
o
C
SatCon Electronics
www.satcon.com
1
SAT8564 Preliminary WebRev 1
ELECTRICAL CHARACTERISTICS @ Ta=-55deg.C to +125deg.C
(Unless Otherwise Specified)
Symbol
Vout
Kvi
Kvo
Vin
Fsync
Vsync
Isc
Ishdn
Vshdn
Parameter
Output Voltage accuracy
Line Regulation
Load regulation
Input Voltage Range
Synchronizing Range
Sync input voltage, (note 1)
Short-circuit current Limit
Ripple Rejection
Shutdown Source Current
Shutdown Input Voltage
(Note 2,3)
Vin=5.0V,
F=120Hz, Iout=50mA
Vshdn=5.0V
Vin=5.0, Vout < 0.5V
0.4
55
75
Test Conditions
Min
Vin=5.0V, Iout=3.0A
+4.5V
≤
Vin
≤
+6.0V, Iout = 4A
Vin = 5V, 1A
≤
Iout
≤
4A
Iout=2.5A
4.5
580
1.5
6.0
Value
Typ
2.0
0.1
2.0
6
1000
2.2
Max
%
%
%
V
KHz
V
A
dB
uA
V
Units
Notes:
1. Synch input should be grounded when not in use.
2. Output Inhibit guaranteed @ Vshdn< 0.4V.
3. Shutdown input should be pulled up to Vin when not used.
4. At this time, SatCon does NOT have a DSCC approved Radiation Program
SatCon Electronics
2
SAT8564 Preliminary WebRev 1
Application Circuits
Figure 3.- Basic Fixed Regulator Version
1
V
out
= V
ref
x (1+R
adj
/2490), with Vref~1.21 Volts
Figure 4.- Adjustable Regulator Version
1
V
out
(V)
1.21
1.5
1.8
2.0
2.2
2.5
R
adj
(Ω)
0
590
1210
1620
2050
2670
V
out
(V)
2.8
3.0
3.3
3.5
3.8
4.0
R
adj
(Ω)
3240
3650
4320
4750
5360
5760
Table 4.- Commonly Available 1% resistor values for various output Voltages
Figure 5.- Remote Sense Version
1
SatCon Electronics
3
SAT8564 Preliminary WebRev 1
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