Electronics
SAT8566AH
Quad Point-of-Load Switching Regulator Module
4.5Vdc - 10Vdc Input, 3-15A Output Current
Preliminary
FEATURES
•
•
•
•
Adjustable Output Voltages
Integrated Input/ Output Capacitors and Inductors
Internal Soft Start
Up to 4 separate output Voltages
DESCRIPTION
The SAT8566 is a 4-channel, non-isolated PowerPac module designed for high reliability and full military point
of load applications. This device can be used to provide up to 4 separate outputs at 4A each or one output at
15A. Fully integrated, the SAT8566 includes buck controllers, inductors, and capacitors in a single package.
The SAT8566 is optimized for an input voltage of +4.5V to +6V providing efficient step down power
conversion for output voltages as low as 1.21V. Operating features include output voltage adjust, output current
limit, shutdown and low output ripple. Careful design and layout ensure excellent stability, transient response,
and low noise operation. Packaged in a hermetic 42-Pin Flat-pack, the SAT8566 is available screened to Class-
H 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
Pd
Rthjc
Vshdn
Vsync
Tstg
Tj
Tsold
Parameter
DC input Voltage Vin-Vground
Power Dissipation Tcase=25deg.C, (per channel)
Thermal Resistance, Junction to Case- (Per regulator circuit)
5
Shutdown Pin Voltage
Sync Pin Voltage
Storage Temperature
Operating Temperature Range
Maximum Soldering Temperature, 10sec
Value
15.0
10
4.5
7.0
7.0
-65 to +150
-55 to +125
300
Unit
V
W
o
C/W
V
V
o
C
o
C
o
C
SatCon Electronics
www.satcon.com
1
SAT8566AH Preliminary Rev 1
ELECTRICAL CHARACTERISTICS @ Ta=-55deg.C to +125deg.C
(Unless Otherwise Specified)
Table 2.
(Per channel)
Symbol
Parameter
Test Conditions
Min
Vout
Kvi
Kvo
Vin
Vr
Isc
Ishdn
Vshdn
Output Voltage accuracy
Line Regulation
Load regulation
Input Voltage Range
Output ripple
Short-circuit current Limit
(per channel)
Shutdown Source Current
Shutdown Input Voltage
1,2
Vin=5.0V, Iout=3.0A, Vo= Vref
+4.5V
≤
Vin
≤
+6.0V, Iout = 3A
Vin = 5V, 1A
≤
Iout
≤
3A
Iout= 3.0A
4.5
30
Vin=5.0V, Vo= < 0.5V
Vin=6.0V; Vshdn=0, Vsw=0
Vin=5.0, Vout < 0.5V
0.4
6.0
75
Value
Typ
1.0
.1
1.0
10
50
Max
2.0
Units
%
%
%
V
mV
A
uA
V
Notes:
1. Output Inhibit guaranteed @ Vshdn< 0.4V.
2. Shutdown pin must be pulled up to Vin (Rpullup≤ 5KΩ), when not in use.
3. For regulators in parallel, the thermal resistance = (θj-c/# of regulators in parallel). Therefore, 4 regulators
in parallel would have a Maximum
θj-c=
1.125
o
C/W.
SatCon Electronics
2
SAT8566AH Preliminary Rev 1
Typical Performance Characteristics
Efficiency vs. Output Current
Vin= +5V
90.00%
85.00%
80.00%
75.00%
70.00%
0
1
2
3
4
5
+2.5V
+3.3V
Efficiency
100.00%
80.00%
60.00%
40.00%
20.00%
0.00%
0
Efficiency vs. Current
Vin= +5V
Efficiency
+1.8V
+1.5V
2
4
6
Output Current (A)
Output Current (A)
Figure 2, Efficiency per channel
SatCon Electronics
3
SAT8566AH Preliminary Rev 1
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